3.3 Air Shut-down Housing
Detroit Diesel 53
2. Install a new seal ring at each end of the shaft. Be
sure the seals are seated in the counterbores of the
3. Install the cam and cam pin handle on the shaft.
4. Install a washer and retaining pin at the other end of
5. Assemble the spacer (bushing), spring and latch to
the shut-down housing with the 1/4"-20 bolt, lock washer
and plain washer.
Fig. 1. - Installing Air Shut-Off Valve Spring and Valve
Align the notch on the bushing with the
Assemble Air Shut-Down Assembly
notch on the latch and lock the bushing In
The holes for the cam pin handle and the retaining pins
must be drilled, using a 1/8" diameter drill, at the time a
Install the pins in the valve(s) to retain it to
new service shaft or air shut-off valve(s) is assembled.
the shaft with the cam release latch set and
The valve(s) must be in the same plane within .03"
the valve(s) in the run position.
when in the stop position (flush with the housing face).
Refer to Fig 1. and proceed as follows:
1. Place the valve(s) and spring in position in the
housing (Fig.1.) and slip the shaft in place. The shaft
Adjust the bushing so the valve(s) contacts
must extend .70" from the side of the housing where the
the housing when the cam release latch is
shut-down latch is assembled.
Fig. 2. - Location of Air Shut-Down Housing Mounting
1970 General Motors Corp.