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TECHNICAL MANUAL
OPERATOR'S, UNIT,DIRECT SUPPORT, AND
GENERAL SUPPORT MAINTENANCE MANUAL(INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS)
OPERATING INSTRUCTIONS 2-1
OPERATOR MAINTENANCEINSTRUCTIONS 3-1
UNIT MAINTENANCEINSTRUCTIONS 4-1
DIRECT SUPPORT AND GENERALSUPPORT MAINTENANCEINSTRUCTIONS 5-1
MAINTENANCE ALLOCATIONCHART B-1
REPAIR PARTS AND SPECIALTOOLS LIST F-1
TRAILER, AMMUNITION,HEAVY EXPANDED MOBILITY,
11 TON, M989A1(2330-01-275-7474) (EIC: CAG)
APPROVED FOR PUBLIC RELEASE. DISTRIBUTION IS UNLIMITED.
________________________________________________________________
HEADQUARTERS, DEPARTMENT OF THE ARMY
DECEMBER 1991
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________WARNING
Dry cleaning solvent (MIL-PRF-680, type I) is extremely flammable,
toxic, and is an irritant to the eyes, skin, and respiratory system. Do
not use near open flame or excessive heat. Do not breathe the vapors.
Use skin and eye protection and work in a well ventilated area. Flash
point of the dry cleaning solvent is 140F.
Protect eyes when opening drain cock and avoid the air stream. Failure
to do so could result in personal injury.
A hot brake or drum can cause serious burns. Exercise extreme caution
before attempting to touch brake drum after use. Slowly move hand
toward drum. If drum is overheated, radiated heat will be felt before
the hand actually touches the drum.
Two persons are required to connect towing vehicle and trailer; one
operates the towing vehicle, and one lifts the towbar with tiedown
strap and acts as a spotter.
Be alert for other moving vehicles in the area. Do not stand between
towing vehicle and trailer when towing vehicle is Lacking up. Serious
injury can result if personnel are caught between vehicles. Set chocks
front and rear of rear tires on trailer.
Make sure cotter pin is properly installed in pintle so trailer does
not break loose and cause injury to personnel.
The side panels are heavy and awkward to handle. Use caution and two
persons when removing or replacing side panels to avoid injury to
personnel.
Do not allow any personnel to stand between the towing vehicle and
trailer when backing. Make sure that you can see your ground guides at
all times. Serious injury or death can occur if personnel are caught
between moving vehicles.
Backing the trailer without locking towbar may cause vehicle to
jackknife, injuring personnel and damaging equipment. Perform this
procedure only when absolutely necessary.
When trailer has been backed with towbar locked, pull forward to
relieve sideload pressure between pintle and towbar before attempting
to unlock towbar lockpin or disconnect from pintle. Failure to relieve
sideload may result in injury to personnel.
Two people and the davit crane from HEMTT will be required to raise orlower the spare tire. Clear all personnel from the immediate area to
prevent possible injury when the tire is lifted from the deck. Use all
possible care when handling to prevent injury. The tire weighs
approximately 300 pounds.
The tire weighs approximately 300 pounds. Use two people and a suitable
lifting device and exercise care in handling to prevent injury.
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________WARNING
Take care not to get grease on brake shoes or brake linings, as this
will cause uneven or poor braking action, and may result in personal
injury or equipment damage.
Changing wheels and tires on the trailer requires two people and
considerable caution to avoid possible injury. The wheel opposite from
the one being changed must be chocked front and rear.
Wheels and tires are heavy. To avoid personal injury, use two people
when handling wheels and tires.
When caging brake air chamber, do not remove flange nuts or bolts. High
spring pressure inside air chamber can cause injury if released.
Do not attempt to disassemble brake air chambers. The springs inside
the chambers are under heavy tension and may cause severe injury if
released during disassembly.
To avoid personal injury, never work under a vehicle supported only by
a jack. Always use cap on jack when raising axles.
Use two persons when removing brake drum to avoid injury.
Be careful when removing air cleaner top nut because of high spring
pressure behind nut.
Towbar is heavy and requires three persons to safely remove it: two
persons to support towbar while one person removes pin.
Towbar pivot is heavy and will fall when pin is removed. Support pivot
before removing pin.
Pivot bar is heavy. Remove carefully to avoid personal injury.
The resin and hardener contained in the two-part epoxy coating may
cause irritation to the skin and eyes. Plastic gloves should be worn
while handling these materials. Wipe these materials from the skin
using dry cleaning solvent (MIL-PRF-680, type I), and wash with soap
and warm water if contact is made. Wear goggles when applying coating
to prevent contact with the eyes.
Coatings can cause internal injury during prolonged breathing of
vapors. Wear respirator to prevent inhaling vapors. Use adequate
ventilation.
To avoid injury to personnel and damage to equipment, connecting the
trailer requires two persons.
Do not stand between towing vehicle and trailer or on front deck area
when vehicle is backing up. Serious injury can occur
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Ch a n g e 1 c
________
WARN I N G
Wh e n u s i n g f o l d a b l e s t e p s , t a k e c a r e t o p l a c e f o o t o n c e n t e r o f s t e p .
O t h e r wi s e f o o t ma y s l i p o f f s i d e , r e s u l t i n g i n s e r i o u s i n j u r y .
T w o p e r s o n s a r e r e q u i r e d t o r a i s e o r l o w e r s i d e p a n e l s .
T w o p e r s o n s a r e r e q u i r e d t o r e mo v e o r i n s t a l l d a v i t c r a n e o n H E MT T o r
t r a i l e r , o n e p e r s o n o n v e h i c l e a n d o n e p e r s o n o n g r o u n d . H o i s t a r m
we i g h s 4 6 p o u n d s a n d e x t e n s i o n we i g h s 2 2 p o u n d s . Ha n d l e b o t h c a r e f u l l yt o a v o i d i n j u r y t o p e r s o n n e l .
D o n o t l e a n a g a i n s t d a v i t c r a n e w h i l e r o u t i n g c a b l e o v e r e n d o f p u l l e y .
D a v i t c r a n e i s d e s i g n e d t o mo v e i n mo u n t a n d c o u l d c a u s e a f a l lr e s u l t i n g i n s e r i o u s i n j u r y .
Wh e n d a v i t c r a n e l i f t s t i r e c l e a r o f g r o u n d , w e i g h t w i l l s h i f t . U s e a l lp o s s i b l e c a u t i o n w h e n g u i d i n g t i r e t o a v o i d p o s s i b l e i n j u r y .
D o n o t s t a n d b e n e a t h s p a r e t i r e a t a n y t i me . U s e c a u t i o n w h e nr e p o s i t i o n i n g a n d l o we r i n g s p a r e t i r e .
D o n o t s t a n d o n f r o n t d e c k w h e n r a i s i n g s p a r e t i r e .
To p r e v e n t t i r e f r o m s l i p p i n g a n d c a u s i n g p e r s o n a l i n j u r y , l i f t i n gp l a t e mu s t b e i n s t a l l e d a s s h o w n , w i t h l i f t i n g p l a t e l u g s i n l o w e r
h o l e s , a n d l o o p i n c e n t e r o f t i r e .
P e r s o n n e l o n f r o n t d e c k mu s t u s e e x t r e me c a r e t o a v o i d t r i p p i n g o v e rs p a r e t i r e , f i r e e x t i n g u i s h e r , a n d l i f t i n g e y e s . O t h e r wi s e s e r i o u s
i n j u r i e s ma y o c c u r .
T w o p e r s o n s a r e r e q u i r e d t o r e p o s i t i o n d a v i t c r a n e a n d t i r e . U s e
e x t r e me c a r e t o a v o i d t r i p p i n g o v e r s p a r e t i r e mo u n t , f i r ee x t i n g u i s h e r , a n d l i f t i n g e y e s . O t h e r wi s e s e r i o u s i n j u r y c o u l d o c c u r .
D o n o t a t t e mp t t o d i s mo u n t t i r e u n t i l t i r e h a s b e e n c o mp l e t e l yd e f l a t e d . Wh e n r e l e a s e d s u d d e n l y , a i r u n d e r p r e s s u r e c a n c a u s e s e r i o u s
i n j u r y .
E n s u r e a l l p e r s o n n e l a r e c l e a r o f t o r s i o n b a r s .
To w wi t h t h e M2 7 0 d u r i n g wa r t i me u s a g e , u n d e r e me r g e n c y c o n d i t i o n s
o n l y , a s a l a s t r e s o r t . I n j u r y o r d e a t h t o p e r s o n n e l ma y r e s u l t .
U s e e x t r e me c a u t i o n w h e n t o w i n g t h e t r a i l e r w i t h t h e M2 7 0 . T r a i l e r w i l l
h a v e n o b r a k i n g c a p a b i l i t y . D e a t h o r s e r i o u s i n j u r y ma y r e s u l t .
To a v o i d i n j u r y t o p e r s o n n e l a n d d a ma g e t o t h e e q u i p me n t , s e t c h o c k sf r o n t a n d r e a r o f r e a r t i r e s o n t r a i l e r w h e n c o n n e c t i n g / d i s c o n n e c t i n gf r o m/ t o t o wi n g v e h i c l e .
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________WARNING
To avoid injury, personnel must stand clear of trailer suspension when
opening drain cocks on air reservoirs. Trailer suspension will drop as
air is released.
