20
OL944D 11/13
SP13. 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
injection 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 gear by engaging
Servicing
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
above, 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.
Figure 9: Timing Marks
c. (cont.)
the turning socket (part #5830973100) with the
crankshaft pulley nut and turn it clockwise (when
viewed at the front of the engine). Stop where
the “O” mark on the outside of the crankshaft
pulley is aligned with the pointer on the timing
gear case. To check Top Dead Center of the No.
1 cylinder, move the rocker arms of the inlet and
exhaust valves up and down, checking that the push
rods do not push up the rocker arms of the valves.
This is Top Dead Center of the No. 1 piston. If
the pushrods do push up the rocker arms, rotate
the crankshaft one more turn.
d. Remove the pump support bracket on rear of
pump.
e. Remove the 4 mounting nuts.
f. Take the pump to your Northern Lights dealer or
an injection pump repair station for testing and
service.
