ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
COLD WEATHER SYSTEM
GROUND JUMPER
SPARK PLUG
BEND HERE TO ADJUST GAP
SPARK PLUG WIRE
Figure 14. Diesel Heater Spark Plug / Transformer Test Set-Up.
3. Replace the diesel heater spark plug as follows:
a. Switch the heater OFF.
b. Unplug the heater power cord first from the power source and then from the heater.
c. Remove the ground from the spark plug.
d. Unplug the spark plug from the spark plug wire and discard the spark plug.
e. Test a new diesel heater spark plug and the existing transformer by repeating the test
steps above.
f. If a spark still does not appear between the plug's electrodes, the transformer may be
defective. First, install the spark plug then replace the transformer (both procedures are
described below.)
4. Install the spark plug as follows:
a. Switch the heater OFF.
b. Unplug the heater power cord first from the power source and then from the heater.
c. Remove the ground from the spark plug.
d. Screw the spark plug into the burner head.
e. Tighten snug tight using the socket wrench. (Do not over-tighten.)
f. Reconnect the spark plug wire to the spark plug.
g. Close the access panel.
h. Close and snap the top cover.
5. Remove the old diesel heater transformer as follows:
a. Make sure the heater is switched OFF.
b. Make sure the heater power cord is unplugged first from the power source and then from
the heater.
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