Craftsman 580.327160 El Manual Del Propietario página 15

Adjusting Valve Clearance
After the first 50 hours of operation, you should adjust
the valve clearance in the engine.
IMPORTANT: If you feel uncomfortable about doing
this procedure or you don't have the proper tools,
please take your generator in to the nearest Sears
service center to have the valve clearance adjusted.
This is a very important step to insure the longest life
for your engine.
To adjust valve clearance:
• Make sure the engine is at room temperature.
• Make sure that the spark plug wire is removed from
the spark plug and out of the way.
• Remove the breather tube from the valve cover.
• Remove the four screws holding the valve cover
with a #2 or #3 phillips screwdriver.
• Make sure the piston is at Top Dead Center (TDC)
of its compression stroke (both valves closed). To
get the piston at TDC, pull on the recoil handle
slowly watching the piston through the spark plug
hole. As you pull on the recoil handle, the piston
should move up and down. The piston is at TDC
when it is up as high as it can go.
• Loosen the rocker arm jam nut. Use an 8 mm allen
wrench to turn the pivot ball stud while checking
clearance between the rocker arm and the valve
stem with a feeler gauge. Correct clearance is
0.002-0.004 inch (0.05-0.1 mm).
NOTE: You must hold the rocker arm jam nut in place
as you turn the pivot ball stud.
When valve clearance is correct, hold the pivot ball
stud in place with the allen wrench and tighten the
rocker arm jam nut to 165-183 inch-pounds torque.
After tightening the jam nut, recheck valve
clearance to make sure it did not change.
\
tighten Jam Nut to
165 to 183 inch-pounds
(19-21 N-m)
• Reattach the valve cover.
NOTE: Start all four screws before tightening or you
will not be able to get all the screws in place.
NOTE: Make sure the gasket between the valve cover
and cylinder head is in place.
• Reattach the breather tube.
• Reattach the spark plug wire to the spark plug.
Allen Wrench
Feeler
Gauge
0 Loosen
Jam Nut
15