Fuel System - Kubota MX5100 Workshop Manual

MX5100, WSM

(4) Fuel System

Injection Timing
1. Remove the stop solenoid.
2. Remove the injection pipes and nozzle.
3. Set the speed control lever to maximum fuel discharge position.
(Reference)
• Turn the flywheel with screwdriver.
4. Turn the flywheel counterclockwise (facing the flywheel) until the
fuel fills up to the hole of the delivery valve holder for 1st cylinder.
5. Turn the flywheel further and stop turning when the fuel begins to
flow over, to get the present injection timing.
6. (The flywheel has mark 1TC and four lines indicating every 0.09
rad (5 °) of crank angle from 0.17 rad (10 °) to 0.44 rad (25 °)
before mark 1TC) Calculate the angle which the center of the
window points out.
injection timing, add or remove the shim to adjust.
(Injection Timing)
Model
V2403-M-T 0.132 to 0.157 rad (7.55 to 9.05 °) before T.D.C.
NOTE
• The sealant is applied to both sides of the soft metal gasket
shim. The liquid gasket is not required for assembling.
• Shims are available in thickness of 0.175 mm (6), 0.20 mm
(3), 0.25 mm (4) and 0.30 mm (5). Combine these shims for
adjustments.
• The 0.175 mm thick shim is coated only on the lower face.
Therefore, do not use the 0.175 mm thick shim as the top
shim of the combination (injection pump side), because this
cause oil leakage.
• Addition or reduction of shim (0.05 mm, 0.002 in.) delays or
advances the injection timing by approx. 0.009 rad (0.5 °).
• In disassembling and replacing, be sure to use the same
number of new gasket shims with the same thickness.
(1) Delivery Valve Holder
(2) Timing Mark
(3) 2-Holes: 0.20 mm (Shim)
(4) 1-Hole: 0.25 mm (Shim)
(5) Without hole: 0.30 mm (Shim)
(6) 2-Holes: 0.175 mm (Shim)
1-S19
If the calculation differs from specified
Injection timing
(A) 4 Cylinder
ENGINE
W1036402