LUBRICATION SYSTEM Description LU-3
A pressure feeding lubrication system has been
adopted to supply oil to the moving parts of this
engine. The lubrication system consists of an oil
pan, oil pump, oil filter and other external parts
which supply oil to the moving parts in the engine
block. The oil circuit is shown in the illustration at
the top of the previous page. Oil from the oil pan is
pumped up by the oil pump. After it passes through
the oil filter, it is fed through the various oil holes in
the crankshaft and cylinder block. After passing
through the cylinder block and performing its lubri-
cating function, the oil is returned by gravity to the
oil pan. A dipstick on the center left side of the
cylinder block is provided to check the oil level.
OIL PUMP
The oil pump pumps up oil from the oil pan and
sends it under pressure to the various parts of the
engine. An oil strainer is mounted in front of the
inlet to the oil pump to remove impurities. The oil
pump itself is a trochoid type pump, which uses a
drive rotor and driven rotor inside the pump body.
When the drive rotor rotates, the driven rotor rotates
in the same direction. The axis of the driven rotor
shaft is different from the center of the driven rotor,
so when both rotors rotate, the space between the
two rotors changes. Oil is drawn in when the space
widens and is discharged when the space becomes
narrow.
OIL PRESSURE REGULATOR (RELIEF VALVE)
At high engine speeds, the oil pump supplies
more oil to each part that is necessary. For this
reason, an oil pressure regulator which works to
prevent oversupply of oil is installed on the oil
pump. During normal oil supply, a coil spring and
valve keep the by-pass closed, but when too much
oil is being supplied, the pressure becomes ex-
tremely high, overpowering the force Of the spring
and opening the valves. This allows the excess oil
to flow through the valve and return to the inlet of
the oil pump.
OIL FILTER
The oil filter is a full flow type filter with a built-in
paper filter element. Particles of metal from wear,
airborn dirt, carbon and other impurities can get in
the oil during use and could cause accelerated wear
or siezing if allowed to circulate through the engine.
The oil filter, integrated into the oil line, removes
these impurities as the oil passes through it. The
filter is mounted outside the engine to simplify
replacement of the filter element. A relief valve is
also included ahead of the filter element to relieve
the high oil pressure in case the filter element
becomes clogged with impurities. The relief valve
opens when the oil pressure overpowers the force
of the spring. Oil passing through the relief valve
by-passes the oil filter and flows directly into the
main oil hole in the engine.
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Страница 166: ...FUEL SYSTEM Injection Pump FU 27 INJECTION PUMP REMOVAL OF INJECTION PUMP ...
Страница 169: ...FU 30 FUEL SYSTEM Injection Pump COMPONENTS ...
Страница 170: ...FUEL SYSTEM Injection Pump FU 31 COMPONENTS Cont d ...
Страница 171: ...FU 32 FUEL SYSTEM Injection Pump COMPONENTS Cont d ...
Страница 251: ...LU 4 LUBRICATION SYSTEM Troubleshooting TROUBLESHOOTING ...
Страница 255: ...LU 8 LUBRICATION SYSTEM Oil Pump OIL PUMP COMPONENT ...
Страница 262: ...LUBRICATION SYSTEM Oil Cooler Relief Valve and Check Valve LU 15 OIL COOLER RELIEF VALVE AND CHECK VALVE COMPONENTS ...
Страница 272: ...ST 4 STARTING SYSTEM Pre Heating System Super Glow Type TIMER CHARACTERISTIC DIAGRAM Cont d ...
Страница 281: ...STARTING SYSTEM Troubleshooting Starting System Circuit ST 13 TROUBLESHOOTING STARTING SYSTEM CIRCUIT ...
Страница 282: ...ST 14 STARTING SYSTEM Starting System Circuit STARTING SYSTEM CIRCUIT Cont d ...
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Страница 343: ...C 1 SSTAND SSM Page SST SPECIAL SERVICE TOOLS C 2 SSM SPECIAL SERVICE MATERIALS C 6 ...