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Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
ENGLISH
MAINTENANCE GENERAL
5. After adjustment, perform engine acceleration and
deceleration test to confirm that the engine is free
from hunting and smoking.
5.9 Checking and adjustment of
nozzles
To check and adjust the injection nozzles, use the
following procedure:
5.9.1 Injection start pressure
1. Remove the nozzle assembly to be tested from the
cylinder head and set the nozzle on the nozzle
tester.
Perform air bleeding by moving the tester handle
up and down.
2. Operate the handle at a rate of one discharge a
second or more and read the gage pressure of fuel
injected from the nozzle.
3. If reading of gage pressure exceeds the specified
range, disassemble the nozzle and adjust by using
the adjusting shim.
Increasing or decreasing shim thickness by 0.1
mm [0.0039 in.] will cause injection pressure to
vary about 0.98 MPa (10 kgf/cm2) [142 psi].
4. When reassembling the nozzle, use the following
values of tightening torque:
Figure 25 Testing injection start pressure
Injection start pressure 13.7 MPa
(140 kgf/cm
2
)
[1992 psi]
Table 13 Start pressure
Figure 26 Installing nozzle assembly
H25 to 29 N m
(2.5 to 3.0 kgf m)
[18.08 to 21.70 lbf ft]
Nozzle Tightening torque
Nozzle tightening (to
cylinder head) torque
49.0 to 58.8 N·m
(5.0 to 6.0 kgf·m )
[36.17 to 43.40 lbf·ft]
Nozzle retaining nut
tightening torque
34.3 to 39.2 N·m
(3.5 to 4.0 kgf·m)
[25.32 to 28.93 lbf·ft]
Nozzle union collar
tightening torque
25 to29 N·m
(2.5 to 3.0 kgf·m)
[18.08 to 21.70 lbf·ft]
Table 14 Tightening torque
+1.0
- 0
+10
- 0
+142
- 0
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