Engine System
30
Service Manual – PBU Propane Floor Burnisher
No.2 Cylinder
• The left projection [A] on the flywheel is faced with the right leg
[B] on the #1 ignition coil [C] as shown in the figure.
• Check the intake and exhaust valves are closed completely, if
not, turn the flywheel one turn (360°) clockwise and face the left
projection with the right leg again.
Figure 30 Check Closing of Valves
•
Then check the valve clearance.
–
Using a thickness gauge [A], measure the
valve clearance between the rocker arm [B]
and the valve stem end.
If the valve clearance is incorrect, adjust it.
• Valve Clearance (when cold) Intake, Exhaust
0.10 ~ 0.15 mm (0.004 ~ 0.006 in.)
Figure 31 Check Valve Clearance
Valve Clearance Adjustment
•
Since valve repairs change the valve clearance,
adjust the valve clearance to the specification.
•
Turn the crankshaft in proper direction until the
piston is at the TDC of the compression stroke
(as described above).
• Loosen the locknut [A] and adjusting bolt [B].
• Insert a 0.05 mm (0.0020 in.) thickness gauge [C]
between the rocker arm and valve stem end, and
turn the adjusting bolt until the thickness gauge
begins to bind between the rocker arm and valve
stem end. Sweep the thickness gauge during this
adjustment.
• Valve Clearance (when cold) Intake, Exhaust:
0.10 ~ 0.15 mm (0.004 ~ 0.006 in.)
Figure 32 Thickness Gauge Between Rocker Arm and
Valve Stem End
