Rocker Arm To Valve Clearance Adjustment - Toro AC-1 Service Manual

ENGINE ASSEMBLY
(cont.)
Rocker Arm to Valve Clearance Adjustment
Every 50 hours of operation, remove the rocker arm
cover and check the rocker arm to valve clearance.
1.
Position the crankshaft so that the piston is at the
top of the compression stroke (both rocker arms
are free and loose).
2. Measure the clearance between the valve stems
and rocker arms, using a flat feeler gauge
.
The recommended rocker arm to valve clearance fo
both the intake and exhaust is .003-.006 in(.076
mm-.152 mm).
3. If the clearance is not within specification, adjust
as follows:
a. Turn the adjusting nut, using a 5/16 in
(8 mm) wrench or nut driver.
To increase the rocker arm to valve
clearance, turn the adjusting nut
counterclockwise.
To decrease the rocker arm to valve
5
clearance, turn the adjusting nut clockwise.
b. Recheck the clearance with a flat feeler
gauge and readjust as necessary.
5. Reinstall the rocker arm cover, using a new
gasket. Torque the rocker arm cover screw to
20-30 in-lb (2.2-3.4 N-m).
I 3.6047.058
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