Do not attempt to move the HEMAT vehicle by hand after it has been
disconnected from the towing vehicle. The brake chambers are designed
to apply automatically when the trailer is disconnected from the towing
vehicle or if loss of air pressure occurs. The brakes are not to be
hand activated to override the control valve under any circumstances.
Attempting to move the trailer by hand could result in serious injury
or death to personnel and damage to equipment.
Drum and tank tiedown kit must be installed before loading fuel
bladders or fuel drums onto trailer or injury to personnel and damage
to equipment could occur.
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TM 9 - 2 3 3 0 - 3 8 3 - 1 4 &P
Ch a n g e HE ADQUART E RS
No . 1 DE P ART ME NT OF T HE ARMYWa s h i n g t o n , D. C. , 3 1 J a n u a r y 2 0 0 2
O P E R A T OR ' S , U N I T , D I R E C T S U P P O RT ,
AND GENERAL S UP P ORT MAI NTENANCE MANUAL
( I N C L U DI NG R E P A I R P A R T S A N D S P E C I AL T O OL S L I S T S )
F OR
TRAI LER, AMMUNI TI ON,HEAVY EXP ANDED MOBI LI TY,
1 1 T O N , M9 8 9 A 1
( 2 3 3 0 - 0 1 - 2 7 5 - 7 4 7 4 ) ( EI C: CAG)
T M 9 - 2 3 3 0 - 3 8 3 - 1 4 &P , 1 3 De c e mb e r 1 9 9 1 , i s c h a n g e d a s f o l l o ws :
1 . Re mo v e o l d p a g e s a n d i n s e r t n e w p a g e s a s i n d i c a t e d b e l o w . N e w o r c h a n g e dma t e r i a l i s i n d i c a t e d b y a v e r t i c a l b a r i n t h e ma r g i n o f t h e p a g e . C h a n g e s t o
i l l u s t r a t i o n s a r e i n d i c a t e d b y mi n i a t u r e p o i n t i n g h a n d s .
R e mo v e P a g e s I n s e r t P a g e s
b a n d c a t h r u di t h r u i v i t h r u i v
1 - 3 t h r u 1 - 8 1 - 3 t h r u 1 - 8
1 - 9 / ( 1 - 1 0 Bl a n k ) 1 - 9 a n d 1 - 1 0
No n e 1 - 1 1 / ( 1 - 1 2 Bl a n k )2 - 9 a n d 2 - 1 0 2 - 9 a n d 2 - 1 02 - 1 3 t h r u 2 - 1 8 2 - 1 3 t h r u 2 - 1 8
No n e 2 - 1 8 . 1 / ( 2 - 1 8 . 2 Bl a n k )2 - 1 9 t h r u 2 - 2 6 2 - 1 9 t h r u 2 - 2 6
No n e 2 - 2 6 . 1 a n d 2 - 2 6 . 22 - 2 7 t h r u 2 - 3 4 2 - 2 7 t h r u 2 - 3 4
No n e 2 - 3 4 . 1 / ( 2 - 3 4 . 2 Bl a n k )
2 - 3 5 a n d 2 - 3 6 2 - 3 5 a n d 2 - 3 62 - 3 9 a n d 2 - 4 0 2 - 3 9 a n d 2 - 4 0
2 - 4 1 / ( 2 - 4 2 Bl a n k ) 2 - 4 1 a n d 2 - 4 2No n e 2 - 4 3 / ( 2 - 4 4 Bl a n k )3 - 1 t h r u 3 - 1 4 3 - 1 t h r u 3 - 1 4
3 - 1 7 / ( 3 - 1 8 Bl a n k ) 3 - 1 7 / ( 3 - 1 8 Bl a n k )4 - 1 t h r u 4 - 4 4 - 1 t h r u 4 - 4
4 - 7 a n d 4 - 8 4 - 7 a n d 4 - 84 - 1 1 t h r u 4 - 1 6 4 - 1 1 t h r u 4 - 1 6
No n e ( 4 - 1 6 . 1 B l a n k ) / 4 - 1 6 . 2
4 - 1 7 a n d 4 - 1 8 4 - 1 7 a n d 4 - 1 8
No n e 4 - 1 8 . 1 a n d 4 - 1 8 . 24 - 1 9 a n d 4 - 2 0 4 - 1 9 a n d 4 - 2 0No n e 4 - 2 0 . 1 / ( 4 - 2 0 . 2 Bl a n k )4 - 2 1 a n d 4 - 2 2 4 - 2 1 a n d 4 - 2 2
4 - 2 5 t h r u 4 - 3 2 4 - 2 5 t h r u 4 - 3 24 - 3 7 t h r u 4 - 4 2 4 - 3 7 t h r u 4 - 4 2
No n e 4 - 4 2 . 1 a n d 4 - 4 2 . 2
4 - 4 3 a n d 4 - 4 4 4 - 4 3 a n d 4 - 4 44 - 5 5 t h r u 4 - 5 8 4 - 5 5 t h r u 4 - 5 8
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Ch a n g e 1 A
LIST OF EFFECTIVE PAGES INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.
NOTE: The portion of the text affected by changes is indicated by a vertical line in the outer marginsof the page. Changes to illustrations are indicated by miniature pointing hands. Changes towiring diagrams are indicated by shaded areas.
Dates of original and changed pages are:Original ... 0 ... 13 December 1991
Change 1 . ..31 January 2002
TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 378 CONSISTING OF THE FOLLOWING:
Page *Change Page *ChangeNo. No. No. No.
Front Cover ............................................ 1Blank Back............................................. 1
a - d ........................................................ 1
i - iv........................................................ 11-1 - 1-2 ................................................. 0
1-3............. ............................................. 1
1-4............. ............................................. 01-5 - 1-11 ............................................... 1
1-12 Blank.............................................. 1
2-1 - 2-8 ................................................. 02-9............. ............................................. 1
2-10 - 2-13.............................................. 02-14 - 2-18.............................................. 1
2-18.1........ ............................................. 1
2-18.2 Blank........................................... 12-19 - 2-26.............................................. 1
2-26.1 - 2-26.2........................................ 1
2-27........... ............................................. 02-28........... ............................................. 1
2-29........... ............................................. 0
2-30 - 2-31.............................................. 12-32 - 2-33.............................................. 0
2-34........... ............................................. 1
2-34.1........ ............................................. 12-34.2 Blank........................................... 1
2-35........... ............................................. 1
2-36 - 2-38.............................................. 02-39........... ............................................. 1
2-40........... ............................................. 0
2-41 - 2-43.............................................. 12-44 Blank.............................................. 1
3-1 ......................................................... 0
3-2........... ............................................... 13-3........... ............................................... 0
3-4........... ............................................... 1
3-5........... ............................................... 03-6 - 3-10 ............................................... 1
3-11........... ............................................. 0
3-12 - 3-14.............................................. 13-15 - 3-16.............................................. 0
3-17........... ............................................. 1
3-18 Blank.............................................. 14-1 - 4-3 ................................................. 1
4-4 - 4-7 ................................................. 04-8............. ............................................. 14-9 - 4-11 ............................................... 0
4-12 - 4-13.............................................. 1
4-14 - 4-15 ............................................. 04-16........................................................ 1
4-16.1 Blank .......................................... 1
4-16.2..................................................... 1
4-17 - 4-18 ............................................. 1
4-18.1 - 4-18.2 ....................................... 1
4-19 - 4-20 ............................................. 14-20.1..................................................... 1
4-20.2 Blank .......................................... 1
4-21........................................................ 04-22........................................................ 1
4-23 - 4-24 ............................................. 0
4-25........................................................ 1
4-26........................................................ 0
4-27 - 4-32 ............................................. 14-33 - 4-37 ............................................. 0
4-38 - 4-39 ............................................. 1
4-40 - 4-41 ............................................. 04-42........................................................ 1
4-42.1 - 4-42.2 ....................................... 1
4-43 - 4-44 ............................................. 1
4-45 - 4-55 ............................................. 0
4-56 - 4-58 ............................................. 1
4-58.1 - 4-58.18 ..................................... 14-59........................................................ 1
4-60........................................................ 0
4-61........................................................ 14-62 - 4-72 ............................................. 0
4-73 - 4-77 ............................................. 1
4-78 - 4-90 ............................................. 0
4-91 - 4-94 ............................................. 1
4-95........................................................ 0
4-96 Blank ............................................. 05-1 - 5-17 ............................................... 0
5-18........................................................ 1
A-1......................................................... 0A-2......................................................... 1
B-1 - B-8................................................ 0
B-9......................................................... 1B-10....................................................... 0
C-1 - C-4................................................ 1
D-1......................................................... 1D-2 Blank .............................................. 1
E-1 ......................................................... 0E-2 - E-3 ................................................ 1E-4 Blank............................................... 1
F-1 - F-9................................................. 1
*Zero in this column indicates an original page.
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LIST OF EFFECTIVE PAGES INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.
NOTE: The portion of the text affected by changes is indicated by a vertical line in the outer marginsof the page. Changes to illustrations are indicated by miniature pointing hands. Changes towiring diagrams are indicated by shaded areas.
Page *Change Page *ChangeNo. No. No. No.
