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Group 23 Fuel System
168
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Adjustment of injection intervals
1. For cylinder No. 2 and subsequent cylinders, use
the injection start timing of cylinder No. 1 as the
reference point and check the injection start inter-
vals on the angle scale on the pump tester ac-
cording to the injection sequence.
2. If the injection intervals deviate from the specifi-
cation, make adjustment by adjusting the thick-
ness of the barrel shims in the same way for pre-
stroke adjustment.
NOTE! Injection start intervals 45°±0.5°
Adjustment of Injection Volume
1. Install a fuel hose and the specified fuel pipe to
the fuel injection pipe.
Adjustment conditions.
Nozzle holes
Ø
(10) .... 0.325 mm [0.013 in.]
Nozz. opening press. . 34.32 MPa (350 kgf/cm
Feed pressure
2
MPa (kgf/cm
) [psi] .... 0.3±0.05 (3±0.5) [43.7±7.1]
Fuel pipe dimensions
out
x in
x L ......... (7x2.8x817 mm) [0.28x0.11x32.2 in.]
Ø
Ø
Test fuel ..................... JIS Class 2 diesel fuel
Test fuel temp. ........... 40±10°C [104±18°F]
3. To adjust the injection volume, loosen barrel bolts
and slowly turn the barrel.
4. After adjustment, tighten the barrel bolts alter-
nately to 78 to 83 N
m (8 to 8.5 kgf
●
lbf
ft] torque.
●
2
) [4979 psi]
m) [58 to 61
●
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