Cub-cadet P Series User Manual

P SeriesHydrostatic PumpsService and Repair ManualBLN-52503August, 2010PCPJPWPRPG/PEPK

5P SeriesFigure 4. PK Pump With Standard Charge Pump EXTERNAL FEATURES - PK SERIES

95PR SeriesRefer to Figure 4.Disassembly1. Remove retaining ring (3) from housing (15).2. Remove lip seal (6). Care must be taken to preve

96 PR SeriesRefer to Figure 6.DisassemblyPerform disassembly, inspection and assembly on check valves one side at a time. Some units vary in “A” side

97PR SeriesRefer to Figure 8.Disassembly1. Loosen the bypass valve (50) using a 5/8” wrench.2. Remove the bypass (50) from the end cap

98 PR SeriesRefer to Figure 9.Disassembly1. Prior to removal of the charge pump cover, place a mark on the cover and end cap for alignment at assembl

99PR SeriesRefer to Figure 10.Disassembly1. Prior to removal of the auxiliary pump, place a mark on the auxiliary pump, charge pump (41) and end cap

100 PR SeriesRefer to Figure 11.Disassembly1. Using any combination of two, 9/16” wrenches or 9/16” socket and ratchet drive, loosen the end c

101PR SeriesRefer to Figure 12.Disassembly1. Tilt the pump on its side, drain remaining oil. Lift out the cylinder block assembly (38).2. Remove the

102 PR SeriesRefer to Figure 13.Disassembly1. Remove the block spring (20).2. Remove the thrust washer (19).3. Remove the thrust bearing and race (

103PR SeriesREMOVAL, INSPECTION AND ASSEMBLY OF INPUT SHAFTRefer to Figure 15.Disassembly1. Remove the retaining ring (3).2. Remove the lip seal (6)

104 PR SeriesRefer to Figure 16.Disassembly1. Remove and discard the trunnion seal retainer and seal (12).2. Remove the slot guide (14).3. Remove t

6 P SeriesFigure 4. PR Pump With Standard Charge Pump EXTERNAL FEATURES - PR SERIESTRUNNION ARMINPUT SHAFTCHARGE PRESSUREDIAGNOSTIC PORT“A” and “B” PO

105PR Series

106 PR SeriesFigure 17. PR PumpBOXES INDICATE ITEMS INCLUDED IN KITS. Kit Number

107PR SeriesITEM LIST - PR SERIESPart numbers are not provided in this manual. See CD (BLN-51427) for part numbers.1 Pump Shaft Kit (19T spline) Pum

108 PR Series

109PW SeriesHOW TO USE THIS MANUALEach assembly is provided with an exploded view showing the parts involved. The item reference numbers

110 PW SeriesTOOLS AND TORQUESTable 1. Required ToolsTable 2. PW Pump Torque ValuesMiscellaneousP Series Service & Repair ManualTorque WrenchScrib

111PW SeriesPrior to disassembly, note the position of the scis-sor arm brackets and the tab on the outer control arm bracket.See Figure 1.Disassembly

112 PW SeriesREMOVAL, INSPECTION AND/OR REPLACEMENT OF CONTROL ARMREMOVAL, INSPECTION AND/OR REPLACEMENT OF FAN ASSEMBLYRefer to Figure 3.Disassembly1

113PW SeriesRefer to Figure 4.Disassembly1. Remove retaining ring (3) from housing (15).2. Remove lip seal (6). Care must be taken to prev

114 PW SeriesRefer to Figure 6.DisassemblyPerform disassembly, inspection and assembly on check valves one side at a time. Some units vary in “A” side

7P SeriesEXTERNAL FEATURES - PW SERIESFigure 5. PW Pump With Standard Charge Pump CHARGE COVERSTANDARD CHECK VALVE OR SHOCK VALVESTANDARD CHECK VALVE

115PW SeriesRefer to Figure 8.Disassembly1. Loosen the bypass valve (50) using a 5/8” wrench.2. Remove the bypass (50) from the end ca

116 PW SeriesRefer to Figure 9.Disassembly1. Prior to removal of the charge pump cover, place a mark on the cover and end cap for alignment at assemb

