Injection Pump - Northern Lights OM944W3 Operator's Manual

SP-12. INJECTION PUMP
1. Since operating conditions may vary considerably, it
is difficult to give a definite interval for checking the
injection pump. But as a rule, pump settings,
maximum speed, idle speed and exhaust smoke
should be checked after every 2000 hours of
operation. Service of the fuel injection pump should
only be done if checks indicate pump malfunction.
2. Black smoke can be an indication of pump
malfunction. Before servicing the pump, check other
possible causes:
a. Check cleanliness of the air filter.
b. Check valve clearances.
c. Clean and check injectors.
3. Any repair which involves disassembly of the injec-
tion pump must be carried out by specially trained
mechanics with the proper tools and test equipment.
NOTE: All warranties on the engine become null
and void if the injection pump seals are
broken by unauthorized persons.
4. Injection Pump Removal:
CAUTION: Escaping diesel fuel under pressure
can have sufficient force to penetrate the skin,
causing serious personal injury. If injured by
escaping diesel fuel, see a doctor at once.
a. Clean the injection pump, hoses, and area
around the pump with a cleaning solvent or steam
cleaner.
NOTE: Never steam clean or pour cold water on an
injection pump while the engine is running
or the pump is warm.
b. Remove the injection lines from the
pump and injectors. Remove all lines as an
assembly. Do not remove the spacers. Cover the
ends of the lines, the injector inlets, and the
injection pump outlets to keep dirt out of the
injectors, lines, and pump.
c. Align timing marks on timing gears.
d. Remove the pump support bracket on rear of
pump.
e. Remove the 4 mounting nuts.
Servicing
f. Take the pump to your Northern Lights dealer or
an injection repair station for testing and service.
Figure 9: Timing Marks
5. Injection Pump Installation:
a. Install the fuel injection pump after having
aligned its gear alignment mark with that of
the idler gear alignment mark as shown in
Figure 9 above. When the alignment marks
of the timing gears align as in the diagram to
the right, the No. 1 piston is top dead center in
the compression stroke.
b. Install the injection pump to the side of the
engine first then put in the end bolts, and
then the tube with its bolts, and then the side
bracket.
c. Torque mounting bolts to 13.0 - 18.1 ft/lbs
(17.7 to 24.5 N•m), 1.8 to 2.5 kgf•m.
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