Adjusting Low Pressure On 300-Gallon Gripper - Labrie AUTOMIZER FULL EJECT Maintenance Manual

Adjusting Low Pressure on 300-Gallon Gripper

To adjust the low pressure on the 300-gallon gripper external relief valve:
1. Make sure the hydraulic pump is disengaged and the engine is off.
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.
4.
Make sure that all hoses are tight and not leaking.
5.
Connect a pressure gauge (0–4000 psi) to the quick-connect coupler on the proportional valve
(see Figure 5-37).
6. Put the transmission in Neutral, start the engine, and engage the hydraulic pump.
7. If it is not already done, deactivate the 300-G
cab control panel.
The switch will turn blue.
8.
Adjust the gripper pressure:
Close the gripper using the corresponding lever on the valve and maintain the lever in
8 a.
place.
Adjust the external relief valve to 1200 ± 50 psi (see Figure 5-41).
8 b.
Figure 5-41 External relief valve adjustment screw
G switch (see Figure 5-39) on the in-
ALLON RIPPER
Hydraulic System 147