303.5D CR, 304D CR, 305D CR and 305.5D CR Mini Hydraulic Excavators Machine Systems Final Drive and Travel Motor - Disassemble Caterpillar

Disassembly Procedure

Start By:

1. Remove the final drive and the travel motor. Refer to , "Final Drive and Travel Motor - Remove".

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Illustration 1	g01242982

1. Remove plug (2), ring (1), and cover (3).
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   Illustration 2	g01242984

2. Remove bolts (4) and retainer (5).
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   Illustration 3	g01242987

3. Remove gears (6), gear (8), and bearings (7).
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   Illustration 4	g01242988

4. Remove washer (10) and carrier (9).
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   Illustration 5	g01242989

5. Remove bolts (11) and retainers (12).
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   Illustration 6	g01242991

6. Remove gears (13), gear (15), and bearings (14).
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   Illustration 7	g01242992

7. Remove washers (16), coupling (17), washer (18), and setscrews (19).
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   Illustration 8	g01242996

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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.

8. Remove plug (20) and the O-ring seal.
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   Illustration 9	g01242998

9. Remove spring (21).
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   Illustration 10	g01243000

10. Remove poppet (22).

11. Repeat Step 8 through Step 10 for the opposite side.
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    Illustration 11	g01243001

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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.

12. Remove bolts (24) and head (23).
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    Illustration 12	g01243003

13. Remove port plate (25) and bearing (26).
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    Illustration 13	g01243004

14. Remove O-ring seals (28), O-ring seal (27), and springs (29).
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    Illustration 14	g01243005

15. Install Tooling (A).

16. Apply approximately 345 kPa (50 psi) of shop air pressure in order to remove piston (30).
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    Illustration 15	g01243006

17. Remove O-ring seals (31).
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    Illustration 16	g01243007

18. Remove barrel (32), discs (33), and plates (34).
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    Illustration 17	g01243008

19. Remove pins (35).
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    Illustration 18	g01243009

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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.

20. Use a suitable press and Tooling (B) in order to remove retaining ring (36).
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    Illustration 19	g01243011

21. Remove washers (37) and spring (38).
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    Illustration 20	g01243012

22. Remove pistons (39), bearing (41), and retainer (40).
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    Illustration 21	g01243013

23. Remove swashplate (42).
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    Illustration 22	g01243015

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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.

24. Remove piston (43) and rockers (44).

25. Remove shaft assembly (45).
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    Illustration 23	g01243016

26. Remove spring (45) and seal (47).
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    Illustration 24	g01372200

27. Use Tooling (D) in order to remove bearing (48A) from shaft (45).
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    Illustration 25	g01243018

28. Use Tooling (C) in order to remove nut (48).
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    Illustration 26	g01243019

29. Remove ring gear assembly (49) from motor housing (50).
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    Illustration 27	g01243021

30. Remove Duo-Cone Seal Gp (51) and bearing (52).
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    Illustration 28	g01243022

31. Remove Duo-Cone Seal Gp (53).