TM 11-6780-225-12
3-7. Cleaning
(3) Assembly.
(a) Insert
the
strainer
inside
the
Inspect the exterior surfaces of all the equipment in the
housing.
darkroom. The exterior surfaces should be free of dust,
(b) Position the gasket.
dirt, grease, and fungus.
(c) Screw in the pipe plug.
a. Remove dust and loose dirt with a clean, soft
cloth.
CAUTION
WARNING
Before cleaning the water supply
The fumes of trichloroethane are
system filter, close valves S1, S2,
toxic. Provide thorough ventilation
and S3.
whenever used. DO NOT use near an
f. To clean the water supply system filter (fig. 1-
open flame. Trichloroethane is not
17), proceed as follows:
flammable, but exposure of the
(1) Disassembly.
fumes to an open flame converts the
(a) Unscrew the tee bolt and remove
fumes to highly toxic, dangerous
the faceplate and gasket.
gases.
(b) Remove the filter screen from the
b. Remove grease, fungus, and ground-in dirt from
filter.
all equipment; use a cloth dampened (not wet) with
(2) Cleaning.
trichloroethane.
(a) Place the filter screen in a pail of
c. Remove dust or dirt from electrical connectors
water and brush all dirt from holes.
with a brush.
(b) Use compressed air, if available, to
CAUTION
blow all excess dirt from the holes.
Do not press on the indicator faces
(3) Assembly.
(glass) when cleaning; the indicator
(a) Install the filter screen in the filter.
many be damaged.
(b) Install the gasket and faceplate.
d. Clean the front panels, indicators, and controls;
use a soft, clean cloth. If difficulty in removing dirt
(c) Install the tee bolt and secure it.
occurs, dampen the cloth with water; mild soap may be
g. The silver recovery unit must be cleaned as
used to make the cleaning more effective.
follows each time silver is removed from the cathode:
(1) Clean the chemical deposits accumulated
on the power head coupling (fig. 2-17) and the underside
CAUTION
of the power head with a damp cloth.
Make certain that the water hose has
(2) Wipe it dry with a lint-free cloth.
been removed from water input
(3) Wash the cathode with soap and water.
connection before cleaning water
(4) Rinse the soap off with clean water and
supply system strainer.
wipe dry with a lint-free cloth.
(1) Disassembly.
3-8. Touchup Painting Instructions
(a) Unscrew and remove the pipe plug.
Remove rust and corrosion from metal surfaces bv
(b) Remove the gasket.
lightly sanding them with fine sandpaper. Brush two thin
(c) Lift the strainer out of the housing.
coats of paint of the bare metal to prevent it from further
(2) Cleaning.
corrosion.
Refer to the applicable cleaning and
(a) Place the strainer in a pail of water
refinishing practices specified in SB 11-573 and TB 43-
and brush all dirt from the screen.
0118.
(b) Use compressed air, if available, to
blow all excess dirt from the strainer.
Section III. OPERATOR'S TROUBLESHOOTING AND PREPARATION FOR TRAVEL
services chart (paras 3-5 and 3-6) until an abnormal
3-9. General Troubleshooting Information
condition or result is observed. Perform the checks and
Troubleshooting the darkroom is based on the
corrective measures indicated in the troubleshooting
operational checks in the daily and weekly preventive
chart (para 3-10). If the corrective measures indicated
maintenance checks and services chart.
To
do not result in correction of the trouble, a higher
troubleshoot the equipment, perform all the functions in
category of maintenance is required.
the daily, weekly preventive maintenance checks and
Change 6
3-3
