4. Locate the adaptor plate on top of the
support bracket by positioning the 3/8-inch
diameter hole at the far right of the adaptor
plate onto the 3/8-inch diameter dowel pin. This
allows the adaptor plate to swing out for
mounting the fuel injector.
5. Mount the injector through the large hole and
insert the injector pin in the proper locating
pinhole (Fig. 11).
6. Swing the mounted injector and adaptor
plate inward until they contact the stop pin at the
rear of the support bracket.
Clamping the Fuel Injector
1. Refer to Fig. 13 and position the injector
a. Lever 2 up and to the rear
Figure 13. Injector in Position for Testing
with Tester J 23010
b. Lever 3 in the rear detent
c. Lever 4 up (horizontal)
d. Lever 5 up (horizontal)
2. Align the clamping head nylon seals over the injector filter caps (Fig. 12).
3. Back off the thru-flow valve about halfway to allow the self-aligning nylon seals to seat properly during the
4. Hold the clamping head in position over the filter caps and, with the left hand, operate pump lever 1 evenly
to move the clamping head down to seal the filter caps.
The thru-flow valve should still turn freely. If it does not, turn the valve counter-clockwise until it
rotates freely and reapply clamping pressure.
Excessive force on lever 1 during clamping can damage the seals in the valves operated by levers 4 and 5.
Move lever 4 down and operate pump lever 1 to produce a test oil flow through the injector. When air bubbles
no longer pass through the clear discharge tubing, the system is free of air and is now ready for testing.
Injector Valve Opening and Spray Pattern Test
This test determines spray pattern uniformity and the relative pressure at which the injector valve opens and
fuel injection begins.
1. Clamp the injector properly and purge the air from the system.
2. Move lever 4 down.