Model 70160 Variable Displacement Piston Pumppub/... · Torque wrench (136 N.m [100 lbfft]...

Model 70160 Variable Displacement Piston PumpRepair Information

EN-801

2 EATON Hydraulics 70160 Variable Displacement Piston Pump Repair Information E-PUPI-TS005-E June 2004

Model 70160

Table of ContentsIntroduction ......................................................................................................... 2Identification ........................................................................................................ 3Tools Required .................................................................................................... 3Parts Drawing ...................................................................................................... 4 - 5Parts List ............................................................................................................. 6 - 7Repair information

Disassembly .................................................................................................. 8 - 10Reassembly ................................................................................................... 11 - 12

Fault - Logic Troubleshooting .............................................................................. 13 - 17Start-up Procedure .............................................................................................. 18

IntroductionThis manual provides service information for Eaton Models 70160 variable displacement piston pumps. Stepby step instructions for the complete disassembly, inspection, and reassembly of the pump are given. Thefollowing recommendations should be followed to insure successful repairs.

Remove the pump from the application.

Cleanliness is extremely important.

Clean the port areas thoroughly before disconnecting the hydraulic lines.

Plug the pump ports and cover the open hydraulic lines immediately after they're disconnected.

Drain the oil and clean the exterior of the pump before making repairs.

Wash all metal parts in clean solvent.

Use compressed air to dry the parts. Do not wipe them dry with paper towels or cloth.

Compressed air should be filtered and moisture free.

Always use new seals when reassembling hydraulic pumps.

Lubricate the new rubber seals with a petroleum jelly (Vaseline®) before installation.

Torque all bolts over gasketed joints, then repeat the torquing sequence to makeup for gasketcompression.

Verifying the accuracy of pump repairs on an authorized test stand is essential.

Introduction

3EATON Hydraulics 70160 Variable Displacement Piston Pump Repair Information E-PUPI-TS005-E June 2004

Model 70160

Single Pump - Product Number:

7 0 1 6 0 - R A A - 03

Tandem Pumps - Product Number:

7 8 1 6 3 - R A B - 03

Serial Number Code:

A 99 01 31 JBTester's Initials

Day of Month (two digits)

Month (two digits)

Revision level of parts list.

Last two digits of year built.( 98 for 1998 etc.)

Identification Numbers - Manually Variable Displacement Piston PumpStamped on each unit's mounting flange.

A - Product Number Description70160 = Single Piston Pump78162 = Single Piston Pump with Gear Pump78161 = Tandem Piston Pumps78163 = Tandem Piston Pumps with Gear Pump

B - Sequential NumberingC - Engineering Design Code

A

A

B

B

Tools Required1/2, 9/16, 7/8 & 1-1/8 in. sockets and/or end

wrenchesTorque wrench (136 N.m [100 lbf.ft] capacity)Ratchet wrench5/16 in. and 7/16 Allen wrenches or bit socketsInternal and external retaining ring pliersSmall screwdrivers (2)Hammer (soft face)Light Petroleum JellySeal driver or similar tool

Each order must include the following information.1. Product and/or Part Number2. Serial Number Code3. Part Name4. Quantity

C

C


Model 70160

PartsDrawingPump drawn below is typical of a righthand rotation pump.

30

3-1Press Fit

6

5

4

1

Shaft assembly for rear pump of tandem.

Shaft assembly for single pump or front pump of tandem.

1

7

7

8

8

8

89

1010

910

10

11

11

29

48

12

24

41

16 Press Fit

23

17

17

14

3

5050-1

51

22

22 Press Fit

51-1

13

14

4039

41

Port(D2)

Port(D1)

39Press Fit into Cover plate


Model 70160

PartsDrawing

22-1 2-226

2627

27

28

2837

37(K4-4)

2-1 2-226

26

19

2

27A

27B

28A

55-149 55-2

55-355-449-1

5555-5

37

35

36

55-1

55

55-255-4

55-5

4949-1

3434-1

32(K2-1)

K2-2

K2-3

32(K3-1)

31(K3-2)

33(K3-3)

K3

K2

32(K4-1)

K4-2

K4-3

K4

K1-1 32(K2-2)

