Caterpillar Cat 303.5E Mini Hydraulic Excavator (Prefix RKY) Service Repair Manual (RKY00001 and up)

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

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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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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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