CHECKING SHAPE OF FUMES ACROSS NOZZLE TIP
1.
Set the nozzle to a nozzle tester and shoot it
in
the
air.
Check the shape of the fumes.
2.
If the shape
is
defective, replace the nozzle piece.
1. Good
2. Bad
(1)
CHECKING FUEL TIGHTNESS OF FUEL INJECTION PUMP PLUNGER
1.
Set a pressure gauge to the pump.
2.
Rotate the flywheel to increase the pressure to
58.8
MPa
(600 kgf/cm
2
,
8532 psi).
3.
Align the plunger with the top dead
center.
4.
Measure the time needed
to
decrease the initial pressure.
5.
If the measurement is less than allowable limit, replace the pump element.
In
this
case,
ask a
repair shop to do the
replacement.
Be
sure
to
give them adjustment reference data
on
the fuel
injection pump. (Shown below) See engine specifications.
Reference valve 8 seconds or more
Allowable limit 4 seconds
Adjustment
of
Injection
Control rack Speed
Amount of injection
Allowance
(mm3)
position
(*1)
(rpm)
(mm3/st)
(*3)
9
1400 22.5 to 23.5 ±1.5 or less
8
1400
11.2
to 26.2 ±3.8 or less
7 1400
6.0
to 21.0 ±3.8 or less
o to
3.5
1550 0.(*2)
*1:
Travel
distance from non-injecting point of control rack
*2:
Zero opening pressure and no injection
*3:
Allowance
on
the basis of standard cylinder
Profile
of
fuel
pump
cam
1.
Base Circle
114
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