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| Illustration 1 | g02355977 |
| SPECIFICATIONS FOR 448-1988 Angling Cylinder | |||
| Callout | Part Number | Part Name | Specification Description |
| 1 | 231-3538 | Wiper Seal | Lubricate the lips of the seals and four internal lands with hydraulic oil.
Apply Loctite 648 to the groove of the seal before assembly. |
| 2 | 167-2200 | Seal | Lubricate the lips of the seals and four internal lands with hydraulic oil. |
| 3 | 362-3819 | U-Cup Seal | Lubricate the lips of the seals and four internal lands with hydraulic oil. |
| 4 | 8T-5065 | Locknut | Torque locknut to |
| 5 | 344-5134 | Piston | Torque piston to |
| 6 | 287-1991 | Cylinder | Bore of cylinder is |
| 7 | 261-0079 | Rod | Diameter of rod is |
| 8 | 287-1991 | Cylinder | Bore of head......................... |
| 9 | 6E-4977 | Head | Lubricate with the threads with clean grease.
Torque head to |
| 10 | - | - | Stroke is Distance from pin to pin on fully retracted cylinder is |
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 9S-5565 | Pin Puller Sleeve As | 1 |
| 8T-1757 | Nut | 1 | |
| 9U-7692 | Threaded Rod | 1 | |
| H | - | Loctite 204 | - |
Start By:
- Release hydraulic pressure.
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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. |
| 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. |
- Remove bolts (1). Reposition plate assembly (2) and disconnect hose assembly (3). Remove plate assembly (2).
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Illustration 3 g01224827 - Remove clamp (5) and disconnect hose assemblies (4).
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Illustration 4 g01224828 - Attach a suitable lifting device to cylinder (8). The weight of angle cylinder (8) is approximately
68 kg (150 lb) . Remove pin (6) and use Tooling (A) to remove pin (7). Remove angle cylinder (8).
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| Illustration 2 | g01201942 |
- Install angle cylinder (8) in the reverse order of removal.
- Apply Tooling (H) to the threads of the bolts that hold pin (7).
- After angle cylinder (8) is installed.
- Check the hydraulic oil tank level. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check" for the correct procedure.
- Cycle the cylinder three times, getting as close to the end of stroke without going to full stroke.
- Cycle the cylinder another time going to full stroke slowly. Do not hold in stall.
- After cycling the cylinder, check the hydraulic oil level again.
Disassembly and Assembly Information
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| B | 1P-0808 | Multipurpose Grease | 1 |
| C | 1P-0510 | Driver Gp | 1 |
| D | 195-4609 | Seal Pick | 1 |
| E | - | Loctite 648 | - |
| F | 136-1452 | Retaining Ring Pliers As | 1 |
| G | 9U-7868 | Spanner Wrench(1) | 1 |
| 455-7436 | Spanner Wrench | 1 | |
| (1) | Refer to Tool Operating Manual, NEHS0629, "Using the 9U-7868 and 9U-7869 Spanner Wrench to Remove and install Threaded Gland Cylinder Heads". |
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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 | g01204492 |
(1) Lubricate the sealing lip with a thin covering of the lubricant that is being sealed.
(2) Apply Tooling (E) to the seal groove prior to assembling the wiper seal.
(3) Torque for nut ...
(4) Torque for piston ...
(5) Apply Tooling (B) to the threads. Torque for head ...
(6) Use Tooling (C) to remove retaining rings.