TM 9-1220-238-14
CHAPTER 3
OPERATOR/CREW AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT
board plotting, M18 are listed in Appendix B.
3-1. Repair Parts.
Repair parts and equipment issued to the using
3-2. Tools and Equipment.
organization for operating and maintaining the
Refer to Appendix B section V.
Section II. LUBRICATION AND PAINTING
threads of thumbscrews (16 and 17, fig. B-2) on anchor
3-3. General.
end of scale assembly.
Lubrication of the board plotting M18 (fig. 1-1) is
d. Apply light coat of grease on wingscrew threads
required and accomplished by coating the following
of bracket assemblies (7,8, fig. B-1) and support leg
surfaces with a thin film of aircraft and instrument
socket and brace assembly (fig. 1-1).
grease, MIL-G-23827.
a. Apply light coat of grease MIL-G-23827 on
3-4. Painting.
shafts (4 and 7, fig B-6) and at bearing surfaces of
Paint all exposed surfaces so that the equipment will
bracket assembly (26, fig B-6).
Replenish as
have the appearance of a new item. Refer to TM 9-254
determined and required by operating and field
for detailed instructions on painting. Bearing surfaces,
conditions. Keep brake lever (fig. 1-1) clean and free of
sliding surfaces, mating surfaces, screw threads, and all
grease.
other critical surfaces must not show traces of paint or
b. Apply light coat of grease, MIL-G-23827 to
primer. Painting of the parts should be done at the most
moving peripheral surfaces of bearings (8 and 11, fig. B-
practicable stage of maintenance.
links (9 fig. B-2).
c. Apply light coat of grease MIL-G-23827 to
Section III. SERVICE UPON RECEIPT OF MATERIAL
tags, serial number and any information that may be
3-5. General.
continued on paper tags which may be attached to the
a. When new, used, or reconditioned material is
carrying chest.
first received by the using organization, it is the
(2) Remove board plotting, from chest by releasing
responsibility of the officer in charge to determine
twelve wing keys used to secure cover to chest.
whether the material has been properly prepared for
service by the supplying organization to be sure it is in
CAUTION:
condition to perform the function.
b. Make a record of any missing parts, tools, and
Do not mishandle or abuse the
equipment, and of any malfunctions. Correct any
equipment because inaccuracy or
deficiencies as quickly as possible.
breakage
will
result
from
mistreatment.
3-6. Duties.
The organizational mechanic performs the
b. Inspection
inspection to determine whether the material has been
(1) Upon receipt of the board plotting M18
prepared for service and is in condition to perform its
make a visual inspection for obvious physical damage
assigned mission. It is the duty of the operator to assist
such as cracked, damaged, loose, bent or broken parts,
the organizational mechanic in the performance of these
dented surfaces, nicks, burns, scratches, or chips, loose,
services.
missing or binding knobs, corrosion, fungus growth,
moisture, and missing parts.
3-7. Services.
(2) Check that mechanical components
Upon receipt of plotting board M18 by a using
operate smoothly without binding or rough motion.
organization, the following operations will be performed.
Check that moving parts are free from lint, grit and other
a. Unpacking
foreign matter which may hamper the operation of the
(1) The board plotting, M18 is housed in
instrument.
plotting board chest.
Before opening chest, and
(3) Inspect the instrument for missing com-
removing the Instrument carefully check identification
3-1
