TM 5-4520-241-14
Table 4-2. Organizational Maintenance Troubleshooting - Continued
MALFUNCTION
TESTING OR INSPECTION
CORRECTIVE ACTION
4 - Continued
head. Connect fuel lines and wires and recheck fuel suction. When suction is good, go to step
17.
Step 17. Turn off heater power. Reconnect solenoid power lead removed in step 16. 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 16.
If fuel does not flow, proceed to Step 18.
Step 18. Tighten hex nut (1, fig. 4-8) on end of solenoid (where ground-wire is attached). Repeat fuel flow
check in step 17. 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. 4-8) 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 passages are clean, reinstall solenoid. Be sure to tighten nut (1) securely to compress
preformed packing inside. Repeat fuel flow check in step 17.
4-31
