of Preventive Maintenance Forms
After cleaning, dry the drum thoroughly and
polish it with a clean, dry cloth.
a. The decision as to which items on DA Forms
d. Clean the stylus assembly with a soft bristle
11-238 and 11-239 are applicable to this equip-
brush. Do not disturb the adjustment. Use a
ment is a tactical decision to be made in the case
of first echelon maintenance by the communication
to the stylus assembly. Avoid touching the
officer/chief or his designated repreaentative, and
lamps with the bare fingers.
in the case of second and third echelon mainte-
e. Clean the drum shaft, and keyway, and the
nance, by the individual making the inspection.
guide rail with a cloth dampened in solvent (SD).
Instructions for the use of each form appear on
Wipe them dry with a clean lint-free cloth. Use
the reverse side of the form.
a small, stiff brush dipped in solvent (SD) to
clean the lead-screw threads while the motor is
tially or totally applicable to Facsimile Set
running. Wipe it dry with a clean, lint-free cloth.
Apply a small amount of oil to the lead screw.
86(*)/TXC-1. References in the ITEM block
f. Clean rust and corrosion from photographic
are to paragraphs in the text which contain
trays with fine sandpaper or emery cloth. If the
additional maintenance information.
protective coating has worn off and the trays are
corroded, replace the trays if possible. In an
43. Performing Preventive Maintenance
emergency, corroded trays may be coated with
Perform the following preventive maintenance
paraffin or wax. Warm the tray so that the
operations at the intervals indicated, unless these
paraffin or the wax will flow.
intervals are reduced by the local commander.
g. To clean the drum feed mechanism, remove
Caution: Tighten screws, bolts, and nuts
the four screws in the retaining ring (figs. 117 and
carefully. Fittings tightened beyond the pressure
118) and slide the cam plate and retaining ring
for which they are designed will be broken on
free of the feed mechanism. Do not drag the
ring over the threads of the lead screw. Remove
a. External Preventive Maintenance.
the half nut retainer plug and slide the half nut
and spring from the holder. Remove and clean
condition of the equipment and the spare
only one half nut at a time so there will be no
mistake in restoring it to the proper holder.
(2) Check the site for the location and instal-
Clean the holder, half nut, and spring with a small
lation of the equipment for normal
brush dipped in solvent (SD). Dry thoroughly
with a clean, lint-free cloth. Clean the cam plate
(3) Remove dirt, dust, moisture, and corro-
with a cloth dampened with solvent (SD), and
sion from the carrying handles, motor
dry thoroughly with a clean, lint-free cloth.
cover, equipment cover, binding posts,
Reassemble in the reverse procedure of disassem-
base, and drum.
bly; see that the half nut retaining plugs are
(4) Inspect the motor housing and equipment
flush with the outer edge of the holder. This
cover for rust, indentures, scratches, and
provides proper tension for the spring, and allows
perfect fit. Inspect the fuses for suit-
clearance for the drum cam plate.
ability and seating.
h. If available, a vacuum cleaner may be used
(5) Check the engaging lever and clamp bar
to remove dust from inaccessible places. Be
careful or mechanical damage from the air blast
(6) Inspect the START PHASE, ON-OFF,
30RPM-60RPM, and the STANDBY-
i. Check the motor current daily. It should be
MON-TALK switches for positive action
between 60 and 70 on the motor current meter.
j. For further information on preventive main-
(7) Check for normal operation.
tenance techniques, refer to TB SIG 178, Preven-
(8) Inspect, clean , and tighten the GAIN
tive Maintenance Guide for Radio Communication
and CONTRAST controls, and the cable
connections (figs. 148, 149, and 150).