Kohler KD 626/3, Workshop Manual, Page: 54 / 106

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6
129
130
131
132
C 1,000 ÷ 1,100
D 7,445 ÷ 7,455
E 7,500
F 3,000 ÷ 3,025
G 7,225 ÷ 7,275
Fuel system
How to check plunger and barrel for internal leakage
This operation is only diagnostic since pressure changes depend on
the pumping speed.
Connect the delivery union with a 600 bar pressure gauge with safety
valve.
Adjust rack rod at half-stroke.
Turn flywheeI according to its direction so that the plunger puts the
circuit under pressure.
Replace plunger if the displayed pressure is below 300 bar.
Repeat the same operation for the other plungers.
Plunger
How to check injection pump delivery valve sealing
Components:
1 Valve
2
Seat
Adjust pump rack at half-stroke.
Turn flywheeI 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 two pumps.
Ref. Dimensions (mm)
KD Workshop Manual_cod. ED0053029350_
1° ed
_ rev.
00