Eaton 70360 Parts And Repair Information
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Eaton 70360 Parts And Repair Information

Medium duty variable displacement piston pump
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  • Page 2 No. 6-637 Eaton ® January 1998 Medium Duty Piston Pump Parts and Repair Information Model 70360 Variable Displacement Piston Pump 40,6 cm /r [2.48 in /r] or 49,2 cm /r [3.00 in /r] Displacements Manual Controlled...

  • Page 3: Table Of Contents

    Start-up Procedure ....................25 Introduction This manual provides service information for Eaton Models 70360 variable displacement piston pumps. Step by step instructions for the complete disassembly, inspection, and reassembly of the pump are given. The following recommendations should be followed to insure successful repairs.

  • Page 4: Identification

    Single Pump - Product Number: A - Product Number Description 7 0 3 6 0 - R A A 70360 = Single Piston Pump 78362 = Single Piston Pump with Gear Pump 78361 = Tandem Piston Pumps 78363 = Tandem Piston Pumps with Gear Pump...

  • Page 5: Parts Drawing

    Model 70360 Parts Drawing Pump drawn below is typical of a righthand rotation pump. Port (D2) 54-1 12-1 24-1 Shaft assembly for 53-1 single pump 10-1 or front pump Port 10-2 of tandem. (D2) Shaft assembly for rear pump of tandem.
  • Page 6 Model 70360 Parts Drawing Assembly for unit without gerotor charge pump. 25-3a 25-3 K1-3 25-3-3 25-3-3 Port Valve Plate (C1) Identification K1-1 Port (A) K1-2 Note "V" notch 25-1 locations Lefthand Righthand Rotation Rotation Port (B) Used in place of Auxiliary pump.

  • Page 7: Parts List

    Model 70360 Parts List Item Part No. Qty. Description 16028-404 Dowel Pin 16322-xxx Shims 16077-32 Retaining Ring 16078-18 Retaining Ring 16032-610 Screw 17079-2 Spring 32060-8 Plug Assembly + 8-1 16015-18-90 O-ring, 2,38 mm Dia. x 22,23 mm I.D. [.0937 in. Dia. x .875 in. I.D.] ♦...
  • Page 8 O-ring, 1,59 mm Dia. x 82,55 mm ID. [.0625 in. Dia. x 3.25 in. ID.] K3-2 70142-600 Cover Plate K3-3 16032-610 Cap Screws Seal Repair Kits • 70360-900 Seal Repair Kit for 70360 piston pump. (Order two for tandem pumps) ♦ Legend Refer to specific item parts list. Common parts to seal repair kits.

  • Page 9: Rotating Kit Assembly

    Model 70360 Item 9 - Rotating Kit Assembly Item 18 and 19 - Cap Screw Locations Item 9 Rotating Kit Assembly Item Part No. Qty. Description 70300-603 Rotating Kit Assy. 2.48 in 70400-703 Rotating Kit Assy. 3.00 in Piston Assembly...

  • Page 10: Relief Valve

    Model 70360 Item 22 or 23 - Relief Valve Item 22 or 23 Internal Relief Valve Settings Available Part Number bar [PSI] 32060-LA 138 [2000] 32060-QA 172 [2500] 32060-UA 207 [3000] 32060-WA 241 [3500] 32060-ZA 276 [4000] 32060-XA 310 [4500]...

  • Page 11: Backplate Assembly Identification

    Model 70360 Item 25 - Backplate Assembly Identification Item 25 - Parts List (Refer to Identification chart and drawings) Item Part No. Qty. Description See Chart Below Backplate Assembly 25-1 52200-23 Bearing 25-2 16026-610 Dowel Pin 25-3 70300-610 Bypass Valve Assembly...
  • Page 12 Model 70360 Item 25 - Backplate Assembly Identification 25-3-1 25-3b 25-3-2 25-3a 25-3a 25-3b 25-3-4 25-3 25-3-5 25-3-3 25(c) 25-3 Port Rear "A" Mount, 25-3-3 (C1) Same Side Port 25(a) (C3) Porting Accepts Port (C1) Gerotor Charge Pump Adapter 25-1...

