Testing Engine Compression; Testing Oil Pressure; Oil Pressure Sensor - Westerbeke 22.0KW EDE-60Hz Service Manual

INE ADJUSTMENTS
TESTING ENGINE COMPRESSION
Check the compression pressure. To do this wann the engine,
remove all fuel injectors, or glow plugs, disconnect the fuel
shut-off solenoid wire, and install a compression adapter in
the injector hole or glow plug hole. Connect
a
compression
tester on the adapter and crank the engine with the starter
motor until the pressure reaches a maximum value. Repeat
this process for each cylinder. Look for cylinders with dra-
matically (at least
20%)
lower compression than the average
of the others. Compression pressure should not differ by
more than
35.5
psi
(2.5 kglcm2)
at
280
rpm.
STANDARD
CDMPRESSIO~
PRESSURE 512 - 583 PSI (370 PSI LIMIT)
If a weak cylinder is flanked by healthy cylinder, the problem
is either valve or piston related. Check the valve clearances
for the weak cylinder, adjust as needed and test again. If the
cylinder is still low, apply a small amount of oil into the.
cylinder to seal the rings and repeat the test. If compressIOn
comes up - the rings are faulty.
Abnormally high readings on all cylinders indicates heavy
carbon accumulations, a condition that might be
accompanied by high pressures and noise.
NOTE: In case of severe vibrations and detonation noise. the
cause may be fuel injector problems, see FUEL INJEC-
TORS. Poor fuel quality, contaminates and loss ofpositive
fuel pressure to the injection pump will result in injector
faults.
When re-installing the glow plugs use anti-seize compound.
NOTE: Do not guess the conditions of other cylinders from a
result of testing one cylinder. Be sure to measure the
compression pressure for each cylinder. Look for cylinders
with dramatically (at least 20%) lower compression than the
average of the other cylinders.
If
the weak cylinder
is
flanked
by healthy cylinders, the problem is either valve or head-
gasket related. very low compression in an adjacent cylinder
indicates gasket failure. Abnormally high readings on all
cylinders indicate heavy carbon accumulations, a condition
that might be accompanied by high pressure and noise.
TESTING OIL PRESSURE
To test oil pressure, remove the hex head plug from the oil
gallery and install a mechanical oil pressure gauge in its
place. After warming up the engine, set the engine speed at
1800 rpm and read the oil pressure gauge.
Oil PRESSURE BETWEEN 30 AND 40 PSI AT 1800/1500 RPM
NOTE: A newly started, cold engine may have an oil pressure
reading up to 70 or 80 psi. A warmed engine can have an oil
pressure reading as low as 30 psi. Oil pressure will vary
depending upon the load placed on the generator.
OIL PRESSURE SENSOR
An oil pressure sensor is mounted on the oil manifold for
the engine. It sends a voltage signal to the ECU that is
interpreted
as
pressure. Should this signal fall below a
set
point in the ECU, the ECU will open the K2
run
relay,
shutting the unit down.
It
will then display the fault
on
the
LCD Display screen. Engine oil pressure dropping 10 -15 psi
will cause this to occur.
En~ines
& Generators
39