Fig. 1 - 1-1..............................................1Fig. 1A - 1A-1........................................ 1
Fig. 2 - 2-1..............................................1
Fig. 3 (Sheet 1) - 3-1 .............................. 1Fig. 3 (Sheet 2) - 3-2 .............................. 1
Fig. 4 - 4-1..............................................1
Fig. 5 - 5-1..............................................1Fig. 6 (Sheet 1) - 6-1 .............................. 1
Fig. 6 (Sheet 2) - 6-2 .............................. 1
Fig. 7 - 7-1..............................................1Fig. 8 - 8-1..............................................1
Fig. 8A - 8A-1........................................ 1
8A-3 ....................................................... 1Fig. 9 - 9-1..............................................1
Fig. 10 - 10-1.......................................... 1Fig. 11 - 11-1.......................................... 1Fig. 12 - 12-1.......................................... 1
Fig. 13 - 13-1.......................................... 1Fig. 14 - 14-1.......................................... 1
Fig. 15 - 15-1.......................................... 1
Fig. 16 - 16-1.......................................... 1Fig. 17 - 17-1.......................................... 1
Fig. 18 (Sheet 1) - 18-1 .......................... 1
Fig. 18 (Sheet 2) - 18-2 .......................... 1Fig. 19 - 19-1.......................................... 1
Fig. 20 - 20-1.......................................... 1
Fig. 21 - 21-1.......................................... 1
Fig. 22 - 22-1 ......................................... 1Fig. 23 - 23-1 ......................................... 1
Fig. 24 - 24-1 ......................................... 1
Fig. 25 - 25-1 ......................................... 1Fig. 26 - 26-1 ......................................... 1
Fig. 27 - 27-1 ......................................... 1
Fig. 28 - 28-1 ......................................... 1
Fig. 29 (Sheet 1) - 29-1.......................... 1
Fig. 29 (Sheet 2) - 29-2.......................... 1
Fig. 30 - 30-1 ......................................... 130-2 Blank ............................................. 1
KITS-1................................................... 1
KITS-2 Blank ........................................ 1BULK-1................................................. 1
Fig. 31 - 31-1 ......................................... 131-2 Blank ............................................. 1I-1 - I-22 ................................................ 1
G-1......................................................... 1G-2 - G-4 ............................................... 0
G-5......................................................... 1
G-6 Blank .............................................. 1H-1 - H-2 ............................................... 0
Index 1 ................................................... 0
Index 2 ................................................... 1
Index 3 - Index 6.................................... 0
Index 7 - Index 8.................................... 1
*Zero in this column indicates an original page.
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TECHNICAL MANUAL HEADQUARTERS
DEPARTMENT OF THE ARMY No. 9-2330-383-14&P Washington D. C., 13 December 1991
OPERATOR'S, UNIT, DIRECT SUPPORT,
AND GENERAL SUPPORT MAINTENANCE MANUAL
INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
FOR
TRAILER, AMMUNITION,HEAVY EXPANDED MOBILITY,
11 TON, M989A1 NSN 2330-01-275-7474 (EIC: CAG)
REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS
You can help improve this publication. If you find any mistakes or if you know of
a way to improve the procedures, please let us know. Submit your DA Form 2028(Recommended Changes to Equipment Publications), through the Internet, on the ArmyElectronic Product Support (AEPS) website. The internet address is
http://aeps.ria.army.mil. If you need a password, scroll down and click on ACCESSREQUEST FORM. The DA Form 2028 is located in the ONLINE FORMS PROCESSING section
of the AEPS. Fill out the form and click on SUBMIT. Using this form on the AEPSwill enable us to respond quicker to your comments and better manage the DA Form
2028 program. You may also mail, fax, or e-mail your letter or DA Form 2028direct to: AMSTA-LC-CI/TECH PUBS, TACOM-RI, 1 Rock Island Arsenal, Rock Island,
IL 61299-7630. The e-mail address is [email protected]. The faxnumber is DSN 793-0726 or Commercial (309) 782-0726.
Approved for public release; distribution is unlimited.
TABLE OF CONTENTS
Page Figure
CHAPTER 1 INTRODUCTION ............................... 1-1
Section I General Information ...................... 1-1
Section II Equipment Description .................... 1-3
CHAPTER 2 OPERATING INSTRUCTIONS ..................... 2-1
Section I Description and Use of Operator's Controls
and Indicators ........................... 2-1
Section II Operator Preventive Maintenance
Checks and Services (PMCS) ............... 2-8
Section III Operation Under Usual Conditions ........... 2-17
Section IV Operation Under Unusual Conditions ......... 2-39
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TABLE OF CONTENTS - CONT
Page Figure
CHAPTER 3 OPERATOR MAINTENANCE INSTRUCTIONS .......... 3-1
Section I Lubrication Instructions ................... 3-1Section II Operator Troubleshooting Procedures ........ 3-9
Section III Operator Maintenance Procedures ............ 3-13
CHAPTER 4 UNIT MAINTENANCE INSTRUCTIONS .............. 4-1
Section I Repair Parts, Special Tools, TMDE, and
Support Equipment ........................ 4-1
Section II Service Upon Receipt of Material ........... 4-2
Section III Unit Preventive Maintenance Checks and
Services (PMCS) .......................... 4-3
Section IV Unit Troubleshooting Procedures ............ 4-8
Section V Maintenance of Electrical System ........... 4-14
Section VI Maintenance of Front Axle .................. 4-24
Section VII Maintenance of Air Brake System ............ 4-28
Section VII Maintenance of Wheels and Tires ............ 4-56
Section IX Maintenance of Steering .................... 4-59
Section X Maintenance of Frame and Towing
Components ............................... 4-68
Section XI Maintenance of Springs and Shock
Absorbers ................................ 4-81
Section XII Maintenance of Body, Cab, Hood
and Hull ................................. 4-91
CHAPTER 5 DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS ................. 5-1
Section I Repair Parts, Special Tools,TMDE, and Support Equipment .............. 5-1
Section II Maintenance of Miscellaneous Components .... 5-2
Section III Preparation for Storage or Shipment ........ 5-17
APPENDIX A REFERENCES ................................. A-1
APPENDIX B MAINTENANCE ALLOCATION CHART ............... B-1
APPENDIX C COMPONENTS OF END ITEM AND BASIC ISSUE
ITEMS LISTS .............................. C-1
APPENDIX D ADDITIONAL AUTHORIZATION LIST .............. D-1
APPENDIX E EXPENDABLE/DURABLE SUPPLIES AND MATERIALS
LIST ..................................... E-1
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TABLE OF CONTENTS - CONT
Page Figure
APPENDIX F REPAIR PARTS AND SPECIAL TOOLS LIST ........ F-1
Section I INTRODUCTION ............................... F-1Section II REPAIR PARTS LIST .......................... 1-1
Group 06 Electrical System
0609 Lights
0609 Clearance Lights Serial Numbers
2000 and Below....................... 1-1 1
0609 Clearance Lights Serial Numbers
2001 and Up.......................... 1A-1 1A
0609 Composite Marker Lights ............... 2-1 2
0613 Hull or Chassis Wiring Harness
0613 Electrical Installation ............... 3-1 3
0613 Special Purpose Electrical Cable
Assembly ............................ 4-1 4
Group 10 Front Axle
1000 Front Axle Assembly1000 Front Axle . ........................... 5-1 5
1004 Steering and Leaning Wheel Mechanism
1004 Knuckle and Spindle Assembly .......... 6-1 6
Group 11 Rear Axle
1100 Rear Axle Assembly
1100 Rear Axle ............................. 7-1 7
Group 12 Brakes
1202 Service Brakes
1202 Front and Rear Brake Assembly Serial
Numbers 2000 and Below............... 8-1 8
1202 Front and Rear Brake Assembly Serial
Numbers 2001 and Up.................. 8A-1 8A
1206 Mechanical Brake System1206 Slack Adjuster ........................ 9-1 9
1208 Air Brake System
1208 Air Tank Installation ................. 10-1 10
1208 Air Valves ............................ 11-1 11
1208 Brake Valve, Gladhand, and Air Cleaner
Intake .............................. 12-1 12
1208 Air Chambers and Cable Clamps ......... 13-1 13
Group 13 Wheels and Tires
1311 Wheel Assembly
1311 Front and Rear Wheel Assembly ......... 14-1 14
1311 Wheel and Valve ....................... 15-1 15
1313 Tires, Tubes, and Tire Chains
1313 Tires.................................. 16-1 16
Group 14 Steering1401 Mechanical Steering Gear Assembly
1401 Tie Rod and Pivot Assembly ............ 17-1 17
Group 15 Frame, Towing Attachments, and Drawbars
and Articulation Systems
1501 Frame Assembly
1501 Trailer Assembly Components ........... 18-1 18
1503 Pintles and Towing Attachments
1503 Tow Bar Assembly ...................... 19-1 19
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TABLE OF CONTENTS - CONT
Page Figure
Group 16 Springs and Shock Absorbers
1601 Springs
1601 Front Leveling Valve and Air Bags ..... 20-1 20
1601 Rear Leveling Valve and Air Bags ...... 21-1 21
1604 Shock Absorber Equipment
1604 Shock Absorbers ........................ 22-1 22
1605 Torque, Radius, and Stabilizer Rods
1605 Front Suspension Assembly ............. 23-1 23
1605 Rear Suspension Assembly .............. 24-1 24
Group 18 Body, Cab, Hood, and Hull
1801 Body, Cab, Hood, and Hull Assemblies
1801 Side Panels ........................... 25-1 25
1805 Subfloors and Related Components
1805 Floor ................................. 26-1 26
1808 Stowage Racks, Boxes, Straps,
Carrying Cases, Cable Reels,
Hose Reels, etc.1808 Stowage Door Assembly ................. 27-1 27
Group 22 Body Chassis or Hull and Accessory Items
2202 Accessory Items
2202 Reflectors ............................ 28-1 28
2210 Data Plates and Instruction Holders
2210 Identification Plates ................. 29-1 29
Group 26 Tools and Test Equipment
2604 Special Tools (Repair Parts)
2604 Inserter, Bearing, and Bushing ........ 30-1 30
Group 94 Kits
9401 Kits................................... KITS-1 -
Group 95 General Use Standardized Parts
9501 Hardware Supplies and Bulk Materiel,
Common .............................. BULK-1 -
Section III SPECIAL TOOLS .............................. 31-1 -
Group 26 Tools and Test Equipment
2604 Special Tools ......................... 31-1 31
Section IV CROSS-REFERENCE INDEXES .................... I-1
NATIONAL STOCK NUMBER INDEX ................ I-1
PART NUMBER INDEX .......................... I-5
FIGURE AND ITEM NUMBER INDEX ............... I-14
APPENDIX G ILLUSTRATED LIST OF MANUFACTURED ITEMS ..... G-1
APPENDIX H TORQUE LIMITS............................... H-1
ALPHABETIC INDEX ........................... Index 1
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1 - 2
1 - 3 . D E S T R U CT I ON OF A RMY MA T E R I E L T O P R E VE N T E N E MY U S E
Re f e r t o TM 7 5 0 - 2 4 4 - 6 .
