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LUBRICATION SYSTEM
OIL PUMP
Using a micrometor, cylinder gauge, depth gauge and feeler gauge, measure the following oil pump clearances.
Replace if wom or out of specification.
<D
Inner diameter of pump body
29.04 mm (1.143 in) or more
@ Clearance between outer rotor and body
0.36 mm (0.014 in) or more
@ Heigth of outer rotor
14.96 mm (0.589 in) or less
@
Clearance between rotor and body side
0.11 mm (0.0043 in) or more (incl. wear of the pump
cover)
@ Clearance between outer rotor and inner rotor
0.16 mm (0.006 in) or more
O-Ring
--~«b>-~
@>
$~
@
•
Pump body
--~
Inner rotor
~
I
S~4
Pin
c(?
~~
Oil pump cover
---c.
@
@
OIL INSPECTION
Always observe the old oil as it is removed. A yellow/gray
emulsion indicates the presence of water in the oil. Although
this condition is rare, it does require prompt attention to
prevent serious damage. Call a competent mechanic if water
is present in the oil. Water present in the oil can be the result
of a fault in the exhaust system attached to the engine andlor
a siphoning through the water cooling circuit into the
exhaust, filling it up into the engine. Use an oil test kit and
send a sample of the engine oil to a qualified oil test lab for
analysis.
WIPE THIS SURFACE
CLEAN BEFORE
/lV~/~Ll./lV"
FILTER
OIL FILTER ASSEMBLY
PRESSURE SWITCH
~
WESTERBEKE
Engines & Generators
32
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