K2-3

K2-4

K1

46

46

20

2121-1

20-1

20

2121-1

20-1

55-3


Model 70160

Item Qty. Description

1 1 Drive Shaft2 1 Backplate Assembly3 1 Housing Assembly4 1 Rotating Kit Assembly5 1 Camplate6 1 Washer

+ 7 1 Retaining Ring+ 8 2 Retaining Ring

9 1 Thrust Bearing10 2 Bearing Race

+ 11 1 Shaft Seal, Drive11 1 Viton Shaft Seal, Drive11 1 Spacer

+ 12 1 Housing Gasket13 1 Camplate Insert14 6 Washer

+ 16 1 Shaft Seal, Trunnion17 6 Screw, Cap20 1 for Port "C" Relief Valve S/A

+ 20-1 1 O-ring, 2.95 mm Dia. x 23,46 mm ID. [.116 in. Dia. x .924 in. ID.]21 1 for Port "D" Relief Valve S/A

+ 21-1 1 O-ring, 2.95 mm Dia. x 23,46 mm ID. [.116 in. Dia. x .924 in. ID.]22 2 Cone Bearing23 1 Coverplate Sub Assembly24 1 Coverplate Sub Assembly26 2 Dowel Pin27 2 Cap Screws, 5/16-18, 50.8 mm [2 in.] Long27A 2 Cap Screws, 5/16-18, 82.6 mm [3.25 in.] Long27B 2 Cap Screws, 5/16-18, 88.9 mm [3.5 in.] Long28 2 Cap Screws, 5/16-18, 63.5 mm [2.5 in.] Long28A 2 Cap Screws, 5/16-18, 95.3 mm [3.75 in.] Long28B 2 Cap Screws, 5/16-18, 101.6 mm [4.00 in.] Long29 1 Key, Drive Shaft30 1 Key, Tapered Arm31 1 Cover Plate (In K3 kit)

+ 32 1 O-ring (In K1, K2, K3, & K4 kit)33 2 Cap Screws, Cover Plate (In K3 kit)34 1 Plug Assembly

+ 34-1 1 O-ring, 2.21 mm Dia. x 16.36 mm ID. [.087 in. Dia. x .644 in. ID.]+ 35 1 Molded O-ring

36 1 Charge Pump Adaptor37 1 Gerotor set and coupler sub-assembly37 1 9 tooth coupler (In Kit 4)37 1 11 tooth coupler (In Kit 5)39 2 Cup, Bearing40 1 Ring, Crush41 2 O-ring, 2.38 mm Dia. x 66.68 mm I.D. [.0937 in. Dia. x 2.625 in. I.D.]42 4 Washer46 1 Mounting Bracket, Square shaped46 1 Mounting Bracket, "V" shaped48 1 Valve Plate

Parts List


Model 70160

Parts List

Righthand (CW) RotationLefthand (CCW) Rotation

49 1 Plug Assembly49-1 1 Plug Assembly

+ 50-1 1 O-ring, 1.98 mm Dia. x 11.89 mm ID. [.078 in. Dia. x .468 in. ID.]51 1 Plug Assembly

+ 51-1 1 O-ring, 1.98 mm Dia. x 11.89 mm ID. [.078 in. Dia. x .468 in. ID.]55 1 Bypass Valve sub-assembly

+ 55-1 1 Retaining Ring55-2 1 Separator Plug55-3 1 Separator

+ 55-4 1 O-ring, 1.59 mm Dia. x 9.53 mm I.D. [.0625 in. Dia. x .375 in. I.D.]+ 55-5 1 O-ring, 2.46 mm Dia. x 19.18 mm I.D. [.097 in. Dia. x .755 in. I.D.]