1 - 4 . REP ORTI NG EQUI P MENT I MP ROVEMENT RECOMMENDATI ONS ( EI R)
I f t h e HE MAT n e e d s i mp r o v e me n t , s e n d a n E I R. T h e u s e r c a n t e l l i f s o me t h i n g i n t h e
d e s i g n o r p e r f o r ma n c e c o u l d b e i mp r o v e d . Ma i l a n S F 3 6 8 ( Qu a l i t y D e f i c i e n c yRe p o r t ) t o U . S . A r my Ta n k A u t o mo t i v e Co mma n d A MS TA - MP , Wa r r e n , MI 4 8 3 9 7 - 5 0 0 0 . Wew i l l r e p l y .
1 - 5 . WA RR A NT Y
Re f e r t o TB- 9 - 2 3 3 0 - 3 8 3 - 1 4 f o r w a r r a n t y t e r ms .
1 - 6 . P REP ARATI ON F OR S TORAGE OR S HI P MENT
R e f e r t o c h a p t e r 5 , s e c t i o n I I I .
1 - 7 . S A F E T Y , C AR E , A ND HA ND L I N G
Re f e r t o TM 9 - 1 3 0 0 - 2 0 6 f o r g e n e r a l a mmu n i t i o n c a r e , h a n d l i n g , a n d s a f e t y .
1 - 8 . ME T R I C U NI T S
Me t r i c u n i t s a r e n o t u s e d i n t h i s p u b l i c a t i o n . A n E n g l i s h t o me t r i c c o n v e r s i o n
t a b l e i s i n c l u d e d o n t h e i n s i d e b a c k c o v e r o f t h i s p u b l i c a t i o n .
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Ch a n g e 1 1 - 3
S e c t i o n I I . E Q U I P ME N T D E S C R I P T I ON
1 - 9 . E Q UI P ME N T C HA R A CT E R I S T I CS , C A P A B I L I T I E S , A N D F E A T U R E S
a . T h e H E MA T i s a f o u r - w h e e l t r a i l e r o f l o w b o y d e s i g n w i t h a b o x - b e a m f r a me w i t hl a r g e t i r e s f o r o f f - r o a d c a p a b i l i t y . T h e c a r g o a r e a i s c o n s t r u c t e d o f s t e e l w i t h
s h i p l a p w o o d d e c k i n g . T h e f o r e a n d a f t d e c k s a r e r a i s e d a b o v e t h e c a r g o d e c k a n dc o n t a i n t h e s u s p e n s i o n a n d s t e e r i n g s y s t e ms .
b . T h e s u s p e n s i o n i s a n a i r - b a g t y p e s u s p e n s i o n f o r s mo o t h r i d i n g a n d o f f - r o a ds t a b i l i t y . T h e s t e e r i n g s y s t e m i s t h a t o f a n o r ma l f r o n t - wh e e l t r u c k s t e e r i n g
l i n k a g e a n d i s c o n t r o l l e d b y t h e t o w b a r a s s e mb l y .
c . T h e r a i s e d f o r e a n d a f t d e c k s a r e c o n s t r u c t e d w i t h t r e a d p l a t e t o mi n i mi z es l i p p i n g o r f a l l i n g w h e n w o r k i n g o n t h e d e c k s .
d . T h e s i d e p a n e l s a r e r e mo v a b l e f o r e a s i e r l o a d i n g f r o m e i t h e r s i d e .
e . T h e r e a r e f o u r c a r g o t i e d o w n r i n g s a t e a c h e n d o f t h e c a r g o d e c k a n d s e v e n o ne a c h s i d e . T h e r e a r e a l s o f o u r e v e n l y d i s t r i b u t e d ML R S p o d s t o p s l o c a t e d a t e a c h
c o r n e r o f t h e d e c k . T h e s e p o d s t o p s a r e r e mo v a b l e t o a l l o w o t h e r t y p e s o f c a r g o .
f . L i f t r i n g s a r e l o c a t e d f o r e a n d a f t o n e a c h s i d e o f t h e r a i s e d d e c k s t o a l l o w
t h e H E MA T t o b e s l i n g l o a d e d o r h e l i c o p t e r t r a n s p o r t e d . T h e r e a r e a l s o f o u r v e h i c l et i e d o w n s l o c a t e d a t e a c h c o r n e r o f t h e u n d e r d e c k f o r r a i l r o a d t r a n s p o r t i n g .
g . A s t o r a g e b o x l o c a t e d i n t h e b o x b e a m f r a me a t t h e r e a r o f t h e t r a i l e r i su s e d t o s t o r e t o o l b o x e s , p a r t s , a n d a c c e s s o r i e s f o r e x t e n d e d u s e o f t h e t r a i l e r .
h . T h e H E MA T w i l l n o r ma l l y b e t o w e d b y t h e M9 8 5 H e a v y E x p a n d e d Mo b i l i t y T a c t i c a l
T r u c k ( HE MT T ) . L o a d c a p a b i l i t y o f t h e H E MA T i s 2 2 , 0 0 0 p o u n d s o f mu n i t i o n s .
i . Th e t o w i n g v e h i c l e p r o v i d e s e l e c t r i c a l p o w e r t h r o u g h a n i n t e r v e h i c u l a r c a b l e
f o r t h e H E MA T c l e a r a n c e l i g h t s , b r a k e l i g h t s , a n d t u r n s i g n a l s .
j . Ai r i s a l s o s u p p l i e d f r o m t h e t o wi n g v e h i c l e t o t h e HE MAT a i r s y s t e m, wh i c h
i n c l u d e s t h r e e a i r t a n k s , a i r l i n e s , f o u r a i r s u s p e n s i o n b a g s , a n d t h e f o u r - w h e e la i r b r a k e s .
k . O n - b o a r d t r a i l e r e q u i p me n t i n c l u d e s a s p a r e t i r e , j a c k , j a c k s t a n d , l u gw r e n c h a n d h a n d l e , e i g h t t i e d o w n s t r a p s , a n d a f i r e e x t i n g u i s h e r . I n t e r v e h i c u l a r
e l e c t r i c a l c a b l e i s s t o r e d i n t h e s t o r a g e b o x w h e n n o t i n u s e . C h o c k s a r e p r o v i d e dt o s t a b i l i z e t h e t r a i l e r w h e n p a r k e d .
l . T h e t r a i l e r i s e q u i p p e d wi t h a n a i r h o s e f i t t i n g t o a l l o w u s e o f t h e HE MT Ta i r h o s e t o i n f l a t e t h e t i r e s . On o l d t r a i l e r s wi t h s e r i a l n u mb e r s 2 0 0 0 a n d b e l o w,
wi t h b i a s p l y t i r e s , a i r p r e s s u r e i n t i r e s s h o u l d b e l o we r e d f r o m 1 0 0 p s i f o r
h i g h w a y t r a v e l t o 6 5 p s i f o r o f f - r o a d t r a v e l . O n n e w t r a i l e r s w i t h s e r i a l n u mb e r s2 0 0 1 a n d u p , w i t h r a d i a l t i r e s , a i r p r e s s u r e i s 1 0 5 p s i u n d e r a l l t r a v e lc o n d i t i o n s , h i g h wa y a n d o f f - r o a d .
