Kubota EA330-E4 Series - Page 86

ENGINE
EA330-E4, WSM
1-S21
CAUTION
• Be careful not to come into direct contact with the injected spray destroys any cells it touches. It may also
cause blood poisoning, etc, Check the injection nozzle after confirming that nobody is standing in the
direction of the spray.
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Fuel Injection Pressure
1. Set the injection nozzle to a nozzle tester.
2. Measure the injection pressure.
3. If the measurement is not within the factory specifications,
adjust with the adjusting washer inside the nozzle holder.
(Reference)
• Pressure change per 0.1 mm (0.004 in.) adjusting washer:
Approx. 980 kPa (10 kgf/cm
2
, 140 psi)
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Fuel Tightness of Nozzle Valve Seat
1. Apply a pressure 980 kPa (10 kgf/cm
2
, 140 psi) lower than the
fuel injection pressure.
2. After keeping the nozzle under this pressure for 10 seconds,
check to see if fuel leaks from the nozzle.
3. If fuel should leak, replace the nozzle piece.
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Nozzle Spraying Condition
1. Set the nozzle to a nozzle tester and check the nozzle spraying
condition.
2. If the spraying condition is defective, replace the nozzle piece.
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Fuel injection pressure Factory specification
13.73 to 14.70 MPa
140.0 to 150.0 kgf/cm
2
1992 to 2133 psi
Fuel tightness of nozzle
valve seat
Factory specification
12.75 to 13.72 MPa
130.0 to 140.0 kgf/cm
2
1849 to 1991 psi
(a) Good (b) Bad
KiSC issued 05, 2015 A