Caterpillar Cat 307C Mini Hydraulic Excavator (Prefix BNE) Service Repair Manual (BNE00001 and up)

Service Repair Manual

Models

307C and 307CSB Mini Hydraulic Excavator

307C & 307C SB Excavators BNE00001-UP (MACHINE) POWERED BY 4M40 En...

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 307C MINI HYD EXCAVATOR BNE Configuration: 307C & 307C SB Excavators BNE00001-UP (MACHINE) POWERED BY 4M40 Engine

Disassembly and Assembly 307C Excavator Machine Systems Media Number -RENR4029-02

Publication Date -01/03/2005

Date Updated -29/03/2005

i06217162

Final Drive and Travel Motor - Assemble SMCS - 4050-016; 4351-016

Assembly Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

A

-

Loctite 242

-

B

-

Loctite High Flex Film

-

C

FT3209

Retainer Nut Wrench As.

1

D

FT3208

Retainer Nut Wrench

1

E

9S-7353

Torque Wrench

1

F

6V-2055

Grease

1

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Illustration 1

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1. Using a suitable press, install the bearing (72) onto the shaft (71) .

Illustration 2

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2. Install the shaft (71) and bearing (72) into the body casing. Install the floating seal (73) onto the body casing (74) . Refer to Disassembly and Assembly, "Duo Cone Seal - Install".

Illustration 3

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3. Install angular bearing (70) and floating seal (69) onto the gear casing. Refer to Disassembly and Assembly, "Duo Cone Seal - Install"

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Illustration 4

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4. Position gear casing as shown and install angular bearing (68) onto the gear casing.

Illustration 5

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5. Using a suitable lifting device, install gear casing (49) onto the body casing.

Note: After installing the gear casing onto the body casing , there will be a gap between two components. The gap will be eliminated by installing and adjusting the ring nut (67) .

6. Use the following procedure to adjust the preload of the angular bearings (68) and (70) .

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Illustration 6

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a. Install ring nut (67) . Use tooling (C) and tighten the ring nut (67) until there is no gap between body casing, two bearings, gear casing, and ring nut. b. Rotate gear casing (49) several turns. c. Install and tighten one sprocket bolt into the sprocket flange on the gear casing. d. Using tooling (E) on the sprocket bolt, attempt to rotate the gear casing. e. Turn the ring nut (67) clockwise and counterclockwise until the rotating torque for the bearings measured with tooling (E) is 35 ¹ 5 N¡m (25 ¹ 3 lb ft) Note: The pin location may not remain the same after rotating the ring nut to achieve the correct bearing preload in step 6. To apply the pin to the ring nut, drill a new hole opposite from the original pin position.

7. With the bearing preload set, drill the body casing (74) and the ring gear (67) and install the pin (66) . Use the following procedure to drill the new pin hole.

Illustration 7

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a. Cover the threaded hole. Drill a 6 mm (0.25 inch) hole between body casing ( 74) and ring nut (67) . Clean the assembly of debris in order to eliminate contamination. b. Install pin (66) .

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Illustration 8

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8. Apply tooling (A) to the bolt threads and install washer (65) and bolt (64) Torque bolt (64) to 35 ± 2 N·m (26 ± 1 lb ft).

Illustration 9

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9. Position the body casing as shown and install piston assembly (44) and spring (45) . Install steel balls (43) .

Illustration 10

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10. Position body casing as shown. Install swash plate (42) .

Illustration 11

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11. Install plate (39) , spring (40) , and plate (38) into the cylinder barrel (33) .

Illustration 12

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12. Using a suitable press, apply pressure to plate (38) in order to compress the spring (40) .

With spring (40) compressed, install the snap ring (41) into the cylinder barrel.

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Illustration 13

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13. Position cylinder barrel as shown and install pins (37) into cylinder barrel (33) .

Illustration 14

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14. Install retainer ball (36) onto cylinder barrel (33) .

Illustration 15

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15. Install the nine pistons (35) onto retainer (34) . Install piston assembly (35) and retainer (34) in the original location onto cylinder barrel (33) .

Illustration 16

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16. Position the final drive assembly as shown and install barrel assembly (33) .

Illustration 17

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17. Position the final drive assembly with the shaft facing upwards and install steel plates (32) and friction plates (31) in the sequence of Friction, Steel, Friction and Steel.

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Illustration 18

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18. Install backup rings (30) and (27) . Install O-ring seals (30) and (29) onto brake piston (26) .

Illustration 19

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Note: Use caution when using forced air, propelled parts can cause injury.

19. Use clean hydraulic oil to lubricate the seals and backup rings on the brake piston (26) .

Using a plastic hammer, install brake piston (26) into body casing (74) . Once installed, use shop air to check operation.

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Illustration 20

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20. Install O-ring seals (25) , (24) , and (23) .