117PW SeriesRefer to Figure 10.Disassembly1. Prior to removal of the auxiliary pump, place a mark on the auxiliary pump, charge pump (41) and end cap

118 PW SeriesRefer to Figure 11.Disassembly1. Using any combination of two, 9/16” wrenches or 9/16” socket and rachet drive, loosen the end cap bolts

119PW SeriesRefer to Figure 12.Disassembly1. Tilt the pump on its side, drain remaining oil. Lift out the cylinder block assembly (38).2. Remove the

120 PW SeriesRefer to Figure 13.Disassembly1. Remove the thrust bearing and race (17).Inspection1. Inspect the running surface of the bearing race f

121PW SeriesREMOVAL, INSPECTION AND ASSEMBLY OF INPUT SHAFTRefer to Figure 15.Disassembly1. Remove the retaining ring (3).2. Remove the lip seal (6)

122 PW SeriesRefer to Figure 16.Disassembly1. Remove trunnion seal retainer and seal (12).2. Remove the slot guide (14).3. Remove the trunnion arm

123PW Series

124 PW SeriesFigure 17. PW Pump85- Overhaul Seal KitBOXES INDICATE ITEMS INCLUDED IN KITS. Kit Number

8 P SeriesHYDRAULIC SCHEMATICFigure 6. PC, PG, PJ, PK and PR Pumps with Standard Charge PumpOrice sizeNo Bleed.024 Bleed.031 Bleed.044 BleedRelief pr

125PW SeriesITEM LIST - PW SERIESPart numbers are not provided in this manual. See CD (BLN-51427) for part numbers.1 Pump Shaft Kit (19T spline) Pum

126 PW Series

127P SeriesGLOSSARY OF TERMSAxial Piston: Type of design for hydraulic motors and pumps in which the pistons are arrangedparallel with the spindle (in

128 P SeriesHydrostatic Transmission: The combination of a hydraulic pump and motor in one housing toform a device for the control and transfer of pow

© 2010 HYDRO-GEARPrinted in U.S.A.Rev. P3

9P SeriesHYDRAULIC SCHEMATICFigure 8. PW Series Pump With Standard Charge Pump Figure 9. PW Series Pump With Auxiliary Charge Pump Orice sizeNo Bleed

10 P SeriesFigures 10 represents a graphical schematic of the P Series Pump with standard charge pump. Figure 10 provides a graphical illustration of

11P SeriesTECHNICAL SPECIFICATIONSTable 1: P Series Pump Technical SpecicationsProduct Type PC PG PJ/PK PR PWDisplacement in3/rev 0.37 0.62

12 P SeriesFigure 11. P Series Pump Conguration LabelPRODUCT IDENTIFICATIONThe label in Figure 11 is located on the pump housing. It identies the mo

13P SeriesThis symbol points out important safety instructions which, if not followed, could en-danger the personal safety and/or property of you

14 P SeriesSECTION 3. TROUBLESHOOTING WARNINGDo not attempt any servicing or ad-justments with the engine running. Use extreme caution wh

15P Series Possible Cause Corrective ActionUNIT HAS NO/LOW POWEREngine speed low Adjust to correct rpm

16 P SeriesP SERIES FLOW TEST KIT INSTRUCTIONSBLN-51334 JULY 2010(This Instruction Sheet supersedes all previous ow testing instructions)Description:

17P SeriesNote: Raising the system oil temperature will make a difference in the readings you receive. It has been determined that to complete this

18 P Series SECTION 4. SERVICE AND MAINTENANCENOTE: Any servicing dealer attempting a warranty repair must have prior approval before conducting mai

19P SeriesFLUID VOLUME AND LEVELCertain situations may require additional uid to be added or even replaced. Refer to the vehicle manufa

20 P SeriesRETURN TO NEUTRAL SETTINGWARNINGPOTENTIAL FOR SERIOUS INJURY Inattention to proper safety, operation, or maintenance procedures could resul

21PC SeriesHOW TO USE THIS MANUALEach assembly is provided with an exploded viewshowing the parts involved. The itemreference numbers in each illustra

22 PC SeriesMiscellaneous 3/8-Inch Drive Ratchet and SocketsP Series Service & Repair Manual 7/16-inch SocketTorque Wrench 1/2-Inch SocketScribe,

23PC SeriesRefer to Figure 1.Prior to disassembly, note the position of the scissorarm brackets and the tab on the outer control armbracket.Disassembl

24 PC SeriesREMOVAL, INSPECTION AND/ORREPLACEMENT OF CONTROL ARMREMOVAL, INSPECTION AND/ORREPLACEMENT OF FAN ASSEMBLYRefer to Figure 3.Disassembly1. R

Table of ContentsSection PageDescription and Operation ...

