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
Diesel Heater Overheat Switch Testing/Replacement:
Part:
Diesel heater overheat switch (TM 10-610-309-24P)
Tool:
Test/ground lead comparable wire for jumping between two terminals
Equipment condition:
Diesel heater OFF and power cord disconnected from source and from heater
Test and, if necessary, replace the diesel heater overheat switch as follows:
WARNING
Electrical hazard. Before accessing the diesel heater overheat switch, be sure the
heater power switch is OFF and the power cord is unplugged from the power
source and the heater. Failure to observe this warning may result in injury or
death from electrical shock.
1. Test the diesel heater overheat switch as follows (see Figure 8):
a. Make sure the heater power switch is OFF and the power cord is unplugged from the
power source and the heater.
b. Remove the two screws that secure the overheat switch to its bracket on the duct outlet
adapter.
c. Unplug the two leads from the overheat switch terminals.
d. Using a test lead, jump the white wires that were disconnected from the overheat switch
terminals.
OVERHEAT SWITCH
SWITCH TERMINAL
SWITCH TERMINAL
WHITE WIRE
JUMPER
WHITE WIRE
Figure 8. Diesel Heater Overheat Switch Test Set-Up.
0064 00-12
