6.3
Section 6
Lubrication System
6
1. Drain the oil from the engine crankcase.
2. Allow the oil filter to drain.
3. Before removing the oil filter, clean the area
around the oil filter to keep dirt and debris out of
the engine. Remove the old oil filter. Wipe off the
surface where the oil filter mounts.
4. Place a new replacement filter in a shallow pan
with the open end up. Pour new oil of the proper
type in through the threaded center hole. Stop
pouring when the oil reaches the bottom of the
threads. Allow a minute or two for the oil to be
absorbed by the filter material.
5. Apply a thin film of clean oil to the rubber gasket
on the new filter.
6. Install the replacement oil filter. Tighten the oil
filter until the rubber gasket contacts the filter
adapter, then turn the filter an additional
3/4 to 1 turn.
7. Reinstall the drain plug and torque it to
7.3-9.0 N·m (65-80 in. lb.).
8. Fill the crankcase with new oil of the proper type
to the "F" mark on the dipstick.
9. Start the engine and check for oil leaks. Correct
any leaks before returning the engine to service.
Check oil level to be sure it is up to but not over
the "F" mark.
Full Pressure Lubrication System
Operation
This engine uses a full-pressure lubrication system
that delivers oil, under pressure, to the crankshaft,
camshaft, balance shaft, and connecting rod bearing
surfaces. In addition to lubricating the bearing
surfaces, the lubrication system operates the hydraulic
valve lifters.
A high efficiency Gerotor™ oil pump is located in the
closure plate and is driven directly by the balance
shaft. The oil pump maintains high oil flow and oil
pressure, even at low speeds and high operating
temperatures. A pressure relief valve in the closure
plate limits the maximum pressure of the system.
For a cold engine at start up, the oil pressure can
reach up to 60 psi. For a warm engine (normal
operating temperature), at idle speed, the oil pressure
can go down to 12 psi.
Service
Remove the oil pump cover on the PTO side of the
closure plate to service the rotors.
The closure plate must be removed to service the oil
pickup and oil pressure relief valve.
See Figures 6-6, 6-7, 6-8, and 6-9. Also refer to the
Disassembly and Reassembly sections for lubrication
system components removal and installation
procedures.
Inner Rotor
Balance Shaft
Outer Rotor
Figure 6-6. Gerotor™ Oil Pump.
Oil Pickup
Figure 6-7. Oil Pickup.
Relief Valve
Bracket
Hex Socket
Screw
Spring
Piston
Valve Body
Figure 6-8. Original Design Oil Pressure Relief.
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