TM 5-3810-300-24&P-3
3.3
AIR SHUT-DOWN HOUSING
The air shut-down housing, mounted on the side of the
blower, serves as a mounting for the air cleaner or for air
cleaner ducting. The air shut- down housing contains an
air shut-down valve that shuts off the air supply and
stops the engine whenever abnormal operating
conditions require an emergency shut-down (Section
7.4.1).
Remove Shut-Down Housing
1.
Remove the air cleaner or air cleaner ducts.
2.
Disconnect the Bowden wire assembly from the air
shut-off cam pin handle.
3.
Remove the bolts and washers that retain the
housing to the blower and remove from blower.
Remove air shut-down housing gasket from blower.
Fig. 2 - Air Shut-down Housing Mounting and Bolt
Location
Disassemble Shut-Down Housing
from the shaft. Remove and discard the seal ring from
If necessary, the emergency shut-down valve may be
the housing.
disassembled after the air shut-down housing has been
removed from the blower.
2. Remove the pins that secure the shut-down valve to
the shaft.
Refer to Fig. 1 and dissemble the shut-down valve as
follows:
3. Note the position of the air shut-down spring and
the valve; then, withdraw the shaft from the housing to
1. Use a small punch to remove the pin from the
release the valve and spring in the housing. Remove
shut-down valve shaft. Remove the washer
and discard the seal ring from the housing.
4. Remove the bolt, lock washer and plain washer
from the housing and remove the latch, latch spring and
spacer.
Inspection
Clean all of the parts thoroughly, including the blower
screen, with fuel oil and dry them with compressed air.
Inspect the parts for wear or damage. The face of the
shut-down valve must be perfectly flat to assure a tight
seal when it is in the shut-down position.
Fig. 1 - Typical Air Shut-down Housing Detail and
Relative Location of Parts
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