320D2 GC Excavator 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.
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   Illustration 1	g01212593

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   Illustration 2	g01214053

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

   Note: Make sure that the threaded puller hole in pin assembly (1) is clean prior to installation of Tooling (A).

3. Remove bolt (2). Fasten a suitable lifting device to Tooling (A). The weight of Tooling (A) is approximately 140 kg (310 lb). Fasten Tooling (A) to pin assembly (1).

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

4. Use Tooling (A) to remove pin assembly (1). The combined weight of Tooling (A) and pin assembly (1) is approximately 166 kg (365 lb).

5. Remove O-ring seals (3) from the flanges of the bucket.
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   Illustration 3	g01212825

6. Start the engine. Extend the bucket cylinder. Use suitable blocking to support the bucket cylinder. Shut off the engine.
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   Illustration 4	g01214065

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   Illustration 5	g01214066

7. Attach a suitable lifting device and Tooling (B) to power link (4). The weight of power link (4) is approximately 129 kg (285 lb). Raise power link (4) to a horizontal position.

   Note: Some bucket control linkages are equipped with shims between the power link and the right-hand idler link.

8. Remove the nut and bolt (5) from pin assembly (6). Install suitable cribbing to support the left-hand idler link and the right-hand idler link. Use Tooling (A) to remove pin assembly (6). The weight of pin assembly (6) is approximately 27 kg (60 lb).

9. Remove power link (4). If equipped, remove the shim between the right-hand idler link and power link (4).
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   Illustration 6	g01214083

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   Illustration 7	g01214084

10. Attach a suitable lifting device to left-hand idler link (7). The weight of left-hand idler link (7) is approximately 32 kg (70 lb). Remove the nuts and bolt (8).

11. Remove the grease fitting from pin assembly (9). Attach a suitable lifting device to Tooling (C). Use Tooling (C) to partially remove pin assembly (9) to remove left-hand idler link (7). The combined weight of pin assembly (9) and Tooling (C) is approximately 40 kg (90 lb).

12. Attach a suitable lifting device to right-hand idler link (10). The weight of right-hand idler link (10) is approximately 32 kg (70 lb). Use Tooling (A) to remove pin assembly (9) and right-hand idler link (10).

Installation Procedure

1. Apply Tooling (F) to the bearings and the seals in the stick and the power link.
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   Illustration 8	g01215263

2. Attach a suitable lifting device to right-hand idler link (10). The weight of right-hand idler link (10) is approximately 32 kg (70 lb). Position right-hand idler link (10). Use Tooling (E) to install pin assembly (9).
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   Illustration 9	g01214976

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   Illustration 10	g01344423
   (X) 0.5 mm (0.02 inch)

3. Attach a suitable lifting device to left-hand idler link (7). The weight of left-hand idler link (7) is approximately 32 kg (70 lb). Push pin assembly (9) through left-hand idler link (7).

   Install bolt (8) and the nut. Tighten the outside nut to dimension (X) beyond the end of bolt (8). Tighten the inside nut against the outside nut to a torque of 325 ± 40 N·m (240 ± 30 lb ft).

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   Illustration 11	g01213417

4. Temporarily install O-ring seals (3) onto the flanges of the bucket at the pin bore for the power link.
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   Illustration 12	g01214065

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   Illustration 13	g01215012

5. Attach Tooling (B) and a suitable lifting device to power link (4). The weight of power link (4) is approximately 129 kg (285 lb). Position power link (4) on the rod end of the bucket cylinder and between the idler links.

   Apply Tooling (F) to pin assembly (6). Use Two people and Tooling (D) to install pin assembly (6). The weight of pin assembly (6) is approximately 27 kg (60 lb).

6. Install bolt (5) and the nut. Tighten the outside nut until the outside nut is 0.5 mm (0.020 inch) beyond the end of bolt (5). Tighten the inside nut against the outside nut to a torque of 325 ± 40 N·m (240 ± 30 lb ft).
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   Illustration 14	g01213334

7. Apply Tooling (E) to pin assembly (1).

8. Install Tooling (D) on pin assembly (1). Use a suitable lifting device to position pin assembly (1). The weight of pin assembly (1) is approximately 54 kg (120 lb). Use Tooling (D) to install pin assembly (1).
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   Illustration 15	g01213478

9. Install bolt (2) on pin assembly (1).