Parts and Repair Information - Eaton

1 Parts and RepairInformationEaton Medium Duty Piston PumpModel 70523 or 70553, 0 -69 cm3/r [ in3/r] DisplacementPressure or Pressure-Flow Compensated Piston PumpsNo. 6-617 January 19982 Model 70523 Table of ContentsIntroduction .. 2 Identification .. 3 Tools Required .. 3 Parts Drawing .. 4 Parts List .. 5 - 12 Item 1 - Drive Shaft ID .. 6item 2 - Backplate Assembly .. 7 Item 4 - Compensator Assembly and Parts List .. 8 - 9 Factory Pre-set Compensator Assemblies .. 9 Item 3 - Housing Identification .. 10 Item 5 - Rotating Kit .. 10 Mounting Kits .. 11 Product Number .. 12 Repair Information .. 13 - 15 Disassembly .. 13 Inspection .. 14 Reassembly .. 14 - 15 Start-up Procedure .. 16 Fault - Logic Troubleshooting .. 17 - 19 IntroductionThis manual provides service Information for the Eaton Models 70523 Pressure or Pressure - FlowCompensated Piston Pumps. Step by step instructions for the complete disassembly, inspection, andreassembly of the pump are given.

2 The following recommendations should be followed to insure the pump from the is extremely the port areas thoroughly before disconnecting the hydraulic the pump ports and cover the open hydraulic lines immediately after they're the oil and clean the exterior of the pump before making all metal Parts in clean compressed air to dry the Parts . Do not wipe them dry with paper towels or compressed air should be filtered and moisture use new seals when reassembling hydraulic the new rubber seals with a petroleum jelly (Vaseline) before all bolts over gasketed joints, then repeat the torquing sequence to make-up for the accuracy of pump repairs on an authorized test stand is 70523 Identification Numbers - Pressure or Pressure-Flow Compensated Piston PumpStamped on each units mounting - Product Number Description70523 = Single Piston Pump70553 = Single Piston Pump, w/ Aux.

3 FlangeB - RotationL - Left Hand (CCW)R - Right Hand (CW)C - Sequential NumberingSingle Pump - Product Number:7 0 5 2 3 - R A AASerial Number Code:B 93 01 31 JBTesters InitialsDay of Month (two digits)Month (two digits)Revision level of Parts two digits of year built.( 93 for 1993 etc.)BCYear Manufactured(1 for 1991 etc.)Change CodeSerial Number Code prior to Jan., 1992:1 B- 52- JBTesters InitialsWeek of YearIdentification and Tools Required 3/8 Inch Socket 9/16 Inch End Wrench 1-1/2 Inch End Wrench 11/16 Inch End Wrench Rachet Wrench Torque Wrench (100 ) 3/16 Inch Hex Key (Allen) 3/16 Inch Hex Key (Allen Socket) Soft Face Hammer Internal Retaining Pliers (Straight .070 Tip) External Retaining Pliers (Straight .070 Tip) Regular or Locking Pliers Seal Driver or Similar Tool Petroleum Jelly (Such as Vaseline) 1/2 inch x 1-3/8 inch flat washer (2 ea.)

4 5/8 inch x 1-3/4 inch flat washer (1 ea.) 1/2 inch x 4-1/2 inch Cap screw (1 ea.) 1/2 inch NutTools Required4 Model 70523 PartsDrawingPump drawn below is typical of a righthand (CW) rotation left (CCW) or right (CW) directionsgiven are viewed from the input shaft end of the (Cover only)201114815242313181791212262516 Serial code and assembly number location31213161920272830293025 Model 70523 Parts ListItemPart 1 Drive Shaft (Identification drawing on page #6)2 1 Backplate Assembly (Identification drawing on page #7)3 1 Housing Assembly (Identification drawing on page #10)3-177010-91 Bearing4 1 Compensator Assembly (Identification drawing on page #8 & 9)5 1 Rotating Kit Assembly ( Parts list on page #10)670523-6051 Camplate770523-4231 Control Piston816026-6081 Roll Pin916028-6042 Dowel Pin1070523-6182 Cover1116048-3291 Washer+ 1216077-343 Retaining Ring+ 1316078-222 Retaining Ring1416147-4124 Cap Screw1516241-22331 Thrust Bearing1616241-C22332 Thrust Bearing Race1717091-121 Spring1870420-351 Pivot Button1970500-1002 Inner Race2070500-1012 Thrust Bearing2170500-6002 Trunnion Cover+ 2270500-6041 Gasket2370523-4001 Spring Collar+ 2470523-6101 Gasket+ 2516232-221 Shaft Seal2516233-221 Shaft Seal, Drive (fluorocarbon rubber)+ 2616003-408-90 1O-ring, mm Dia.

