422F2, 427F2, 428F2, 432F2, 434F2 and 444F2 Backhoe Loaders Machine Systems Caterpillar

Removal Procedure

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When you are using hydraulic cylinders and puller studs, always ensure that the rated capacity of the puller stud meets or exceeds the rated capacity of the hydraulic cylinder. If the puller stud does not meet or exceed the rated capacity of the hydraulic cylinder, a sudden failure of the puller stud could occur. The sudden failure of the puller stud could result in personal injury or death.

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Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed. Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death. Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.

1. Lower the bucket to the ground.

2. Release the system pressure.
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   Illustration 1	g02848499

   Note: Typical example.

3. Remove pin (1) and yoke assembly (2).
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   Illustration 2	g02848503

   Note: Typical example.

4. Remove bolts (3) and tube assembly (4).
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   Illustration 3	g01247304

   Note: Typical example.

5. Remove cable straps (10). Remove bolts (6) and place bracket assembly (5) to the side. Remove clamps (9). Disconnect hose assemblies (7) and (8).
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   Illustration 4	g01247471

   Note: Typical example.

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   Illustration 5	g02855217

   Note: Typical example.

6. Attach a suitable lifting device to tilt cylinder (11). The bucket linkage will be removed with tilt cylinder (11) as a unit. The weight of tilt cylinder (11) and the bucket linkage is approximately 158 kg (350 lb).

   Note: Note the number and the location of the shims for assembly purposes.

7. Remove retaining rings (12). Remove pin (13), the washers, and any shims that may be present.

8. Remove pin assemblies (15) and (17) and washers (16) and (14).

9. Remove tilt cylinder (11) and the bucket linkage as a unit.
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   Illustration 6	g01247476
   Typical Example.

10. Remove bolts (20) and plate (21).

11. Remove bucket links (22) and (23). Repeat for the other side. Remove tube assemblies (18) and (19).

    Note: Typical example.

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    Illustration 7	g03827906

    Note: Typical example.

12. Use Tooling (A) to remove bearings (24) from bucket links (23).

Installation Procedure

1. Install tilt cylinder (11) in the reverse order of removal.

   1. Lower the temperature of bearings (24) for installation purposes.

Disassembly and Assembly Information

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When you are using hydraulic cylinders and puller studs, always ensure that the rated capacity of the puller stud meets or exceeds the rated capacity of the hydraulic cylinder. If the puller stud does not meet or exceed the rated capacity of the hydraulic cylinder, a sudden failure of the puller stud could occur. The sudden failure of the puller stud could result in personal injury or death.

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Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed. Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death. Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.

Illustration 8	g03827550

(1) Use Tooling (D) in order to tighten piston (1). Torque for piston ... 450 ± 25 N·m (332 ± 18 lb ft)

(2) Before assembly, lubricate the threads of the head and the wiper seals with clean grease. Torque for the head is approximately ... 600 ± 130 N·m (442 ± 95 lb ft)

(3) Use Tooling (B) for the removal and the installation of the bearing.

(4) Before assembly, apply Tooling (C) to the threads.