Lifting Arms 385
Figure 10-9
Movement restrictors
NOTE: The arm movements (extension/retraction, up/down) have been preset in factory to the
maximum speed. The gripper movements (opening/closing) have also been set in factory to
their optimal value in order to allow for smoother grabbing of carts.
Speed Adjustment Procedure:
1. Secure the arm working area using barrier tape or barricades.
2. Put the transmission in neutral.
3. Start the engine and engage the hydraulic system.
4. Clearly identify the restrictor screw on the valve that corresponds to the proper function (boom
extension/retraction, gripper opening/closing, etc.) [see Figure 10-9]. Move the lever to
evaluate the speed of the arm/gripper, then let go of it.
5. Loosen the locknut.
6. Turn the restrictor adjustment screw only one-eighth (1/8) of a turn at a time to see if the arm/
gripper speed has changed significantly.
7. Move the lever again to evaluate the arm/gripper speed.
8. Repeat until cycle times are properly set.
9. Once the adjustment is completed, tighten the locknut.
Caution!
When adjusting the arm up/down speed, make sure the auto-closing feature allows the
gripper to close sufficiently to avoid the gripper hitting the hopper walls.
Gripper open
speed restrictor
Gripper close
speed restrictor
Arm down speed
restrictor
Arm retract speed
restrictor
Arm extend speed
restrictor
Arm up speed
restrictor
To Next Page
Loading...
Need help?
General
