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
Diesel Heater Fuel Filter Replacement:
Part:
Diesel heater fuel filter (TM 10-610-309-24P)
Material:
Small amount of motor oil (WP 0079, Table 1, item 19)
Equipment condition:
Diesel heater OFF and power cord disconnected from source and from heater
Clean or replace the diesel heater fuel filter as follows:
WARNING
Mechanical and electrical hazard. Before opening up the top cover of the heater to
access the burner head 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 injury or death 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. Open the top cover of the heater by unsnapping the three "screws" at the front of the cover and
lifting the cover.
4. Open the access panel at the top of the heater.
5. Loosen the setscrew that secures the fan to the motor shaft and slide the fan off the motor shaft.
(Removing the fan makes it easier to access the fuel lines and fuel filter and reduces the chance
of damaging the fan.) (See Figure 3.)
NOTE
It may be difficult to disconnect the fuel line from the fuel filter. So two methods
for removing the fuel filter are described here. If you follow Method One to remove
the filter, follow Method One for installing the new fuel filter. If you follow Method
Two to remove the fuel filter, follow Method Two for installing the new fuel filter.
6. Fuel filter removal Method One (see Figure 4):
a. Gently pull both male ends of the fuel filter out of the fuel line.
b. Discard the fuel filter.
7. Fuel filter removal Method Two:
a. Disconnect the fuel line from the burner head assembly.
NOTE
When pulling the fuel line out of the fuel tank, be careful not to pull the rubber
bushing out of the fuel tank. If the bushing comes out, it may be necessary to
disassemble a significant portion of the heater frame in order to access the fuel
tank to reinstall the bushing.
b. Gently pull the fuel filter so that the bottom fuel line comes completely out of the fuel tank.
c. Lift the fuel line and fuel filter assembly out of the heater.
d. Pull the fuel lines off both ends of the old fuel filter. Discard the filter.
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