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
Replace the diesel heater safety control assembly as follows:
WARNING
Electrical hazard. Before removing the diesel heater safety control assembly, 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 serious
injury from electrical shock.
1. Make sure the heater power switch is OFF.
2. Make sure the heater power cord is unplugged from the power source and from the heater.
3. Remove the diesel heater safety control assembly as follows (see Figure 11):
a. Remove the four screws and washers holding the control box assembly to its bracket.
b. Remove the four screws holding the safety control assembly to its bracket.
c. Remove the four screws and one bolt holding the bracket to the heater frame. (One
corner of the bracket remains riveted to the heater.)
d. Pull the bracket away from the heater enough to access the wires behind the bracket.
e. Tag and disconnect the four wires from the terminals on the safety control assembly.
f. Trace the four wires that come out the back of the safety control assembly to the
distribution bar and disconnect the wires from the distribution bar. Leave all other wires
connected to the distribution bar.
g. Carefully pull the wires through both holes in the bracket.
h. Discard the safety control assembly.
BRACKET
DISTRIBUTION BAR
SAFETY
CONTROL
ASSEMBLY
4 WIRES
CONTROL BOX
ASSEMBLY
Figure 11. Diesel Heater Safety Control Assembly Replacement.
0064 00-16
