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IT14G Integrated Toolcarrier and 914G Wheel Loader Power Train Caterpillar


Piston Motor (Hydrostatic) - Disassemble

Usage:

IT14G 1WN

Disassembly Procedure

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Table 1
REQUIRED TOOLS    
Tool     Part Number     Part Description     Quantity    
A     1P-1853     Snap Ring Pliers     1    
B     1P-1861     Snap Ring Pliers     1    
C     4C-3085     Puller Group     1    
D     1P-1863     Snap Ring Pliers     1    
E     8B-7551     Bearing Puller     1    
F     5P-7295     Sleeve     1    

Start By:

  1. Remove the hydrostatic piston motor. Refer to Disassembly and Assembly, "Piston Motor (Hydrostatic) - Remove".

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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.

Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.

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    Illustration 1g00480863

  1. Remove bolt (1) from solenoid assembly (2).
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    Illustration 2g00480869

  1. Install another bolt approximately 110 mm (4.3 inch) .

    Note: The longer bolt will retain the solenoid assembly from quickly dislodging when the last bolt is removed. This is due to the spring force under the solenoid assembly.

  1. Evenly remove the remaining three bolts (3) from the solenoid assembly.
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    Illustration 3g00480900

  1. Remove piston (4), spring (5), cap (6), spring (7), and four O-rings (8) .
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    Illustration 4g00480981

  1. Remove four bolts (9) and solenoid (10) from solenoid assembly (2) .
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    Illustration 5g00481043

  1. Remove cap (11), O-ring (12), backup ring (13), O-ring (14), and piston (15) from the solenoid (10) .

  1. Repeat steps number 5 and 6 to the other solenoid.
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    Illustration 6g00481045

  1. Remove spool (16), spring (17) and O-ring (18) from solenoid assembly (2) .

  1. Remove spool (21), spring (20) and O-ring (19) from solenoid assembly ( 2) .
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    Illustration 7g00481046

  1. Remove pin (22), O-ring (23), screw (24), and locknut (24) from the solenoid assembly.
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    Illustration 8g00481049

  1. Use Tooling (A) to remove snap ring (25). Remove spools (26) and (27) from the solenoid assembly.
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    Illustration 9g00481080

  1. Remove four bolts (28) and pilot valve (29) from motor head (30) .
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    Illustration 10g00481085

  1. Remove O-ring (31) and four O-rings (32) from pilot valve (29) .
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    Illustration 11g00481087

  1. Remove plug (33), O-ring (34), washer (35), spring (36) and piston (37) from pilot valve (29) .
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    Illustration 12g00481088

  1. Remove plug (38), O-ring (39), spring (40), spacer (41), spool (42), plug (45), O-ring (46), spring (44), and spacer (43) from the pilot valve.
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    Illustration 13g00481090

  1. Remove test port (50), O-ring (49), plug (48), and piston (47) from pilot valve (29) .
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    Illustration 14g00481094

  1. Remove eight bolts (51) and motor head (30) from the motor housing.
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    Illustration 15g00481095

  1. Remove two pins (52) and O-ring (53) from the motor housing. Place identification marks on adjustment screws in order to reset during assembly. Remove screws (54), and (55), and the locknuts.

  1. Remove plate (56) from the pilot valve.
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    Illustration 16g00481096

  1. Remove bolt (57) and block (58) from the pilot valve.
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    Illustration 17g00481097

  1. Remove piston (60) and pin ( 59) from the pilot valve.
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    Illustration 18g00481098

  1. Use tooling (B) to remove snap ring (61) and remove seal plate (62) from the motor housing.
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    Illustration 19g00481122
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    Illustration 20g00481123

  1. Use Tooling (C) to remove the drive shaft.
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    Illustration 21g00481124

  1. Remove barrel assembly (63) from shaft (64) .
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    Illustration 22g00481255

  1. Remove spacer (65) and spring (66) from the barrel assembly.
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    Illustration 23g00481340

  1. Use tooling (D) to remove snap ring (67) and plate (68) .
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    Illustration 24g00481360

  1. Use Tooling (E) and a press to remove the bearing (69), shim (70), and bearing (71) from the drive shaft.
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    Illustration 25g00481362

  1. Remove fourteen screws (72), plate (73), pin (74), and seven pistons (75). Remove rings (76) from the pistons.
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    Illustration 26g00481364

  1. Remove seal (77) from the motor housing.

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