Westerbeke W-46 - Page 56

LUIIRlCATION SYSTEM
3. Oil Filt.er
The filter is mounted on the right-hand side of the crankcase at
its center part. The oil bypass valve for letting the oil bypass
the filter is actually a relief valve located in the center por-
tion of the element. This valve is set to open when the differen-
tial pressure across the filter rises to l.0+0.2kg/cm2
(14. 2±2· 8psi) 1 when the valve opens, the oil flows directly from
the inlet side to the outlet side. The filter must be
serviced regularly or before the filter becomes so dirty that it
actuates the bypass valve.
The oil filter has a built-in
relief valve operating in
response to the oil pump
discharge pressure. This valve
starts relieving when the
pressure rises to 3+0. 3kg/cm2
(43~4.3psi), thereby- bleeding
the excess oil to the oil pan
and limiting the pressure of
oil reaching the engine oil
gallery to a constant level.
3.1 Disassembly
1. Remove filter (1) and relief
valve (2) from filter
bracket· ·(3).
3. 2 Inspection
The engine oil and oil filter must be
· replaced after the first 50 hours of
engine break-in. Then replace the oil
and filter every 100 hours of engine
operation.
Being consc:;:ious about regular oil and
filter changes should have a beneficial
affect on the engine in reducing internal
engine wear.
- ........ '*'' ~
A good preventative maintenance step to
follow every third of fourth oil change
is to take a sample of the engine oil
being removed (6-8 ounces) and have a
spectrographic analysis performed on the
oil. This will show what type of internal
wear is taking place as the engine
accumulates operating hours.
Service Facility: Sample kits are available from them.
Analysts, Inc
2450 Hassell Road
Hoffman
Estates, IL 60169
800-222-0071
1-w"IWESIEHBEKE
f Engines & Generators
54