5 X mm ID. [.0937 in. Dia. x .375 in. ID.]+ 2716004-32O-ring, mm Dia. x mm ID. [.125 in. Dia. x in. ID.]2716004-4032O-ring, mm Dia. x mm ID. [.125 in. Dia. x in. ID.] (fluorocarbon)2816246-6121 Key, Used on [ ] diameter shaft2916032-7344 Cap Screw3016032-7202 Cap Screw3270400-6461 Mount Adapter, SAE "A" to "B" flange3316147-6102 Cap Screw3416007-141O-ring, (In K2 & K3 kit)3570411-6171 Coupler, for 9 tooth spline3570411-6041 Coupler, for 13 tooth splineMounting Kits (Drawings and Parts list on Page #11)K270442-9291 Gear Pump Mounting KitK370142-9151 Cover Plate Kit, (for "A" SAE flange)K6990596-0001 Cover Plate Kit, (for "B" SAE flange)Seal Repair Kit 70523-9001 Seal Repair KitLegend Refer to specific item Parts list.+Included in seal Repair kits 70523 Item 1 Drive Shaft IdentificationItem 1 - Drive Shaft IdentificationPart NumberInput DriveOutput Drive70552-200, 14 Tooth 70502-200, 14 Tooth70502-202, [ ] Dia.

6 Keyed9 ToothExternal13 ToothExternal9 ToothExternal70552-203, 14 Tooth70552-209, [ ] Dia. Keyed Used with 2-bolt A Flange backplateUsed with 2-bolt B Flange backplateUsed with 2-bolt A Flange backplate7 Model 70523 Item 2 - Backplate AssemblyItem 2 - Parts ListLefthandRighthandRotationRotationIte mPart (a)70523-30170523-3051 Opposite Side Porting, Top Mounted Compensator Backplate Assembly2(b)----70523-3411 Opposite Side Porting, Rear Mounted Compensator Backplate Assembly2(c)70553-30570553-3031 Auxiliary 2-Bolt A Flange Series 82-2, Opposite Side Porting Backplate2-116237-118161 Bearing2-270523-6141 Guide PinAll left (CCW) or right (CW) directionsgiven are viewed from the input shaft end of the Rotation(CCW)Righthand Rotation(CW)Righthand Rotation(CW)2(a)Top Mounted Compensator2(b) Rear Mounted Compensator2(c)Top Mounted Compensatorw/ "A" SAE Aux. FlangeLefthand Rotation(CCW)2-12-2(Loctited)8 Model 70523 Item 4 - Compensator Assembly4-14-24-34-44-34-54-64-74-84-94- 104-114-124-134-144-154-164-174-184-194- 204-214-114-224-22-1 Lefthand (CCW) Pump RotationRighthand (CW) Pump RotationFor Both Pump RotationsPressure-Flow CompensatorPressure Compensator4(a) 70523-FW4(b) 70523-FU4(c) 70523-FT*4-11, Cover not included with non-set compensator assy.

7 *4-11 Cover*4-11 Cover*4-11 Covernon-setnon-setnon-set9 Model 70523 Item 4 - Compensator Parts ListItem 4 - Parts List (Refer to drawings)ItemPart (a)70523-FW1 Non-Set Pressure-Flow Compensator Assembly, Lefthand Rotation4(b)70523-FU1 Non-Set Pressure-Flow Compensator Assembly, Righthand Rotation4(c)70523-FT1 Non-Set Pressure Compensator Assembly4-1N/S1 Compensator Body4-2N/S1 Pressure Spool4-370523-5012 Spring Pivot4-417122-81 Spring+4-516003-7-901O-ring, mm Dia. x mm [.0625 in. Dia. x .375 in. ]4-670500-6281 Pressure Rod+4-716015-241O-ring, mm Dia. x mm [.0937 in. Dia. x in. ]4-870500-6271 Adjustment Cap, Pressure4-916138-6241 Set Screw4-1016024-61 Nut4-11*70523-618*1or2 Cover*4-12N/S1 Flow Spool4-1370500-6051 Spring Pivot4-1417046-121 Spring4-1570500-6291 Spring Pivot+4-1616003-11O-ring, mm Dia. x mm [.0625 in. Dia. x .125 in. ]4-1770500-6311 Pressure Rod+4-1816133-61O-ring, mm Dia.

