725C2, 730C2 Ejector Articulated Trucks - Machine Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove piston pump (brake, ejector and fan).

Show/hide table



Illustration 1	g00551023

1. Remove socket head bolts (3). Remove pressure and flow compensator valve (2) from pump (1) .

Show/hide table



Illustration 2	g00551251

2. Remove O-ring seals (4) from pressure and flow compensator valve (2) .

Show/hide table



Illustration 3	g00551252

3. Position flow compensator valve (2) in a soft jawed vise.

4. Remove plug (13) and seal (14) from pressure and flow compensator valve (2) .

Show/hide table

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.

5. Remove plug (17) from pressure and flow compensator valve (2) .

6. Remove cap nut (12), seal (11), adjustment nut (10), seal (9) and adjustment screw (18) from plug (17) .

7. Remove O-ring seal (16) from plug (17) .

8. Remove seat (15), spring (8), spring (7), spring retainer (6), and valve stem (5) from pressure and flow compensator valve (2) .

Show/hide table



Illustration 4	g00551260

9. Remove plug (26) and seal (27) from pressure and flow compensator valve (2) .

Show/hide table

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.

10. Remove plug (20) from pressure and flow compensator valve (2) .

11. Remove cap nut (25), seal (24), adjustment nut (22), seal (21), and adjustment screw (23) from plug (20) .

12. Remove O-ring seal (19) from plug (20) .

13. Remove seat (32), spring (31), spring (30), spring retainer ( 29), and valve stem (28) from pressure and flow compensator valve (2) .

Show/hide table



Illustration 5	g00551321

Show/hide table

Personal injury can result from parts and/or covers under spring pressure. Spring force will be released when covers are removed. Be prepared to hold spring loaded covers as the bolts are loosened.

14. Remove socket head bolts (35). Remove break off plug (34) from pump housing (33) .

Show/hide table



Illustration 6	g00551323

Show/hide table



Illustration 7	g00603421

15. Remove O-ring seals (37) from break off plug (34).

16. Remove piston guide (36) and plunger guide (38) from break off plug (34) .

17. Remove bearing cup (39) and spacer (40) from break off plug (34) .

18. Remove pin (41) from break off plug (34) .

Show/hide table



Illustration 8	g00551327

19. Remove O-ring seal (46) from pump housing (33).

20. Remove spring (44) and control piston (43) from the swashplate assembly.

21. Remove valve plate (45) from the barrel.

22. Remove roller bearing cone (42) from the pump shaft.

Show/hide table



Illustration 9	g00551331

23. Remove spacer (48) and barrel assembly (47) from pump housing (33) .

Show/hide table



Illustration 10	g00551336

24. Remove bearing (52), retainer plate (49), and nine piston assemblies (50) from swashplate assembly (51) .

Show/hide table



Illustration 11	g00551339

25. Remove swashplate assembly (51) from pump housing (33) .

Show/hide table



Illustration 12	g00551343

26. Remove pump shaft (53) and roller bearing cone (54) from pump housing (33). Remove roller bearing cone (54) from pump shaft (53) .

Show/hide table



Illustration 13	g00551349

27. Remove O-ring seal (56) from pump housing (33) .

28. Remove shaft seal (55) from pump housing (33) .

Show/hide table



Illustration 14	g00551353

29. Remove bearings (57) from pump housing (33) .

30. Remove shaft seal (59) from pump housing (33) .

31. Use Tooling (A) in order to remove ring (60) from pump housing (33) .

32. Remove roller bearing cup (58) from pump housing (33) .

Show/hide table



Illustration 15	g00551357

33. Remove O-ring plug (61) and the O-ring seal.

Show/hide table



Illustration 16	g00551360

34. Remove pin (62) from barrel (47) .

Show/hide table



Illustration 17	g00551364

Show/hide table



Illustration 18	g00551373

Show/hide table

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.

35. Position barrel (47) into a suitable press, as shown. Use Tooling (C) and the press in order to compress spring (64).

36. Use Tooling (B) to remove ring (63). Remove spring (64) and spring seat (65) from barrel assembly (47) .