Kubota EA330-E4 Series - Page 85

ENGINE
EA330-E4, WSM
1-S20
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).)
9Y1211018ENS0016US0
Delivery valve fuel
tightness
Factory specification
10 seconds or more
13.73 → 12.75 MPa
140.0 → 130.0 kgf/cm
2
1991 → 1849 psi
Allowable limit
5 seconds
13.73 → 12.75 MPa
140.0 → 130.0 kgf/cm
2
1991 → 1849 psi
(1) Fan Cover Mark
(2) Timing Line
(a) 1.6 rad (90 °)
KiSC issued 05, 2015 A