| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 504-9791 | Lift Gp (60Hz)(1) | 1 |
| OR | |||
| 504-9793 | Lift Gp (50Hz)(2) | 1 | |
| B | 439-3940 | Bracket As | 1 |
| (1) | High-Voltage (480V) Low-Voltage (240V) |
| (2) | High-Voltage (400V) Low-Voltage (200V) |
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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, PERJ1017, "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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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. |
- Connect the steering frame lock. Refer to Operation and Maintenance Manual, "Steering Frame Lock".
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Illustration 1 g06287257 - Position drawbar (1) to the left side of the machine. Position the blade onto suitable cribbing. Support the circle with Tooling (A) as shown. Refer to Tool Operating Manual, NEHS1303, "Lift Group (Stand - 25 Ton)" for more information on Tooling (A).
- Stop the engine.
Release the system pressure. Refer to Operation and Maintenance Manual, "System Pressure - Release".
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Illustration 2 g01403317 - Attach Tooling (B) and a suitable lifting device to swivel (3). The weight of swivel (3) is approximately
41 kg (90 lb) . - Disconnect hose assemblies (2), (5), and (6).
- Remove bolts (7) and lower swivel (3).
- Remove the suitable lifting device.
- Remove all clamps (4) that connect hose assemblies (6) to the drawbar.
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Illustration 3 g01403392 - Remove centershift cylinder (8).
- Remove bolts (10), cap (9), and the shims. Repeat this step for the opposite side of the machine.
Note: Note the number and the location of the shims.
- Use the hydraulics to retract the blade lift cylinders.
Note: Secure the blade lift cylinders to the front frame.
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Illustration 4 g01403404 - Loosen nuts (11).
- Loosen set screws (12).
- Remove bolts (13).
- Remove shoe (14) and wear strip (15).
Note: Note the location of the shoes.
- Repeat Steps 12 through 15 for the remaining shoes.
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Illustration 5 g01403432 - Attach a suitable lifting device to drawbar (1).
- Remove bolts (16).
- Remove drawbar (1). The weight of drawbar (1) is approximately
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Illustration 6 g03485398 - Remove bolts (22).
- Remove adapter (17) and shims (18) from drawbar (1).
- Remove bolts (19) and ball (20). Remove adapter (21) from drawbar (1).
- If necessary, remove the circle drive.
