Kubota M105S, Workshop Manual

Page: 134 / 561

1-S17
M105S, WSM ENGINE
(4) Fuel System
Injection Timing
1. Make sure of matching the injection timing align mark (1) of the
injection pump unit and the plate (gearcase), as shown in the
illustration.
2. Remove the injection pipes.
3. Remove the stop solenoid.
4. Turn the flywheel counterclockwise (viewed from flywheel side)
until the fuel fills up to the hole of the delivery valve holder (2) for
No.1 cylinder.
5. After the fuel fills up to the hole of the delivery valve holder for
No.1 cylinder, turn back (clockwise) the flywheel around 1.57 rad
(90 °).
6. Turn the flywheel counterclockwise to set at around 1.35 rad (20
°) before T.D.C..
7. Slowly turn the flywheel counterclockwise and stop turning when
the fuel begins to come up, to get the present injection timing.
8. Check to see the degree on flywheel.
The flywheel has mark “1TC”, “10” and “20” for the crank angle
before the top dead center of No. 1 piston.
9. If the injection timing is not within the specification, rotate the
injection pump unit to adjust the injection timing.
IMPORTANT
■
• When installing the injection pump unit to the engine body,
follow the correct procedure.
See the “Injection Pump Unit”.
W1028613
Injection Pump Test
1. Remove the injection pump unit.
(Refer to “Injection Pump Unit”. (See page 1-S33 to 36.)
2. Check the injection pump on the test beach in Denso Service
shop.
W1029716
Injection timing Factory spec.
0.12 to 0.16 rad (7 ° to 9 °)
before T.D.C.
Tightening torque
Injection pipe retaining nut
19.6 to 24.5 N·m
2.0 to 2.5 kgf·m
14.5 to 18.1 ft-lbs
Injection pump unit
mounting nut
17.7 to 20.6 N·m
1.8 to 2.1 kgf·m
13.0 to 15.2 ft-lbs
(1) Injection Timing Align Mark
(2) Delivery Valve Holder (a) Injection Timing Advanced
(b) Injection Timing Delayed
KiSC issued 03, 2007 A