TM 5-4220-225-14
4-23. Adjustable Exhaust Valve (Cont).
(7) Install new preformed packing (14) and valve body (13) and secure with two screws (11) and lockwashers (12).
Torque screws to 15-20 in.-lb (1.7-2.3 Nm).
(8) Install new preformed packing (10) and poppet valve (9) and secure with chin button (8).
(9) Install spring (7) and cover (6), with handle (1) installed.
(10)
Line up cutout in handle (1) with mounting hardware hole and install screw (4) and lockwasher (5).
(11) Line up cutout in handle (1) with mounting hardware hole and install screw (2) and lockwasher (3).
(12) Torque screws to 15-20 in.-lb (1.7-2.3 Nm).
b. Repair. (figure 4-17)
(1) Remove adjustable exhaust valve (para a.).
(2) Remove diffuser (1) from valve body (2).
(3) Remove diaphragm retainer (3) and diaphragm (4).
(4) Remove straight pin (5) and stop pin (6) from handle (7).
(5) Remove pin (8) and remove valve handle (7) from valve cover (9).
(6) Remove setscrew (10) and friction drag insert (11).
(7) Remove spring tension adjusting screw (12) from handle (7).
(8)
Inspect diffuser (1) and replace if torn.
(9) Inspect diaphragm (4) and replace if worn, cracked, or otherwise damaged.
(10) Inspect stop pin (6) and replace if worn or bent.
(11)
Inspect handle (7) and replace if cracked, bent, or otherwise damaged.
(12) Inspect valve cover (9) and replace if cracked or bent.
(13) Inspect valve poppet assembly (13) and remove preformed packing (14) and replace if bent, scored, or otherwise
damaged.
(14) Inspect spring (15) and replace if cracked, deformed or otherwise damaged.
(15) Replace friction insert (11).
(16) Inspect chin friction (16) and replace if cracked.
4-48