Mounting KitsK1 1 Tandem Piston Pump Mounting KitK1-1 1 35T Coupler, 36.8 mm [1.45 in.] longK1-2 1 O-ring, 1.59 mm Dia. x 101.6 mm ID. [.0625 in. Dia. x 4 in. ID.]K1-3 2 Cap ScrewsK1-4 2 WasherK2 1 Gear Pump Mounting KitK2-1 1 O-ring, 1.59 mm Dia. x 82.55 mm ID. [.0625 in. Dia. x 3.25 in. ID.]K2-2 2 WasherK2-3 2 Cap ScrewsK3 1 Cover Plate KitK3-1 1 O-ring, 1.59 mm Dia. x 82.55 mm ID. [.0625 in. Dia. x 3.25 in. ID.]K3-2 1 Cover PlateK3-3 2 Cap ScrewsK4 1 Gear Pump Mounting Kit with CouplerK4-1 1 O-ring, 1.59 mm Dia. x 101.6 mm ID. [.0625 in. Dia. x 4 in. ID.]K4-2 2 WasherK4-3 2 Cap ScrewsK4-4 1 9T Coupler

Seal Repair Kit• 1 Seal Repair Kit (see Parts Manual for part numbers)

Legend + Included in seal repair kit.

Item Qty. Description


Model 70160

DisassemblyThe following disassembly procedure applies to a single pump

with or without gear pump Therepair procedure for tandempumps, once they are separated, isbasically the same. The basicconfiguration differences betweena single and tandem pumps are thebackplates, pump shafts andhousing assemblies. In mostcases, only the rear pump of

tandem units contain a charge pump, which is common toboth the front and rear pump. The rear tandem pump does notincorporate a shaft seal.

Thoroughly clean the Eaton Model 70160 or 78162 variabledisplacement pump before anyrepairs are attempted. Whenworking on tandem pumps,separate the front and rear pumpsfirst.

1 Support the pump with theinput shaft down. Use a 1/2 in.socket or end wrench to removethe pump adapter cover plate orgear pump (see Figure 2).

2 Use a pick or similar tool toremove the adapter cover plate orgear pump o-ring. (See Figure 3)

3 Use a 7/16 in. Allen wrench orbit socket remover to remove thecharge pressure relief valve springretainer from the pump adaptorassembly (see Figure 4).

4 Use a pencil magnet or similartool to carefully remove the chargepressure spring and poppet fromthe pump adaptor assembly. (SeeFigure 5) Use caution not to dropthe charge pump poppet into thepump adaptor assembly.

5 The charge pressure reliefvalve and poppet may be of thestandard or high pressure type. The(6.9 to 10.3 bar [100 to 150 PSI])standard spring and poppet areshown on the bottom and theoptional high pressure (13.7 to20.7 bar [200 to 300 PSI]) springand poppet is shown on the top.

The same charge pressure relief valve spring retainer is usedwith either the standard or highpressure (see Figure 6).

6 Use a 7/8 in. socket or endwrench to remove the optionalbypass valve assembly from thebackplate (see Figure 7).

7 The internal seal may bereplaced by first removing thesmall retaining ring on the end ofthe bypass valve. Remove andreplace the o-rings (see Figure 8).

8 Use a 9/16 in. hex key toremove the two high pressure reliefvalves from the pumps backplateassembly (see Figure 9). Removerelief valve as shown from eachside (see Figure 10). Each systemrelief valve S/A is identified by bothits part number and relief valvesetting as shown in Parts Information manual.

9 Firmly support the pump assembly. Use a 1/2 in. socket orend wrench to remove the four cap screws retaining the chargepump adapter assembly.

10 With the cap screws removed,remove the charge pump adaptorassembly from the backplate (seeFigure 11).

Note: The front pump assembliesdo not have charge pump adapterassemblies.

11 Turn the adapter assemblyover. Use an o-ring pick or similartool remove the o-ring seal (seeFigure 12).

12 Inspect the gerotor pocket andneedle bearing located in thecharge pump adapter. The needles in the needle bearing mustremain intact in the bearing cage.

Repair Information - Disassembly

Figure 1

Figure 2

Figure 3

Figure 5

Figure 4

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12


Model 70160

13 When the needle bearingassembly is replaced, thenumbered end of the bearing mustface toward the flange side of theadapter to the dimension as shown(see Figure 13).

14 With the charge pump adapterremoved, remove the charge pumpouterring and inner gerotor ringassembly (see Figure 14 and 15).

15 Charge pumps are available intwo different displacements Chargepump displacements are based onthe thickness of the gerotorassembly and the depth of thepocket located in the charge pump adapter. To determine thedisplacement, refer to the table below.

Gerotor Pocket DepthDisplacement Depth of Pocketcm3/r [in3/r] mm [in.]

