B3.9 and B5.9 Series Engines
Section 6 - Injectors and Fuel Lines - Group 06
The chatter test indicates the ability of the needle valve to
move freely and atomize the fuel correctly. An audible
sound will possibly be heard as the valve rapidly opens and
closes. A well-optimized spray pattern will possibly be seen.
NOTE: Used nozzles should not be evaluated for chatter
at lower speeds. A used nozzle can generally be used if it
passes the leakage test.
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing to avoid
NOTE: Make sure that all mating surfaces and pressure
faces are thoroughly cleaned and lubricated with test oil
before assembly. New nozzles must be cleaned and lu-
bricated before assembly.
NOTE: Install the same thickness of shims that were re-
moved in disassembly. Use the pressure spring to make
sure that the shims are installed flat.
Install the shims and pressure spring.
Install the spindle.