Labrie automizer, Maintenance Manual

Page: 230 / 243

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
N
OTE
:
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