Fuel System - Kubota EA330-E4 Series Workshop Manual

EA330-E4, WSM

(4) Fuel System

Replacing Injection Pump
1. Remove the injection pump.
2. Remove the tamper proof cap and then remove the fuel limiter.
3. Mount a new injection pump and adjust the injection timing and
the fuel limit position.
A: <How to Adjust the Injection Timing>
1. Mount the injection pump as indicated in the picture.
2. Set the speed adjustment lever to the max revolutions position.
3. Turn the crankshaft using a start handle and make sure fuel is
discharged from the tip of the injection pipe.
4. Turn the flywheel in the counter clockwise direction until the line
mark (timing angle lines (1)) on the outer circumference of the
flywheel nears the fan cover mark (2).
5. From this position, slowly continue to rotate the flywheel in the
counter clockwise direction and stop rotation of the flywheel
when the fuel level at the tip of the injection pipe starts to rise
and check the angle indicated by the fan cover mark (2) at this
point.
6. If injection timing is off, adjust using shims (3) on the mounting
surface of the injection pump.
B: <How to Adjust the Fuel Limit Position>
1. After adjusting injection timing, remove the new injection pump.
2. Reset the fuel limiter using a prescribed jig (Pitak-Q). Refer to
Pitak-Q Workshop Manual (Code No. 9Y120-00110). (Match
the number of shims (3) for after adjusting the injection timing
when mounting the jig.)
3. Mount the new injection pump.
NOTE
• Even if not replacing the injection pump, when checking
the injection timing, first release the fuel limiter and then
readjust the fuel limiter using the procedure indicated in B
above <How to Adjust the Fuel Limit Position>.
Injection timing (static) Factory specification
(Reference)
• If injection timing is advanced → increase the number of shims.
• If injection timing is retarded → decrease the number of shims.
NOTE
• The crank angle changes approximately 1.5 ° for one
0.15 mm shim.
(1) Timing Angle lines
(2) Fan Cover Mark
Pump Element Fuel Tightness
1. Remove the injection pipe.
2. Install an injection pump pressure tester to the injection pump.
3. Set the speed control lever to the maximum speed position.
4. Turn the flywheel counterclockwise ten times or more.
5. If the pressure can not reach the allowable limit, replace the
injection pump assembly.
Pump element fuel
Allowable limit
tightness
1-S19
ENGINE
0.4320 to 0.4581 rad
(24.75 to 26.25 °) before
T.D.C.
(3) Shim
9Y1211018ENS0014US0
13.73 MPa
2
140.0 kgf/cm
1991 psi
9Y1211018ENS0015US0
KiSC issued 05, 2015 A