Adjusting The Mast 90° Limit Switch - Will Burt Night Scan Powerlite Operating Instructions Manual

NIGHT SCAN POWERLITE, POWERLITE XTREME, AND POWERLITE HDT
OPERATING INSTRUCTIONS
7.5.2 Adjusting the mast 90° Limit Switch
The 90° Switch (Figure 7-2) senses when the mast is at 90° by checking the position of the
actuator. There is a magnet mounted to the actuator arm that triggers the limit switch. When the
mast is being raised from the stowed position and the 90° Switch is sensed, power to the
actuator is removed thus allowing the mast to remain at 90°. The mast will not extend and the
RCP will not function if the mast is not at 90°.
To adjust the 90° Limit Switch:
1. Make certain that the base is level.
2. Remove the left base cover to access the Limit Switches and Base Board.
3. Loosen the lock nuts to adjust the switch position in the slot.
4. Raise the mast to 90° by holding the "Mast Up" button until the mast is at 90°. Do not use the
Auto-Up feature to raise the mast to 90°.
5. Check that the mast is at 90° by using a level, ensuring that the mast is square to the sheet
metal side plate on the base. A value range of 89.5 to 90.5° is acceptable.
6. Adjust the 90° Switch until it senses the actuator. This will be indicated by the diagnostic
LEDs on the Base Board (Figure 7-1).
7. Secure the switch in position using the lock nuts.
8. Raise and lower the mast several times, checking that the mast is plumb each time, and
adjust the switch if necessary. The mast should drive into the rubber pad slightly for stability.
9. Replace the base cover.
Mast Stowed
Switch
Figure 7-2 Mast Stowed and Mast 90° Limit Switch Locations (Cover Removed)
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Mast 90° Switch
TP-4723701-U
MAY 2021