Kubota M5640SU Workshop Manual page 100

M5640SU, M5640DT-SU, WSM
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 "1TC" mark line on the flywheel and center of 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
feeler gauge.
4. If the clearance is not within the factory specifications, adjust
with the adjusting screw.
Valve clearance Factory spec.
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.)
• 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.
• After turning the flywheel counterclockwise twice or three
times, recheck the valve clearance, firmly tighten the lock
nut of the adjusting screw.
Condition
1st
When No. 1 piston is
2nd
at compression top
3rd
dead center
4th
1st
2nd
When No. 1 piston is
at overlap position
3rd
4th
(1) TC Mark Line
(2) Timing Window
1-S12
ENGINE
0.18 to 0.22 mm
0.0071 to 0.0086 in.
Number of cylinder
IN. Valve EX. Valve
A : Valve Clearance
9Y1210365ENS0005US0
KiSC issued 07, 2009 A