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I am having problems stripping the mandrel shafts and pulley, can any one tell me why, is this just a weak point or what?

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Are you saying the pulley on top of the blade spindle is stripping out? If it has done it once and you did not replace the pulley and shaft, it will happen again. The shaft and the pulley are splined and if they gets loose, it will strip the splines from both. In other words, you have to replace the pulley and the shaft for it to work...and tighten them securely. If that doesn't answer your question, let me know. Dwain

Posted on Jun 15, 2009


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Pulley blade assembly /how to get it appart to change barrings

You will need to remove the pulley from the deck and using a mallet carefully knock the shaft out. There is another way that does not involve disassembly of the mandrel/spindle, you can purchase another mandrel/spindle for replacement. For me, I always break the mandrel/spindle before the bearings go out anyway.

I hope that this gets you going soon.

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1 Answer

Replaced the mandrel on my Craftsman Model 917.273640 following the schematics on Parts Direct. When you put the pulley on the splines, there is too much play. It doesn't appear to tighten down as far as...

Yes a second washer would be acceptable as long as the splines on the shaft are at or slightly above the top of the pulley but it shouldn't be needed as long as the nut is torqued tight enough. Make sure the pulley is in good shape and the nut gets torqued down properly or the splines will tear up. There should have been a set of instructions with the new mandrel that gave the torque spec. Normally I just use a 1/2 inch drive craftsman air impact gun set to full power with about 100# air pressure. It is a rather large lock nut so it takes a lot of torque. Hope this helps. Please vote yes, thank you.

Nov 02, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Shaft problems

un hook l/h and r/h lift pins from both lift arms , remove front draft arm from front of deck ( it attaches under the muffler on the chassis )
discoonect the blade engage cable from arm if it uses this type or pop the deck belt off the electric pto if the tractor uses this type

you could just spin each spindle without the blade on ( but leave the top pulleys on ) if spindles bent you should see a wobble , if hard seeing it refit both blades and re-spin each spindle and check for quite a noticable variation in blade tracking when each blade is turned through a rev or two

remove deck , remove both mandrell pulleys from the top of thier shafts
remove both blades and use block of wood and knock the blade spindles out of their mandrells from the pulley side

here is website for parts

just click on 917 the select 288280 from the list
it should show parts breakdown

cheers hope it helps

any problems let me know


Aug 01, 2010 | Craftsman Professional 24 hp 42" Yard...

1 Answer

How can I un-bolt the Mandrel Pulley from the shaft?

If you have the deck removed from under the tractor you can try putting the blade back on tight if you have removed it and then use the blade to keep the mandrel shaft from turning. It takes quite a bit of torque to break the nut loose on the pulley so a socket and ratchet or breaker bar is the best thing to use. Other than that there is no "special" tool required

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1 Answer

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try tapping with a hammer and using small pipe wrench or vise grips, last resort heat up with torch then use pipe wrench or vise grips.

Sep 07, 2009 | Craftsman 26 hp 54 in. Deck Deluxe Yard...

3 Answers

Mandrel chews pulley

Are you sure the spindle is not bent and also are you balancing the blades when sharpening. Other then that make sure bolts are tight on the mandrel. With the deck off and standing up spin the blades and watch center of balde to see if something is bent. Also watch pulley on the other side to see if its bent.

Jul 19, 2009 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

2 Answers

I had to get a new mandrel housing which goes

You have to remove the nut on top of the pulley. With the pulley off, the shaft will slide out the bottom with the blade. Don't forget when you put the pulley back on, the washer/spacer goes BETWEEN the pully and housing, NOT on top of the pulley. Dwain

Jun 08, 2009 | Craftsman 26 hp 54 in. Deck Deluxe Yard...

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