Sears electric clutch replacement

skywatcher12March 22, 2011

I need to replace my electric clutch part number 179335 and I need to find out the torque for the bolt. The sears manual only lists the bolt as part number 85 and sears won't tell me the torque. They want to send someone out to replace the clutch. Does anyone have this information.

Thank you

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I recently removed and reinstalled the electric clutch on my Craftsman GT5000, while doing some other repairs. I looked through all the Briggs & Stratton torque specfications. They specify virtually every fastener on the engine EXCEPT for the crankshaft PTO bolt. Mine is a 7/16 bolt with fine threads.

For your request I, again, searched every Briggs document I have and found no specs for that torque.

So, you might want to do what I did. I figured that the only mistake I could make was to torque it too much and break the bolt! So, I tightened the bolt to about 80 Ft-lbs, rememberimg that the rotation of the engine will tend to tighten the bolt more, so there is probably no risk of the bolt backing out by itself.

    Bookmark   March 22, 2011 at 7:27PM
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might try this SAE torque table - if nothing else

Here is a link that might be useful: torque table

    Bookmark   March 22, 2011 at 7:38PM
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Nice torque table. I have that link salted away for future reference....

BTW, I think the bolt on the PTO to crankshaft is a 'Grade 8' 7/16 ....78 ft-lbs.....

    Bookmark   March 22, 2011 at 8:20PM
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My engine is a Kohler Model CV730-0017. Would the torque be the same from the Briggs & Stratton you mention?

Thank you.

    Bookmark   March 23, 2011 at 10:46AM
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To clarify (or add to the confusion) click the link to a recent post.

Here is a link that might be useful: Warner sez

    Bookmark   March 23, 2011 at 11:08AM
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skywatcher - measure the shaft diameter of the clutch retaining capscrew with a vernier caliper. .437 inches = 7/16; .375 inches = 3/8; .500 = 1/2 inch..... etc.
then look at the capscrew's head top surface: if no diagonal raised boss strips, gtade 2; if 3 diagonal raised boss strips, grade 5; if 5 diagonal raised boss strips, grade 8.

select appropriate torque value from table. Apply never-seize or equivalent to assy before torquing to facilitate future disassembly.

good luck

    Bookmark   March 23, 2011 at 2:01PM
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