103
C. Adjuster device
The first to check on the injection pump is the control
rod travel.
1.
Fit the fuel feed line and return line to the pump.
Run the pump warm (600 r/min) for 3 minutes.
Unorm = 2.5 V.
2.
Fit the bracket and dial indicator (Volov P/N 998
6551) at the front of the injection pump to measure
control rod travel. The Fig. shows an adapted
bracket.
5.
Check to make sure the dial indicator measuring
probe has contact with the travelled control rod.
Set the dial indicator to 21 mm.
6.
Reduce the variable voltage to 0 V and read-off the
dial indicator. Compare the measured value with
the value given in the diesel standard sheet at C.
Adjuster device with U/norm = min. 0.4–1.1 mm.
If the control rod travel is not within the tolerance,
adjust by replacing the setting device end pin,
which is available in different sizes.
When calculating the size of the end pin, bear in
mind that there must be a 0.1–0.3 mm gap between
the control rod and the end pin when the control
rod is in the non-travel position and the adjuster
device off-circuit.
7.
Thereafter carry out tests 1 and 2 under C. Adjust-
er device adjustment as per diesel test standards
sheet. Tips: Carry out the tests at low pump rota-
tion, e.g., 200 r/min.
Compare the measured values with those given in
the diesel test standards sheet.
Position sensor for control rod travel
(pump speed 0/min)
Test No.
1
U
norm
3.10
V
Control rod travel:
12.95–13.05
mm (Setting value)
12.90–13.10
mm (check value)
2
U
norm
1.70
V
Control rod travel:
5.90–6.40
mm (Setting value)
5.85–6.45
mm (check value)
3
U
norm
min
V
Control rod travel:
0.5–1.0
mm (Setting value)
0.4–1.1
mm (check value)
3.
Switch on the power sources with constant 12 V
voltage to the test control unit.
4.
Switch on the variable power source and slowly
increase the voltage until you can hear the adjuster
device going to its end position.
Note: The adjuster device may only be in the end
position for max. 1 minute, otherwise there is risk
of it catching fire.
