146 Hydraulic System
Figure 5-24
Control levers
4. Take a reading of the maximum pressure at this point.
5. With the proper hex key, tighten or loosen the work port relief valve screw so as to adjust the
chute pressure to 1200 psi.
Adjusting Pressure on 96-Gallon Grippers
The section of the proportional valve that controls the gripper is located on the right-hand side of the
valve, and it is equipped with a built-in relief valve that allows gripper pressure adjustment.
To adjust the 96-gallon gripper built-in relief valve:
1. Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 12).
2. Secure the area around the path of the arm with barrier tape or barricades.
3. Move the manual levers back and forth to release any residual pressure.
Danger!
Do not stand directly in the path of the arm while carrying out these adjustments.
Control chute
lever (also one in
the cab)
Work port relief
(chute right)
Work port relief
(chute left)
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