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1 - 4
1 - 1 0 . LOCATI ON AND DES CRI P TI ON OF MAJ OR COMP ONENTS
a . T o w b a r A s s e mb l y . T h e t o w b a r a s s e mb l y ( 1 ) i s u s e d f o r t o w i n g a n d s t e e r i n g t h e
HEMAT.
b . S a f e t y C h a i n s . T h e s a f e t y c h a i n s ( 2 ) a r e a t t a c h e d f r o m t h e H E MA T t o t h e
t o w i n g v e h i c l e t o p r e v e n t b r e a k a w a y s h o u l d t h e p i n t l e a n d t o w b a r s e p a r a t e d u r i n gu s e .
c . F r a me . T h e f r a me ( 3 ) i s c o n s t r u c t e d o f s t e e l w i t h a wo o d c a r g o d e c k . T h e
f r a me a l s o p r o v i d e s mo u n t i n g f o r t h e a x l e s a n d a i r s u s p e n s i o n s y s t e m.
d . Mu l t i p l e La u n c h Ro c k e t S y s t e m S h o e A s s e mb l y . Th e c a r g o d e c k h a s o n e r e mo v a b l e
ML R S p o d s t o p ( 4 ) i n e a c h o f t h e f o u r c o r n e r s .
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Ch a n g e 1 1 - 5
e . S p a r e T i r e a n d Mo u n t i n g A s s e mb l y . T h e s p a r e t i r e ( 5 ) i s s e c u r e d o n i t s mo u n t
wi t h t wo s t u d s a n d t wo l u g n u t s .
f . L i f t i n g E y e s . L i f t i n g e y e s ( 6 ) a r e l o c a t e d o n e a c h s i d e o f t h e f o r e a n d a f t
d e c k s . T h e y a r e u s e d t o s l i n g h o i s t o r h e l i c o p t e r t h e H E MA T .
g . R e f l e c t o r s . T h e r e a r ( r e d ) a n d f o r wa r d ( a mb e r ) r e f l e c t o r s ( 7 ) p r o v i d ea d d i t i o n a l v i s i b i l i t y o f t h e H EMA T.
h . L i g h t s . H E MA T l i g h t s i n c l u d e t h e r e a r ( r e d ) a n d f o r wa r d ( a mb e r ) c l e a r a n c e
l i g h t s ( 8 ) , a n d a l s o t h e mu l t i p u r p o s e c o mp o s i t e t a i l l i g h t s ( 9 ) . Th e c o mp o s i t e
t a i l l i g h t s ( 9 ) f u n c t i o n a s t u r n s i g n a l s a n d b r a k e l i g h t s . T h e y a l s o c a n b e d a r k e n e d
d u r i n g b l a c k o u t .
i . R u b b e r B u mp e r s . T h e t wo r u b b e r b u mp e r s ( 1 0 ) l o c a t e d a t t h e r e a r o f t h e
t r a i l e r p r e v e n t d a ma g e t o t h e H E MA T a n d t h e d e c k w h e n l o a d i n g a n d u n l o a d i n g o r
p a r k i n g .
j . C a r g o T i e d o w n R i n g s . T w e n t y - t wo t i e d o w n r i n g s ( 1 1 ) a r e l o c a t e d a r o u n d t h e
c a r g o d e c k t o s e c u r e c a r g o .
k . F i r e E x t i n g u i s h e r . A f i r e e x t i n g u i s h e r ( 1 2 ) i s l o c a t e d o n t h e f r o n t d e c k w a l l
a t a l l t i me s i n c a s e o f e me r g e n c y .
1 . S t o r a g e B o x . A s t o r a g e b o x ( 1 3 ) i s l o c a t e d a t t h e r e a r o f t h e t r a i l e r f o r
s t o r i n g t o o l s , j a c k , c a b l e , a n d o t h e r a c c e s s o r i e s .
m. S p l a s h G u a r d s . S p l a s h g u a r d s ( 1 4 ) a r e p r o v i d e d t o p r e v e n t d e b r i s h i t t i n g
v e h i c l e s b e h i n d t h e H E MA T . T h e r e a r e a l s o s p l a s h g u a r d s i n f r o n t t o p r o t e c t t h e
f r o n t a i r b a g s .
n . E l e c t r i c a l C a b l e C o n n e c t o r . T h e e l e c t r i c a l c a b l e c o n n e c t o r ( 1 5 ) i s t h e H E MA T
r e c e p t a c l e f o r t h e i n t e r v e h i c u l a r c a b l e , w h i c h p r o v i d e s 2 4 v o l t d c p o w e r f o r t h e
HEMAT l i g h t s .
o . A i r S u s p e n s i o n S y s t e m. T h e a i r s u s p e n s i o n s y s t e m ( 1 6 ) c o n s i s t s o f f o u r a i r
b a g s ( t wo f r o n t a n d t w o r e a r ) s u p p o r t e d b y t h e a x l e s u s p e n s i o n s y s t e ms .
p . A i r B r a k e s . T h e H E MA T a i r b r a k e s ( 1 7 ) a r e c o n t r o l l e d b y t h e t o w i n g v e h i c l e
t h r o u g h i n t e r v e h i c u l a r a i r h o s e s t o t h e H EMA T a i r b r a k e s y s t e m.
q . Ai r Ho s e s . T w o a i r h o s e s ( 1 8 ) p r o v i d e a i r f r o m t h e t o wi n g v e h i c l e f o r
o p e r a t i o n o f t h e H EMA T b r a k e s .
r . S i d e P a n e l s . T h e f o u r s i d e p a n e l s , o n e s h o r t ( 1 9 ) a n d o n e l o n g ( 2 0 ) o n e a c hs i d e , a r e r e mo v a b l e .
s . Ai r Ho s e F i t t i n g ( Un d e r T r a i l e r ) . A f i t t i n g ( 2 1 ) i s s u p p l i e d f o r u s e i n
c o n n e c t i n g t h e HE MT T a i r h o s e . T h e h o s e i s t h e n u s e d t o i n f l a t e t h e HE MAT t i r e s .
t . B r a k e C o n t r o l Va l v e ( U n d e r T r a i l e r ) . A b r a k e c o n t r o l v a l v e ( 2 2 ) i s u s e d t o
r e l e a s e s p r i n g b r a k e s w h e n a n a i r s u p p l y f o r t h e a i r b r a k e s i s n o t a v a i l a b l e .
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1 - 6 Ch a n g e 1
1 - 1 0 . LOCATI ON AND DES CRI P TI ON OF MAJ OR COMP ONENTS ( CONT)
u . A c c e s s S t e p s ( Cu r b s i d e ) . O n e f o l d a b l e a c c e s s s t e p ( 2 3 ) i s mo u n t e d i n s i d e t h e
c u r b s i d e s h o r t s i d e p a n e l a n d t wo f o l d a b l e a c c e s s s t e p s ( 2 4 a n d 2 5 ) a r e mo u n t e d o nt h e f r o n t b u l k h e a d , c u r b s i d e , a n d a h a n d l e ( 2 6 ) i s mo u n t e d o n t h e f r o n t b u l k h e a dc u r b s i d e a b o v e t h e s t e p s , t o p e r mi t r e a d y a c c e s s t o t h e f r o n t d e c k a r e a w h e n H E MA T
i s l o a d e d .
1 - 1 1 . E Q UI P ME N T D A T A
Di me n s i o n sH e i g h t ( e mp t y ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7 i n . t o t o p o f s i d e r a i l
7 2 i n . o v e r s p a r e t i r e3 4 i n . t o t o p o f f l o o r
L e n g t h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 0 9 i n .Wi d t h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 8 . 4 i n .G r o u n d c l e a r a n c e ( e mp t y ) . . . . . . . . . . . . . . . . . . . 1 4 . 7 i n . , f r o n t a x l e , b i a s p l y
t i r e s1 4 . 4 i n . , f r o n t a x l e , r a d i a l t i r e s2 0 . 2 i n . , b o x b e a m, a l l t i r e s
We i g h tE m p t y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 , 0 0 0 l b sP a y l o a d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 , 0 0 0 l b s
T i r e sS i z e
B i a s p l y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 x 2 2 . 5R a d i a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 5 / 6 5 R 2 2 . 5
I n f l a t i o n p r e s s u r eB i a s p l y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 0 p s i h i g h w a y / 6 5 p s i o f f - r o a dR a d i a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 5 p s i
P l i e s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 , s i d e w a l l s1 1 , t r e a d
T r e a d d e s i g n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T r a c t i o n r o a d l u g
Ax l e sMa n u f a c t u r e r
F r o n t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . We s t p o r t A x l eR e a r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S y s t e ms & E l e c t r o n i c s I n c .
C a p a c i t y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6 , 9 0 0 l b s , f r o n t a n d r e a r
Br a k e s y s t e mT y p e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S t r a i g h t a i r
Br a k e sMa n u f a c t u r e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E a t o nT y p e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dr u m 1 6 - 1 / 2 x 5 i n .
S u s p e n s i o nMa n u f a c t u r e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R i d e w e l lA i r b a g s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F i r e s t o n e
E l e c t r i c a l s y s t e m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 Vd cNe g a t i v e g r o u n d
F i r e e x t i n g u i s h e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A me r e x C o r p .Dr y c h e mi c a l
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1 - 1 2 . D AT A P L A TE S
T h e f o l l o w i n g d a t a p l a t e s a r e r i v e t e d t o t h e t r a i l e r .
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1 - 8 Ch a n g e 1
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1 - 1 0 Ch a n g e 1
1 - 1 2 . D AT A P L A T ES ( C ON T )
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1 - 1 3 . S T E N CI L S
T h e f o l l o w i n g s t e n c i l s a r e p a i n t e d o n t h e t r a i l e r .