25PC SeriesRefer to Figure 4.Disassembly1. Remove retaining ring (22) from housing.2. Remove lip seal (20). Care must be taken toprevent damage to th

26 PC SeriesRefer to Figure 6.Perform disassembly, inspection and assembly onshock valve one side at a time. Some units vary in“A” side to “B” side co

27PC SeriesRefer to Figure 8.Disassembly1. Prior to removal of the charge pump cover, placea mark on the cover and end cap for alignmentat assembly.2.

28 PC SeriesRefer to Figure 9.Disassembly1. Prior to removal of the auxiliary pump, place amark on the auxiliary pump (6), charge pump(7) and end cap

29PC SeriesRefer to Figure 10.Disassembly1. Remove charge pump. (See page 27).2. Using a 10 mm wrench, loosen the end cap bolts(4) evenly.3. Hold the

30 PC SeriesRefer to Figure 11.Disassembly1. Remove charge pump. (See page 27).2. Remove end cap. (See page 29).3. Tilt the pump on its side and drain

31PC SeriesRefer to Figure 12.Disassembly1. Remove the block spring (29).2. Remove the thrust bearing and races (34).Inspection1. Inspect and replace

32 PC SeriesRefer to Figure 14.Disassembly1. Remove the retaining ring (22).2. Remove the lip seal (20).3. Remove the spacer (21).3. Remove the shaft

33PC SeriesREMOVAL, INSPECTION ANDINSTALLATION OF TRUNNION ARMRefer to Figure 15.Disassembly1. Remove the slot guide (38).2. Remove and discard the tr

34 PC SeriesFigure 16. PC PumpBOXES INDICATE ITEMS INCLUDED IN KITS.Kit Number

P Series ivFOREWORDHeadquartered in Sullivan, Illinois, Hydro-Gearis a world leader in the design, manufacture, andservice of quality hydrostatic tran

35PC SeriesITEM LIST - PC SERIESPart numbers are not provided in this manual. See CD (BLN-51427) for part numbers.No. Description1 Housing Kit2 End Ca

36 PC Series

37PG / PE SeriesHOW TO USE THIS MANUALEach assembly is provided with an exploded view showing the parts involved. The item reference numb

38 PG / PE SeriesTOOLS AND TORQUESTable 1. Required ToolsTable 2. PG / PE Pump Torque ValuesMiscellaneousP Series Service & Repair ManualTorque Wr

39PG / PE SeriesPG AND PE SERIES PUMP REPAIRREMOVAL, INSPECTION AND/OR REPLACEMENT OF RETURN TO NEUTRAL ASSEMBLYFigure 1. PG / PE Pump Return to Neutr

40 PG / PE SeriesREMOVAL, INSPECTION AND/OR REPLACEMENT OF CONTROL ARMREMOVAL, INSPECTION AND/OR REPLACEMENT OF FAN ASSEMBLYRefer to Figure 3.Disassem

41PG / PE SeriesRefer to Figure 4.Disassembly1. Remove retaining ring (22) from housing.2. Remove lip seal (20). Care must be taken to prevent dam

42 PG / PE SeriesRefer to Figure 6.DisassemblyPerform disassembly, inspection and assembly on check valves one side at a time. Some units vary in “A”

43PG / PE SeriesRefer to Figure 8.Disassembly1. Loosen the bypass valve (15) using a 5/8” wrench.2. Remove the bypass (15) from the end cap (

44 PG / PE SeriesRefer to Figure 9.Disassembly1. Prior to removal of the charge pump cover, place a mark on the cover and end cap for alignment at as

45PG / PE SeriesRefer to Figure 10.Disassembly1. Prior to removal of the auxiliary pump, place a mark on the auxiliary pump, charge pump (7) and end

