Toyota Orderpicker Model 7BPUE15 Service Manual
Section 7. Component Procedures
Hydraulic Components
Lift Pressure Relief Valve Adjustment
Lift Pressure Relief Valve Adjustment
required to lift maximum rated load (value recorded earlier). b. TO increase pressure, turn adjusting screw clockwise. To decrease pressure, turn adjusting screw counterclockwise. c. Tighten locknut on lift pressure relief valve. 9. Check pressure again. If value has changed, repeat this procedure until the correct pressure reading is obtained. 10. Turn key switch OFF. 1 1. Disconnect pressure gauge and reinstall cap on lift pressure test port (Gl).
Figure 7-94.
Adjusting Lift Pressure
1. Install a calibrated pressure gauge [3000 psi (20,682 kPa) a t mid-range] in the lift pressure test port (Gl).See Figure 7-94. 2. Loosen the locknut on the lift pressure relief valve (RV1) to back out the high-pressure relief. 3. Make sure emergency lower valve is closed.
4. Place a maximum rated load + 200 lb. (90.7 kg.) on the forks.
5. Start the lift system and turn the pressure relief screw clockwise until the platform starts to lift. Note the pressure required when the platform starts to elevate. On three-stage trucks, continue lifting until the third stage of the mast starts lifting. Record the pressure reading. 6. Lower the operator platform and remove the load. 7. Chain the mast sections together and lift or lift the operator platform until the upper limit is reached.
8. To adjust pressure: a. Continue trying to elevate, and turn lift pressure adjusting screw (at RV1) to obtain a pressure reading of 100 to 300 psi (689 to 2068 kPa) greater than that
00700-CL222-05, 1 5 March 2005
