DETROIT DIESEL 53
comparator will automatically stop the flow of fuel
after 1000 strokes.
7. After the fuel stops flowing into the vial, pull the
rack out to the no-fuel position.
9. Observe the reading on the vial and refer to Fig. 19
to determine if the injector fuel output fails within its
specified limits. If the quantity of fuel in the vial does
not fall within the specified limits, refer to Trouble
Shooting Chart 6 and Shop Notes in Section 2.0 for
the cause and remedy.
CALIBRATOR J 22410
To check the fuel output. operate the injector in the
calibrator (Fig. 21) as follows.
Fig. 25 - Removing Injector Nut
NOTE: Place the cam shift index wheel and fuel
Clamp the injector into position by operating the air
flow lever in their respective positions. Turn on
the test fuel oil heater switch and preheat the
test oil to 95° to 105 °F.
NOTE: Make sure the counter (Fig. 22) on the
calibrator is preset at 1000 strokes. If for any
1. Place the proper injector adaptor between the tie
reason this setting has been altered. reset the
rods and engage it with the fuel block locating pin.
counter to 1000 strokes by twisting the cover
Then slide the adaptor forward and up against the
release button to the left and hold the reset
fuel block face.
lever in the full up position while setting the
numbered wheels. Close the cover. Refer to the
2. Place the injector seat J 22410-226 into the
calibrator instruction booklet for further
permanent seat (cradle handle in vertical position).
3. Pull the injector racks out to the no-fuel position.
4. Turn on the main power control circuit switch. Then
start the calibrator by turning on the motor starter
NOTE: The low oil pressure warning buzzer will
sound briefly until the lubricating oil reaches
the proper pressure.
5. After the calibrator has started, set the injector rack
into the full-fuel position. Allow the injector to operate
for approximately 70 seconds to purge the air that
may be in the system.
6. After the air is purged, press the fuel flow start
button (red). This will start the flow of fuel into the
vial. The fuel flow to the vial will automatically stop
after 1000 strokes.
7. Shut the calibrator off (the calibrator will stop in
less time at full-fuel).
Fig. 24 - Removing or lnstalling Plunger
8. Observe the vial reading and refer to Fig. 19 to
Follower, Plunger and Spring
determine whether the injector fuel output falls within