46 PG / PE SeriesRefer to Figure 11a and 11b.Disassembly1. Using a 10 mm wrench, loosen the end cap bolts (4) evenly.2. Keeping the end cap (2) hel

47PG / PE SeriesRefer to Figure 12.Disassembly1. Tilt the pump on its side, drain remaining oil. Lift out the cylinder block assembly (25).2. Remove

48 PG / PE SeriesRefer to Figure 13.Disassembly1. Remove the block spring (29).2. Remove the block thrust washer (30).3. Remove the thrust bearing

49PG / PE SeriesREMOVAL, INSPECTION AND ASSEMBLY OF INPUT SHAFTRefer to Figure 15.Disassembly1. Remove the retaining ring (22).2. Remove the lip sea

50 PG / PE SeriesRefer to Figure 16.Disassembly1. Remove the slot guide (38).2. Remove and discard the trunnion seal retainer and seal (49).3. Remo

51PG / PE Series

52 PG / PE SeriesFigure 17. PG / PE PumpBOXES INDICATE ITEMS INCLUDED IN KITS. Kit Number

53PG / PE SeriesITEM LIST - PG AND PE SERIESPart numbers are not provided in this manual. See CD (BLN-51427) for part numbers.No. Description1 Hou

54 PG / PE Series

1P SeriesIn some applications of the P Series Pumps, it is desirable to move the machine for short distances at low speeds without operating the engin

55PJ SeriesHOW TO USE THIS MANUALEach assembly is provided with an exploded viewshowing the parts involved. The itemreference numbers in each illustra

56 PJ SeriesTOOLS AND TORQUESTable 1. Required ToolsTable 2. PJ Pump Torque ValuesMiscellaneousP Series Service & Repair ManualTorque WrenchScribe

57PJ SeriesPJ SERIES PUMP REPAIRREMOVAL, INSPECTION AND/ORREPLACEMENT OF RETURN TONEUTRAL ASSEMBLYFigure 1. PJ Pump Return to NeutralRefer to Figure 1

58 PJ SeriesREMOVAL, INSPECTION AND/ORREPLACEMENT OF CONTROL ARMREMOVAL, INSPECTION AND/ORREPLACEMENT OF FAN ASSEMBLYRefer to Figure 3.Disassembly1. R

59PJ SeriesRefer to Figure 4.Disassembly1. Remove retaining ring (22) from housing.2. Remove lip seal (20). Care must be taken toprevent damage to th

60 PJ SeriesRefer to Figure 6.Perform disassembly, inspection and assembly oncheck valves one side at a time. Some units vary in“A” side to “B” side c

61PJ SeriesRefer to Figure 8.Disassembly1. Loosen the bypass valve (15) using a 5/8”wrench.2. Remove the bypass (15) from the end cap (2).Inspection1.

62 PJ SeriesRefer to Figure 9.Disassembly1. Prior to removal of the charge pump cover, placea mark on the cover and end cap for alignmentat assembly.2

63PJ SeriesRefer to Figure 10.Disassembly1. Prior to removal of the auxiliary pump, place amark on the auxiliary pump, charge pump (7)and end cap (2)

64 PJ SeriesRefer to Figure 11.Disassembly1. Remove charge pump. (See page 62).2. Using a 10 mm wrench, loosen the end cap bolts(4) evenly.3. Hold the

2 P SeriesEXTERNAL FEATURES - PC SERIESFigure 1. PC Pump with Standard Charge Pump

65PJ SeriesRefer to Figure 12.Disassembly1. Remove charge pump. (See page 62).2. Remove end cap. (See page 64).3. Tilt the pump on its side and drain

66 PJ Series1. Install thrust bearing and race assembly (34).2. Install the block thrust washer (30).3. Install block spring (29).Refer to Figure 13.

