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IT14G Integrated Toolcarrier and 914G Wheel Loader Power Train Caterpillar


Piston Pump (Hydrostatic) - Disassemble

Usage:

IT14G 1WN

Disassembly Procedure

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Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     1P-1862     Retaining Ring Pliers     1    

Start By:

  1. Remove the piston pump. Refer to Disassembly and Assembly, "Piston Pump (Hydrostatic) - Remove".

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------ WARNING! ------

Personal injury can result from hydraulic oil pressure and hot oil.

Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.

Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.

Dispose of all fluids according to local regulations and mandates.

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    Illustration 1g00489221

  1. Remove four bolts (1) and charge pump (2) from pump control (3) .
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    Illustration 2g00489229

  1. Remove O-rings (4) and (6) from the charge pump. Remove sleeve (5) from the charge pump.
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    Illustration 3g00489280

  1. Remove gears (7) and (8). Remove shaft (9), woodruff key (10), retaining ring (11), and plate (12) from the charge pump. Remove O-ring (13) from pump control (2) .
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    Illustration 4g00489292

  1. Remove adjustment screw (14) from pump housing (15) .
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    Illustration 5g00489294

  1. Remove four bolts (16) and separate pump control (2) from pump housing (15) .
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    Illustration 6g00489299

  1. Remove O-rings (17), O-ring (18), and port plate (19) from the pump control.
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    Illustration 7g00489320

  1. Remove relief valves (20) from pump control (2) .
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    Illustration 8g00489341
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    Illustration 9g00489345

  1. Separate relief valve (21), (22), (23), and (24) into four sections. Remove O-rings (25), (26), (27), and (28) from the relief valve. Remove seal (29) and backup ring (30) from the relief valve.
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    Illustration 10g00489367

  1. Remove nut (31), piston (32), spring (33), piston (34), spring (35) and piston (36) from the four sections.
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    Illustration 11g00489369

  1. Remove plugs (37) and (38). Remove pressure tap (39) from pump control (2) .
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    Illustration 12g00489375

  1. Remove speed sensing valves (40) and (41) from the pump control.
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    Illustration 13g00489420

  1. Remove piston (42) and spring (43) from the speed sensing valve.
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    Illustration 14g00489429

  1. Remove pin (44), O-ring (45), and nut (46) from the speed sensing valve.
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    Illustration 15g00489436

  1. Remove snap ring (47), spacer (48), piston (49), O-ring (50), and nut (51) from speed sensing valve (41) .
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    Illustration 16g00489467

  1. Remove caps (52) and (53) from pump control (2) .
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    Illustration 17g00489475

  1. Remove pressure tap (54), O-ring (55), pin (56), and pin (57) from the pump control. Remove spool assembly (58) from the pump control.
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    Illustration 18g00489483

  1. Remove pin (59), spool (60), pin (61), piston (62), spring (63), piston (64), O-ring (65), nut (66), and adjustment screw (67) from the pump control.
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    Illustration 19g00489487

  1. Remove two plugs (68), four plugs (69), and pressure tap (70) from pump control (2) .
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    Illustration 20g00489489

  1. Remove sleeves (70) and (71) from the pump control.
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    Illustration 21g00489492

  1. Remove barrel assembly (72) from pump housing (15) .
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    Illustration 22g00489496

  1. Remove plate (73), piston assembly (74), ball (75) and spring shims (76) from the barrel assembly.
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    Illustration 23g00489521

  1. Remove two bolts (77), four bolts (78), and solenoid assembly (79) from the pump control.
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    Illustration 24g00489524

  1. Remove three O-rings (80), O-ring (81), and four bolts (82) from the solenoid assembly.
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    Illustration 25g00489530

  1. Remove spring (83) and solenoid (84) from the solenoid assembly.

  1. Remove cap (85), piston (86), ring (87), ring (88) and O-ring (89) from the solenoid.
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    Illustration 26g00489655

  1. Remove piston (90), O-ring (91), and spool (92) from solenoid assembly (79) .
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    Illustration 27g00489680

  1. Remove snap ring (93) from pump housing (15) .
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    Illustration 28g00489681

  1. Remove four bolts (94) and cover (95) from the pump housing.
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    Illustration 29g00489686

  1. Remove retainer (96) from flow control valve (97) .
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    Illustration 30g00489691

  1. Use a press and apply pressure to plate (98) from flow control valve (97) .

  1. Use Tooling (A) to remove snap ring (99) from flow control valve (97) .
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    Illustration 31g00489697

  1. Remove two spacers (100) from the flow control valve.
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    Illustration 32g00489720

  1. Remove nut (101) from shaft (102). Remove cap (103) from the shaft.
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    Illustration 33g00489721

  1. Remove retainer (104) and O-ring (105) from the shaft.

  1. Use a press and apply pressure to the plate. Use Tooling (A) to remove snap ring (106) and spacers (107) .
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    Illustration 34g00489726

  1. Remove shaft (102), plate (108), spring (109), spring (110), and plate (111) from the flow control valve.
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    Illustration 35g00489728

  1. Remove plate (112), spring (113), spring (114), and plate (115) from the other end of the flow control valve.
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    Illustration 36g00489731

  1. Remove O-rings (116) from both of the caps.
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    Illustration 37g00489733

  1. Remove snap ring (117) from shaft (118) .

  1. Remove shaft (118) from the pump housing.
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    Illustration 38g00489736

  1. Remove swashplate (119), guide block (120), two bearings (121), two bearing races (122), and two pins (123) from the pump housing.
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    Illustration 39g00489738

  1. Remove bearing (124) from the pump housing.
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    Illustration 40g00489739

  1. Remove two spring pins (125) from the pump housing.
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    Illustration 41g00489780

  1. Remove the remaining six plugs (126) from the pump housing.

  1. Remove adapter (127) and pressure tap (128) from the pump housing.

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