Kubota B1830, Workshop Manual

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GENERAL B1830,B2230,B2530,B3030, WSM
G-38
[8] CHECK POINT OF EVERY 800 HOURS
Valve Clearance 1 (ROPS Model)
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 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.
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 line is aligned with center of timing window on
front case. 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.
: Valve clearance is adjustable.
9Y1210003GEG0041US0
Valve clearance Factory specification
0.145 to 0.185 mm
0.0057 to 0.0073 in.
Adjustable cylinder
location of piston
Number of cylinders Valve arrangement
3-cylinder 4-cylinder
IN. EX. IN. EX.
When No. 1 piston
comes to
compression top
dead center
No. 1
No. 2
No. 3
No. 4
When No. 1 piston
comes to overlap
position
No. 1
No. 2
No. 3
No. 4
(1) Timing Window
(2) TC Mark Line A: Valve Clearance
KiSC issued 05, 2012 A