67PJ SeriesREMOVAL, INSPECTION ANDASSEMBLY OF INPUT SHAFTRefer to Figure 15.Disassembly1. Remove the retaining ring (22).2. Remove the lip seal (20).3

68 PJ SeriesRefer to Figure 16.Disassembly1. Remove the slot guide (38).2. Remove and discard the trunnion seal retainerand seal (49).3. Remove the tr

69PJ Series

70 PJ SeriesFigure 17. PJ PumpBOXES INDICATE ITEMS INCLUDED IN KITS.Kit Number

71PJ SeriesITEM LIST - PJ SERIESPart numbers are not provided in this manual. See CD (BLN-51427) for part numbers.No. Description1 Housing Kit2 End Ca

72 PJ Series

73PK SeriesHOW TO USE THIS MANUALEach assembly is provided with an exploded viewshowing the parts involved. The itemreference numbers in each illustra

74 PK SeriesTOOLS AND TORQUESTable 1. Required ToolsTable 2. PK Pump Torque ValuesMiscellaneousP Series Service & Repair ManualTorque WrenchScribe

3P SeriesFigure 2. PG Pump With Standard Charge Pump EXTERNAL FEATURES - PG SERIESSAE “A” PADFLANGE STYLECHARGEPRESSUREDIAGNOSTICPORTINPUT SHAFTINLET“

75PK SeriesRefer to Figure 1.Prior to disassembly, note the position of the scissorarm brackets and the tab on the outer control armbracket.Disassembl

76 PK SeriesREMOVAL, INSPECTION AND/ORREPLACEMENT OF CONTROL ARMREMOVAL, INSPECTION AND/ORREPLACEMENT OF FAN ASSEMBLYRefer to Figure 3.Disassembly1. R

77PK SeriesRefer to Figure 4.Disassembly1. Remove retaining ring (22) from housing.2. Remove lip seal (20). Care must be taken toprevent damage to th

78 PK SeriesRefer to Figure 6.Perform disassembly, inspection and assembly oncheck valves one side at a time. Some units vary in“A” side to “B” side c

79PK SeriesRefer to Figure 8.Disassembly1. Loosen the bypass valve (15) using a 5/8”wrench.2. Remove the bypass (15) from the end cap (2).Inspection1.

80 PK SeriesRefer to Figure 9.Disassembly1. Prior to removal of the charge pump cover, placea mark on the cover and end cap for alignmentat assembly.2

81PK SeriesRefer to Figure 10.Disassembly1. Prior to removal of the auxiliary pump, place amark on the auxiliary pump, charge pump (7)and end cap (2)

82 PK SeriesRefer to Figure 11.Disassembly1. Remove charge pump. (See page 62).2. Using a 10 mm wrench, loosen the end cap bolts(4) evenly.3. Hold the

83PK SeriesRefer to Figure 12.Disassembly1. Remove charge pump. (See page 80.2. Remove end cap. (See page 82).3. Tilt the pump on its side and drain r

84 PK Series1. Install thrust bearing and race assembly (34).2. Install the block thrust washer (30).3. Install block spring (29).Refer to Figure 13.

4 P SeriesEXTERNAL FEATURES - PJ SERIESFigure 3. PJ Pump with Standard Charge Pump

85PK SeriesREMOVAL, INSPECTION ANDASSEMBLY OF INPUT SHAFTRefer to Figure 15.Disassembly1. Remove the retaining ring (22).2. Remove the lip seal (20).3

86 PK SeriesRefer to Figure 16.Disassembly1. Remove the slot guide (38).2. Remove and discard the trunnion seal retainerand seal (49).3. Remove the tr

87PK Series

88 PK SeriesFigure 17. PK PumpBOXES INDICATE ITEMS INCLUDED IN KITS.Kit Number

89PK SeriesITEM LIST - PK SERIESPart numbers are not provided in this manual. See website for part numbers.No. Description1 Housing Kit2 End Cap Kit (

90 PK Series

91PR SeriesHOW TO USE THIS MANUALEach assembly is provided with an exploded view showing the parts involved. The item reference numbers i

92 PR SeriesTOOLS AND TORQUESTable 1. Required ToolsTable 2. PR Pump Torque ValuesMiscellaneousP Series Service & Repair ManualTorque WrenchScribe

93PR SeriesPrior to disassembly, note the position of the scis-sor arm brackets and the tab on the outer control arm bracket.See Figure 1.DisassemblyC

94 PR SeriesREMOVAL, INSPECTION AND/OR REPLACEMENT OF CONTROL ARMREMOVAL, INSPECTION AND/OR REPLACEMENT OF FAN ASSEMBLYRefer to Figure 3.Disassembly1.