TM 5-4310-386-14
5-22. 2nd and 3rd Stage Valve Head Assembly (Cont).
b. Repair. (figure 5-32)
(1)
Remove 2nd or 3rd stage valve head assembly (para. a. above).
(2)
Remove connector (1) and gasket (2) from valve head (3).
(3)
Remove connector (4) or elbow (5) and gaskets (6) from valve head (3).
(4)
Remove two hex nuts (7), washers (8), and press pad (9).
(5)
Remove two studs (10) from valve head (3).
(6)
Insert two flat tip screwdrivers into the grooves of two valve caps (11) and lift out of chamber.
(7)
Remove two preformed packing (12) from valve cap (11) and discard preformed packing.
(8)
Remove discharge valve (13) and suction valve (14).
(9)
Remove two gaskets (15).
(10)
Clean all components in accordance with Chapter 4, Section VII.
(11)
Inspect all components for cracks, dents, or other damage.
(12)
Install two gaskets (15).
CAUTION
Do not interchange suction or discharge valves. The valve cap of the inlet-valve (suction valve)
protrudes 2.5 mm (0.98 in.) out of the valve head more than the cap for the discharge valve. (Cap
holder is designed accordingly.)
(13)
Install suction valve (14) and discharge valve (13).
(14)
Install two preformed packings (12) on valve caps (11).
(15)
Install two valve caps (11) into chamber.
(16)
Install two studs (10) on valve head (3).
(17)
Install press pad (9), two washers (8), and hex nuts (7).
5-98
