525C, 535C and 545C Wheel Skidders Machine Systems Caterpillar

Piston Pump (Implement, Steering, Brake) - Disassemble

Usage:

525C 525

Disassembly Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	1P-0510	Driver Group	1

Start By:

Remove the steering pump. Refer to Disassembly and Assembly, "Piston Pump (Impelement, Steering, Brake) - Remove".

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Illustration 1	g01265347

Remove the plug and needle valve (1) .

Remove bolts (2) and valve assembly (3) .

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Illustration 2	g00508025

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Personal injury can result from being struck by parts propelled by a released spring force.
Make sure to wear all necessary protective equipment.

Follow the recommended procedure and use all recommended tooling to release the spring force.

Remove three seals (4) . Remove plug (5) .

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Illustration 3	g01114431

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Personal injury can result from being struck by parts propelled by a released spring force.
Make sure to wear all necessary protective equipment.

Follow the recommended procedure and use all recommended tooling to release the spring force.

Note: Measure the distance from the body to the end of socket setscrew (13) before removal.

Remove locknut (12) . Remove socket setscrew (13) , if necessary.

Remove O-ring seal (11) , spring guide (10) , spring (9) , spring stop pin (8) , spring guide (7) , and spool (6) from valve assembly (3) .

Remove plug (14) .

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Illustration 4	g00508075

Note: Measure the distance from the body to the end of socket setscrew (21) before removal.

Remove locknut (20) . Remove socket setscrew (21) , if necessary.

Remove O-ring seal (19) , spring guide (18) , spring (17) , spring guide (16) , and spool (15) from valve assembly (3) .

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Illustration 5	g01265348

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Personal injury can result from being struck by parts propelled by a released spring force.
Make sure to wear all necessary protective equipment.

Follow the recommended procedure and use all recommended tooling to release the spring force.

Remove bolts (22) and head assembly (23) .

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Illustration 6	g00508081

Note: Raise the temperature of the head in order to remove dowel rods (26) and (27) .

Remove pin (25) and bearing cup (24) .

Remove dowel rods (26) and (27) , if necessary.

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Illustration 7	g00508729

Remove gasket (28) , coupler (29) , and plate (30) .

Remove spring (31) and pistons (32) and (33) .

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Illustration 8	g00508736
Exploded view of spring (31) , piston (33) , coupler (29) , plate (30) , and piston (32) .

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Illustration 9	g00508742

Remove bolts (34) and cover (35) .

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Illustration 10	g00508745

Remove plug (36) .

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Illustration 11	g00508767

Check the condition of O-ring seal (37) on plug (36) and O-ring seal (38) on cover (35) .

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Illustration 12	g00508769

Remove bolts (39) from each side.

Remove bearing (40) and spacer (41) from each side. Remove bearing cone (42) and the shim.

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Illustration 13	g00508771

Put identification marks on the pistons and the barrel assembly for assembly purposes. Remove barrel assembly (43) , piston (44) , and guide ring (45) .

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Illustration 14	g00508785

Remove pistons (44) and guide ring (45) from barrel assembly (43) .

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Illustration 15	g00508860

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Illustration 16	g00508861

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Personal injury can result from being struck by parts propelled by a released spring force.
Make sure to wear all necessary protective equipment.

Follow the recommended procedure and use all recommended tooling to release the spring force.

Use a suitable press and Tooling (A) to disassemble barrel assembly (43) . Compress spring (47) until Tooling (A) is below retaining ring (49) . Remove retaining ring (49) . Slowly release the compression that is on spring (47) . Remove spring (47) and washers (46) and (48) .