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C HA P T E R 2
OP ERAT I NG I NS TRUCT I ONS
P a g eO v e r v i e w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1
D e s c r i p t i o n a n d U s e o f O p e r a t o r ' s Co n t r o l s a n d I n d i c a t o r s . . . . . . . . . . . . . . 2 - 1
Op e r a t o r P r e v e n t i v e Ma i n t e n a n c e Ch e c k s a n d S e r v i c e s ( P MCS ) . . . . . . . . . . . . . 2 - 8
O p e r a t i o n U n d e r U s u a l Co n d i t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1 7O p e r a t i o n U n d e r U n u s u a l Co n d i t i o n s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3 9
OVERVI EW
Th i s c h a p t e r p r o v i d e s o p e r a t o r i n s t r u c t i o n s f o r t h e o p e r a t i o n a n d ma i n t e n a n c e o f t h e H e a v y Ex p a n d e d Mo b i l i t y A mmu n i t i o n Tr a i l e r ( HEMA T) a n d i t s c o mp o n e n t s . AP r e v e n t i v e Ma i n t e n a n c e Ch e c k s a n d S e r v i c e s ( P MCS ) c h a r t i s p r o v i d e d a s a g u i d e l i n e .
A l s o , o p e r a t i n g p r o c e d u r e s f o r b o t h u s u a l a n d u n u s u a l c o n d i t i o n s a r e i n c l u d e d .
S e c t i o n I . D E S C RI P T I ON A N D U S E OF OP E R A T OR ' S C ON T ROL S A ND I N DI C AT O RS
2 - 1 . L I GH T I N G S Y S T E M
a . L i g h t s . T h e t r a i l e r l i g h t s a r e o p e r a t e d b y t h e t o w i n g v e h i c l e t h r o u g h t h e
i n t e r v e h i c u l a r e l e c t r i c c a b l e . L i g h t s i n c l u d e t h e f o l l o w i n g :
( 1 ) T w o r e a r c o mp o s i t e l i g h t s ( 1 ) , e a c h c o n t a i n i n g a s t o p l i g h t , t u r n s i g n a ll i g h t , a b l a c k o u t s t o p l i g h t , b l a c k o u t ma r k e r l i g h t , a n d t a i l l i g h t .
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2 - 2
2 - 1 . L I GH T I N G S Y S T E M ( C ON T )
( 2 ) T wo r e a r r e d ma r k e r r e f l e c t o r s ( 2 ) .
( 3 ) T h r e e r e a r r e d ma r k e r l i g h t s ( 3 ) .
( 4 ) T wo r e d r e a r s i d e l i g h t s ( 4 ) l o c a t e d l e f t a n d r i g h t . T wo r e d r e f l e c t o r s( 5 ) l o c a t e d r i g h t a n d l e f t .
( 5 ) T w o a mb e r r e f l e c t o r s ( 6 ) a n d t wo a mb e r c l e a r a n c e ma r k e r l i g h t s ( 7 )l o c a t e d o n l e f t a n d r i g h t s i d e s o f t r a i l e r f r o n t .
( 6 ) T w o a mb e r l i g h t s ( 8 ) a n d t wo a mb e r r e f l e c t o r s ( 9 ) l o c a t e d o n f r o n t e n d
o f H EMA T.
b . I n t e r v e h i c u l a r C a b l e . T h e i n t e r v e h i c u l a r c a b l e ( 1 ) i s u s e d t o c o n n e c t t h e
t r a i l e r l i g h t i n g s y s t e m t o t h e t o w i n g v e h i c l e e l e c t r i c a l s y s t e m d u r i n g t o w i n go p e r a t i o n s . T h e c a b l e p l u g s a r e k e y e d s o t h a t t h e y c a n o n l y b e c o n n e c t e d t o t h e
t r a i l e r c o n n e c t o r a n d t h e t o w i n g v e h i c l e c o n n e c t o r s i n o n e w a y . T h e l i g h t s a r eo p e r a t e d f r o m t h e t o w i n g v e h i c l e . Wh e n n o t i n u s e , t h e c a b l e i s s t o w e d i n t h e
s t o r a g e b o x .
2 - 2 . AI R S YS TEM
Th e p n e u ma t i c s y s t e m i s a s t a n d a r d t w o - l i n e a i r b r a k e s y s t e m w h i c h i n c l u d e s
e me r g e n c y a n d p a r k i n g b r a k e f e a t u r e s . Th e s y s t e m i s p r e s s u r i z e d b y t h e t r a c t o rt h r o u g h t h e e me r g e n c y ( s u p p l y ) a i r l i n e ( 1 ) , g l a d h a n d ( 2 ) , a n d a i r c l e a n e r ( 3 ) t o
t h e l e f t r e a r ( 4 ) , r i g h t r e a r ( 5 ) , a n d r i g h t f r o n t a i r r e s e r v o i r ( 6 ) , wh e r e a i r i ss t o r e d . A i r p r e s s u r e i s a u t o ma t i c a l l y a p p l i e d t o t h e r e a r s p r i n g b r a k e s ( 7 ) t or e l e a s e t h e m f o r n o r ma l o p e r a t i o n . Wh e n a n y o f t h e b r a k e c o n t r o l s o n t h e t r a c t o r
a r e a c t i v a t e d , p r e s s u r e i s p r o v i d e d f r o m t h e t r a c t o r t h r o u g h t h e s e r v i c e ( c o n t r o l )a i r l i n e ( 8 ) , g l a d h a n d ( 9 ) , a n d a i r c l e a n e r ( 1 0 ) t o t wo r e l a y v a l v e s ( 1 1 ) , w h i c h
r e l e a s e a i r p r e s s u r e f r o m r e s e r v o i r s ( 4 , 5 , a n d 6 ) t o o p e r a t e f o u r s e r v i c e b r a k e s( 1 2 ) f o r n o r ma l t r a i l e r b r a k i n g a n d p a r k i n g b r a k e o p e r a t i o n s . F r o m t h e t h r e er e s e r v o i r s , a i r i s a l s o s u p p l i e d t o t h e l e f t f r o n t ( 1 3 ) , r i g h t f r o n t ( 1 4 ) , a n d r e a r
l e v e l i n g v a l v e ( 1 5 ) , w h i c h p r e s s u r i z e t h e f o u r a i r s u s p e n s i o n b a g s ( 1 6 ) . I f a i rp r e s s u r e d r o p s b e l o w a p p r o x i m a t e l y 6 0 p s i , t h e p r e s s u r e p r o t e c t i o n v a l v e ( 1 7 ) c u t s
o f f a i r t o l e v e l i n g v a l v e s ( 1 3 , 1 4 , a n d 1 5 ) , l e a v i n g a i r p r e s s u r e t o o p e r a t e t h es e r v i c e b r a k e s o n l y . I f t h e r e i s a ma j o r c o mp o n e n t f a i l u r e o r l i n e r u p t u r e i n t h e
s y s t e m, o r t h e t r a i l e r i s d i s c o n n e c t e d f r o m t h e t r a c t o r , t h e mu l t i f u n c t i o n v a l v e( 1 8 ) d i s a b l e s b o t h r e l a y v a l v e s ( 1 1 ) a n d r e l e a s e s a i r f r o m t h e r e a r s p r i n g b r a k ec h a mb e r s , a p p l y i n g t h e r e a r s p r i n g b r a k e s ( 7 ) . T h e r e a r s p r i n g b r a k e s ( 7 ) c a n b e
r e l e a s e d b y p u s h i n g t h e k n o b i n w a r d o n t h e b r a k e c o n t r o l v a l v e ( 1 9 ) , o r b yc o n n e c t i n g t h e t r a i l e r t o t h e t r a c t o r a n d r e c h a r g i n g t h e a i r s y s t e m. I f t h e s y s t e m
h a s n o a i r p r e s s u r e , r e a r s p r i n g b r a k e s c a n b e ma n u a l l y r e l e a s e d b y c a g i n g .
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2 - 3
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2 - 3 . A I R B R A KE A N D S U S P E N S I ON S Y S T E M
a . S e r v i c e Br a k e s . Th e s e r v i c e b r a k e s a r e e x p a n d i n g s h o e - o n - d r u m t y p e b r a k e s .
