The document provides instructions for disassembling the final drive and travel motor of a 305.5E Mini Hydraulic Excavator. It lists the required tools and outlines 38 steps to remove parts like gears, bearings, springs, pistons, seals and other components. Safety warnings are included to make sure protective equipment is worn when removing parts with spring forces.

1. Service Repair Manual
Models
305.5E Mini Hydraulic Excavator

2. Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 305.5E MINI HYD EXCAVATOR YGB
Configuration: 305.5E Mini Hydraulic Excavator YGB00001-UP (MACHINE)
Disassembly and Assembly
303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine
Systems
Media Number -UENR0148-04 Publication Date -01/10/2016 Date Updated -25/10/2016
i06024633
Final Drive and Travel Motor - Disassemble
SMCS - 4050-015; 4351-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-9895 Crossblock 1
B 1P-1857 Retaining Ring Pliers 1
C 9S-9152 Bearing Puller Gp 1
D 289-6052 Spanner Wrench 1
Start By:
A. Remove the final drive and the travel motor.
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3. Illustration 1 g01244969
Illustration 2 g01244970
1. Remove plug (1) .
2. Remove wire (2) and cover (1A) .
Illustration 3 g01244971
3. Remove O-ring seal (3) .
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4. Illustration 4 g01244973
4. Remove plate (4) .
Illustration 5 g01244975
5. Remove gears (5) and bearings (6) .
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5. Illustration 6 g01244977
6. Remove gear (8) and carrier (7) .
Illustration 7 g01244979
7. Remove screws (9) , ring (10) , and gear (11) .
Illustration 8 g01244980
8. Remove gears (12) and bearings (13) .
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6. Illustration 9 g01244981
9. Remove washers (14) .
Illustration 10 g01244982
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 (15) and the O-ring seal.
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7. Illustration 11 g01244984
11. Remove spring (16) .
Illustration 12 g01244985
12. Remove plug (17) and the O-ring seal.
Illustration 13 g01244986
13. Remove spool (18) .
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8. Illustration 14 g01244987
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.
14. Remove plug (19) and the O-ring seal.
Illustration 15 g01244988
15. Remove retainer (20) and spring (21) .
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9. Illustration 16 g01244989
16. Remove spool (22) .
Illustration 17 g01244991
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.
17. Remove bolts (23) and head (24) .
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10. Illustration 18 g01244992
18. Remove port plate (25) , bearing (27) , and pins (26) .
Illustration 19 g01244993
19. Remove springs (28) from piston (32) .
20. Remove O-ring seal (29) , O-ring seals (30) , and O-ring seals (31) .
Illustration 20 g01244994
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11. 21. Install Tooling (A) .
22. Apply approximately 345 kPa (50 psi)of shop air pressure in order to remove piston (32) .
Illustration 21 g01244996
23. Remove O-ring seals (34) and backup rings (33) .
Illustration 22 g01244997
24. Remove barrel (36) and plate (35) .
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12. Illustration 23 g01244999
25. Remove pins (37) .
Illustration 24 g01244998
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.
26. Use a suitable press and Tooling (B) in order to remove retaining ring (38) .
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13. Illustration 25 g01245000
27. Remove washers (39) , spring (41) , and washer (40) .
Illustration 26 g01245002
28. Remove bearing (43) , pistons (42) , and retainer (44) .
Illustration 27 g01245005
29. Remove swashplate (45) .
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14. Illustration 28 g01245007
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.
30. Remove pistons (46) , balls (49) , shaft (47) , and bearing (48) .
Illustration 29 g01245008
31. Use Tooling (C) in order to remove bearing (48) from shaft (47) .
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15. Illustration 30 g01245009
32. Remove springs (50) and seal (51) .
Illustration 31 g01245010
33. Remove bolts (52) .
34. Use Tooling (D) in order to remove nut (53) .
35. Remove ring gear (54) from motor housing (55) .
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16. Illustration 32 g03779864
Illustration 33 g03779867
Illustration 34 g03779907
36. Remove plug (56) . There is a count of 132 balls (57) . Remove balls (57) .
37. Remove Duo-Cone seal (58) and bearing (59) .
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17. Illustration 35 g03779912
38. Remove Duo-Cone seal (60) .
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon Feb 10 22:40:27 UTC+0800 2020
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18. Shutdown SIS
Previous Screen
Product: MINI HYD EXCAVATOR
Model: 305.5E MINI HYD EXCAVATOR YGB
Configuration: 305.5E Mini Hydraulic Excavator YGB00001-UP (MACHINE)
Disassembly and Assembly
303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine
Systems
Media Number -UENR0148-04 Publication Date -01/10/2016 Date Updated -25/10/2016
i06906730
Final Drive and Travel Motor - Disassemble
SMCS - 4050-015; 4351-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-9895 Crossblock 1
B 1P-1857 Retaining Ring Pliers 1
C 289-6053 2 Spanner Wrench 1
D 9S-9152 Bearing Puller Gp 1
Start By:
a. Remove the final drive and the travel motor.
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19. Illustration 1 g01242982
1. Remove plug (2), ring (1), and cover (3).
Illustration 2 g01242984
2. Remove bolts (4) and retainer (5).
Illustration 3 g01242987
3. Remove gears (6), gear (8), and bearings (7).
Illustration 4 g01242988
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21. 4. Remove washer (10) and carrier (9).
Illustration 5 g01242989
5. Remove bolts (11) and retainers (12).
Illustration 6 g01242991
6. Remove gears (13), gear (15), and bearings (14).
Illustration 7 g01242992
7. Remove washers (16), coupling (17), washer (18), and setscrews (19).
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22. Illustration 8 g01242996
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.
Illustration 9 g01242998
9. Remove spring (21).
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23. Illustration 10 g01243000
10. Remove poppet (22).
11. Repeat Step 8 through Step 10 for the opposite side.
Illustration 11 g01243001
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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