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 TM 5-1940-277-20
TM 1940-20/2
NOTE
If only diaphragm is to be replaced perform steps 8 thru 11 under removal and steps 1
thru 3 and 7 thru 10 under installation.
If complete valve is to be replaced perform steps 1 thru 7 under removal and steps 4 thru
8 under installation.
4.
Disconnect engine valve inlet line (2 or 3) from engine fuel valve using 5/8 inch wrench. Catch fuel drain in container.
Disconnect engine fuel valve outlet line (4 or 5) to fuel water separator using 5/8 inch wrench. Catch fuel drain in
5.
container.
Using 15/16 inch wrench remove fitting (6) that secures valve to bulkhead.
6.
Wipe up spilled fuel.
7.
8.
Using screwdriver remove two screws (7) securing valve cap (8) to valve body (9).
Remove valve cap (8) from valve body (9) to expose diaphragm (10).
9.
Screw valve handle in to loosen diaphragm clamp.
10.
Remove diaphragm (10) by pulling from cap (8) and clean mounting surfaces of valve body (9).
11.
INSTALL:
1.
Install replacememt diaphragm (10) on valve cap (8) and screw handle out.
2.
Fit valve cap (8) to valve body (9).
Install two screws (7) and tighten with screwdriver.
3.
4.
Using 15/16 inch wrench install fitting (6) to valve body securing valve to bulkhead. Coat fitting threads with pipe tape
and install fitting to valve body (9) securing valve to bulkhead.
Connect engine fuel valve outlet lines (4 or 5) and fuel valve inlet lines (2 or 3) to valve body (9).
5.
6.
Tighten inlet and outlet lines [(2 and 4) or (3 and 5)] using 5/8 inch wrench.
7.
Insure fuel valve is open.
8.
Open master fuel shutoff valve (1).
9.
Bleed fuel system (refer to paragraph 3-64).
Close engine and battery hatches.
10.
3-132
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