Figure 3-6. Air inlet housing assembly exploded view
a. Refer to figure 3-6. Remove screen (6). Remove pin (7) from the end of shaft (16), and remove washer (8)
and seal (9) from the end of the shaft.
b. Remove pin (10) that secures the shut-off valve (17) to the shaft.
c Remove screw (11) and lock washer (12) that secures the latch to the housing. Then remove valve latch (13),
spring (14) and bearing (15).
d. Note the position of the air shut-off valve spring (18) then withdraw shaft (16) from the housing to release valve
(17) and spring (18).
e. Remove cam handle (19) and withdraw cam (20) from the shaft. Remove seal (9) from the housing. Remove
pipe plugs (21) and (22) from the housing.
3-34. Inspection and Repair
a. Clean all parts in cleaning solvent, Federal Specification P-D-680, or equivalent, before inspection.
b. Check all parts for excessive wear and replace any parts not in good condition.
c Check the face of shut-down valve (17) for war page. The face of the valve must be flat to assure a
tight seal when it is in the shut down position.
a. Refer to figure 3-6. In a new valve or shaft is to be installed, %/-inch holes must be drilled in the shaft for the
cam handle and valve. The valve must be within 0.03 inch of the plane of the housing opening when the valve is in the
b. Place valve (17) and spring (18) in position in the housing and slide shaft (16) in place. The shaft must extend
0.70 inch from the side of the housing where the shut-down valve is assembled.
a Install a new seal ring (9) at each end of the shaft. Be sure the seals are seated in the counterbores of the