ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0064 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
COLD WEATHER SYSTEM
c.
Remove the three screws that secure the screen to the inlet duct adapter and remove the
screen.
d.
Remove the two screws that secure the transformer to its mounting bracket inside the
inlet end of the heater shell and gently pull the transformer out as far as the wires will
reach. (If the wires are bound with a plastic tie-wrap, it may be necessary to clip the tie-
wrap.) (See Figure 15)
e.
Tag and disconnect the red and white transformer wires.
f.
From the transformer end of the spark plug wire, pull the spark plug wire through the
bushing in the bottom of the lower housing until there is enough wire at the inlet end of
the heater to work with.
g.
Cut the spark plug wire close to where it enters the old transformer.
h.
Remove the transformer.
MOUNTING BRACKET
CUT SPARK PLUG WIRE
WHITE WIRE
RED WIRE
TRANSFORMER
WHITE WIRE
SCREW
RED WIRE
Figure 15. Transformer Replacement.
6. Install the new diesel heater transformer as follows.
a. Cut the spark plug wire on the new transformer several inches from the transformer.
b. Strip about one-half inch of insulation off the end of the spark plug wire on the new
transformer and from the end of the spark plug wire remaining in the heater.
c. Connect the two wires together using a suitable wire nut and tape with electrical tape.
d. Carefully pull enough spark plug wire up through the inside of the heater housing to
connect the wire to the spark plug and connect the spark plug wire to the spark plug.
e. Connect the new transformer red and white wires to the tagged red and white wires.
f. Make sure the new transformer mounting tabs are free of paint to ensure a good ground
connection when the transformer is installed.
g. Secure the new transformer to its bracket using the two screws.
h. Secure the screen to the inlet duct adapter with the three screws.
0064 00-22
