Kubota EA330-E4 Series Workshop Manual page 85

EA330-E4, WSM
Delivery Valve Fuel Tightness
1. Remove the injection pipe.
2. Set an injection pump pressure tester to the injection pump.
3. In the same way as to check the pump element fuel tightness,
turn the flywheel counterclockwise ten times or more so that the
pressure is increased to specified pressure (Refer to the table).
4. Set the plunger at the bottom dead center to reduce the delivery
chamber pressure to zero.
5. Measure the fall time for the pressure to drop to the reference
pressure from the specified initial pressure.
6. If the measurement is less than the allowable limit, replace the
injection pump assembly.
(Reference)
• How to set the plunger to the bottom dead center.
Turn the flywheel to clockwise 1.6 rad (90 °) from the injection
timing position. (Align the injection timing line (2) on the flywheel
with the fan cover mark (1).)
Factory specification
Delivery valve fuel
tightness
Allowable limit
(1) Fan Cover Mark
(2) Timing Line
1-S20
ENGINE
10 seconds or more
13.73 → 12.75 MPa
140.0 → 130.0 kgf/cm
1991 → 1849 psi
5 seconds
13.73 → 12.75 MPa
140.0 → 130.0 kgf/cm
1991 → 1849 psi
(a) 1.6 rad (90 °)
9Y1211018ENS0016US0
KiSC issued 05, 2015 A
2
2