Injection Nozzle Reassembly (4Jg2 Engine) - Isuzu NHR 4J Series Workshop Manual

CAUTION
• If the needle valve does not slide smoothly repair or
replace with a new nozzle assembly.
Nozzle lapping procedure
• Apply thinly a compound (Chrome oxide kneaded with
an animal oil) to the seat of needle valve and lap.
6C-10-1.tif
CAUTION
• Excess compound may cause worn needle valve, and
be sure to wash out the compound after lapping.
Nozzle body & needle
• Check nozzle body and end for seizure.
If significantly seized, replace as a nozzle assembly
basis. Also replace as a nozzle assembly basis, if
needle valve end is deformed or seized.
6C-10-2.tif
CAUTION
• If either nozzle body or needle valve is faulty, replace
with a new nozzle assembly.
6C-10-3.tif
REASSEMBLY (4JG2 Engine)
To reassemble, follow the removal steps in the reverse order,
noting the following point.
CAUTION
• Be careful to fit spacer because positioning pins are
set off.
6C-10-4.tif
ENGINE FUEL 6C - 11