Reassembling Fuel Injection Nozzle - Mitsubishi Heavy Industries SL Series Service Manual

2.1.4 Cleaning and replacing faulty nozzle
When pulling out the nozzle tip, be careful not to dam-
age the tip.
(1) Loosen the retaining nut, then remove the nozzle tip,
and clean the needle valve and body.
(2) Clean the nozzle tip in clean wash oil. After cleaning,
assemble the needle valve and body in clean diesel fuel.
Note: The needle valve and body are precision parts.
Handle them carefully, and do not change the
combination of the valve and body.
(3) Tighten the nozzle tip retaining nut to the specified
torque.
(4) If the spray pattern is still faulty after cleaning and
adjusting, replace the nozzle tip.
Note: When using a new nozzle tip, remove the anti-
corrosive agent from the nozzle tip, and clean the
nozzle tip in wash oil. Then clean the tip again in the
fuel before assembly.
2.1.5

Reassembling fuel injection nozzle

Reassembling fuel injection nozzle
Needle
valve
Cleaning nozzle tip assembly
34.3 to 39.2 N·m
{3.5 to 4.0 kgf·m}
[25.3 to 28.9 lbf·ft]
49.0 to 58.8 N·m
{5.0 to 6.0 kgf·m}
[36.2 to 43.4 lbf·ft]
FUEL SYSTEM
Body
8-7