336E Excavator and 336E MHPU Mobile Hydraulic Power Unit Machine Systems Bucket Linkage - Remove and Install 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.

1. Start the engine. Park the machine on a hard, level surface. Fully extend the stick. Position the bucket level on the ground. Shut off the engine.

2. Release hydraulic system pressure.

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Illustration 1	g02144874

3. Slide O-ring seals (3) off the pin joints between the bucket and the power link and onto the flanges of the bucket.

4. Remove bolt (2). Attach Tooling (A) to pin assembly (1). Attach a suitable lifting device and Tooling (B) to Tooling (A). The weight of Tooling (A) is approximately 137 kg (300 lb).

Note: Reposition the suitable lifting device during the removal of pin assembly (1) .

5. Use Tooling (A) in order to remove pin assembly (1). The combined weight of Tooling (A) and pin assembly (1) is approximately 170 kg (375 lb).

6. Remove O-ring seals (3) from the flanges of the bucket.

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Illustration 2	g02144875

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Illustration 3	g02144876

7. Start the engine. Extend the bucket cylinder. Use a suitable blocking in order to support the bucket cylinder. Use a suitable blocking in order to support the link assemblies. Shut off the engine.

8. Attach a suitable lifting device and Tooling (B) to power link (6). The weight of power link (6) is approximately 159 kg (350 lb). Raise power link (6) to a horizontal position.

9. Remove nuts (5) and bolt (4) from pin (7) .

10. Attach Tooling (C) to pin (7). Attach a suitable lifting device and Tooling (B) to Tooling (C). The weight of Tooling (C) is approximately 66 kg (145 lb).

11. Use Tooling (C) in order to remove pin (7). The combined weight of Tooling (C) and pin (7) is approximately 100 kg (220 lb). Remove pin (7), the shims, and power link (6) .

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Illustration 4	g02144877

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Illustration 5	g02144878

12. Attach a suitable lifting device to link assembly (8). The weight of link assembly (8) is approximately 39 kg (85 lb). Remove nuts (9) and bolt (10) .

13. Remove the grease fitting from pin assembly (11). Attach Tooling (D) to pin assembly (11). Attach a suitable lifting device and Tooling (B) to Tooling (D). The weight of Tooling (D) is approximately 34 kg (75 lb).

14. Use Tooling (D) to partially remove pin assembly (11) in order to remove link assembly (8).

15. The combined weight of pin assembly (11) and Tooling (D) is approximately 50 kg (110 lb).

16. Attach a suitable lifting device to link (12). The weight of link (12) is approximately 32 kg (70 lb).

17. Use Tooling (D) to remove pin assembly (11) and link (12) .

Installation Procedure

1. Install the bucket linkage in the reverse order of removal.
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   Illustration 6	g02145227

   1. Use Tooling (E) in order to install pin assembly (11) .
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   Illustration 7	g02145291

   2. Install the outer nut (9) to Dimension (X). Dimension (X) is 0.5 ± 0.5 mm (0.02 ± 0.02 inch).
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   Illustration 8	g02145295

   3. Use Tooling (F) in order to install pin (7). Attach a suitable lifting device to pin assembly (7). The weight of pin assembly (7) is approximately 34 kg (75 lb).
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   Illustration 9	g02145380

   4. Install the outer nut (5) to Dimension (X). Dimension (X) is 0.5 ± 0.5 mm (0.02 ± 0.02 inch).
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   Illustration 10	g02145384

   5. Use Tooling (G) in order to install pin assembly (1). Attach a suitable lifting device to pin assembly (1). The weight of pin assembly (1) is approximately 34 kg (75 lb).