 |
|
Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine. |
|
|
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 attachments have been lowered, 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. |
| 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, "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. |
| Steering Relief Valve Pressure Setting | ||
|---|---|---|
| |
| Torque Specifications | |
|---|---|
| Item | Torque |
| (4) | |
The following procedure is used to measure and adjust the steering system relief valve pressure setting.
| Required Tools | ||||
|---|---|---|---|---|
| Tool | Item | Qty | Part No | Description |
| B | B1 | 1 | 8T-0860 | Pressure Gauge
(0 TO 40,000-KPA (0 TO 5,800-PSI)) |
| B2 | 1 | 6V-3989 | Fitting | |
| B3 | 2 | 6V-4143 | Quick Connect Coupler | |
| B4 | 1 | 177-7861 | Hose As
|
|
| |
| Illustration 1 | g02903276 |
| (B) Tooling | |
- Release the steering system pressure. Refer to Systems Operation Testing and Adjusting, "System Pressure - Release" for the machine being serviced.
Show/hide table
Illustration 2 g02926756 Steering frame lock installed
(1) Steering frame lock - Install steering frame lock (1). Refer to Operation and Maintenance Manual, "Steering Frame Lock" for the machine being serviced.
- Remove the protective cover from pressure tap (1). Connect Tooling (B) to pressure tap (1).
- Start the engine. Operate the engine at the high idle rpm with the transmission in neutral.
- Turn the machine against the steering frame lock. This action will cause the relief valve to open.
- Attempt to turn the machine in both directions and observe the pressure on the gauge.
- If the pressure is not the same in both directions, there is a problem in the shuttle (ball resolver) of the steering control valve. If the pressure is the same in both directions, but the pressure is not correct, adjust the spring tension of the relief valve. Refer to Table 1 for the correct pressure setting.
| |
| Illustration 3 | g06005773 |
|
Steering control valve (1) Pressure tap (2) Pressure adjusting screw | |
- Loosen locknut (4). Turn adjusting screw (3) clockwise to increase the pressure setting. Turn adjusting screw (3) counterclockwise to decrease the pressure setting.
- Tighten locknut (4). Refer to Table 2 for the tightening torque.
- When the correct pressure setting is obtained, stop the engine. Remove the pressure gauge from the pressure tap. Place the protective cover on the pressure tap.
- Remove the steering frame lock.
| |
| Illustration 4 | g06005160 |
|
Steering control valve (3) Pressure adjusting screw (4) Locknut | |