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Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
ENGLISH
INJECTION NOZZLE FUEL SYSTEM
22.4 Inspection
Never attempt to disassemble the pump unless it is
necessary.If the pump is assumed defective, it is
recommended to replace the pump assembly.
22.5 Assembly
1. Insert the nozzle assembly into the retaining nut so
that the nozzle is correctly seated in the nut.
2. Place the distance piece, retaining pin, pressure
spring and shim washer on the nozzle tip.
3. Tighten the nozzle holder body fully by hand
4. Grip the nozzle holder in a vise. Tighten the
retaining nut to the specified torque.
22.6 Adjustment
Adjust injection starting pressure by increasing or
decreasing the thickness of inserting shim washer.
Varying shim thickness by 0.1 mm [0.0039 in.] causes
injection start pressure to change 0.98 MPa
(10 kgf/
cm
2) [142.3 psi].
Available shims:
10 kinds of shims available from 1.25 mm to 1.7 mm
[0.0492 to 0.0669 in.] in thickness, in increment of 0.05
mm [0.0020 in.].
Figure 98 Inspecting nozzle
Wear
Fatigue and break
Poor contact
Deformation
and break
While immersed in
kerosene, check for
smooth sliding.
Figure 99 Assembling the nozzle
Tightening torque:
34.3 to 39.2 N·m
(3.5 to 4.0 kgf·m)
[25.32 to 28.93 lbf·ft]
Tightening torque:
24.5 to 29.4 N·m
(2.5 to 3.0 kgf·m)
[18.08 to 21.70 lbf·ft]
Return pipe
CAUTION
If required, always replace the nozzle as a complete
assy.
Figure 100 Testing nozzle
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