TM 9-4520-272-14&P
FIELD (UNIT) MAINTENANCE
LARGE CAPACITY FIELD HEATER
NSN 4520-01-500-1534
2-WAY FUEL SOLENOID VALVE
REPLACE
INITIAL SETUP:
Tools
Personnel Required
Tool Kit, General Mechanics (Item 2, WP 0092
MOS 63J or 52C
Materials/Parts
Equipment Condition
Sealant, thread (Item 2, WP 0119 00)
Heater shut down and cool (WP 0005 00)
Mat, Petroleum Absorbent (Item 8, WP 0119 00)
Main battery switch OFF and handle removed.
Heater end panel at fuel filler cap end of heater
removed.
REPLACE
WARNING
Fuel is toxic. Be sure to place a petroleum absorbent mat or tray below the
fuel pump to collect any fuel. Be sure to wipe up any spills with a rag.
1. Remove heater end panel at fuel filler cap end of heater. Remove external fuel hose from fitting on
inboard side of end panel. Set cover and all hardware aside.
2. Remove the return fuel tube (1) by removing the nut (2) on the top of the 3-way solenoid valve fitting
(3) and the nut (4) on the fuel return to tank fitting (5). Set the return fuel tube aside.
3. Remove burner feed line (6) from elbow fitting (7) on the right side of the 2-way solenoid valve (8).
4. Note the orientation of the elbow fitting (7), and remove the elbow fitting from the right side of the 2-
way solenoid valve (8). Clean residual sealant or antiseize tape from fitting and set aside.
5. Remove the fuel hose fitting (9) entering the tee fitting (10) on the 2-way solenoid valve (8).
6. Disconnect the solenoid wire harness (11) from the 2-way solenoid valve (8).
7. Remove the two screws (12) at the base of the 2-way solenoid valve (8). Set the screws aside.
8. Remove the defective 2-way solenoid valve (8).
9. Note the orientation of the tee fitting (10), and remove the tee fitting from the left side of the 2-way
solenoid valve (8). Clean residual sealant or antiseize tape from the fitting and set aside.
10. Apply fresh thread sealant to the threads of the tee fitting (10), and install the tee fitting on the new 2-
way solenoid valve (8). Ensure the fitting is secure and correctly aligned.
0032 00-1