6.9 [.42] 6.35 [.25]13.8 [.84] 12.7 [.50]

16 To separate the backplateassembly from the dowel pins inthe pump housing assembly, inserttwo screwdrivers betweenbackplate and housing assemblyand pry upward (see Figure 16).

17 After separation, remove thebackplate from the housingassembly.

18 Turn the backplate assemblyover and inspect the needlebearing. The needles in the needlebearing must remain intact in thebearing cage (see Figure 17).

19 When the needle bearingassembly is replaced, thenumbered end of the bearing mustface the valve plate side of thebackplate to the dimension asshown (see Figure 18).

20 With the backplate removed,remove the gasket from the pumphousing assembly and discard (seeFigure 19).

21 Remove the valve plate from the piston block assembly.Note: This valve plate may have stuck to the backplateassembly that was previously removed.

22 Valveplate directional rotation (CW or CCW) is identifiedby the location of the metering slots located on the face of thevalve plates. Pump inputrotation should always turninto the metering slots (seeFigure 20). A clockwisevalve plate is shown on theleft and a counter clockwisevalveplate is on the right.Note: Whenever pumpinput rotation is changed, the valve plate must be replacedalong with the desired rotation charge pump adapter.

23 Remove the rotating kit assemblyby carefully retaining it in the housingassembly (see Figure 21). Lift thehousing and rotating kit assembly andturn over assemblies allowing therotating kit assembly to slide down theinput shaft and out of the pumphousing.

24 With the rotating kitassembly removed, remove thepiston assemblies, spider andspider pivot from the pistonbarrel.(see Figure 22).

25 Inspect the pistonassemblies, spider, spider pivotand piston block. The piston block assembly usually requiresno further disassembly unless the pins or block spring aredamaged.

26 When any excessive wear orscratches are noted on the face ofthe piston block, the blockassembly must be replaced (seeFigure 23).

DO NOT LAP THE FACE OF PISTONBLOCK ASSEMBLY.

27 To remove the input shaftassembly, use a pair of internalsnap ring pliers and remove theshaft seal retaining ring from thehousing assembly (see Figure 24).

Numbered End

Gerotor Pocket

2.41 mm[.095 in.]

Flange

Figure 13

Figure 17

2.79 mm[.110 in.]

1.91 mm[.075 in.]

Numbered End

Figure 18

Figure 20

Figure 22

Figure 23

Figure 24

Figure 15

Figure 16

Figure 14

Figure 19

Figure 21



Model 70160

28 With the retaining ringremoved, use a small press topress the shaft seal and input shaftassembly from the housingassembly.

29 With the input shaft assemblyremoved, disassemble theassembly for inspection byremoving the shaft seal, washer,retaining ring thrust washers andbearing (see Figure 26).

Note: The rear pump on tandemunits uses a spacer in place ofshaft seals.

30 To remove the camplate fromthe housing assembly, use a 9/16in. socket or end wrench andremove the three cap screws andwashers retaining the control arm cover plate assembly. Startat the cover plate with control arm (see Figure 27).

31 With the retaining cap screws removed, insert two smallscrewdrivers in the notches locatedin the cover plate assembly and pryupward. Make sure bearing cupcomes off with the cover plate (seeFigure 28).

Note: The crush ring in the controlarm trunnion cover does not needto be removed (see Figure 29). Theonly time the crush ring needs tobe removed is when either thetrunnion cover, the camplateassembly or the housing assemblyis replaced. A shim kit is thenrequired in the crush ring’s place.

32 Reposition the pump assemblyto remove opposite cover plate.The bearing cup in this cover plateis press fit and not removable.Repeat steps 30 through 31.

32b Remove the slip fit bearing onthe non-control arm side of thecamplate.

33 With housing in the uprightposition, slide the camplate toward the control side and lift itfrom the pump housing (see Figure 30).

Note: The camplate control shaft will fit out either side of thepump housing. Be sure to note on which side of the housingthe control shaft protrudes before removing camplate from

34 Use an o-ring pick or similar tool to remove the o-ringseals from the two counter-bores in the housing or the coverplates (see Figure 31).

