Night Scan Chief
6. Exhaust the mast completely. Allow several minutes for the lubricant to settle and spread around
the wear ring and seal at the bottom of each mast section.
Keep hands clear of the descending collars while the mast is
being lowered to avoid pinching.
7. Extend the mast again one section at a time in the same sequence (smallest to largest). Wipe off
any excess lubricant which flows out of the weep holes.
NOTE: Do not lubricate the exterior of the mast, as this will cause it to attract dust and
contaminants from the air.
* TMD Mast Lubricant is specifically formulated for cold weather use, but is suitable for year around use.
Regular winter maintenance and the frequent use of TMD Mast Lubricant should significantly reduce the
potential for mast freeze ups.
Cleaning Night Scan Base and Remote Control Positioner (RCP)
Make sure lights are completely cool before attempting to
clean.
The exterior of the RCP and Night Scan base should be wiped down periodically to remove dirt and road
grime using a soft cloth or sponge and a mild solution of soapy water. The lenses of the lights should be
cleaned using standard glass cleaner and a soft towel.
4.3 ADJUSTMENTS
Adjusting the 90º Proximity Switch
The proximity switch (sensor) is intended to stop the actuator when the mast is at 90 degrees when being
raised. It senses the magnet that is threaded into the clevis and signals the base circuit board to cut
power when the actuator is in the correct position. In the event that this switch needs adjusted (i.e. after
replacing the actuator) to stop the mast at 90 degrees, the following procedure must be followed. Use
Figure 4-1 as an aid to identify the components.
1. Make certain that the Chief is level.
2. Remove the right hand base cover (opposite the look up light)
3. Loosen the upper jam nut to lower the switch approximately 1/8”.
4. Raise the mast to 90 degrees. Verify that the mast is plumb using a level or check to see that it is
square to the sheet metal side plate on the base.
5. Raise the switch until it senses the actuator. This will be indicated by 1) an audible “click” of the
exhaust valve closing, 2) lights on the hand held will change state, indicating that RCP functions are
available and 3) the LED on the base circuit board will change from green to yellow.
6. Secure the switch in position using the upper and lower jam nuts.
Revision 1
4-2
