9-12
Lubricating Oil Pump
The crankshaft and camshaft journals are pressure
lubricated, while the cylinders and valve system are
lubricated by the oil mist in the crankcase. The oil
pump is driven by the camshaft through a coupling
on the end of the camshaft. A full-flow oil filter and
low oil pressure cutoff switch are mounted external-
ly (Figure 9-1).
Low Oil Pressure Switch: The genset controller
will blink Fault Code No. 2—Low Oil Pressure if
there is a loss of oil pressure (less than 17 psi).
Nominal oil pressure is 43 psi. See Section 11.
Troubleshooting.
Removing Oil Pump: To remove the oil pump for
service (Figure 9-14), it will be necessary to remove
the flywheel but not to remove the engine from the
base. See Section 7. Fan, Drive Belt, Flywheel,
Ignition, Exhaust to remove the flywheel. Then re-
move the four mounting screws and remove the
pump components (Figure 9-15).
Reinstalling Oil Pump: Clean, service and replace
pump parts as necessary (Figure 9-15) and relubri-
cate before installing. Make sure the shaft engages
the end of the camshaft properly.
OIL PUMP
COVER
FIGURE 9-14. OIL PUMP COVER (ENGINE BOT-
TOM)
O-RING
PUMP
SHAFT
INNER &
OUTER
ROTORS
FILTER
PRESSURE
RELIEF
BALL AND
SPRING
COVER
FIGURE 9-15. OIL PUMP
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