Fuel System - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

(4) Fuel System

CAUTION
• Check the injection pressure and condition after confirming that there is nobody standing in the direction
the fume goes. If the fume from the nozzle directly contacts the human body, cells may be destroyed and
blood poisoning may be caused.
Injection Timing
1. Remove the injection pipes and timing window (7) cover.
2. Set the speed control lever to the maximum fuel discharge
position.
3. Turn the flywheel counterclockwise (facing the flywheel) until
fuel flows from the delivery valve holder.
4. Continue to turn the flywheel slowly, and stop it as soon as the
fuel level at the tip of the delivery valve holder begins to
increase.
5. Check to see if the timing angle lines on the flywheel is aligned
with the alignment mark (2).
6. If the injection timing is out of adjustment, readjust the timing
with the injection pump shims (3).
[Z482, D722]
Injection timing Factory specification
[D782]
Injection timing Factory specification
NOTE
• The liquid gasket is not required for assembling.
• Shims are available in thickness of 0.20 mm (0.0079 in.),
0.25 mm (0.0098 in.), 0.30 mm (0.012 in.), 0.35 mm (0.014 in.)
and 0.175 mm (0.00689 in.). Combine these shims for
adjustments.
• Addition or reduction of shim (0.025 mm, 0.00098 in.)
delays or advances the injection timing by approx.
0.0044 rad (0.25 °).
• In disassembling and replacing the injection pump, be sure
to use the same number of new shims with the same
thickness.
• The 0.175 mm (0.00689 in.) thick shim is coated only on the
lower face. Therefore, do not use the 0.175 mm (0.00689 in.)
thick shim as the top shim of the combination (injection
pump side), because this can cause oil leakage.
• Refer to figure of the shim to check the thickness of the
shims.
• The injection timing might be changed by the application.
(Reference)
• The alignment mark (2) of the injection timing line (1) is not in
alignment with the center of the timing window (7).
• The above mark (2) comes aligned with the center of the clutch
housing rib (8).
(1) Timing Line
(2) Alignment Mark
(3) Injection Pump Shim
(Soft Metal Gasket Shim)
(4) Shim with two Holes : 0.175 mm
(0.00689 in.)
(5) Shim with one Hole : 0.25 mm
(0.0098 in.)
1-S15
ENGINE
9Y1210272ENS0021US0
0.30 to 0.33 rad
(17 to 19 °) before T.D.C.
0.28 to 0.31 rad
(16 to 18 °) before T.D.C.
(6) Shim without Hole : 0.30 mm
(0.012 in.)
(7) Shim with three Holes : 0.35 mm
(0.014 in.)
(8) Timing Window
(9) Rib
9Y1210272ENS0097US0
KiSC issued 07, 2011 A
(EU)