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No. 7-620

January, 1996

Eaton

Medium Duty Piston Pump

Repair Information

Model 70342 and 70344,

40.6 cm

/r [2.48 in

/r] Displacement

Manually Variable Displacement Piston Pump

70342

78341

Tandem

70344

70342

Содержание 704342

Страница 1: ...o 7 620 January 1996 Eaton Medium Duty Piston Pump Repair Information Model 70342 and 70344 40 6 cm3 r 2 48 in3 r Displacement Manually Variable Displacement Piston Pump 70342 78341 Tandem 70344 70342...

Страница 2: ...emely 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...

Страница 3: ...16 Inch Hex Key Allen 9 16 End Wrench T 25 Torx Screwdriver Soft Face Hammer Internal Retaining Pliers Straight 090 Tip External Retaining Pliers Straight 070 Tip Regular or Locking Pliers Seal Drive...

Страница 4: ...n below is typical of a righthand rotation pump 24 1 24 14 3 3 14 13 21 10 6 1 12 11 6 28 9 42 Date Code and Assembly Number Location 20 41 5 16 17 16 5 4 27 Shaft assembly for rear pump of tandem 27...

Страница 5: ...23 7 8 1 8 38 30 31 39 29 18 19 61 45 25 3 25 1 29 1 33 36 43 K3 Used in place of Auxiliary pump K2 37 1 37 25 1 25 2 26 15 2 25 22 7 8 1 8 23 7 8 1 8 18 25 3 25 3 3 25 3 3 25 3a 19 K1 K2 1 K2 2 K2 3...

Страница 6: ...Seal Trunnion 21 1 Viton Shaft Seal Trunnion 22 1 Relief Valve for Port C Identification drawing on page 7 23 1 Relief Valve for Port D Identification drawing on page 7 24 1 Housing Assembly Identific...

Страница 7: ...3 2 Cap Screws K2 1 Gear Pump Mounting Kit K2 1 1 O ring 1 59 mm Dia x 82 55 mm ID 0625 in Dia x 3 25 in ID K2 2 1 Washer K2 3 2 Cap Screws K3 1 Cover Plate Kit K3 1 1 O ring 1 59 mm Dia x 82 55 mm I...

Страница 8: ...8 mm 07 in Numbered End Flange End of Housing Figure 1 4 12 Discard the shaft seal gaskets and o rings from all assemblies Replace with new seals upon reassembly The following instructions apply to a...

Страница 9: ...in contact with camplate Check all parts for proper position before proceeding 9 Clamp pump assembly in a protected jaw vise with the open end of the housing up Install gasket and two dowel pins onto...

Страница 10: ...spring Inspect the bearing inside the charge pump adapter The bearing needles must remain in the bearing cage and bearing at dimension shown in figure 1 2 Inspect the gerotor pocket inside the charge...

Страница 11: ...1 ea 3 8 in N C nut To remove spring place one of the flat washers over the 3 8 in x 3 1 4 in cap screw Put cap screw through the center of the piston block and apply the second washer Let washer rest...

Страница 12: ...ssion problems Match the transmission symptoms with the problem statements and follow the action steps shown in the box diagrams This will give expedient aid in correcting minor problems eliminating u...

Страница 13: ...fective Below Level Repair or Replace Check System Pressure Reduce System Load High OK 9 Inspect Charge Relief Valve OK 11 Inspect Charge Pump 13 Inspect Motor 12 Inspect Inlet Screen or Filter Replac...

Страница 14: ...erates in One Direction Only Inspect Servo Control If used OK OK OK 2 7 Defective Repair or Replace Inspect Motor 12 Replace Clogged Check Charge Pressure 10 Low OK Inspect Dump Valve If used Replace...

Страница 15: ...Valve OK 11 Inspect Charge Pump 13 Inspect Motor 12 Inspect Inlet Screen or Filter Replace Clogged OK 8 Check Charge Pressure 10 Low OK OK Replace Pump Motor Inspect Servo Control If used OK 2 Inspect...

Страница 16: ...bstructed inlet or outlet c open inlet to charge pump 9 Check System Pressure a See figure 3 1 for location of pressure gauge installation b consult owner operators manual for maximum system relief va...

Страница 17: ...injectors and turn the engine over 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 the engine and run it at a...

Страница 18: ...18 Model 70342 and 70344 Notes...

Страница 19: ...19 Model 70342 and 70344 Notes...

Страница 20: ...Eden Prairie MN 55344 Telephone 612 937 9800 Fax 612 937 7130 Eaton Ltd Hydraulics Division Glenrothes Fife Scotland KY7 4NW Telephone 01 592 771 771 Fax 01 592 773 184 Eaton GmbH Hydraulics Products...

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