Figure 7. Measuring Relationship of Gage to
Figure 6. Measuring Relationship of Bevel Seat
Cylinder Head Fire Deck
in Injector Tube to Cylinder Head Fire
with compressed air. Then perform the second reaming operation as follows:
a. Place a few drops of cutting oil on the bevel seat of the tube. Carefully lower reamer J 5286-9 into the
injector tube until it contacts the bevel seat.
b. Make a trial cut by turning the reamer steadily without applying any downward force on the reamer.
Remove the reamer, blow out the chips and look at the bevel seat to see what portion of the seat has been cut.
c. Proceed carefully with the reaming operation, withdrawing the reamer occasionally to observe the
d. Remove the chips from the injector tube and, using gage J 25521, continue the reaming operation until
the shoulder of the spray tip is flush to 0.014 inch with the fire deck of the cylinder head as shown in Fig. 7.
Then wash the interior of the injector tube with clean solvent and dry it with compressed air.