Th e b r a k e s h o e s a r e a c t u a t e d b y i n d i v i d u a l a i r c h a mb e r s t h r o u g h c a ms h a f t s . Th e a i rc h a mb e r s a r e c o n n e c t e d t o t h e a i r s y s t e m t a n k s a n d v a l v e s t h r o u g h a i r h o s e s . T h er e a r b r a k e s a r e n o r ma l l y a u t o ma t i c a l l y l o c k e d a s p a r k i n g b r a k e s w h e n t h e t r a i l e r i s
d i s c o n n e c t e d f r o m t h e t o w i n g v e h i c l e . T o u n l o c k t h e r e a r b r a k e s , p u s h i n o n t h ec o n t r o l v a l v e k n o b ( 1 ) . I f t h e r e i s n o t e n o u g h a i r i n t h e a i r t a n k , t h e c o n t r o l
v a l v e k n o b wi l l p o p b a c k o u t a n d t h e r e a r b r a k e s wi l l r e ma i n l o c k e d . I f t h e b r a k e sc a n n o t b e r e l e a s e d w i t h t h e c o n t r o l v a l v e , r e f e r t o p a r a . 3 - 6 a n d me c h a n i c a l l y
r e l e a s e t h e b r a k e s b y c a g i n g t h e s p r i n g b r a k e c h a mb e r .
b . I n t e r v e h i c u l a r A i r H o s e s . A i r f o r o p e r a t i o n o f t h e t r a i l e r b r a k e s i s p r o v i d e df r o m t h e t o w i n g v e h i c l e t h r o u g h t w o i n t e r v e h i c u l a r a i r h o s e s ( 2 ) a t t a c h e d t o t h e
f r o n t o f t h e t r a i l e r . T h e h o s e s a r e f o r s e r v i c e b r a k e o p e r a t i o n a n d f o r t h e
e me r g e n c y s y s t e m. Bo t h h o s e s h a v e g l a d h a n d c o u p l i n g s ( 3 ) f o r q u i c k s e c u r ec o n n e c t i o n t o t h e t o w v e h i c l e .
c . S u s p e n s i o n S y s t e m. Th e t r a i l e r s u s p e n s i o n s y s t e m i n c l u d e s f r o n t a n d r e a rs y s t e ms . T h e f r o n t s u s p e n s i o n s y s t e m h a s l e f t a n d r i g h t s i d e a i r - b a g s p r i n g s ( 1 )
a n d s h o c k s ( 2 ) a t t a c h e d t o h a n g e r ( 3 ) a n d s h o c k b r a c k e t s ( 4 ) . T h e i l l u s t r a t i o ns h o w n i s f o r t h e l e f t s i d e . T h e r e a r s u s p e n s i o n s y s t e m c o n s i s t s o f r i g h t a n d l e f ta i r - b a g s p r i n g s ( 1 ) a n d s h o c k s ( 2 ) a t t a c h e d t o h a n g e r ( 3 ) a n d s h o c k b r a c k e t s ( 4 ) .
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2 - 5
2 - 4 . T OWB A R A ND S A F E T Y C HA I N S
a . T o w b a r . T h e t o wb a r a s s e mb l y ( 1 ) i s u s e d t o c o n n e c t t h e t r a i l e r t o t h e t o wv e h i c l e f o r t r a n s p o r t i n g . I t i s c o n n e c t e d t o t h e t r a i l e r t i e r o d f o r s t e e r i n g . T h et o wb a r c a n b e h e l d i n p l a c e o n t h e t r a i l e r b y a l o c k p i n w h e n b a c k i n g o r p a r k i n g t h e
t r a i l e r .
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2 - 6
2 - 4 . T OWB A R A ND S A F E T Y C HA I N S ( C ON T )
b . S a f e t y C h a i n s . T h e t wo s a f e t y c h a i n s ( 2 ) a r e a t t a c h e d j u s t r i g h t a n d l e f t o f
t h e t o wb a r o n t h e f r o n t e n d o f t h e f r a me . T h e i r p u r p o s e i s t o p r e v e n t b r e a k a wa y i nt h e e v e n t o f t o w b a r f a i l u r e o r p i n t l e d i s c o n n e c t . T h e c h a i n s a r e h o o k e d t o t h et o w i n g v e h i c l e a f t e r t h e t o w b a r h a s b e e n c o n n e c t e d .
2 - 5 . S P A R E T I R E MOU NT
T h e t r a i l e r s p a r e t i r e i s l o c a t e d c e n t e r o n t h e f o r w a r d d e c k a n d s e c u r e d wi t h t wo
s t u d s ( 1 ) , c a p n u t s ( 2 ) , l i f t i n g p l a t e ( 3 ) , a n d t wo l u g n u t s ( 4 ) .
2 - 6 . D AV I T C R AN E MOU NT
T h e d a v i t c r a n e mo u n t ( 1 ) i s l o c a t e d s t r e e t s i d e o n t h e f o r wa r d b u l k h e a d a n d i s u s e dt o mo u n t t h e d a v i t h o i s t a r m f r o m t h e HE MT T . Wh e n t h e HE MT T d a v i t i s mo u n t e d i n
t h i s l o c a t i o n , i t c a n b e u s e d t o l i f t t h e s p a r e t i r e a n d t o wb a r .
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2 - 7
2 - 7 . S T E E RI N G
a . T h e t r a i l e r s t e e r i n g i s c o n t r o l l e d b y t h e t o wb a r a s s e mb l y ( 1 ) wh i c h i sc o n n e c t e d t o t h e t r a i l e r t i e r o d a n d s t e e r i n g a s s e mb l y ( 2 ) .
b . Wh e n t h e t r a i l e r i s b e i n g b a c k e d u p , t h e t o w b a r a s s e mb l y i s n o r ma l l y p i n n e di n p l a c e s o t h a t t h e f r o n t w h e e l s a r e l o c k e d i n a s t r a i g h t - a h e a d p o s i t i o n .
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2 - 8
2 - 8 . S T OR AGE B OX
T h e t r a i l e r s t o r a g e b o x i s l o c a t e d a t t h e r e a r o f t h e t r a i l e r b e t we e n t h e t wo d o c k
b u mp e r s . T h e s t o r a g e b o x i s u s e d t o s t o w i n t e r v e h i c u l a r c a b l e w h e n i t i s n o t b e i n gu s e d , a s we l l a s t o s t o w t h e c h o c k s , j a c k , l u g wr e n c h , a n d o t h e r t o o l s a s r e q u i r e d .
2 - 9 . F I R E E X T I N GU I S HE R
T h e f i r e e x t i n g u i s h e r i s a s t a n d a r d 1 0 B C t y p e . I t i s mo u n t e d o n t h e l e f t s i d e o f t h e f o r wa r d d e c k wa l l n e x t t o t h e s p a r e t i r e . I t i s h e l d i n p l a c e wi t h a q u i c k -
r e l e a s e b r a c k e t .
2 - 1 0 . L I F T I N G E Y E S
T h e f o u r l i f t i n g e y e s a r e l o c a t e d l e f t a n d r i g h t o n t h e f o r wa r d a n d r e a r d e c k s . T h el i f t i n g e y e s a r e u s e d t o l i f t t h e t r a i l e r .
2 - 1 1 . S I D E P A N E L S
T h e r e a r e t wo s i d e p a n e l s 2 3 i n c h e s h i g h o n e a c h s i d e o f t h e t r a i l e r , o n e 7 9 - 3 / 4
i n c h e s l o n g a n d t h e o t h e r 9 5 - 3 / 4 i n c h e s l o n g . Wh e n i n s t a l l e d , t h e y a r e t h e s a meh e i g h t a s t h e f o r wa r d a n d r e a r d e c k s u p p o r t s . T h e t wo s h o r t p a n e l s a r e d r i l l e d t omo u n t t h e f o l d a b l e a c c e s s s t e p s .
S e c t i o n I I . O P E R A T OR P R E V E N T I V E MA I N T E N A N CE C HE C K S A N D S E R V I C E S ( P MC S )
2 - 1 2 . MA I N T E N A N CE F O RMS A N D R E C OR D S
E v e r y mi s s i o n b e g i n s a n d e n d s wi t h t h e p a p e r wo r k . T h e r e i s n ' t mu c h o f i t , b u t y o uh a v e t o k e e p i t u p . T h e f o r ms a n d r e c o r d s y o u f i l l o u t h a v e s e v e r a l u s e s . T h e y a r e
a p e r ma n e n t r e c o r d o f t h e s e r v i c e s , r e p a i r s , a n d mo d i f i c a t i o n s ma d e o n y o u rv e h i c l e . T h e y a r e r e p o r t s t o u n i t ma i n t e n a n c e a n d t o y o u r C o mma n d e r . A n d t h e y a r e a
c h e c k l i s t f o r y o u wh e n y o u w a n t t o k n o w wh a t wa s wr o n g wi t h t h e v e h i c l e a f t e r i t sl a s t u s e , a n d w h e t h e r t h o s e f a u l t s h a v e b e e n f i x e d . F o r t h e i n f o r ma t i o n y o u n e e d o nf o r ms a n d r e c o r d s , s e e D A P A M 7 3 8 - 7 5 0 .
2 - 1 3 . O P E R A T OR P R E V E N T I V E MA I N T E N A N CE C HE C K S A N D S E R V I C E S ( P MC S )
a . T a b l e 2 - 1 l i s t s t h e n e c e s s a r y P MCS . P e r f o r m a t t h e i n t e r v a l s s h o w n b e l o w :
( 1 ) D o y o u r b e f o r e ( B) P R E VE N T I VE MAI NT E N AN CE j u s t b e f o r e y o u o p e r a t e t h e
v e h i c l e . P a y a t t e n t i o n t o t h e CA UTI O NS a n d WA RNI NG S .
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Ch a n g e 1 2 - 9
( 2 ) D o y o u r d u r i n g ( D) P R E V E N T I V E MA I N T E N AN C E d u r i n g o p e r a t i o n . ( Du r i n g
o p e r a t i o n me a n s t o mo n i t o r t h e v e h i c l e s a n d t h e i r r e l a t e d c o mp o n e n t s w h i l e t h e y a r e
a c t u a l l y b e i n g o p e r a t e d . )
( 3 ) Do y o u r a f t e r ( A ) P R E VE N T I VE MAI NT E N ANC E r i g h t a f t e r o p e r a t i n g t h ev e h i c l e . P a y a t t e n t i o n t o t h e CA UTI O NS a n d WA RNI NG S .
