wsm Kubota L4100, Workshop Manual

Page: 82 / 346

ENGINE L4100, WSM
1-S10
(EU)
(2) Valve Clearance
Valve Clearance
IMPORTANT
• Valve clearance must be checked and adjusted when
engine is cold.
1. Remove the head cover, the glow plugs and the timing window
cover on the clutch housing.
2. Align the " TC " mark line on the flywheel and center or timing
window so that the No.1 piston comes to the compression or
overlap top dead center.
3. Check the following valve clearance marked with "
,
" using a
feller gauge.
4. If the clearance is not within the factory specifications, adjust
with the adjusting screw.
5. Finally turn the flywheel 6.28 rad (360 °), and align the " TC "
marking line and the center of timing window. adjust all the other
valve clearance as required.
NOTE
• The "TC" marking line on the flywheel is just for No.1
cylinder. There is no "TC" marking for the other cylinders.
• No. 1 piston comes to the T.D.C. position when the "TC"
marking is aligned with center of timing window on
clutch-housing. Turn the flywheel 0.26 rad (15 °) clockwise
and counterclockwise to see if the piston is at the
compression top dead center or the overlap position. Now
referring to the table below, readjust the valve clearance.
(The piston is at the compression top dead center when
both the IN. and EX. valves do not move; it is at the overlap
position when both the valves move.)
9Y1210278ENS0005US0
Valve clearance Factory specification
0.18 to 0.22 mm
0.0071 to 0.0086 in.
Condition
No. of
cylinder
IN. Valve EX.Valve
When No. 1 piston is
compression top dead center
1st
, ,
2nd
,
3rd
,
4th
When No. 1 piston is overlap
position
1st
2nd
,
3rd
,
4th
, ,
(1) TC Mark Line
(2) Timing Window A: Valve Clearance
KiSC issued 08, 2012 A