DETROIT DIESEL 53
Fuel Injector 2.1.1
Fig. 22. Setting Calibrator Stroke Counter
Fig. 21. Injector in Calibrator J 224410
COMPARATOR J 7041
To check the fuel output, operate the injector in the comparator (Fig. 17) as follows:
Place the injector in the comparator and tighten the hand wheel to clamp the injector and adapter in position.
IMPORTANT : Make sure the counter on the comparator is preset to 1000 strokes. If, for any
reason, this setting has been altered, raise the cover and reset the counter to 1000 strokes
by pulling the selector wheel to be changed to the right and rotating it to its proper setting
(Fig. 18). Then release the wheel and close the cover. Refer to the comparator instruction
booklet for further information.
NOTE: When installing a low clamp body injector in the comparator, position the injector in
the adapter at approximately a 45 angle, rather than straight into the adapter, then bring it
into a vertical position and secure it in place.
Pull the injector rack out to the no-fuel position.
Start the comparator by
turning on the switch.
After the comparator has
started, push the injector rack in-to the
Let the injector run for
approximately 30 seconds to purge the
air that may be in the system.
After 30 seconds. press the
fuel flow start button. This will start the
flow of fuel into the vial. The
Fig. 23. Removing or Installing
March, 1973 SEC. 2.1.