TM 5-4520-241-14
e. Reassembly. Reassemble the carburetor in the reverse order of disassembly. Note the following:
(1) When installing the fuel needle (25, fig. 4-23), lubricate preformed packing (26) with fluorosilicone conforming
to MIL-G-27617.
(2) Float bowl (15) must be aligned with the carburetor body as shown in the exploded view to facilitate
connection of the fuel lines.
f. Installation. Installation of the carburetor is the reverse of removal.
4-33.
SOLENOID VALVE.
a. Testing. The solenoid valve, which screws into the carburetor body, is not repairable. Test it by connecting the
two leads to a 24-VDC power source. When the solenoid valve is energized and deenergized, the mechanical sound of
the valve opening or closing should be heard as a "click". If there is no evidence of the valve operating, replace it.
b. Replacement.
(1) Open the front access door. Remove nut (1, fig. 4-24) and pull off solenoid coil (2) and washer (3).
(2) Use an adjustable, open-end wrench to unscrew and remove nut (4). Do not lost spring (8). Only the
preformed packing (6) is replaceable separately. If any other part of the solenoid valve is defective, replace the solenoid
valve as an assembly.
(3) To install a new solenoid valve, be sure spring (8) is installed in the plunger. Screw the nut into the carburetor
body, and tighten with an adjustable wrench.
(4) Install washer (3) and solenoid coil (2) over the stem (5). Fit the black coil lead over the threaded end of the
stem, and connect the yellow lead to the electrical connector. Retain the coil by installing nut (1).
NOTE
Be sure to tighten nut (1) securely. It regulates the travel of plunger (7).
(5) Close the access door and check the heater for proper operation.
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