8 X mm [.078 in. Dia. x .468 in. ]4-1970500-6301 Adjustment Cap, Flow4-2016139-5161 Set Screw4-2116024-51 Nut4-2216103-1042 Plug Assembly+ 4-22-116133-42O-ring, mm Dia. x mm [.072 in. Dia. x .351 in. ]Legend+Included in seal Repair kit listed on page Not Sold Separately* Covers are not included with Non-Set CompensatorPre-set Pressure-Flow Compensator AssembliesNon-SetPre-setAssemblyAssembly Pump RotationPressure SettingFlow Setting70523-FU70523-DS-01 Righthand (CW)176 bar [2550 50 lbf/in2] bar [200 10 lbf/in2]70523-FU70523-EL-01 Righthand (CW)193 bar [2800 50 lbf/in2] bar [280 10 lbf/in2]70523-FU70523-EW-01 Righthand (CW)155 bar [2250 50 lbf/in2] bar [ lbf/in2]70523-FU70523-FA-01 Righthand (CW)193 bar [2800 50 lbf/in2] bar [200 10 lbf/in2]70523-FU70523-FG-01 Righthand (CW)210 bar [3050 50 lbf/in2] bar [200 10 lbf/in2]70523-FU70523-FL-01 Righthand (CW)193 bar [2800 50 lbf/in2] bar [230 10 lbf/in2]70523-FW70523-FH-02 Lefthand (CCW)210 bar [3050 50 lbf/in2] bar [200 10 lbf/in2]70523-FW70523-FM-02 Lefthand (CCW)

9 134 bar [1950 50 lbf/in2] bar [315 10 lbf/in2]Pre-set Pressure Compensator AssemblyNon-SetPre-setAssemblyAssemblyPu mp RotationPressure Setting70523-FT70523-FJ-03 Both210 bar [3050 50 lbf/in2]10 Model 70523 Item 3 - Housing IdentificationItem 5 - Rotating Kit AssemblyItem 5 Rotating Kit AssemblyItemPart Kit Assembly5-1 NSS9 Piston Assembly5-2 NSS1 Spider5-3 NSS1 Spider Pivot5-4 NSS1 Retainer5-5 NSS1 Piston Block5-6 NSS3 Pins5-7 NSS1 Washer5-8 NSS1 Spring5-9 NSS1 Retaining RingNSS - Not Sold SeparatelyItem 3 Housing IdentificationItemPart Machined370500-303B70500-311A70500-332A, B"B" Drain SAE Straight Thd."A" Drain SAE Straight (CW)Leftside (CCW)Top of Pump5-15-25-35-55-45-65-75-85-9511 Model 70523 Mounting KitsKit 2, Gear Pump Mounting(To Mount "A" SAE flanges)ItemPart Pump Mounting KitK2-116007-141O-ring, mm Dia. x mm ID. [.0625 in. Dia.]

10 X in. ID.]K2-216048-1132 WasherK2-316032-6122 Cap ScrewsKit 3 & 6, Cover PlatesFor "A" SAE FlangesItemPart Plate Kit for "A" SAE flangeK3-116007-141O-ring, mm Dia. x mm ID. [.0625 in. Dia. x in. ID.]K3-270142-6001 Cover PlateK3-316032-6102 Cap ScrewsFor "B" SAE Flanges (Not Pictured)ItemPart Plate Kit for "B" SAE flangeK6-1102919-0001 GasketK6-2250073-0001 Cover PlateK6-395865-1002 Cap ScrewsK6-4101896-0502 Lock WasherK2-1K2-2K2-3K3-1K3-2K3-312 Model 70523 This list of product numbers is to aid in Item your product number is not listed contact your Eaton 70523, Lefthand Rotation (CCW)Description of part NumberProductDrive ShaftBackplate #1 Item #2 Item #3 Item #470523-LAA70502-20070523-30170500-30370 523-FJ-0370523-LAB70502-20070523-3017050 0-30370523-FH-0270523-LBF70502-20270523- 30170500-30370523-FH-0270523-LBG70502-20 270523-30170500-30370523-FJ-0370553-LAB7 0552-20070553-30570500-30370523-FH-02705 53-LAK70552-20970553-30570500-30370523-F H-0270553-LAR70552-20370553-30570500-303 70523-FH-02 Model 70523, Righthand Rotation (CW)