How To Check Injection Pump Delivery Valve Sealing; Test Data For Injection Pump Delivery - Kohler KD 625/2 Workshop Manual

6
Fuel system
129
131
- 60 -
130
Rod stroke
Control rod
from max
max. force
deliv. point
Newton mm
10
13
0,50
0
10
Rod stroke
Control rod
from max
max. force
deliv. point
Newton mm
9.5
11.5
0,50
0
9.5

How to check injection pump delivery valve sealing

Components:
1 Valves
2 Seat
Adjust pump rack at half-stroke.
Turn flywheel according to its direction of rotation so that the plunger
puts the circuit under pressure.
During this operation the displayed pressure will gradually reach a peak
followed by a sudden drop which corresponds to valve closing.
Pressure drop should be 30÷50 bar.
Replace the valve if pressure drop is below this value.
Repeat the same operation for the other plunger.

Test data for injection pump delivery

Check only maximum plunger difference by positioning rack rod accor-
ding to the indicated delivery value.
R.P.M. Delivery
mm /stroke
3
1500 34÷37
500 7÷11
150 70÷78
500 22÷26
R.P.M. Delivery
mm /stroke
3
1500 34÷37
500 3÷7
150 60÷68
500 13÷18
KD 625-2 Workshop Manual_cod. ED0053029380_1° ed_ rev. 00
Max. plunger
difference
mm /stroke
3
3
3
--------
3
Max. plunger
difference
mm /stroke
3
3
3
--------
3