G315B and G320B Waste Handling Grapple Caterpillar

Removal Procedure

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

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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.

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Illustration 1	g06209347

1. Position Grapple (1) and use suitable cribbing to secure shell assemblies (2) and (3) together as shown in Illustration 1.
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   Illustration 2	g06209349

2. Remove bolts (4) and cover (5). Repeat for the other side.
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   Illustration 3	g06209350

3. Disconnect and reposition hose assemblies (6).
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   Illustration 4	g06209352

4. Put a protective cover to the exposed rod end of cylinder (10) and attach a suitable lifting device to support the rod end of cylinder (10).The approximate weight of cylinder (10) is 110 kg (243 lb).

5. Use a suitable cribbing to span between shell assemblies (2) and (3). The suitable cribbing will help in the removal and installation of cylinder (10).Secure the suitable cribbing to shell assemblies (2) and (3).

6. Remove bolt (7), plate (8), and pin (9).

7. Lower the rod end of cylinder (10) to the suitable cribbing.
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   Illustration 5	g06238640

8. Attach a suitable lifting device to support the base end of cylinder (10). Remove bolts (11), the washers, plate (12), and grease fitting (13).
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   Illustration 6	g06236573

9. Remove pin (14). Lower the cylinder to the suitable cribbing and remove the lifting device.
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   Illustration 7	g06209357

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   Illustration 8	g06209358

10. Put a protective cover to the exposed rod end of cylinder (10) and attach a suitable lifting device to the rod end of cylinder (10). Place cylinder (10) on the suitable cribbing.

11. Attach another suitable lifting device to cylinder (10). Remove cylinder (10).

Installation procedure

1. Install cylinder (10) in the reverse order of removal.
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   Illustration 9	g06209445

   1. Remove valve assembly (15), if the pin bores are not aligned with cylinder (10) and position the rod end of cylinder (10) to align the pin bores. Install valve assembly (15). Tighten valve assembly (15) to a torque of 65 ± 5 N·m (48 ± 4 lb ft).

   2. Coat all the bores for pin assemblies (14) and (9) with Tooling (B).

   3. Apply Tooling (A) to the threads of bolts (11) and (7).

   4. Refer to Testing and Adjusting, "Hydraulic System Air - Purge" to purge the air from the hydraulic system.

Disassembly Procedure

Start By:

1. Remove the hydraulic cylinder.

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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.

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Illustration 10	g06209798

1. Remove valve assembly (1).
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   Illustration 11	g06209836

2. Remove O-ring seals (2) and backup rings (3) from valve assembly (1).
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   Illustration 12	g06209838

   Note: The ring that has been deformed into the notch of the cylinder head has to be removed.

3. Use Tooling (C) to remove head (4). Remove rod assembly (7) with head (4) and piston (5) from cylinder (6).
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   Illustration 13	g06209842

4. Remove wear rings (8) and seal (9).
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   Illustration 14	g06209843

5. Remove setscrew (10) and piston (5).
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   Illustration 15	g06209844

6. Remove O-ring seal (11) from piston (5).
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   Illustration 16	g06209845

7. Remove head (4).
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   Illustration 17	g06209846

8. Remove O-ring seal (13) and ring (12).

9. Remove wear ring (14).
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   Illustration 18	g06256131

10. Remove wiper seal (17). Remove wear rings (15) and (16).

11. Remove seal assemblies (18).
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    Illustration 19	g06209848

12. Remove adapter (20) and lip seals (19) from the base end.

13. Use Tooling (D) to remove bearing (21).
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    Illustration 20	g06209849

14. Remove adapter (24) and lip seals (22) from the rod end.

15. Use Tooling (D) to remove bearing (23).

Assembly Procedure

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Illustration 21	g06209849

1. Use Tooling (D) to install bearing (23) and lip seals (22) to the rod end.

2. Install adapter (24).
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   Illustration 22	g06209848

3. Use Tooling (D) to install bearing (21) and lip seals (19) to the base end.

4. Install adapter (20).
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   Illustration 23	g06256131

   Note: Lubricate wear rings and seals with the lubricant that is being sealed.

5. Install seal assemblies (18).

6. Install wear rings (15) and (16). Install wiper seal (17).
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   Illustration 24	g06209846

7. Install ring (12) and O-ring seal (13).

8. Install wear ring (14).
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   Illustration 25	g06209845

9. Install head (4).
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   Illustration 26	g06209844

10. Install O-ring seal (11) to piston (5).
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    Illustration 27	g06209843

11. Apply Tooling (E) to the threads of piston (5). Install piston (5). Tighten piston (5) to a torque of 315 ± 15 N·m (232 ± 11 lb ft).

    Note: Do not loosen the piston to align. The locking setscrew must be located to new hole.

12. Drill a 7 mm (0.3 inch) diameter hole, 38 ± 1 mm (1.5 ± 0.1 inch). Tap the hole using M8 x 1.25-6H tap to a depth of 35 ± 1 mm (1.4 ± 0.1 inch).

13. Apply Tooling (E) to the threads of setscrew (10). Install setscrew (10).
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    Illustration 28	g06209842

14. Install seal (9) and wear rings (8).
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    Illustration 29	g06209838

    Note: The ring must be deformed into the notch of the cylinder head.

15. Install rod assembly (7) with head (4) and piston (5) into cylinder (6).

16. Use Tooling (C) to install head (4) to cylinder (6). Tighten head (4) to a torque of 315 ± 15 N·m (232 ± 11 lb ft).
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    Illustration 30	g06209836

17. Install backup rings (3) and O-ring seals (2) on valve assembly (1).
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    Illustration 31	g06209798

18. Install valve assembly (1). Tighten valve assembly (1) to a torque of 65 ± 5 N·m (48 ± 4 lb ft).

End By:

1. Install the hydraulic cylinder.