Westerbeke W-46 - Page 53

LUBRICATION· SYSTEM
1. Lube Oil Circulation
A trochoid rotary pump draws oil from the oil pan through the oil
strainer and delivers it under pressure to a full-flow oil filter,
then the cleaned oil is forwarded into the oil gallery inside the
crankcase. From the gallery, the oil is distributed to the
various parts of the engine. The pump is driven from the
camshaft. The oil filter is a replacable cartridge-type element,
through which the oil is forced.
2. Oil Pump
The pump is located inside the right-hand rear portion of the
crankcase. Its main shaft is driven from the skew gear formed to
the camshaft.
2.1 Disassembly
a. Loosen and remove the four capscrews and washers (9,10)
securing oil strainer (11), gasket (12), and oil pump cover (8)
to the oil pump (3), and separate the strainer, gasket, and
cover from oil pump case.
b. To facilitate removal of
outer rotor (5), turn the
oil pump case upside down.
c.
Drive out the oil pump drive
gear
taper
pin
(2)
and
remove
drive gear
(1)
from
main shaft ( 4) • Pull out
the
main shaft from pump case.
d.
Drive out inner rotor pin
(7) and
separate inner rotor
( 6)
and outer rotor ( 5) from
51
3
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14
13
4
11