TM 5-4520-241-14
Table 4-2. Organizational Maintenance Troubleshooting - Continued
MALFUNCTION
TESTING OR INSPECTION
CORRECTIVE ACTION
8 - Continued
securing assembled carburetor to burner head. Pull off carburetor. Pull off preformed packing (6)
and clean fuel mixer (5) with a wire brush. Unscrew mixer and remove to expose fuel jet (7).
Using a piece of bare 20-gage or 22-gage wire, clean out hole in fuel jet. Do not remove jet from
carburetor.
Insert wire into end of jet. It should pass through to hole for fuel needle. Reinstall fuel mixer and
preformed packing. Reinstall carburetor on burner head. Connect fuel lines and wires and
recheck fuel suction. When suction is felt, go to step 6.
Step 6.
Turn off heater power. Reconnect solenoid power lead removed in step 5. Do not reinstall fuel
needle. Turn on heater for a few seconds. Fuel should flow from hole for fuel needle. If it does
flow, carburetor is working properly. Reinstall fuel needle, counting the number of turns to return it
to the position it was when removed in step 5. If fuel does not flow, proceed to step 7.
Step 7.
Tighten hex nut (1, fig. 4-13) on end of solenoid (where ground wire is attached). Repeat fuel flow
check in step 6. Nut must be tight to properly compress preformed packing inside. If fuel does not
flow after tightening nut, clean and inspect solenoid.
Remove hex nut (1, fig. 4-13) at end of solenoid valve. Pull off solenoid coil (2) and washer (3).
Unscrew nut (4) from carburetor body. Pull out stem (5) and nut, and pull out preformed packing
(6) from carburetor body. Pull out plunger (7). Do not lose spring (8). If preformed packing at
end of plunger is swollen or deformed, replace solenoid as an assembly. Only packing (6) is
replaceable separately. Inspect passages in solenoid side of carburetor body and remove any
foreign material. Probe passages with a thin, bare wire. If solenoid packing is good and
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