Labrie MINIMAX Maintenance Manual page 173

Danger!
Do not stand in the path of the arm while carrying out these adjustments.
To adjust arm speed:
Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 20).
1.
Secure the area around the path of the arm with barrier tape or barricades.
2.
Put the transmission in Neutral.
3.
Start the engine and engage the hydraulic system.
4.
Clearly identify the stopper screw on the valve that corresponds to the proper function (arm
5.
extension/retraction, gripper open/close).
Move the lever to evaluate arm speed, then release the lever.
6.
Make sure the Speed-Up feature is activated. Engine speed should be at 1200 rpm.
Caution!
When adjusting tilt movement speed, make sure the auto-closing feature allows the gripper
to close sufficiently to avoid gripper fingers hitting the hopper walls.
Loosen the locknut.
7.
Turn the restrictor adjustment screw only one eighth (1/8th) of a turn at a time to see a
8.
significant change in the arm speed.
Move the lever again to evaluate arm speed. Repeat until cycle times are properly set (see table
9.
below).
Tighten back the locknut.
10.
Table 1 Arm Operating Pressure and Cycle Times (engine speed at 1200 rpm)
Arm function
Arm extend/retract
Arm up
Arm down
Gripper close
Gripper open
Pressure setting (psi)
2000
2000
2000
1200
750
Lifting Arm 165
Cycle time (sec.)
10.5
6
6
2
less than 2