35 To remove the control side cover plate lip seal, use a smallpress and press the lip seal inward(see Figure 32).

36 Remove the thrust plate fromthe camplate. The thrust plate isreversible and either side may facethe camplate (see Figure 33).

37 Inspect the housingassembly's front needle bearing. Ifthe needles remain in their cageand move freely, replacementusually is not required (see Figure34).

38 When the needle bearing isreplaced, the numbered end of theneedle bearing must face awayfrom the housing and pressed tothe dimension as shown (seeFigure 35).

Figure 26

Figure 27


Figure 32

Figure 34

1.78 mm[.07 in.]

Numbered EndFlange End of Housing

Figure 35

Figure 25

Figure 28

Figure 29

Figure 30

Figure 33

Figure 31


Model 70160

Reassembly1 Before reassembling the pump, replace all worn anddamaged parts, assemblies, seals and o-rings. Lubricate theseals and o-rings with petroleum jelly to help retain themduring reassembly and to provide lubrication to the input andcontrol shaft seals. Lubricate all finished part surfaces freelywith clean hydraulic fluid to help provide start up lubricationbetween all rotating parts.

2 To reassemble the camplateassembly into the pump housing,tilt the camplate slightly and installthe control side of the camplatethrough the previously noted ormarked side of the housingassembly (see Figure 36).

3 Lubricate the tapered bearingand reassemble it on the non-control arm side of the camplate(see Figure 37).

4 Lubricate and install the o-ringseal into counter-bore of housing(see Figure 37).

5 Install the trunnion cover overbearing and onto pump housing.Install the three cap screws andwashers, torque screws to 39,3 Nm[29 ft-lb] (see Figure 38).

6 Lubricate and install thecontrol arm shaft seal into thecontrol arm cover plate. Install with the lip of the seal facingupward or to the inside of the pump (see Figure 39).

7 If the housing, trunnion covers or camplate assembly havenot been replaced, the existing crush ring may be re-used. Ifyou have replaced anyone of the above a shim kit must replacethe crush ring. See Parts Information manual for number.

8 Place the bearing cup into trunnion cover over the crushring or shims (see Figure 40).

9 Lubricate and install the o-ringseal into counter-bore of housing(see Figure 41).

10 Install the trunnion cover overthe control shaft and into the pumphousing. Install the three retainingcap screws and washers, torquescrews to 39,3 Nm [29 ft-lb] (seeFigure 42).

11 Using your fingers, tilt thecamplate back and forth to checkthe trunnion bearing preload.Proper preload is achieved whenthe camplate has a very slighttilting resistance. The camplatemust not have any or very little sideclearance.

12 Reassemble the input shaftassembly by installing the thrustwasher, thrust bearing, secondthrust washer, retaining ring,washer and shaft seal (see Figure43).

Note: The lip of the shaft seal mustpoint toward the center of the inputshaft.

13 Install the input shaftassembly into the housingassembly. Push the shaft seal injust far enough so you can start theshaft seal retaining ring.

14 Use a pair of snap ring pliersto install retaining snap ring intothe housing assembly (see Figure44).

15 Use a seal driver or similartool to press or drive the snap ring and seal into the housingassembly (see Figure 45).

CAUTION! Press or drive inwarduntil the snap ring snaps into thesnap ring groove located in thepump housing assembly.

16 The thrust plate is reversible.Either side will fit into the camplate.In most cases if any irregularitiesare noted it is best to replace the thrust plate (see Figure 46).

Figure 38

Figure 42

Figure 43

Figure 44

Figure 45

Repair Information - Reassembly

Figure 36

Figure 37

Figure 39 Figure 40

Figure 41

Figure 46


Model 70160

18 Lubricate and install thethrustplate over the input shaftassembly and into the camplate.The thrustplate must rest firmly inits pocket located in the camplate.

19 Reassemble the rotating kitassembly by first aligning thesplines in the pivot with the splinesin the block. Install the pivot on theblock assembly pins (see Figure 47).

20 Use a small socket or similartool to help retain the pivot in thecentered position. Lubricate andinstall the spider and pistonassemblies onto the pivot andpistons into the piston blockassembly (see Figure 48).

