IMPORTANT: Do not lap the machined surfaces (A) of
the intermediate plate in an attempt to
stop fuel leakage at these locations.
Dowels (spring pins) (B) in plate have to
be removed before surfaces can be
lapped. Removing dowels is not
recommended as removal is likely to
Nozzle Intermediate Plate
damage them, and replacement dowels
are not available as service parts.
If leakage is observed, tighten nozzle retaining nut to a
maximum of 79 Nm (58 lb-ft). Replace injection nozzle
if leakage continues.
PERFORM CHATTER AND SPRAY PATTERN
1. Injection nozzle should chatter very softly, and only
when hand lever movement is very rapid (four to six
downward movements per second). Failure to chatter
may be caused by a binding or bent nozzle valve.
2. Until chattering range is reached, the test oil emerges
as non-atomized streams. When lever movement is
accelerated, sprays should be very broad and finely
A partially clogged or eroded orifice will usually cause
spray to deviate from the correct angle. Spray will also
be steady rather than finely atomized.
3. Disassemble nozzle for cleaning or reconditioning if it
fails to chatter or spray properly.