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LEFTREAR
RIGHTREAR
48A
X
X
X
AETA VALVE
R
L
TANK GP(MAKE-UP)
VALVE GP-BRAKE (RETRACT)
ADJUSTER GP-SLACK
BRAKE GP(REAR)
LOCK-UPVALVE
P
PS
D
PUMP GP-CONV(BRAKE RETRACT)
BRAKE GP(REAR)
X
X
D37168
TO TANK (769D) (771D)TO BRAKE OIL COOLER (773D) (775D)
ELECTRONICCONTROLGROUP
MANUAL/AUTOSWITCHPANEL
MAGNETIC SWITCH AS.
10
9
8
7
5
3
12
4
6
STEERINGWHEEL
CRCL
M
BATTERY
D37169
1 Steering Hydraulic Tank Group
2 Steering Hydraulic Tank Filter
3 Steering Gear Pump
4 Electric Supplemental Steering Pump
5 Flow Control Valve Group
6 Flow Switch Assembly
7 Check Valve Group
8 Metering Pump Group
9 Relief Valve Group For Steering Cylinders
10 Steering Cylinder Group
Steering Hydraulic SystemMachine Location
Item No. Component Description
SENR8608October 1995
769D & 773D Trucks
Hydraulic System
769D:
5TR1-UP
771D
6JR1-UP
773D:
7ER1-UP
775D:
6KR1-UP
771D & 775D Quarry Trucks
©1995 CaterpillarAll Rights Reserved
Printed in U.S.A.
47
49
14
14
RIGHTREAR
18
46
111213
16
45
LEFTREAR
30
PUMPDRIVE
BOX
26
37
19
38
38
44
43
17
35
33
3223
36
27
21 20
M
24
CONVERTER
TORQUE
LOCK-UPVALVE
4 3 2 1
F
E
D
5678
F
E
D
C
B
A
4 3 2 1
C
B
A
8 7 6 5
TRANS.
HYDCONT.
40
15
39
34
29
42
41
RIGHTFRONT
LEFTFRONT
34
25
31 PT "A"
PT "B"
D37167
LINE FROM PT "A" TO TANKON 769D,771D TRUCKS ONLY
LINE FROM PT "A" TO PT "B"ON 773D,775D TRUCKS ONLY
28
22
11 Hydraulic & Transmission Tank B-3
12 Hoist Control Valve Group B-4
13 Relief Valve Group B-4
14 Hydraulic & Transmission Tank Screen Assemblies C-3,C-4
15 Hydraulic Tank Screen Group C-4
16 Hoist Gear Pump Group C-5
17 Hoist Telescoping Cylinder Group A-4
18 Screen For Oil Cooler B-5
19 Oil Cooler Core Group B-5
20 Converter Scavenge Gear Pump Group E-6
21 Converter Charge Gear Pump Group E-6
22 Brake Retract Gear Pump Group D-6
23 Brake Retract Filter D-6
24 Brake Retract Valve Group E-6
25 Converter Filter and Sump Group D-7
26 Orifice Plates A-4
27 Converter Outlet Relief Valve Group D-7
28 Converter Inlet Relief Valve Group C-6
29 Pump Drive Group C-6
30 Torque Converter Group D-7
31 Lock-up Clutch Valve Group D-7
32 Rear Brake Master Cylinder D-8
33 Slack Adjuster Group For Rear Brakes D-8
35 Electric Supplement Brake Retract Pump A-6
36 Hydraulic Tank For Brake Make-up F-6
37 Front Brake Master Cylinder E-2
38 Hydraulic Caliper Service Brake Groups B-1, E-1
39 Transmission Charge Pump Group D-3
40 Transmission Scavenge Gear Pump Group D-3
41 Transmission Filter Group D-3
42 Electrical Switch For Transmission Filter Bypass D-3
43 Oil Cooler Core Assembly D-2
44 Cooler Inlet Valve Group D-2
45 Transmission Tank Air Breather C-3
46 Air Filter And Breather C-4
49 Check Valve Group E-6
47 Diverter Valve Group For Manual Parking BrakeRetraction A-5, A-6
48A Hydraulic Control Group For Manual Parking BrakeTraction Aid (Attachment)
34 Parking And Service Brake Group For Left AndRight Rear Wheels A-8, F-8
Hydraulic System For Power Train, Hoist And BrakesMachine Location
Item No. Component Description SchematicLocation
24
34
2617
28
25
424110
222120
48A
33
47
34
2617
1514131211
32
3637
164039 38
35
10
4
49
46
7
45
8
65
9
43
44
27
21
18
30
29
23
3
31
19
38
D37165
49
34
24
2617
42
23
28
2510
222120
48A
33
47
34
2617
1514131211
32
3637
164039 38
35
10
4
46
7
45
8
65
9
43
44
27
2
41
1
18
30
29 3
31
19
38
D37166