Night Scan Chief
CHAPTER 4
MAINTENANCE AND SERVICE INSTRUCTIONS
4.1 INTRODUCTION
This section of the manual describes routine maintenance procedures and covers general service
information. Refer to Chapter 5 for exploded views of the Night Scan Chief and the accompanying Tables
with item descriptions and part numbers, which may be used for ordering replacement parts.
4.2 SCHEDULED MAINTENANCE
Cleaning and Lubrication - Mast
Will-Burt pneumatic telescoping masts should be cleaned and lubricated on a regular basis to insure
smooth operation and to prolong useful life. This maintenance should be performed typically about once a
month depending upon local environmental conditions and frequency of use. Signs that cleaning and
lubrication are needed can be:
•
A noticeable gritty film on the exterior surfaces of the mast sections
•
Erratic extension or retraction of the mast
•
Noisy operation of the mast
•
Sticking of one or more mast sections when mast is extending or retracting
A pneumatic telescoping mast is a pressure vessel.
Caution must be exercised to stay clear when the mast
is being extended. Do not lean directly over the mast.
Proper eye protection should be worn when working on
the mast.
PROCEDURE:
1. One person operating hand held remote control should slowly pressurize the mast just enough to
extend the top mast section. Another person may need to hold down the larger mast section
collars to assure the proper sequence of extension. Release “Mast Up” button as soon as the
mast section is up.
2. Wipe down the extended mast section using a non-abrasive cleanser or solvent such as lacquer
thinner. Do not allow the cleaning fluid or solvent to run down inside the collar.
3. Repeat steps 2 and 3 for the next larger mast section.
4. Inject approximately 1/2 oz. of TMD Mast Lubricant* or a lightweight machine oil into the weep
hole (drain) of the exposed mast section. The weep holes are located approximately 10 inches
below the collar on each tube except the top one.
5. Repeat steps 2, 3 and 5 for each of the remaining mast sections.
Revision 1
4-1
