Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor

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What size bolt fits in the bottom of the crankshaft to hold up dbl, pully ? would that be a 7/16 -20 thread? crank size 1" if so,,what would the lenth of that be and the washer size and thickness???? Robert

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If this is a Craftsman riding mower. You can go to partsdirect.com; this is Sears website. Put your model number in and find the diagram along with
a parts list.

Posted on Oct 06, 2009

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1997 corolla crank pully bolt thread (left hand thread?)


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Not a stupid question. If thedampener is not tightened down sufficietly., The bolt can work itself out over tine.Without the clamping effect of the bolt the hub is able or will react to the crank shaft rotation pulses.which the dampener is supposed to absorb. Enough vibration,rotation counterin stress and eventually shears the keyin the crank and the dampener hub starts slipping on the crank . The rest is a given, the more it moves the more it loosens untilit no longer holds, Then you end up ssking this question. If you have lost a dampener, Just installing a new one will more than likely be futile.. The crank is now worn down and there will not be adequate sizing for the interference fit.. If you clean up the crank, and use loctite red on the pully and crank surfaces making sure the bolt is tightened real good with loctite thread lock on the threads, you mjust might get away with it. I can't see the dmage so you make the call. Now is you chance to replace the front crank seal. Is it in the shop now?

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But you will need someone to lock the crankshaft from turning, by putting a bar into the flywheel teeth. If there is no opening, you can make one by taking out the starter.

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How to remove bottom pully bolt 1.6 hdi 307


you need to peg the crankshaft near your gearbox. There is a hole in engine block for this purpose. Find this hole and insert an allen key (thick enough to fit in there). Turn the crank pully with ratchet in clockwise while try to find out the locking hole in crankshaft near gearbox by pushing allen key through engine block hole. You'll hear a click and the allen key goes fully inside. Now your crankshaft is locked and you can open (anticlockwise) the pully bolt.

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Is the bolt on the crankshaft pully right or left hand threads?


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They are usually in there pretty tight. If drivable, you can have someone loosen it up with a shop air gun.
Thread is not reverse.
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