Start By:
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the component should be thoroughly cleaned. This will help to prevent dirt from entering the internal mechanism.
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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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates. |
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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. |
Note: Put identification marks on all hoses, on all hose assemblies, on all wires, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.
- Loosen the track. Refer to Operation and Maintenance Manual, "Track - Check/Adjust".
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Illustration 1 g00984764 - Disconnect hose assemblies (1).
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Illustration 2 g00984766 - Attach a suitable lifting device to lift cylinder (2). Remove pins (3).
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Illustration 3 g00984767 - Remove lift cylinder (2). The weight of lift cylinder (2) is approximately
68 kg (150 lb) .Show/hide table
Illustration 4 g00984768 - Remove tube assembly (4) and fitting (5).
Disassembly and Assembly Information
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 4C-4032 | Bearing Mount Compound | |
| B | 4C-6724 | Socket | 1 |
| C | 6V-3160 | Double Acting Cylinder | 1 |
| 9U-6600 | Hand Hydraulic Pump | 1 | |
| 1P-1832 | Bearing Puller Adapter | 1 | |
| 9S-5565 | Pin Puller Sleeve As | 1 | |
| 4C-9633 | Puller Stud | 1 | |
| 1P-0544 | Fast Runner Nut Assembly | 1 | |
| 5P-8250 | Washer | 1 | |
| D | 127-4904 | Hydraulic Cylinder Repair Stand | 1 |
| E | 9U-7868 | Spanner Wrench | 1 |
| 127-8064 | Adapter Plate | 1 | |
| F | 195-4609 | Seal Pick | 1 |
| G | 5P-0960 | Molybdenum Grease | 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 | g00984798 |
(1) Use Tooling (B) to install bolt (1). Torque for bolt with lubrication on threads ...
(2) Apply clean grease to the threads. Torque for the crown ...
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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. |
Note: Threaded rods cannot be used with hydraulic cylinders as tooling.
(3) Apply Tooling (A) to the wiper seal groove prior to assembly.
Use the lubricant that is being sealed in order to lubricate the sealing lips in the head.
| Required Tools | |||
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| Tool | Part Number | Part Description | Qty |
| G | 5P-0960 | Molybdenum Grease | 1 |
Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.
- Install fitting (5) and tube assembly (4).
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Illustration 7 g00984767 - Attach a suitable lifting device to lift cylinder (2). Install lift cylinder (2). The weight of lift cylinder (2) is approximately
68 kg (150 lb) .Show/hide table
Illustration 8 g00984766 - Apply Tooling (G) to pin (3). Install pins (3) into lift cylinder (2).
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Illustration 9 g00984764 - Connect hose assemblies (1).
- Tighten the track. Refer to Operation and Maintenance, "Track - Check/Adjust".
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| Illustration 6 | g00984768 |