Fuel Injectors; Fuel Injection Pump; Glow Plugs - Westerbeke W35B Operator's Manual

FUEL SYSTEM
FUEL INJECTORS
In case of severe vibrations and detonation noise, have the
injectors checked
and
overhauled by an authorized fuel
injection service center. Poor fuel quality, ccintaminants and
loss of positive fuel pressure to the injection pump can result
in injector faults. Since fuel injectors must be serviced in a
clean room enviroment; it is best to carry at least one extra
injector
as
a spare should a problem occur.
Before. removing $e old injector, clean the area around the
base of the injector to help prevent any rust or debris from
· falling down into the injector hole. If the injector will not
lift
out easily and is held in by carbon build-up or the like, work
the injector side-to-side with the aid of the socket wrench to
free it, and then
lift
it out.
The injector seats in the cylinder head on a copper sealing
washer. This washer should be removed with the injector and
replaced with a new washer when the new injector is
installed.·
Injector to Cylinder Head Tightenlftg Torque 40
±
4 ft-lb (5.5
±
0.5 kgf-m)
FUEL INJECTION PUMP
The fuel injection pump is a very important component of
the diesel engine, requiring the u11nost care in handling. The
fuel injection pump has been thoroughly bench-tested and the
owner-operator is cautioned not to attempt.ti:> service it. Ifit
requires servicing, remove
it
and take it to an authorized fuel
injection pump service facility. Do not attempt to disassem-
ble and repair it. ·
The only adjustment the servicing mechanic should make to
the fuel inje,ction pump is the adjustment for engine idle
speed (see IDLE SPEED ADJUSTMENT under ENGINE
ADJUSTMENTS). .
GLOW PLUGS
DESCRIPTION
The glow plugs are wired through the preheat solenoid.
When PREHEAT is pressed at the control panel this solenoid
should "click" on and the glow plug should begin to get hot.
, INSPECTION
To inspect the plug, remove the electrical terminal connec-
tions, then unscrew or unclamp each plug from the cylinder
head. Thoroughly clean each plug's tip and threads with a
soft brush'a114. cleaning solution to remove all the carbon and
-oil
depo~ts.
While.cleaning, examine the tip for wear and
burn erosion; if it has eroded too much, replace the plug.
TESTING
An accurate way to test glow plugs is with an ohmmeter.
Touch one prod to the glow plug's wire connection, and the
other to the body of the glow plug, as shown. A good glow
plug will have a _1.0-1.2. ohm resistance. This method can be ·
used with the plug in or out of the engine. You. can also use
an ammeter to
test
the power drain 10-12 amps per plug).
A
WARNING:
These glow plugs will became very hat
ta the touch. Be careful not ta burn your lingers when
testing the plugs.
Re-install the plugs in the engine and test them again. The
plugs should get very hot (at the terminal end) within 7 to
l)
seconds. If the plugs don't heat up quickly, check .for a shon
circuit. When reinstalling Jhe glow plugs, use anti-seize com-
pound on the threads.
A
WARNING:
Do not keep a glow plug on tor more
· th;in 30 st1eonds.
Glow Plug Tightening Torque
7 -11 ft-lb (1.0 -1.5 m·kg)
_·TESTING A GLOW PLUG.
WITH AN OHMMETER
TESTING A GLOW PLUG
USINP A TEST LIGHT
TERMINAL
.END
TIP
Engines & Generators
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