Isuzu A-4BG1 Workshop Manual page 141

I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I II II I I I I I II II II II II I I I I I I I I I
. FUELSYSTEM 8-5
II
@ INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discov-
ered during inspection.
O 0 e ,
Push Rod Spring
Check the push rod spring for wear, weakness, and cor-
rosion.
Nozzle Holder Push Rod
1. Check the nozzle holder push rod curvature.
2. Check the nozzle holder push rod and needle valve
contact surfaces for excessive wear and poor con-
tact.
Injection Nozzle
1. Check the injection nozzle needle valve, the valve
seat, and the injection nozzle hole for carbon
deposits.
if carbon deposits are present, the injection nozzle
and the needle valve must be replaced.
2. Hold the nozzle body vertically.
Pull the needle valve about one-third of the way out
of the nozzle body.
Release the needle valve.
Check that the needle valve falls back into the nozzle
body as far as the valve seat.
If the needle valve does not fall back into the nozzle
body as far as the valve seat, the injection nozzle
and the needle valve must be replaced.
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