Service Repair Manual
Models
303.5E Mini Hydraulic Excavator
303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303.5E MINI HYD EXCAVATOR SFH Configuration: 303.5E Mini Hydraulic Excavator SFH00001-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
i04778099
Swing Motor and Swing Drive - Disassemble SMCS - 5058-015-ZW; 5459-015
Disassembly Procedure Table 1 Required Tools Tool
Part Number
Part Description
Qty
A
9S-9152
Bearing Puller Gp
1
B
126-7183
Crossblock
1
C
1P-1857
Retaining Ring Pliers
1
D
1P-1859
Retaining Ring Pliers
1
Start By: a. Remove the swing motor and the swing drive.
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 1
g01250159
1. Remove bolts (1) and valve assembly (2).
Illustration 2
g01250160
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.
2. Remove plug (3), the O-ring seal, and spring (4). 3. Remove plug (8), the O-ring seal, shim (9), and spring (10). 4. Remove plug (7), the O-ring seal, and spool (6). 5. Remove plug (12), the O-ring seal, and spool (11). 6. Remove O-ring seals (5).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 3
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7. Remove check valve (13) and check valve (14).
Illustration 4
g01250163
8. Remove backup ring (15), O-ring seal (16), backup ring (17), and O-ring seal (18) from check valve (13). 9. Repeat Step 8 for check valve (14).
Illustration 5
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10. Remove bolts (19) and head (20).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 6
g01250164
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.
11. Remove bolts (21) and plate (22).
Illustration 7
g01250167
12. Remove swashplate (24) and shaft assembly (23) from plate (22).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 8
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g01250168
13. Use Tooling (A) and a suitable press in order to remove bearing (25) from shaft assembly (23).
Illustration 9
g01250171
14. Remove spring assembly (26).
Illustration 10
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15. Install Tooling (B). 16. Apply approximately 345 kPa (50 psi) of shop air pressure in order to remove piston (27).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 11
g01250173
17. Remove rotating group (28).
Illustration 12
g01250174
18. Remove pistons (29), retainer (30), and bearing (31).
Illustration 13
g01250176
19. Remove pins (32) from barrel assembly (33).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 14
g01250177
Illustration 15
g01250179
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 Tooling (C) and a suitable press in order to remove retaining ring (34). 21. Remove washer (37), spring (36), and washer (35).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 16
g01250181
22. Remove plate (39), port plate (40), and bearing (41).
Illustration 17
g01250182
23. Remove plate (42).
Illustration 18
g01250183
24. Remove gears (43), bearings (44), gear (45), and carrier (46).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 19
g01250184
25. Remove gear (47) and carrier assembly (48).
Illustration 20
g01250185
26. Use Tooling (D) in order to remove retaining ring (49). 27. Remove plate (50), gears (51), and the bearings from carrier (52).
Illustration 21
g01250186
28. Remove ring (53), retainers (54), O-ring seal (57), and ring gear (55). 29. Use a suitable press in order to remove shaft (56) and bearing cone (58).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - D...
Illustration 22
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30. Remove bearing cup (59) and lip seal (60).
Illustration 23
g01250188
31. Remove bearing cone (63) and seal (64) from shaft (56). 32. Remove bearing cup (62) from housing (61). Copyright 1993 - 2020 Caterpillar Inc.
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All Rights Reserved.
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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303.5E MINI HYD EXCAVATOR SFH Configuration: 303.5E Mini Hydraulic Excavator SFH00001-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
i04778100
Swing Motor and Swing Drive - Assemble SMCS - 5058-016-ZW; 5459-016
Assembly Procedure Table 1 Required Tools Tool
Part Number
Part Description
Qty
C
1P-1857
Retaining Ring Pliers
1
D
1P-1859
Retaining Ring Pliers
1
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 1
g01250188
1. Lower the temperature of bearing cup (62). 2. Install bearing cup (62) into housing (61). 3. Install seal (64) and bearing cone (63) onto shaft (56).
Illustration 2
g01250187
4. Lower the temperature of bearing cup (59). 5. Install lip seal (60) and bearing cup (59).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 3
g01250186
6. Install shaft (56) and bearing cone (58). 7. Install retainers (54), ring (53), ring gear (55), and O-ring seal (57).
Illustration 4
g01250185
8. Install the bearings, gears (51), and plate (50) onto carrier (52). 9. Use Tooling (D) in order to install retaining ring (49).
Illustration 5
g01250184
10. Install carrier assembly (48) and gear (47).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 6
g01250183
11. Install carrier (46), gear (45), bearings (44), and gears (43).
Illustration 7
g01250182
12. Install plate (42).
Illustration 8
g01250181
13. Install bearing (41), port plate (40), and plate (39).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 9
g01250177
Illustration 10
g01250179
Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.
14. Install washer (35), spring (36), and washer (37). 15. Use Tooling (C) and a suitable press in order to install retaining ring (34).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 11
g01250176
16. Install pins (32) into barrel assembly (33).
Illustration 12
g01250174
17. Install bearing (31), retainer (30), and pistons (29).
Illustration 13
g01250173
18. Install rotating group (28).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 14
g01251301
19. Install piston (27).
Illustration 15
g01250171
20. Install spring assembly (26).
Illustration 16
g01251332
21. Raise the temperature of bearing (25). 22. Install bearing (25) from shaft assembly (23).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 17
g01250167
23. Install shaft assembly (23) and swashplate (24) into plate (22).
Illustration 18
g01250164
Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.
24. Install plate (22) and bolts (21).
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303.5E Mini Hydraulic Excavator SFH00001-UP (MACHINE)(SEBP6443 - 09) - Doc...
Illustration 19
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g01250166
25. Install head (20) and bolts (19).
Illustration 20
g01250163
26. Install O-ring seal (18), backup ring (17), O-ring seal (16), and backup ring (15) onto check valve (13). 27. Repeat Step 26 for check valve (14).
Illustration 21
g01250161
28. Install check valve (13) and check valve (14).
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