Northern Lights and NL1066H3 Operator's Manual - page 26
ONL2-2 7/13
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NOTE: Do not scrape or disturb the tefl on coat-
ing on the nozzle body above the carbon stop seal
groove. This coating will become discolored during
normal operation, but this is not harmful. Do not use
a motor driven brush to clean up nozzle body.
Figure 19
5. Install seals on injection nozzle.
NOTE: Each time an injection nozzle is removed
from the cylinder head, replace carbon stop seal (B)
with a new one.
a. Position JD258 (ROS16477) Pilot Tool
(Figure
16-C)
over nozzle tip. If Pilot Tool (included in
cleaning kit) is not available, use a No. 16189
Nozzle Protector Cap found on every new or re-
placement nozzle.
b. Position a new carbon stop seal
(Figure 19-B)
on
pilot tool. Use a new seal washer
(Figure 19-A)
to
help slide the carbon seal into place until it seats
in its groove on nozzle body.
c. Continue to slide upper sealing washer onto
nozzle body until it seats against inlet fi tting.
6. Install injection nozzles:
NOTE: Before installing injection nozzles, make sure
nozzles are clean and free from oil or grease. Do not
grease or oil the nozzles.
a. Remove plug (if installed previously) from nozzle
bore in cylinder head and blow out bore with
compressed
air.
b. Make sure that the sealing surface of the
cylinder head (on which the seal washer will be
resting) is smooth and free of damage or dirt.
This could prevent proper sealing. Dirt and
roughness could also cause distortion to nozzle
when the attaching screw is tightened, making
the valve stick.
c. Install nozzle in cylinder head using a slight
twisting motion as nozzle is seated in bore.
d. Install spacer and cap screw. Do not tighten
capscrew at this stage.
Install injection nozzles (continued):
Figure 20: Shows relationship of parts required for installation.
e. Connect fuel pressure line to nozzle. Leave
connection slightly loose until air is bled from
system.
f. Tighten nozzle hold-down capscrews to 27 foot
lb. (37 N• m).
g. Install leak-off assembly.
h. Bleed air from loose injection line connection.
Tighten connection using two wrenches.
SP12. INJECTION PUMP
1. Since operating conditions may vary considerably,
it is diffi cult to give a defi nite service interval.
Service of the fuel injection pump should only be
done if checks indicate pump malfunction.
2. Black smoke can be an indication of pump
malfunctions. Before servicing pump, check the
other possible causes.
Servicing