TM 9-4940-558-14&P
4.2
FUEL SYSTEM
4.2.1 Drain and clean fuel tank (ref. drawing JP711O) this procedure
will waste a minimum of fuel if the fuel tank is almost empty prior
to proceeding.
4.2.1.1 Follow 3.4 - to stop unit, remove drain plug (item 1, drawing
JP711O) and permit fuel to drain completely form tank.
4.2.1.2 Clean fuel tank inlet strainer by removing cap and wiping
strainer with a rag.
4.2.1.3 Replace drain plug (item 1, drawing JP711O) fill fuel tank with
number 1 or number 2 diesel fuel.
4.2.2 Change fuel filter with unit OFF, Turn OFF fuel at filter holder
(item 10, drawing JP7209-A).
4.2.2.1 Un-screw filter cartridge and discard. Lubricate gasket on top
of new cartridge with oil and hand tighten.
4.2.2.2 Turn fuel ON at fuel filter holder (item 10, drawing JP7209-A).
4.2.3 Clean burner assembly.
4.2.3.1 With unit OFF, turn fuel filter valve to OFF position (item 10,
drawing JP7209-A). DISCONNECT: Burner protector/skid plate, from chassis,
high voltage lead from burner electrode two (2) wires to flame sensor
(FS-1), and fuel line.
4.2.3.3 Wire brush electrodes - DO NOT wire brush burner jet or allow any
dirt to enter orifice. Gap electrode to 3/23 inch.
4.2.3.8 Reversing procedure in 4.2.3.2 and making sure round" wire from
high voltage transformer is connected to one of the two (2) burner mounting
studs, tighten wing nuts to secure burner in place.
4.2.3.9 Reconnect; two (2) wires to flame sensor, fuel line, high voltage
lead and re-install the burner protector shield.
4.2.3.10 Turn fuel filter valve to ON (item 10, drawing JP7209-A).
4.3
SOLUTION SYSTEM
4.3.1 Drain solution tank and flush with water. - With unit OFF, remove
drain plug from side of tank.
4.3.1.1 After solution has drained from tank, remove tank cap and insert
water hose into tank - push to the bottom. Turn ON water and flush for
five (5) minutes.
4.3.2 Turn OFF water, remove hose and install drain plug removed in 4.3.1.
Fill solution with compound conforming to MIL-C-22542.
4.3.2.1 If cleaning compound is not used, fill solution tank with water.
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