( 4 ) D o y o u r w e e k l y ( W) P R E V E N T I V E MA I N T E N AN C E w e e k l y .
b . I f s o me t h i n g d o e s n ' t w o r k , t r o u b l e s h o o t i t w i t h t h e i n s t r u c t i o n s i n t h i sma n u a l a n d n o t i f y y o u r s u p e r v i s o r .
c . Al w a y s d o y o u r P R E VE N T I VE MAI NT E N ANC E i n t h e s a me o r d e r s o i t g e t s t o b e a
h a b i t . O n c e y o u ' v e h a d s o me p r a c t i c e , y o u ' l l s p o t a n y t h i n g w r o n g i n a h u r r y .
d . I f a n y t h i n g l o o k s wr o n g a n d y o u c a n ' t f i x i t , wr i t e i t o n y o u r DA F o r m 2 4 0 4 .
I f y o u f i n d s o me t h i n g s e r i o u s l y w r o n g , r e p o r t i t t o u n i t ma i n t e n a n c e R I GH T N OW.
e . Wh e n y o u d o y o u r P R E V E NT I VE MA I N T E NA NC E , t a k e a l o n g t h e t o o l s y o u n e e d t oma k e a l l t h e c h e c k s . Yo u a l wa y s n e e d a r a g o r t wo .
________
WARN I N G
D r y c l e a n i n g s o l v e n t ( MI L- P RF - 6 8 0 , t y p e I ) i s e x t r e me l y f l a mma b l e ,t o x i c , a n d i s a n i r r i t a n t t o t h e e y e s , s k i n , a n d r e s p i r a t o r y s y s t e m. Don o t u s e n e a r o p e n f l a me o r e x c e s s i v e h e a t . D o n o t b r e a t h e t h e v a p o r s .
U s e s k i n a n d e y e p r o t e c t i o n a n d w o r k i n a w e l l v e n t i l a t e d a r e a . F l a s hp o i n t o f s o l v e n t i s 1 4 0 F .
( 1 ) C l e a n i n g . Di r t , g r e a s e , o i l , a n d d e b r i s o n l y g e t i n t h e wa y a n d ma yc o v e r u p a s e r i o u s p r o b l e m. C l e a n a s y o u w o r k a n d a s n e e d e d . U s e d r y c l e a n i n g
s o l v e n t ( MI L- P RF - 6 8 0 , t y p e I ) ( i t e m 6 , a p p e n d i x E) o n a l l me t a l s u r f a c e s . U s e s o a pa n d w a t e r w h e n y o u c l e a n r u b b e r o r p l a s t i c ma t e r i a l .
( 2 ) B o l t s , N u t s , a n d S c r e w s . C h e c k t h e m a l l f o r o b v i o u s l o o s e n e s s , mi s s i n g ,
b e n t , o r b r o k e n c o n d i t i o n . Y o u c a n ' t t r y t h e m a l l wi t h a t o o l , o f c o u r s e ; b u t l o o k
f o r c h i p p e d p a i n t , b a r e me t a l o r r u s t a r o u n d b o l t h e a d s . I f y o u f i n d o n e y o u t h i n ki s l o o s e , t i g h t e n i t , o r r e p o r t i t t o u n i t ma i n t e n a n c e i f y o u c a n ' t t i g h t e n i t .
( 3 ) We l d s . L o o k f o r l o o s e o r c h i p p e d p a i n t , r u s t o r g a p s w h e r e p a r t s a r ew e l d e d t o g e t h e r . I f y o u f i n d a b a d w e l d , r e p o r t i t t o u n i t ma i n t e n a n c e .
( 4 ) E l e c t r i c a l Wi r e s a n d C o n n e c t o r s . L o o k f o r c r a c k e d o r b r o k e n i n s u l a t i o n ,
b a r e w i r e s a n d l o o s e o r b r o k e n c o n n e c t o r s . T i g h t e n l o o s e c o n n e c t o r s a n d ma k e s u r et h e w i r e s a r e i n g o o d s h a p e .
( 5 ) A i r Ho s e L i n e s . L o o k f o r we a r , d a ma g e a n d l e a k s , a n d ma k e s u r e c l a mp sa n d f i t t i n g s a r e t i g h t . I f a l e a k c o me s f r o m a l o o s e f i t t i n g o r c o n n e c t o r , t i g h t e n
i t . I f s o me t h i n g i s b r o k e n o r wo r n o u t , r e p o r t i t t o u n i t ma i n t e n a n c e .
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2 - 1 0
2 - 1 3 . O P E R A T OR P R E V E N T I V E MA I N T E N A N CE C HE C K S A N D S E R V I C E S ( P MC S ) ( CO NT )
Ta b l e 2 - 1 . O p e r a t o r P r e v e n t i v e Ma i n t e n a n c e Ch e c k s a n d S e r v i c e s ( P MCS )
NOTE
Wi t h i n t h e d e s i g n a t e d i n t e r v a l , t h e s e c h e c k s a r e t o b e p e r f o r me d i n t h eo r d e r l i s t e d .
B - Be f o r e D - Du r i n g A - Af t e r W - We e k l y
I n t e r v a lI t e mNo . B D A W
I T E M T O B E I NS P E C T E DP r o c e d u r e : C h e c k f o r a n d h a v e
r e p a i r e d , f i l l e d , o r a d j u s t e da s n e e d e d .
Eq u i p me n t I s N o t
Re a d y / Av a i l a b l e I f :
NOTE
P e r f o r m w e e k l y ( W) P MC S a s w e l l a s
b e f o r e i f :
Y o u a r e t h e a s s i g n e d o p e r a t o rb u t h a v e n o t o p e r a t e d v e h i c l e
s i n c e t h e l a s t i n s p e c t i o n o ry o u a r e o p e r a t i n g t h e v e h i c l e
f o r t h e f i r s t t i me .
P e r f o r m t h e f o l l o wi n g i n s p e c t i o n /
c h e c k s b e f o r e c o n n e c t i n g t h e t r a i l e rt o t h e t o w i n g v e h i c l e .
1 I NT E RVE HI CUL AR CABL E
Ch e c k i n t e r v e h i c u l a r c a b l e ( 1 ) f o r
c u t s , b r e a k s , a n d f r a y e d w i r e s o rd a ma g e d c a b l e p l u g s , a n d mi s s i n g ,
b r o k e n , o r b e n t p i n s .
2 I NT E RVE HI CUL AR AI R HOS E S
a . Ch e c k p r e f o r me d p a c k i n g ( 1 ) .
I f d e f e c t i v e , n o t i f y u n i tma i n t e n a n c e .
b . Ch e c k i n t e r v e h i c u l a r a i r h o s e s
( 2 ) f o r c u t s , b r e a k s , a n d d a ma g e d
g l a d h a n d ( 3 ) . I f d a ma g e d , n o t i f yu n i t ma i n t e n a n c e .
A i r h o s e i s d a ma g e d o r
mi s s i n g . Gl a d h a n d
mi s s i n g , d a ma g e d , o rmi s s i n g t h e p a c k i n g .
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TM 9 - 2 3 3 0 - 3 8 3 - 1 4 &P
2 - 1 1
Ta b l e 2 - 1 . Op e r a t o r P r e v e n t i v e Ma i n t e n a n c e
Ch e c k s a n d S e r v i c e s ( P MCS ) - CO NT
NOTE
Wi t h i n t h e d e s i g n a t e d i n t e r v a l , t h e s e c h e c k s a r e t o b e p e r f o r me d i n t h e
o r d e r l i s t e d .
B - Be f o r e D - Du r i n g A - Af t e r W - We e k l y
I n t e r v a lI t e m
No . B D A W
I T E M T O B E I NS P E C T E D
P r o c e d u r e : C h e c k f o r a n d h a v er e p a i r e d , f i l l e d , o r a d j u s t e d
a s n e e d e d .
Eq u i p me n t I s N o tRe a d y / Av a i l a b l e I f :
3 AI R T ANKS
a . I n s p e c t a l l t h r e e a i r t a n k s f o r
d a ma g e a n d l e a k a g e .
D a ma g e d t a n k s o r a i r
l e a k s f r o m t a n k s .
________
WARN I N G
We a r p r o t e c t i v e g o g g l e s wh e n
o p e n i n g d r a i n c o c k a n d a v o i d t h ea i r s t r e a m. F a i l u r e t o d o s o
c o u l d r e s u l t i n p e r s o n a l i n j u r y .
b . Op e n d r a i n c o c k s o n a i r t a n k s t o
d r a i n c o n d e n s a t i o n .
c . C l o s e d r a i n c o c k .
4 AI R BRAKE S YS T E M
a . Wh i l e a h e l p e r a c t i v a t e s s e r v i c e
b r a k e s , l i s t e n f o r a i r l e a k s a tg l a d h a n d s , a i r v a l v e s , a n d t a n k s ,a n d i n s p e c t l i n e s f o r l o o s e
c o n n e c t i o n s a n d d a ma g e . Re p o r td e f i c i e n c i e s t o u n i t ma i n t e n a n c e .
A i r i s l e a k i n g . S e r v i c e
b r a k e s d o n o t o p e r a t e .
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TM 9 - 2 3 3 0 - 3 8 3
