Labrie EXPERT Maintenance Manual page 395

6. Slowly move the lever on the gripper section of the arm valve (see Figure 10-5) and read the
pressure on the pressure gauge at the time the gripper starts closing.
The closing movement must begin when the pressure reaches 550 PSI.
7.
If the pressure is below or over that value when the gripper starts closing, adjust the holding valve
pressure accordingly using the adjustable cartridge (see Figure 10-10).
N : Turn the screw counter-clockwise to increase pressure or clockwise to reduce pressure.
OTE
Adjusting Arm In/Out Holding Valve Pressure
: The following procedure applies only to E
N
OTE
arms.
On a 2-H -H
ELPING
automated arm. These valves (see Figure 10-12) are used to prevent one arm from extending
suddenly while the other is being used. An adjustable cartridge is assembled on each holding valve
and can be used to adjust the valve pressure.
N : The following procedure can be used to adjust the pressure of both holding valves.
OTE
Figure 10-12 Arm in/out holding valve
Adjustable
cartridge
To adjust the arm in/out holding valve pressure:
1.
Apply all safety measures to ensure safety around the vehicle at all times.
2.
Make sure that the parking brake is applied.
3.
Locate one of the arm in/out holding valves (see Figure 10-12).
XPERT
™ arm equipped E
AND XPERT
™ units equipped with 2 H
™ unit, there are 2 holding valves, one for each
Holding valve
Lifting Arms 387
-H ™
ELPING AND