220 Lifting Arms
3. Using the joystick or the lever on the proportional valve, fully extend the rail cylinders of the arm.
4. As soon as a constant and uniform oil flow (without air bubbles) is leaking out, tighten the fitting.
Keep the hydraulic function engaged until the fitting is tightened.
5. Loosen (do not disconnect) fitting number 4.
6. Fully retract the rail cylinders of the arm.
7. Repeat step number 4.
To bleed the Up/Down circuit:
1. Repeat steps 1 through 3 of the gripper circuit bleeding procedure on page 219.
2. Loosen (do not disconnect) fitting number 5 (see Figure 10-13).
3. Using the joystick or the lever on the proportional valve, fully extend the lifting cylinder of the
arm.
4. As soon as a constant and uniform oil flow (without air bubbles) is leaking out, tighten the fitting.
Keep the hydraulic function engaged until the fitting is tightened.
5. Loosen (do not disconnect) fitting number 6.
6. Fully retract the lifting cylinder of the arm.
7. Repeat step number 4.
Lifting Arm Holding Valves
The Right Hand™ lifting arm is equipped with cylinder-mounted holding valves. See the table below
for the various characteristics of the lifting arm holding valves for each arm type.
Adjusting Gripper Holding Valve Pressure
NOTE: The lifting arm gripper is equipped with holding valves. 2 cartridges are located just behind the
gripper (see Figure 10-15) [for the standard Right Hand™]. For the HD Right Hand™,
cartridges are mounted directly on the cylinders (see Figure 10-16).
Arm Type Movement
Type of Movement
Prevented
Cushioning Effect
Std & HD In/Out Cylinder Opening
(boom Extension)
In - Adjustable
Out - non adjustable
HD only Up Down Cylinder Closing
(gripper body
lowering)
Up/Down - Adjustable
Std & HD Gripper Cylinder Opening
(gripper closure)
None
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