- Quarry Truck:
- 775B (S/N: 7XJ1-UP)
The setting for the 9J-0622 Relief Valve, which is part of the 9T-5714 Control Valve Gp, can be increased from 17225 ± 175 kPa (2500 ± 25 psi) to 18950 ± 175 kPa (2750 ± 25 psi).
This setting can be increased in order to increase the hoist pressure on 775B Quarry Truck. A new spring in the 9J-0622 Relief Valve makes the increased pressure possible.
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| Illustration 1 | g01222987 |
9J-0622 Relief Valve (1) 3H-2549 Shims (2) 2J-2866 Shims (3) 3G-7402 Spring | |
In order to increase the pressure relief setting, replace the 2J-6089 Spring with a 3G-7402 Spring (3). During the installation of spring (3), install three 3H-2549 Shims (1) and four 2J-2866 Shims (2) .
In order to reach a pressure relief setting of 18950 ± 175 kPa (2750 ± 25 psi), add shims or remove shims.
Note: Removing one 2J-2866 Shims will increase the relief pressure by approximately 310 kPa (45 psi). Adding one 3H-2549 Shim will increase the relief pressure by approximately 655 kPa (95 psi).