Removal Procedure
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 4C-6486 | Stand | 2 |
| 8S-7615 | Pin | 2 | |
| 8S-7621 | Tube | 2 | |
Start By:
- Release the system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
 |
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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- Install Tooling (A) under boom (1) .
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| Illustration 1 | g01174000 |
- Attach a suitable lifting device to the rod end of boom cylinder (2). The weight of the end of boom cylinder (2) is approximately 41 kg (90 lb). Remove pin assembly (3) .
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| Illustration 2 | g01174003 |
- Use the suitable lifting device in order to place boom cylinder (2) onto suitable cribbing.
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| Illustration 3 | g01174009 |
- Disconnect hose assemblies (4) and (5) .
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| Illustration 4 | g01174011 |
- Attach a suitable lifting device to boom cylinder (2). The weight of boom cylinder (2) is approximately 82 kg (180 lb). Remove pin assembly (6) and remove boom cylinder (2) .
 | |
| Illustration 5 | g01174012 |
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| Illustration 6 | g01174022 |
Disassembly and Assembly
|
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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Note: The boom cylinder is equipped with a load control valve. The pressure in the cylinder must be relieved before disassembly. Refer to Disassembly and Assembly, "Load Control Valve (Boom Cylinder) - Remove and Install".
| NOTICE |
|---|
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. |
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| Illustration 7 | g01118132 |
Cylinder stroke ... 802 mm (31.6 inch)
(1) Bore of cylinder ... 115 mm (4.5 inch)
(2) Diameter of rod ... 60 mm (2.4 inch)
(3) Sleeve Bearing
- Diameter ... 61.994 ± 0.006 mm (2.4407 ± 0.0002 inch)
- Bore ... 39.994 ± 0.006 mm (1.5746 ± 0.0002 inch)
Torque of piston ... 1370 N·m (1010 lb ft)
Apply sealant to the wiper seal groove prior to assembly.
Note: Lubricate all of the seals with clean lubricant that is being sealed.
Installation Procedure
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 4C-6486 | Stand | 2 |
| 8S-7615 | Pin | 2 | |
| 8S-7621 | Tube | 2 | |
- Attach a suitable lifting device to boom cylinder (2). The weight of boom cylinder (2) is approximately 82 kg (180 lb). Install boom cylinder (2) and pin assembly (6) .
| | |
| Illustration 8 | g01174012 |
| | |
| Illustration 9 | g01174022 |
- Use the suitable lifting device in order to place boom cylinder (2) onto suitable cribbing.
| | |
| Illustration 10 | g01174009 |
- Connect hose assemblies (4) and (5) .
| | |
| Illustration 11 | g01174011 |
- Attach a suitable lifting device to the rod end of boom cylinder (2). The weight of the end of boom cylinder (2) is approximately 41 kg (90 lb). Position boom cylinder (2) and install pin assembly (3) .
| | |
| Illustration 12 | g01174003 |
- Remove Tooling (A) from boom (1) .
| | |
| Illustration 13 | g01174000 |