Belt is slipping off pulley

Safety and Preparation Serious injury can occur if the engine or mower blades accidentally start while you are working with lawn tractors. To prevent this, drive the Murray lawn tractor onto a flat work surface and disengage the mowing deck cutting blades. Engage the parking brake to keep the mower from moving; chock the wheels with a wooden block or brick. Adjust the mowing deck to the lowest position. Turn off the engine and remove the key from the ignition. While not necessary, you may even wish to disconnect the spark plug wire from the spark plug. Mowing Deck Removal You must remove the mowing deck on a Murray lawn tractor to gain access to the belts. Remove the adjustment rod hairpins, followed by the adjustment rod pins from the front left and right sides of the mowing deck. At the rear on the left and right sides, pull out the retaining hairpins and slide the mowing deck suspension links from the adjuster plates to separate the rear mowing deck from the frame. Remove the blade control rod stud, including the hairpin and washer, from the top of the blade control lever shift linkage at the left rear of the deck. Remove the front hanger rod, including the hairpin and flat washer that hold the rod in place. Loosen the belt guide retaining bolts with a socket wrench and remove the engine stack pulley belt so you can slide the mower deck out from under the tractor Transmission Drive Belt Installation Slide the new transmission drive belt between the engine stack pulley belt guides, over the belt guide plate and under the engine stack pulley. Fit the transmission drive belt around the top engine stack pulley. Push the free end of the transmission drive belt up through the transmission shifter hole in the lawn tractor floorboard. Slip the transmission drive belt loop over the transmission shifter. Pull the transmission drive belt down through the transmission shifter hole. Fit the transmission drive belt around the transmission drive pulley and tighten the transmission drive pulley belt guide retaining bolts to hold it in place. Fit the transmission drive belt flat side around the idler pulley. Slide the idler pulley onto the idler pulley stud while holding the belt in place. Tighten the transmission idler pulley retaining nut with a socket wrench to secure the idler pulley to the idler pulley stud. Mowing Deck Drive Belt Installation Pull back on the right side mowing deck mandrel pulley spring-tensioned belt retainer. Guide the new mowing deck drive belt around the right side mandrel pulley and release the belt retainer. Pull the drive belt spring-tensioned retainer away from the mowing deck idler pulley, guiding the deck drive belt around the idler pulley. Fit the mowing deck drive belt around the left side mandrel pulley and under the rear mowing deck cross link rod between the right and left side mandrel pulley. Slide the mowing deck under the right side lawn tractor frame, reconnecting the deck to the frame in reverse order of removal. Engage and disengage the mower deck while driving the mower to test the belt for proper operation.

if you just replaced the bearings and now the belt is to loose tells me the belt wasn't put back on correctly. replacing the bearings don't have anything to do with the adjustment of the belt. double check to be sure is is on right Lisa. something isn't right. the tension should come from a spring loaded arm that when engaged it will apply a certain amount of pressure to turn the blades. if disengaged it will seam loose but that is ok. it has to be loose to let the belt slip on the pulleys.

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
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1. Step 1 - Loosen tension and remove belt. Locate the adjustment fastener and loosen it. ...
2. Step 2 - Inspect drive and drive pulleys. Check the drive and pulley wheels. ...
3. Step 3 - Select correct replacement belt. ...
4. Step 4 - Install V-belt. ...
5. Step 5 - Correctly tension new belt. ...
6. Step 6 - Start the engine.

There is probably a tensioner pulley with a handle on it to push it and allow enough slack in the belt to install it.

Is this a riding lawn tractor with a snow blower attachment? If so, I would inspect drive belt underneath unit to see if it slipped off and is locked up. If belts look ok, try pulling hydro release to see if you can push unit. If not your problem sounds internal.

I’m happy to assist further over the phone at https://www.6ya.com/expert/layne_0fccff498c319c32

Hi, My guess is that the drive belt slipped off the tranny or broke. Check and/or replace. Good luck.

steps:
1. elevate tractor.
2. lower blades all the way down.
3. remove battery and battery slot
4. place belt through battery slot around first pulley and then feed it through the middle two.
finally loosen the front pulley and slide new belt over the front of the last (front) pulley,

note: be sure to feed belt through all medal guides on the bottom of the tracoitr or else the belt will continue to fall off.

You can replace the drive belt, and make sure the springs on the tensioner and clutch pulleys are good, but the belt itself has no adjustment. They stretch a bit with age, also not uncommon for the transmissions to go bad which means slow or no movement even though the engine runs normally.

hi,

i would check with the owners manual to see if it shows an adjustment for the belt drive. most mowers today are equipped with a self adjusting arm witha pulley tensioner with a spring attatched to it. as the belt stretches the tensioner spring pulls against the arm causing it to apply tension to the belt thus tightening it. it sounds as if your belt is stretched beyond the limits of the tensioner. at least every new season it would be a good idea to inspect the belt tensioner for room or space of free play. that is to check to see if it will move opposite the pulley allowing the belt to tighten. if there is not enough sufficient room then i suggest replacement of the drive belt.