Question about Craftsman 20 hp 42 in. Deck Yard Tractor

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How do you adjust the pulleys on a 42" 20 HP craftsman tractor mower. The belt burned off and when I replaced it with a new one the new one began to shred

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There is no adjustment on these pulleys. Sounds like the belt was over the blade pulley brake arms or idler pulley guide. They will shred a belt in nothing flat.

Posted on Oct 23, 2010

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Yth2248 loses speed on slightest grade. new drive belt not helpful


Roy if it is the correct belt and fairly new, check your manual for belt adjustment, if it shows that there is no adjustment the pulleys may be worn out, on a lot of mowers the pulleys are ware items and changed more often to correct slipping issues. The other thing to check is the belt tensioner if equipped, it could be seized, weak or missing spring or it may even be adjustable by cable end being threaded or slotted bolt holes on tensioner arm.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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1 Answer

What do I do to fix a loose mower belt on a craftsman zero-turn mower


Your belt has stretched. If there is an adjuster available, via pulley, use it till there is no more adjustment. Otherwise, remove the belt and replace with a new, proper size belt.

Sep 08, 2015 | Craftsman Garden

1 Answer

New drive belt immediately burned up after replacement


Make sure blades move ok. Check bad spindle bearings too

Oct 22, 2012 | Craftsman 20 Hp 42" Deck Lawn Tractor

1 Answer

Install mower belt


Lift the front of the tractor about 3 feet off the ground& remove the right side rear mower hanger to give you clearance to do the job. Make sure you get the belt on the pulleys and not rubbing a blade brake arm or an idler pulley keeper or the new belt will burn off in about 10 minutes.

Oct 24, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

HOW TO ADJUST THE CUTTING BLADE TENSION OF THE MOWER BELT.


There is no adjustment on the Craftsman mower belt tension. The tension is maintained by a spring. If the belt is to loose you either have the wrong belt or something is broken like a mandrel housing that holds the fixed pulleys in place.

Oct 10, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

I have a 42 inch 18.5 hp craftsman riding mower that has started jerking when in a pull .The belt is very loose and has never been changed. could this be the problem.Also can you ck trans fluid on this...


look under unit and check the pulleys may need an adjustment on the engagement pulley which is connected to the foot brake pedal if adjustment good than also check rear pulley unbolt rear cover to access sometimes bolt becomes loose if good and belt is damaged or stretched than replace belt

Aug 15, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

19.5 hp 42 " automatic craftsman . The trans seems to be slipping,does not want to go up any incline. I have purged it and installed a new drive belt. did not help.


recheck ur drive belt either wrong belt or spring/idler/tentioner pulley needs attention adjustment replacement also check free wheel actuator that not partially activated

Jun 10, 2010 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

2 Answers

Tractor belt slips so blade doesn't cut


There is an electrical clutch that drives the belts. This clutch may be worn. Some will have adjustments that will allow it to tighten them up and not slip. Now when your tractor is running and you turn on your blades there is power sent to this clutch, it is mounted on the engine shaft and has flexible metal plate that is pulled into a pulley buy an electro magnet this plate is worn or could be full of grass/dirt. You need a good strong light, with the tractor OFF, get under and look at this clutch, look for grass/dirt or if the metal has changed colors meaning it has gotten very hot. If it has gotten very hot it is time for a new clutch... Sorry if this is the case. Good hunting.

May 22, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

Sears Craftsman riding mower V belt getting chewed


I believe you may have the belt over one or more of the belt retainers next to the pulleys. They are 5 or 6 inches long and about a 1/4 inch in diameter. You have to loosen them when you put the belt on then adjust them to where they are just barely touching the back of the belt. They keep the belt from jumping off.

May 01, 2010 | Craftsman 20 Hp 42" Deck Lawn Tractor

1 Answer

BELT ADJUSTMENT


There is an idler pulley near the drive pulley under the engine. It is made of plastic and is a common failure. It freezes up and doesn't want to let the belt move. Have you noticed the smell of hot/burning plastic? You can replace it with an original, but it is still plastic. Metal replacements can be had. I think I got some from mcmaster.com so try there. They are a great resource. Shipping is fast and inexpensive and they have everything a guy could want.

May 28, 2009 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

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