Isuzu NKR 4J Series - Injection Nozzle Disassembly (4 JG2 Engine); Injection Nozzle Inspection (4 JG2 Engine)

6C - 10 ENGINE FUEL
DISASSEMBLY (4JG2 Engine)
• Grip nozzle holder with a vise, loosen retaining nut and
disassemble.
• Loosen holder nut and remove the nozzle.
CAUTION
• Be careful not to damage the needle valve.
• Remove spacer, positioning pin, and push rod.
• Remove spring and adjusting shim.
CAUTION
• Wash all the parts removed and arrange them on a
cylinder basis, care should be taken not to miss any
parts.
• Soak the nozzle assembly in a parts receptacle filled
with light oil.
• Care should be taken not to miss shim, if used.
INSPECTION (4JG2 Engine)
Nozzle
• Soak the nozzle removed in clean light oil, wash
nozzle body and needle valve separately, and check
and see that the needle valve slide smoothly in the
nozzle body.
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