DETROIT DIESEL 53
3.3
AIR SHUT-DOWN HOUSING
Fig. 1 - Typical In-Line Air Shut-Down Housing Details and Relative Location of Parts
1. Remove the pin from the end of the shut-down
The air shut-down housing on the in-line engine is
shaft. Then remove the washer from the shaft and the
mounted on the side of the blower.
seal ring from the housing.
2. Remove the two pins that secure the shut-off valve
The air shut-down
to the shaft.
housing contains an air shut-off valve that shuts off the
air supply and stops the engine whenever abnormal
3. Remove the bolt. lock washer and plain washer
operating conditions require an emergency shut-down.
which attach the latch to the housing. Then remove the
latch, latch spring and spacer.
Remove Air Shut-Down Housing
1. Disconnect and remove the air ducts between the air
4. Note the position of the air shut-off valve spring
cleaner and the air shut-down housing.
and the valve (Fig. 2); then withdraw the shaft from
the housing to release the valve and the spring.
2. Disconnect the control wire from the air shut-off
Remove the valve and spring and the seal ring from
cam pin handle.
the housing.
3. Remove the bolts and washers that retain the
housing to the blower and remove the housing from
5. Remove the cam pin handle and withdraw the cam
the blower. Remove the air shut-down housing gasket
from the shaft.
from the blower.
Inspection
NOTE: Cover the blower opening to prevent dirt
or foreign material from entering the blower.
Clean all of the parts thoroughly, including the blower
screen, with fuel oil and dry them with compressed air.
Disassemble Air Shut-Down Housing
Inspect the parts for wear or damage. The face of the
shut-down valve must he perfectly flat to assure a tight
Refer to Fig. 1 and disassemble the air shut-down
seal when it is in the shut-down position.
housing as follows:
October. 19.70 SEC. 3.3 Page 1