21 Hold the housing assembly inthe vertical position then carefullyinstall the rotating kit by firstaligning with the splines on theinput shaft. With splines aligned,install the rotating kit into thepump housing (see Figure 50). Usecaution to ensure all parts are keptin their proper position.

22 With the rotating kit installed,reposition the housing assembly inthe input shaft down position andinstall a new housing gasket (seeFigure 50).

23 Lightly coat the backplate sideof the valve plate with petroleumjelly for retention during assembly.Install the valve plate over theneedle bearing, aligning the smallslot on the outside of the valveplate with the dowel pin in thebackplate (see Figure 51).

24 Carefully install the backplateassembly by aligning it with thedowel pins located in the pumphousing. Use caution not todislodge the valve plate (see Figure 54).

25 Align the spline of thegerotor’s inner ring, then lubricateand install the inner ring and outerring over the input shaft and ontothe backplate assembly (see Figure53).

Note: Before installing the charge pump adaptor plate, offsetthe outer ring of the geroter asshown.

26 With the gerotor assemblyinstalled, install new o-ring intocharge pump adapter plate andplace adapter onto backplate overgerotor. Retain with cap screws.Torque cap screws to 25 N•m [18.5lbf•ft] (see Figure 54).

27 Install the two high pressurerelief valves. Torque valves 128,8to 142,4 Nm [95 to105 lb-ft] (seeFigure 55).

29 Lubricate and reassemble thebypass valve assembly. Install thebypass valve into the backplate.Torque valve to 30,5±2 Nm[22.5±1.5 lb-ft] (see Figure 56).

30 Coat the charge pressurepoppet with petroleum jelly andplace poppet onto spring and installinto the adapter plate (see Figure57).

31 Install the hollow chargepressure relief valve retainer intothe adapter plate. Torque retainerto 6,8 to 9,5 Nm [5 to 7 lb-ft].

32 Lubricate and install the o-ringon the cover plate or gear pump.Install the cover plate or gear pumpand two cap screws. Torque cap screws to 36,6 to 40 Nm [27to 31 lb-ft].

The Model 70160 or 78162 variable displacement pump is nowready for test and reinstallation.

Figure 48

Figure 49

Figure 51

Figure 54

Figure 55

Figure 56

Figure 57

Repair Information - Reassembly

Figure 47

Figure 50

Figure 52

Figure 53


Model 70160

1

Inspect?

Repairor

Replace

Defective

ActionStep

CommentNumber

Decision

Solution

Symptom:

Gauges RecommendedInlet vacuum gauge: 2 bar to 1 bar [30 PSI to 30 inHg]System pressure gauge: 700 bar [10,000 PSI]Charge pressure gauge: 0 to 50 bar [0 to 600 PSI]Case pressure gauge: 0 to 25 bar [0 to 300 PSI]

ExplanatoryDiagram

This fault - logic troubleshooting guide is adiagnostic aid in locating transmission problems.

Match the transmission symptoms with the problemstatements and follow the action steps shown in thebox diagrams. This will provide help in correctingminor problems eliminating unnecessary machinedown time.

Following the fault - logic diagrams are diagramaction comments of the action steps shown in thediagrams. Where applicable, the comment number ofthe statement appears in the action block of thediagrams.

Recommended Gauge Locations

Figure 58

Pressure PortsTee In Line to CheckSystem Pressure

Charge Pump Suction PortTee In Line to Check InletVacuum

Drain PortTee In Line to CheckCase Pressure

Auxiliary PortCheck Charge Pressure

Fault - Logic Troubleshooting

Bypass ValveLocation


Model 70160


InspectServo Control

(If used)OK

1 2

InspectExternal Control

Linkage

Defective

Repairor

Replace

Defective

Repairor

Replace

Symptom: Neutral Difficult or Impossible to Find

InspectHeat

ExchangerOKOK OK

4 5 6

CheckOil Level inReservoir

Fill toProperLevel

DefectiveBelow Level

Repairor

Replace

CheckSystem

Pressure

ReduceSystem

Load

High

OK9

InspectCharge Relief

ValveOK

11

InspectChargePump 13

InspectMotor

12

InspectInlet Screen

or Filter

Replace

Clogged

OK8

CheckCharge

Pressure10

Low OK

OK

ReplacePump &Motor

Inspect PumpBypass Valve

(If used)OK

7

Inspect HeatExchanger

Bypass Valve(If used)

