DETROIT DIESEL 53
3.3
AIR SHUT-DOWN HOUSING
1. Remove the pin from the end of the shut-down shaft.
The air shut-down housing on the V-type engine has the
Then remove the washer from the shaft and the seal
air shut-down housing mounted on the top of the blower.
ring from the housing.
The housing serves as a mounting for an air cleaner
mounted away from the engine. The air shut-down
2. Remove the two pins that secure the shut-off valve
housing contains an air shut-off valve that shuts off the
to the shaft.
air supply and stops the engine whenever abnormal
operating conditions require an emergency shut-down.
3. Remove the bolt, lock washer and plain washer
which attach the latch to the housing. Then remove the
Remove Air Shut-Down Housing
latch, latch spring and spacer.
1. Disconnect and remove the air ducts between the air
4. Note the position of the air shut-off valve spring and
cleaner and the air shut-down housing.
the valve (Fig. 2); then withdraw the shaft from the
housing to release the valve and the spring. Remove
2. Disconnect the control wire from the air shut-off cam
the valve and spring and the seal ring from the housing.
pin handle.
5. Remove the cam pin handle and withdraw the tam
3. Remove the bolts and washers that retain the
from the shaft.
housing to the blower and remove the housing from the
blower. Remove the air shut-down housing gasket from
Inspection
the blower.
Clean all of the parts thoroughly, including the blower
NOTE: Cover the blower opening to
screen, with fuel oil and dry them with compressed air.
prevent dirt or foreign material from
Inspect the parts for wear or damage. The face of the
entering the blower.
shut-down valve must be perfectly flat to assure a tight
seal when it is in the shut-down position.
Disassemble Air Shut-Down Housing
Refer to Fig. 1. and disassemble the air shut-down
housing
as
follows:
1970 General Motors Corp.
October, 1970
SEC. 3.3 Page 1
