Westerbeke W-46 - Page 68

FUEL SYSTEM -.
2. Reassembly Sequ~nce
Follow the reverse of dis-assembly sequence.
(NOTE: If the needle v.alve and nozzle proper have to ·be re-
placed, be sure to wash the repla-cement. parts. in. a pool
of kerosene after removing their protective films of
plastic: wash off the rust preventive oil from the nozzle
proper by stroking the needle valve back and forth in the
needle valve stem bore.)
d. Inspection
Needle valve and nozzle body
1. Immerse needle valve and nozzle body in a pool of clean kero-
sene, insert the valve in to the body, and move the valve
back and forth to be sure that the sliding contact is smooth
without evidencing any excessive clearance. The entire
injection nozzle must be· replaced if the fit is found
defective.
2. Visually examine the nozzle body with a magnifying glass
having a power of 4 or 5.
3. Inspect the needle valve for distortion or damage at its
seating part and for wear of its end face in contact with
the pressure pin.
4. Poor seating contact may be corrected, if the defective
condition has not advanced too far, by lapping the valve
against the seat with a coat of clean lube oil applied to
the seating faces. If this does not help, the injection
nozzle must be replaced.
Nozzle holder and distance piece.
Check the fit between nozzle holder and distance piece.
Determine the quality of the fit from contact patterns obtained
with the use of red lead paste: defective fit will be obvious
by an abnormally high rate of return oil (leak-off) flow.
Pressure spring and pressure pin.
1. Replace any pressure spring that is
otherwise defective, and out of square.
carefully for these defects.
broken, cracked or
Inspect each spring
2. Inspect each pressure pin for wear at its end faces, one for
pressure spring and the other for needle valve.
Leak-off pipe packing
If the packing is found to be in a deteriorated condition,
replace it.
lwiWES7ERBEKE
l Engines & Generators
66