Mitsubishi S6R2 Series User Manual

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Chapter 8 FUEL SYSTEM
2.3.2 Fuel Injection Nozzle Spray - Inspect
When adjusting the nozzle opening pressure with the nozzle
tester, inspect for nozzle orifice clogging, fuel spray pattern
and dripping. If spray condition is faulty, clean or replace
the nozzle tip.
Checking points of fuel spray are as follows:
Injection spray is straight.
The spray is of fine fuel droplets without big drops.
No dripping is shown after injection.
Fuel Injection Nozzle Spray - Inspect
2.3.3 Nozzle Tip - Clean and Replace
(1) Remove the retaining nut.
(2) Remove the nozzle tip.
Nozzle Tip - Remove
(3) Clean the needle valve and body of nozzle tip.
When cleaning the needle valve and nozzle tip body,
use clean wash oil. Assemble the needle valve and body
in clean diesel fuel after cleaning.
(4) Tighten the nozzle tip retaining nut to the specified
torque.
(5) If the spray pattern is still faulty after cleaning and
adjusting, replace the nozzle tip with a new one.
New nozzle tips are coated with anti-corrosive agent.
Wash the nozzle tips before use. First wash them in
wash oil, and wash it again with clean diesel fuel before
installation.
Nozzle Tip - Clean
Good
Large
angel
spray
After
dribble
Intermittent
spray
Whirling
spray
Faulty spray
(a) Be careful not to hit the nozzle tip.
(b) The needle valve and body are precision parts.
Handle them carefully, and do not change the
original valve and body combination.
Loosen adjusting screw.
Screw adjustment type spec
Retaining nut
Nozzle tip end

Mitsubishi S6R2 Series Specifications

General

Brand	Mitsubishi
Model	S6R2 Series
Category	Engine
Language	English