TM 9-4520-251-14
4-57 CHECK VALVE (CONT)
Location/Item
Action
Remarks
REMOVAL
W A R N I N G
Gasoline used in operating this heater is explosive.
Avoid open flame near spilled or drained gasoline.
Make sure a Class 20-B:C fire extinguisher is in easy reach.
Dispose of waste gasoline in a safe manner.
CAUTION
Check valve is an assembly of two parts. Do not separate. Remove as
an assembly.
NOTE
When repairing or replacing fuel line fittings, gasoline may drain out. Drain
into a suitable container.
2.
Check valve
Disconnect fuel tube (2) at tube nut (3).
elbow (4) and check valve (1).
TESTING
Remove
Death or severe injury might result when compressed air is used to
blow dirt from skin or clothing. Air entering body openings is extreme-
Iv dangerous. Compressed air used for cleaning shall not exceed 100
psi (690 kPa). Use goggles or face shield for eye protection.
3. Check valve
Direct compressed air into check valve (1) against
direction of arrow on side of check valve. There
should be no air flow through check valve. Air
flow indicates valve is defective. Replace.
Install check valve (1) on nozzle holder (5). Install
elbow (4) on check valve, and connect tube (2) using
tube nut (3).
Tighten all connections sufficiently to prevent leakage.
NOTE
INSTALLATION
4.
Check valve
5.
Check valve
Install fan and hub assembly as described in paragraph 4–50.
4-140
