Fuel Injectors - Westerbeke 12C- TWO Operator's Manual

ENGINE ADJUSTMENTS
NOTE:
WESTERBEKE recommends that the following engine
adjustments be peifonned by a competent engine mechanic. The
infonnatlon below is provided to assist the mechanic.
FUEL INJECTORS
NOTE:
WESTERBEKE recommends that the following engine
adjustments be peifonned by a competent engine mechanic. The
information below is provided to assist the mechanic.
REMOVING FUEL INJECTORS
NOTE:
Injector must be serviced in a "clean room" environment.
1. Disconnect the high pressure fuel lines from the injectors
and loosen the lines at their attachment to the injection pump
and move them out of the way of the injectors. Avoid
bending the lines.
2. Using a 17mm long socket, remove the fuel return line in its
entirety from the top of the injectors. Take care not to loose
the two sealing washers and banjo bolt that attaches the fuel
return l.ine ,to each injector.
NOTE:
Clean the area around the base of the injector
prior to lifting it out of the cylinder head 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 ..
3. 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 injector is
reinstalled.
INSPECTING THE SPRAY PATTERN
1. Operate the hand lever of the nozzle tester at intervals of
one stroke per second to check if the fuel is injected
correctly in its axial direction. A nozzle is defective if it
injects fuel in an oblique direction or in several separate
strips. Also, a spray in the form of particles indicates a
defect. These defects may sometimes be caused by
clogging with dust and, therefore, all parts should be
carefully cleaned before reassembly.
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DRIP TEST
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2. Apply the pressure of 1635 kg/cm' (115 1b/in') to nozzle
by operating the hand lever, and check the drips from the
nozzle tip. If it drips or has a large accumulation of fuel
on the bottom, it is considered defective and should be
replaced. A very small amount of fuel may sometimes
remain on the tip of the nozzle; however, this does not
indicate a defect.
A
WARNING:
The spray injected from the
nozzle is of such velocity that it may penetrate
deeply Into the skin of fingers and hands,
destroying tissue. If it enters the bloodstream,
FUEL INJECTION PRESSURE 1991 TO 2134 psi,
(140 TO 150 kgl/cm') 13.7310 14.71 MPa
",.N:OllILEINJECTION
INJECTION
PRESSURE TEST
INJECTION TESTING
1.
Using the nozzle tester, check the spray pattern and
injection starting pressure of the nozzle. If it exceeds the
limit, adjust or replace the nozzle. When using a nozzle
testee, take the following precautions:
CHATTERING
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TEST
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NORMAL
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FAULTY -', FAULTY
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INSTALLING
Install the nozzle and nozzle holder assembly in the roverse
order of removal. When installing the nozzle and nozzle
holder assembly, use a new copper washer_
"W'WESTERBEKE
Enginell&cGenerators '
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