REPAIR INSTRUCTIONS, PART 1
Page 283
Fuel Injector Nozzle Cleaning
[222 KG]
Refer to Figure 319.
When servicing the nozzle holder assemblies,
cleaning of the nozzle tips may be necessary.
Special care must be taken when cleaning the
nozzle tips to avoid damaging the nozzle spray
holes.
319
Figure 319 — Fuel Injection Nozzle Holder Assembly
ULTRASONIC CLEANING METHOD
Ultrasonic cleaning is the preferred method for
cleaning the fuel injector nozzles. Ultrasonic
cleaning units use sound waves or mechanical
vibrations approximately 55,000 cycles per
second above human hearing range. The sound
waves are generated by the transducer, which
changes high-frequency electrical energy into
mechanical energy. Ultrasonic cleaning units,
such as Branson model 1510-MTH, are available
through Process Equipment and Supply
(800-539-6336), web address
www.ultrasoniccleaners.com, or any equivalent
40 kHz ultrasonic-type cleaner could be used.
BRASS BRUSH/WIRE WHEEL METHOD
Cleaning the fuel injector nozzles with a brass
brush or brass wire wheel may be acceptable
under some conditions, but it is not
recommended. The nozzles will be damaged if
a steel wire wheel is used for cleaning. Damage
can also occur if an improper size brass-wire
wheel and/or improper speed is used.
5-111.bk Page 283 Monday, July 10, 2006 2:26 PM
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