General Maintenance 215
3 c. Retighten the nut.
4. Slightly close the gripper or extend the arm out (about 1 inch). The ARM OUT warning lights
should start flashing.
5. Repeat the procedure until the limit switch is properly adjusted.
Adjusting Arm Parked Limit Switch
Centrally located inside the Helping-Hand
TM
arm assembly, near the top cover, the arm parked limit
switch (see Figure 3-310) sends a signal to the controller module that the automated arm is in the
parked travel position inside the hopper and turns off the A
RM EXTENDED warning light on the
dashboard (see Figure 3-313).
To adjust this limit switch apply the following procedure:
1. Take down the gripper completely by using the joystick.
2. Fully extend the arm.
3. Turn OFF the engine.
4. Proceed with the tagout/lockout procedure. Refer to “Locking Out and Tagging Out the
Vehicle” on page 14.
5. Open the black plastic spring-equipped retracting cover that is on top of the arm base (see Figure
3-311).
Use a stepladder for easy access to that section of the arm.
6. Unscrew the screws that hold the limit switch lever in place (see Figure 3-312).
7. Raise or lower the detection lever a little bit and tighten up the screws (see Figure 3-312).
Danger!
This limit switch MUST be working at all times. Otherwise, the operator may not be aware
that the arm is not fully retracted or that the gripper is open or closed. This may cause
accidents, injuries and/or property damage.
Caution!
This procedure must be done correctly before adjusting the gripper auto-closing system.
Danger!
Do not stand directly in the path of the arm while carrying out these tasks.
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