Illustration 21

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21. Install bearing (22) into motor housing .

Illustration 22

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Note: Use Tooling (F) to secure valve plate to motor housing 22. Install valve plate (21) onto the motor housing .

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Illustration 23

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23. Install O-ring seal (20) onto plug (17) . Install spring (18) and poppet (19) below plug (17) .

Repeat step on opposite side of motor cover.

Illustration 24

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24. Install plugs (17) into motor cover. Torque plugs (17) to 66 ± 7 N·m (49 ± 5 lb ft)

Illustration 25

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25. Install steel balls (16) into motor cover. Install O-ring seals (15) .

Illustration 26

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26. Install plugs (14) . Torque plugs (14) to 20 ± 2 N·m (177 ± 18 lb in). Install plugs (13) .

Torque plugs (13) to 49 ± 5 N·m (36 ± 7 lb ft).

Illustration 27

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27. install spring (11) and spool (12) under plug (10) .

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Illustration 28

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28. Install plug (10) Torque plug (10) to 79 ± 8 N·m (58 ± 6 lb ft).

Illustration 29

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29. Install spool (7) , pusher (8) , and spring (9) into motor cover.

Illustration 30

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30. Install cover (6) Torque cover to 176 ± 18 N·m (130 ± 13 lb ft).

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Illustration 31

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31. Install O-ring seal (5) and backup ring (4) .

Illustration 32

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32. Position body casing as shown and install motor cover (1) . Install bolts (2) . Torque bolts (2) to 129 ± 13 N·m (95 ± 10 lb ft). Install relief valves (3) . Torque relief valves (3) to 142 ± 14N·m (105 ± 10 lb ft).

33. Use the following procedure to check for correct parking brake torque a. Position final drive assembly as shown and secure to holding fixture.

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Illustration 33

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b. Insert tooling (D) into splines of shaft (71) . Using tooling (E) , attempt to apply 104 N·m (77 lb ft) to tooling (D) . If 104 N·m (77 lb ft) is achieved, the parking brake torque is adequate. If 104 N·m (77 lb ft) cannot be achieved, check the final drive motor components for damage.

Illustration 34

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34. Install plates (63) , bushings (62) , bearings (61) , and planetary gears (60) .

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Illustration 35

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35. Install sun gear (57) . Install thrust plate (59) . Apply tooling (A) to threads and install bolts (58) . Torque bolts (58) to 35 ± 2 N·m (26 ± 1 lb ft).

Illustration 36

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36. Install the three inner wheels (56) onto the carrier.

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Illustration 37

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37. Install carrier (55) .

Illustration 38

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38. Install bearings (54) , planetary gears (53) , and sun gear (52) .

Illustration 39

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39. Install thrust plate (51) . Apply tooling (A) to threads and install bolts (50) . Torque bolts to 35 ± 2 N·m (26 ± 1 lb ft)

Illustration 40

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40. Apply tooling (B) to the mounting flange of the gear casing (49) and Install cover (48) onto gear casing (49) . Install washers (47) and bolts (46) . Torque bolts to 14 ± 1 N·m (121 ± 9 lb in) End By: Install final drive and travel motor Copyright 1993 - 2020 Caterpillar Inc.

Fri Jan 24 00:38:30 UTC+0800 2020

All Rights Reserved.

Private Network For SIS Licensees.

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 307C MINI HYD EXCAVATOR BNE Configuration: 307C & 307C SB Excavators BNE00001-UP (MACHINE) POWERED BY 4M40 Engine

Disassembly and Assembly 307C Excavator Machine Systems Media Number -RENR4029-02

Publication Date -01/03/2005

Date Updated -29/03/2005

i01710078

Final Drive and Travel Motor - Install SMCS - 4050-012; 4351-012

Installation Procedure Table 1 Required Tools Tool

Part Number

A

5P-6215

Part Description Jack Stand

Qty 2

NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.

Dispose of all fluids according to local regulations and mandates.

1. Thoroughly clean all mating surfaces prior to installation.

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Illustration 1

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Note: Adjust the height of Tooling (A) so that there is enough clearance between the sprocket and track links for installation of the final drive and travel motor.

2. Raise the side of the machine and install Tooling (A) under the frame.

Illustration 2

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3. Attach a suitable lifting device to final drive and travel motor assembly (6). Install the final drive and the travel motor into the undercarriage frame. The weight of the final drive and travel motor is approximately 118 kg (260 lb).

4. Apply 9S-3263 Thread Lock Compound on the threads of twelve bolts (5). Install bolts (5).

Tighten the bolts to a torque of 270 ± 40 N·m (200 ± 30 lb ft).

5. Replace the O-ring seals in the ends of hose assemblies (4) with new O-ring seals.

6. Connect hose assemblies (4).

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