  • Page 13: Charge Pump Adapter Identification

    Model 70360 Item 29 - Charge Pump Adapter Assembly Identification Configuration for 13,8 to 17,2 bar [200 to 250 PSI] or 29-4a 17,2 to 20,7 bar [250 to 300 PSI] Charge Relief Valve 29-3a or 3b Righthand Rotation 29-2a Pressure Check Port or...
  • Page 14 Model 70360 Item 29 - Charge Pump Adapter Assembly No Charge Relief Item Part No. Qty. Description Rotation Displacement 70440-369 Assembly, Charge Pump Adapter Righthand 13,8 cm /r [.84 in 29-1 16239-1148 Bearing (press fit) 6.9 to 10.3 bar [100 to 150 PSI] Charge Relief Setting Item Part No.

  • Page 15: Drive Shaft Identification

    Model 70360 Item 27 - Drive Shaft Identification Part Number Input Drive Where Used Output Drive 9 Tooth Internal 9 Tooth Internal 9 Tooth Internal 70442-202 [15 Tooth] or 70442-209 [13 Tooth] 9 Tooth Internal 70442-248 [15 Tooth] or 70442-297 [13 Tooth] 70442-275 [1 in.

  • Page 16: Repair Information

    Figure 7 Use a 1-1/16 in. socket or end Thoroughly clean the Eaton Model 70360 or 78362 variable wrench to remove the two high displacement pump before any pressure relief valves from the repairs are attempted.
  • Page 17 Figure 15 Gerotor Pocket Depth 24 The model 70360 variable Displacement Depth of Pocket displacement pumps are /r [in mm [in.] available in two different 6.9 [.42]...
  • Page 18 Model 70360 Repair Information 37 To remove the control side 28 To remove the input shaft Figure 24 cover plate lip seal, use a small assembly, use a pair of internal press and press the lip seal inward. snap ring pliers and remove the...

  • Page 19: Reassembly

    Model 70360 Repair Information Lubricate and install the Figure 43 control arm shaft seal into the Reassembly control arm trunnion cover. Install Before reassembling the pump, replace all worn and with the lip of the seal facing damaged parts, assemblies, seals and o-rings. Lubricate the...
  • Page 20 (See Figure 54) to 31 ft. lbs.]. 24 Carefully install the backplate The Model 70360 or 78362 variable displacement pump is now assembly by aligning it with the ready for test and reinstallation. dowel pins located in the pump housing.

  • Page 21: Fault - Logic Troubleshooting

    Model 70360 Fault - Logic Troubleshooting Explanatory This fault - logic Troubleshooting guide is a Diagram diagnostic aid in locating transmission problems. Symptom: Match the transmission symptoms with the problem Action statements and follow the action steps shown in the Step box diagrams.
  • Page 22 Model 70360 Fault - Logic Troubleshooting Symptom: Neutral Difficult or Impossible to Find Inspect Inspect External Control Servo Control Linkage (If used) Defective Defective Repair Repair Replace Replace Symptom: System Operating Hot Inspect Heat Check Inspect Check Exchanger Oil Level in...
  • Page 23 Model 70360 Fault - Logic Troubleshooting Symptom: Operates in One Direction Only Inspect Inspect Inspect External Control Servo Control System Relief Linkage (If used) Valves Defective Defective Defective Repair Repair Repair Replace Replace Replace Symptom: System Response Sluggish Check Inspect...
  • Page 24 Model 70360 Fault - Logic Troubleshooting Symptom: System Will Not Operate In Either Direction Inspect Pump Check Check External Check Bypass Valve Oil Level in Control Charge Reservoir Linkage (If used) Pressure Below Level Defective Defective Fill to Repair Repair...
  • Page 25 * System/Charge Relief Valve Pressure Settings for Eaton’s c. valve held off seat Variable Displacement Controlled Piston Pumps d. damaged valve seat Inlet Vacuum 6 inHg max.

  • Page 26: Start-Up Procedure

    3 Fill the reservoir with an approved oil that has been filtered Frequent filter changes are recommended for the first two through a 10 micron filter. Refer to Eaton Hydraulics changes after placing the machine back into operation. Change Technical Data sheet number 3-401 titled Hydraulic Fluid the first filter in 3-5 hours and the second in approximately 50 Recommendations.
  • Page 27 Model 70360...
  • Page 28 Model 70360...

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