Check Of Valve Clearance - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
Checking Valve Clearance
IMPORTANT
• Valve clearance must be checked and adjusted when
engine is cold.
1. Remove the high pressure pipes and the head cover.
2. Align the 1TC mark of flywheel and the convex of flywheel
housing timing windows so that the first piston (gear case side)
comes to the compression top dead center.
3. Before adjusting the valve clearance, adjust the bridge evenly to
the valve stem.
4. Loosen the lock nut (2) and adjust with screw (1).
5. Slightly push the rocker arm by your fingers and screw in the
adjusting screw slowly until you feel the screw touch the top of
valve stem, then tighten the lock nut.
6. Loosen the lock nut (4) of adjusting screw (3) (push rod side) and
insert the thickness gauge between the rocker arm and the
bridge head. Set the adjusting screw to the specified value, then
tighten the lock nut.
Valve clearance Factory spec.
Note
• After adjusting, tighten the lock nut (4) securely.
Valve arrangement
Adjustment cylinder
Location of piston
When No.1 piston is at
compression top dead center
When No.1 piston is at
overlap position
Cylinder head cover screw
Tightening torque
Injection pipe retaining nut
(1) Adjusting Screw
(2) Lock Nut
III-S-104
0.23 to 0.27 mm
0.0091 to 0.0106 in.
IN.
1st *
2nd *
3rd
4th
1st
2nd
3rd *
4th *
6.9 to 11.3 N·m
0.7 to 1.15 kgf·m
5.1 to 8.32 ft-lbs
19.6 to 24.5 N·m
2.0 to 2.5 kgf·m
14.5 to 18.1 ft-lbs
(3) Adjusting Screw
(4) Lock Nut
Engine
EX
*
*
*
*
W1047000