ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
Inspect washer (18) and plain washer (27) for wear. Discard defective washers.
(f) Inspect air shutdown valve (29) for wear, cracks, and elongated pin holes. Discard valve if defective.
Inspect throttle block (13) for wear and security of roll pin (14). Check that roll pin is not worn or bent.
Replace defective throttle block or roll pin, using pin punch.
Inspect air shutdown bracket (12) and clamp (11) for cracks or deformity Discard defective bracket or
Inspect roll pins and all mounting hardware for wear and damaged threads. Discard defective mounting
hardware or roll pins.
Position preformed packing (25), air shutdown spring (26), air shutdown valve (29), and plain washer (27)
in air shutdown housing (31). When properly positioned, round portion of valve should extend out of
housing, and spring should lay flat on top of valve.
Insert air shutdown shaft (16) through housing (31), preformed packing (25), air spring (26), plain washer
(27), and air shutdown valve (29) If necessary, tap shaft into place using a soft hammer.
Pivot air shutdown valve (29) toward air shutdown housing (31), turn air shutdown shaft (30) to align pin
holes In shaft and valve, and Install dowel roll pins (28). Test for proper installation by pivoting valve
toward housing and releasing valve. Valve should snap freely toward air shutdown cover (6) end of housing
Install air shutdown lever (21) using roll pin (20).
Position 24 V solenoids L2A and L2B (15) In bracket (12), and retain in position using clamp (11), screws
(9), and nuts (10).
Install air shutdown shaft (16), air shutdown spring (17), and washer (18) on 24 V solenoids L2A and L2B
(15), and realign with roll pin (14), and throttle block (13).
Install air shutdown bracket (12) on air shutdown housing (31) using capscrews (7), and lockwashers (8).
Turn air shutdown lever (21) until shaft (16) locks air shutdown valve (29) In the open position.
Using a new air shutdown gasket (5), position cover (6) to housing (31) and secure in place using
capscrews (2), lockwashers (3), and washers (4).
Test action of valve by turning throttle block Valve should snap shut against cover without binding.
Latch valve In the open position and Install the air shutoff valve assembly.
(1) Remove protective covers from turbocharger and air inlet tube openings. Install molded rubber adapters (7 and
8, Figure 4-49) on housing, and secure with hose clamps (3).
(2) Slide clamps (3) over molded rubber adapter (7) and start adapter on air inlet tube. Position air control valve
assembly (52) with 24 V solenoids L2A and L2B (15, Figure 4-50) facing up.
(3) Slide clamps (3, Figure 4-49) over molded rubber adapter (8), and Install adapter on air control valve assembly
(4) Twist air control valve assembly (52) as necessary so that 24 V solenoids L2A and L2B (15, Figure 4-50) are
facing up, and tighten all clamps (3).
(5) Restore electrical plug, cushion clamp, nut, bolt, and washer.