| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 4C-9485 | Pin Driver Cap | 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. |
| 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, "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. |
- Fully extend the bucket cylinder. Fully extend the stick cylinder. Lower the boom until the stick assembly is in contact with the ground.
- Release the pressure in the hydraulic system. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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Illustration 1 g01217839 Show/hide table
Illustration 2 g01217840 - Loosen nut (1). Turn bolt (2) counterclockwise in order to release the pressure in the cylinder.
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Illustration 3 g01217850 - Remove bolts (3).
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Illustration 4 g01217906 - Remove clamps (4).
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Illustration 5 g01217908 - Remove bolts (6) and support assemblies (5).
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Illustration 6 g01217912 - Remove bolts (7) and reposition tube assembly (8) out of the way.
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Illustration 7 g01217915 - Remove bolts (9) and reposition valve assembly (10) out of the way.
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Illustration 8 g01217921 - Attach a suitable lifting device to boom cylinder (11). The weight of boom cylinder (11) is approximately
287 kg (632 lb) .Show/hide table
Illustration 9 g01217928 - Remove bolts (12) and plate (13). Remove spacer (14) (not shown).
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Illustration 10 g01218003 Show/hide table
Illustration 11 g01218010 - Attach Tooling (A) to pin (15). Use a suitable driver in order to reposition pin (15). Remove shim (16).
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Illustration 12 g01218011 - Lower boom cylinder (11) onto suitable cribbing and attach a suitable lifting device to boom cylinder (11), as shown. The weight of boom cylinder (11) is approximately
287 kg (632 lb) .Show/hide table
Illustration 13 g01218013 - Remove bolt (18). Remove pin assembly (19) and shims (17). Remove boom cylinder (11).
Disassembly and Assembly Information
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| B | 127-4904 | Hydraulic Cylinder Repair Stand Gp | 1 |
| C | 7M-7456 | Bearing Mount Compound | 1 |
| D | 1P-0808 | Multipurpose Grease | 1 |
| E | 195-4609 | Seal Pick | 1 |
| F | 3S-6224 | Electric Hydraulic Pump Gp | 1 |
| 6V-3175 | Double Acting Cylinder | 1 | |
| 9S-5564 | Pin Puller Sleeve As | 1 | |
| 9U-6832 | Nut | 1 | |
| 4C-9634 | Puller Stud | 1 | |
| 9U-5338 | Bearing Puller Adapter | 1 | |
| G | 3S-6224 | Electric Hydraulic Pump Gp | 1 |
| 6V-3175 | Double Acting Cylinder | 1 | |
| 9S-5564 | Pin Puller Sleeve As | 1 | |
| 9U-6832 | Nut | 1 | |
| 4C-9634 | Puller Stud | 1 | |
| 9U-5339 | Bearing Puller Adapter | 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 14 | g01218033 |
Note: Tooling (F) is used for the removal and installation of bearing (8). Tooling (G) is used for the removal and installation of bearing (2).
(3) Torque for the nut ...
(1) Torque for the bolts ...
Tighten the setscrew that retains nut (3) to a torque of
The slit of ring (5) must be in the direction of the piston.
Apply Tooling (D) to seals (4) prior to assembly.
Lubricate seals (6) with the lubricant that is being sealed.
Apply Tooling (C) to the wiper seal (7) prior to assembly.
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 4C-9485 | Pin Driver Cap | 1 |
- Attach a suitable lifting device to boom cylinder (11), as shown. The weight of boom cylinder (11) is approximately
287 kg (632 lb) . Position boom cylinder (11) onto the machine.Show/hide table
Illustration 16 g01218013 - Install shims (17) and pin assembly (19) on the head end of boom cylinder (11). Install bolt (18).
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Illustration 17 g01217921 - Use the suitable lifting device in order to position boom cylinder (11) onto suitable cribbing. Reposition the suitable lifting device near the rod end of boom cylinder (11). The weight of boom cylinder (11) is approximately
287 kg (632 lb) . Use the suitable lifting device to raise the rod end of boom cylinder (11) into position.Show/hide table
Illustration 18 g01218505 Show/hide table
Illustration 19 g01217928 - Install shim (16). Position pin (15) through the rod end of the boom cylinder.
- Install spacer (14) (not shown). Install plate (13) and bolts (12).
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Illustration 20 g01217915 - Position valve assembly (10) and install bolts (9).
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Illustration 21 g01217912 - Position tube assembly (8) and install bolts (7).
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Illustration 22 g01217908 - Install support assemblies (5) and bolts (6).
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Illustration 23 g01217906 - Install clamps (4).
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Illustration 24 g01217850 - Install bolts (3).
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Illustration 25 g01217839 Show/hide table
Illustration 26 g01217840 - Turn bolt (2) clockwise into the original position. Tighten nut (1).
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| Illustration 15 | g01218011 |
