Figure 6-23. Checking Check Ball Seat Depth
Remove the injector from the assembly stand, withdraw the plunger (3), and dip it in dean test oil.
Hold the injector in a vertical position with the cup down, and allow the plunger (3) to drip a few drops of test oil
into the cup (16).
Insert the plunger (3) about 0.5 inch (13 mm) into barrel (15) to be certain the plunger is started straight.
Rap the plunger with the palm of the hand, hold it firmly against the seat, and rotate it 90 degrees.
Hold the injector with the cup (16) up. The plunger (3) should slide out when the injector is lifted quickly.
If the plunger (3) does not slide out, remove it, coat the tip with test oil, and repeat steps h and m, above.
If the plunger (3) sticks because of misalignment, loosen injector retainer (12), rotate the cup (16) 1/4 turn, and
retorque it in accordance with steps f, g, and h, above. Repeat as necessary.
Test all injectors in accordance with paragraph 6-17.
Do not install the strainer element (9), filter screen clip (8), or spring (4) at this time.
Lubricate and install the preformed packings (5, 6, and 7).