OK

Defective

Repairor

Replace

Defective

Repairor

Replace

Defective

Repairor

Replace

Defective

Repairor

Replace

Defective

Repairor

Replace

Symptom: System Operating Hot


Model 70160


(If used)OK OK

1 2 3

InspectExternal Control

Linkage

Defective

Repairor

Replace

InspectSystem Relief

Valves

Defective

Repairor

Replace

Defective

Repairor

Replace

Symptom: Operates in One Direction Only


(If used)OKOK OK

2 7

Defective

Repairor

Replace

InspectMotor

12

Replace

Clogged

CheckCharge

Pressure10

Low OK


(If used)

ReplacePump &Motor

Defective

Repairor

Replace

InspectInlet Screen

or FilterOKOK OK

8 13

Defective

Repairor

Replace


Valve11

InspectChargePump

Defective

Repairor

Replace

Defective

Repairor

Replace

Symptom: System Response Sluggish



Model 70160

Check ExternalControlLinkage

OKOK OK4 1 7

CheckOil Level inReservoir

Fill toProperLevel

DefectiveBelow Level

Repairor

Replace

CheckSystem

PressureOK

9


ValveOK

11

InspectChargePump 13

InspectMotor

12

InspectInlet Screen

or Filter

Replace

Clogged

OK8

CheckCharge

Pressure10

Low OK

OK

ReplacePump &Motor


(If used)OK

2


(If used)

OK

Defective

Repairor

Replace

Defective

Repairor

Replace

Defective

Repairor

Replace

Defective

Repairor

Replace

Defective

Repairor

Replace

High

ReduceSystemLoad

Symptom: System Will Not Operate In Either Direction




Model 70160

When starting a new or rebuilt transmission system, it isextremely important to follow the start-up procedure. Itprevents the chance of damaging the unit which might occur ifthe system was not properly purged of air before start-up.

1 After the transmission components have been properlyinstalled, fill the pump housing at least half full with filteredsystem oil. Connect all hydraulic lines and check to be surethey are tight.

2 Install and adjust all control linkage.

3 Fill the reservoir with an approved oil that has been filteredthrough a 10 micron filter. Refer to Eaton HydraulicsTechnical Data Sheet number 3-401 titled Hydraulic FluidRecommendations.

4 For Gasoline engines or L.P. engines remove the coil wireand turn the engine over for 15 seconds. For Diesel enginesshut off the fuel flow to the injectors and turn the engineover for 15 seconds.

5 Replace the coil wire or return the fuel flow to the injectors.Place the transmission unit in the neutral position, start theengine and run it at a low idle. The charge pump shouldimmediately pick up oil and fill the system. If there is noindication of fill in 30 seconds, stop the engine anddetermine the cause.

6 After the system starts to show signs of fill, slowly movepump camplate to a slight cam angle. Continue to operatesystem slowly with no load on motors until systemresponds fully.

7 Check fluid level in the reservoir and refill if necessary tothe proper level with an approved filtered oil.

8 Check all line connections for leaks and tighten ifnecessary.

The machine is now ready to be put into operation.

Frequent filter changes are recommended for the first twochanges after placing the machine back into operation. Changethe first filter in 3-5 hours and the second in approximately 50hours. Routinely scheduled filter changes are recommendedfor maximum life of the hydraulic system.

Start-up Procedure


Model 70160

Notes:

© 2004 Eaton CorporationAll Rights ReservedPrinted in USADocument No. E-PUPI-TS005-EJune 2004

Eaton14615 Lone Oak RoadEden Prairie, MN 55344USATel: 952 937-9800Fax: 952 974-7722www.hydraulics.eaton.com

EatonDr.-Reckeweg-Str. 1D-76532 Baden-BadenGermanyTel: (49) 7221 682-0Fax: (49) 7221 682-788

Eaton20 Rosamond RoadFootscrayVictoria 3011AustraliaTel: (61) 3 9319 8222Fax: (61) 3 9318 5714

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Model 70160 Variable Displacement Piston Pumppub/... · Torque wrench (136 N.m [100 lbfft]...

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