sharp tools, emery paper, grinding powder, or abra-
sives of any kind. If necessary clean outer surfaces
of nozzle body (9) with a brass brush but, do not at-
tempt to scrape carbon from nozzle surfaces, because
severe damage to spray hole can result. Use a soft,
oil soaked cloth to clean nozzle valve. Clean interior
of nozzle cap nut.
f. Inspect. Inspect tappet surfaces of injector body
for nicks or roughening. If damaged, replace injector
g. Repair. If cleaning will not eliminate a nozzle
defect, replace nozzle.
loosening adjusting screw (3).
(1) Rinse valve (7, figure 7-46) and nozzle (9)
thoroughly in clean fuel oil before assembly. Valve
must be free in the nozzle. Lift valve (7) about one-
third out of nozzle and release; valve should slide
back to seat without aid when assembly is held at 45
degree angle. If necessary, work valve into nozzle
body. Using dry compressed air, blow out fuel inlet
(2) Remove all pressure on nozzle spring by
Figure 7-46. Fuel Injector