Removal Procedure
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 138-7576 | Link Bracket | 2 |
| B | 1P-0510 | Driver Gp | 1 |
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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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| NOTICE |
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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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
| NOTICE |
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Keep all parts clean from contaminants. Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components. To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly. Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination. |
- Install Tooling (A) into two holes that are located on opposite sides of upper housing (1) . Attach a suitable lifting device to Tooling (A) . Refer to Table 2 for the weight of the grapple.
Show/hide table
Table 2 Weights For Grapples Model G310B G315B G320B Sorting 900 kg (1985 lb)
1250 kg (2756 lb)
1740 kg (3840 lb)Demolition
910 kg (2007 lb)
1240 kg (2735 lb)
1750 kg (3860 lb)
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| Illustration 1 | g01013364 |
- Use suitable cribbing and ratchet straps to support the grapple with shell (4) and shell (4A) together during the removal procedure. Refer to Illustration 2.
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| Illustration 2 | g01013583 |
- Remove cover (2) from the side of lower housing (3) .
- Disconnect hose assemblies (5) . Cap the fittings in order to prevent contamination of the hydraulic system.
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| Illustration 3 | g01013585 |
Note: Before you disconnect hose assemblies (5) , mark hose assemblies (5) for installation purposes.
- Disconnect the other end of hose assemblies (5) and remove the hose assemblies from hydraulic cylinder (13) .
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| Illustration 4 | g01013599 |
Note: Before you disconnect the other end of hose assemblies (5) from hydraulic cylinder (13) , mark hose assemblies (5) for installation purposes.
- Use a suitable strap to support the rod end of hydraulic cylinder (13) . Refer to Table 3 for the correct weight of hydraulic cylinder (3) .
Show/hide table
Table 3 Weights For Hydraulic Cylinders (S/N: CZN1-Up)
94 kg (207 lb)(S/N: G7Z1-Up)
63 kg (139 lb)(S/N: G7K1-Up)
46 kg (101 lb)
- Remove bolt (8) , washer (7) , and plate (6) from the rod end of the hydraulic cylinder. Remove pin (12) and the rod end of hydraulic cylinder (13) from the mounting location on shell (4) . Lower the rod end of hydraulic cylinder (13) to the ground.
- Use a suitable strap to support the piston end of hydraulic cylinder (13) .
- Remove bolt (9) , washer (10) , and plate (11) . Remove pin (14) from the mounting location on shell (4A) and lower the piston end of hydraulic cylinder (13) to the ground.
- Inspect the sleeve bearings in the hydraulic cylinder for damage. If the sleeve bearings are damaged, remove the retaining rings and use Tooling (B) and a hydraulic press to remove the sleeve bearings from the hydraulic cylinder.
Disassembly and Assembly Information
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 127-4904 | Repair Stand | 1 |
| B | 4C-9507 | Retaining Compound | 1 |
| C | 1P-0510 | Driver Gp | 1 |
| D | 9U-7868 | Spanner Wrench | 1 |
| 127-8064 | Adjustable Plate | 1 | |
| E | 195-4609 | Seal Pick | 1 |
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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 5 | g01190029 |
(1) Torque for cylinder head ... 300 ± 40 N·m (220 ± 30 lb ft)
(2) Apply Tooling (B) to the threads.
(3) Apply Tooling (B) to the threads of the piston. Torque for the piston ... 250 ± 40 N·m (185 ± 30 lb ft)
Installation Procedure
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 138-7576 | Link Bracket | 2 |
| B | 1P-0510 | Driver Gp | 1 |
| C | 4C-5598 | High Temperature Anti-Seize | 1 |
| D | 4C-4030 | Thread Lock Compound | 1 |
Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. Dirt and other contaminants can damage the precision components. Perform assembly procedures on a clean work surface. Keep components covered and protected all times.
- If necessary, install the sleeve bearings in hydraulic cylinder (13) . Lower the temperature of the sleeve bearings and use Tooling (B) to install the sleeve bearings in the hydraulic cylinder. Install the retaining rings.
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| Illustration 6 | g01013599 |
- Use a suitable lifting device and a second person to guide the piston end of hydraulic cylinder (13) into the mounting location on shell (4A) . Refer to Table 6 for the correct weight of hydraulic cylinder (3) .
Show/hide table
Table 6 Weights For Hydraulic Cylinders (S/N: CZN1-Up)
94 kg (207 lb)(S/N: G7Z1-Up)
63 kg (139 lb)(S/N: G7K1-Up)
46 kg (101 lb)
- Align the pin bores on the piston end of the cylinder with the pin bores in shell (4A) .
- Apply Tooling (C) to pin (14) and install pin (14) .
- Apply Tooling (D) to the threads of bolt (9) . Install plate (11) , washer (10) , and bolt (9) in pin (14) .
- Use a suitable lifting device and a second person to guide the rod end of hydraulic cylinder (13) into the mounting location on shell (4) .
- Apply Tooling (C) on pin (12) and install pin (12) into the rod end of hydraulic cylinder (13) .
- Apply Tooling (D) to the threads of bolt (8) . Install plate (6) , washer (7) , and bolt (8) in pin (12) .
- Install the correct ends of hose assemblies (5) on hydraulic cylinder (13) .
Note: Be sure that you install hose assemblies (5) in the same orientation that was marked during the removal procedure.
- Install the other ends of hose assemblies (5) to the hydraulic block inside lower housing (3) .
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| Illustration 7 | g01013585 |
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| Illustration 8 | g01022393 |
- Install cover (2) on the side of lower housing (3) .
- Apply grease to the fittings that are located in the heads of pin (12) and pin (14 ) .
- Lubricate the sleeve bearing that is in the rod end of hydraulic cylinder (13) and the sleeve bearing that is in the piston end of hydraulic cylinder (13) . The fittings are located on the outer diameter of each cylinder eye.
- Remove Tooling (A) and the suitable lifting device from upper housing (1) .
Note: The hydraulic system must be purged of air before the work tool can be returned to operation. Refer to Testing and Adjusting, "Hydraulic System Air - Purge".
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| Illustration 9 | g01013364 |