Retorque Head Bolts

After the first 50 hours of operation, you must retorque the head bolts to 4.0 kg.-m. (22 ft.-Ibs.)

IMPORTANT: If you feel uncomfortable about doing this procedure or you don't have the proper tools,

please take the unit to your nearest service center to retorque the head bolts. This is a very important step to insure the longest life for your engine.

NOTE: Only perform this adjustment after the first 50 hours of operation. The head bolts will need no further adjustment.

•Torque sequence is as follows: A, B, C, D, E (star pattern).

C

AB

D

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'thave the proper tools, please take the unit to your nearest 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 attaching 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.

•Using a 10mm wrench, loosen the rocker arm jam nut. Use an 8mm 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.

 

Feeler

Allen Wrench

Gauge

(_ Loosen

Jam Nut

When valve clearance is correct, hold the pivot ball stud in place with the allen wrench and tighten the rocker arm jam nut. Tighten the jam nut to

65-85 inch-pounds torque. After tightening the jam nut, recheck valve clearance to make sure it did not change.

Tighten Jam Nut to 65-85 inch-pounds

•Reattach the valve cover, making sure the gasket between the valve cover and cylinder head is in place. Start all four screws before tightening or you will not be able to get all the screws in place.

•Reattach the breather tube.

•Reattach the spark plug wire to the spark plug.

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Craftsman 580.327141 owner manual Retorque Head Bolts, Adjusting Valve Clearance, To adjust valve clearance
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580.327141 specifications

The Craftsman 580.327141 is a powerful, versatile lawn mower designed for homeowners who seek efficiency and ease of use in maintaining a pristine lawn. With a combination of advanced features and user-friendly technologies, the 580.327141 is built to perform admirably across various yard sizes and conditions.

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In conclusion, the Craftsman 580.327141 stands out as an excellent lawn mower choice for homeowners seeking a blend of power, convenience, and advanced technology. With its reliable engine, adjustable cutting heights, maneuverable design, and efficient grass collection system, it provides a superior mowing experience that caters to a wide range of lawn care needs.
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