Chapter 3 Fuel Injection Equipment
4. Adjustment of Fuel Injection Pump and Governor
4LHA Serie
4.
Adjustment
of Fuel
Injection
Pump
and Governor
r
Adjust the fuel injection pump after completing re-
assembly.
The pump itself must be readjusted
with
a
special
pump tester when you have replaced major
parts such as the plunger
assembly,
roller guide
assemb-
ly, fuel camshaft, etc. Procure a pump tester like the
one
illustrated below.
4-1
Preparations
Prepare
for adjustment of the fuel injection pump as
follows:
(1) Adjusting nozzle assembly and inspection of injec-
tion
starting pressure.
MPa(kgf/cni)
Adjusting nozzle type
Injection
starting pressure
See separate
service data
(2) Adjusting injection pipe.
mm (in.)
Inner diaVouter
dia.
x length
See separate
service data
Minimum
bending radius
25
(0.98)
(3) Mount the fuel injection pump on the pump tester
platform.
Tester
used
«
2
Part
code number
Yanmar
110
(4.3307)
150
(5.9055)
121978-51010
(4) Remove the control rack blind cover and fit the
rack
indicator.
Next,
turn
the pinion from the side of the pump
until
the control rack is at the maximum drive side
position,
and set it to the rack indicator
scale
standard
position.
Then
make sure
that
the control rack and rack
indicator slide smoothly.
Control
rack blind cover
Rack
indicator
3-2-31
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