Service Repair Manual
Models
303.5E Mini Hydraulic Excavator
303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303.5E MINI HYD EXCAVATOR RKY Configuration: 303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 Engine
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
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 RKY00001-UP (MACHINE) POWERED BY C1.8 ...
Illustration 19
9/11
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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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1...
Illustration 22
g01250160
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.
29. Install spring (4), the O-ring seal, and plug (3). 30. Install spring (10), shim (9), the O-ring seal, and plug (8). 31. Install spool (6), the O-ring seal, and plug (7). 32. Install spool (11), the O-ring seal, and plug (12). 33. Install O-ring seals (5).
Illustration 23
g01250159
34. Install valve assembly (2) and bolts (1).
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1...
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End By: a. Install the swing motor and the swing drive. Copyright 1993 - 2020 Caterpillar Inc.
Sun Mar 1 23:36:49 UTC+0800 2020
All Rights Reserved. Private Network For SIS Licensees.
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
1/2
Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303.5E MINI HYD EXCAVATOR RKY Configuration: 303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 Engine
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
i04778102
Swing Motor and Swing Drive - Install SMCS - 5058-012-ZW; 5459-012-ZW
Installation Procedure Table 1 Required Tools Tool
Part Number
A
138-7573
Link Bracket
2
B
5P-3931
Anti-Seize Compound
1
Illustration 1
Part Description
Qty
g01256193
1. Attach Tooling (A) and a suitable lifting device to swing motor and swing drive (2). The weight of swing motor and swing drive (2) is approximately 27 kg (60 lb). Install swing motor and swing drive (2).
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
Illustration 2
2/2
g01256191
2. Apply Tooling (B) to bolts (3). Install bolts (3) into swing motor and swing drive (2).
Illustration 3
g01256189
3. Connect hose assemblies (1) to the rear and to the left side of swing motor and swing drive (2). End By: a. Install platform. Copyright 1993 - 2020 Caterpillar Inc.
Sun Mar 1 23:37:46 UTC+0800 2020
All Rights Reserved. Private Network For SIS Licensees.
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
1/4
Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303.5E MINI HYD EXCAVATOR RKY Configuration: 303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 Engine
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
i06753331
Hydraulic Tank - Remove SMCS - 5056-011
Removal Procedure Table 1 Required Tools Tool
Part Number
A
439-3938
Part Description Link Bracket
Qty 2
Start By: a. Remove the main control valve. Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes to prevent fluid loss and to keep contaminants from entering the system. Note: Cleanliness is an important factor. Before you begin the removal procedure, thoroughly clean the exterior of the components to prevent dirt from entering the internal mechanism.
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
Illustration 1
2/4
g02836826
1. Remove bolts (1) and remove fender (2).
Illustration 2
g02836837
2. Remove tube assembly (3). Loosen clamp and remove hose (4). Disconnect hose assemblies (5), (6), and (7).
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
Illustration 3
3/4
g02836881
3. Disconnect hose (9) from the bottom of hydraulic oil tank (8).
Illustration 4
g02836937
Illustration 5
g02836896
4. Attach Tooling (A) and a suitable lifting device to hydraulic oil tank (8). The weight of hydraulic oil tank (8) is approximately 68 kg (150 lb). Remove bolts (10) and remove hydraulic oil tank (8). Copyright 1993 - 2020 Caterpillar Inc.
Sun Mar 1 23:38:43 UTC+0800 2020
All Rights Reserved.
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
1/3
Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303.5E MINI HYD EXCAVATOR RKY Configuration: 303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 Engine
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
i06753585
Hydraulic Tank - Install SMCS - 5056-012
Installation Procedure Table 1 Required Tools Tool
Part Number
A
439-3938
Part Description Link Bracket
Qty 2
Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.
Illustration 1
g02836937
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
Illustration 2
2/3
g02836896
1. Attach Tooling (A) and a suitable lifting device to hydraulic oil tank (8). The weight of hydraulic oil tank (8) is approximately 68 kg (150 lb). Install hydraulic oil tank (8) and bolts (10).
Illustration 3
g02836881
2. Connect hose (9) to the bottom of hydraulic oil tank (8).
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303.5E Mini Hydraulic Excavator RKY00001-UP (MACHINE) POWERED BY C1.8 ...
Illustration 4
3/3
g02836837
3. Install hose assemblies (5), (6), and (7). Connect hose assembly and tighten clamp (4). Install tube assembly (3).
Illustration 5
g02836826
4. Install fender (2) and bolts (1). End By: a. Install the main control valve. Copyright 1993 - 2020 Caterpillar Inc.
Sun Mar 1 23:39:39 UTC+0800 2020
All Rights Reserved. Private Network For SIS Licensees.
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