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4' king kutter finish mower. Replaced the belt 112 when I engage the belt pops off. Seems that the idler pulley is so close to the main drive pulley it binds and the belt pops off. Need a solution.

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  • King Kutter Master
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Either idler pulley bad or wrong belt installment

Posted on Aug 02, 2017

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: MTD Lawn Tractor: Constantly shredding deck belt...

I have the exact same model MTD tractor with same problem. It began when the bolt that extends through the idler arm assembly broke and subsequently damaged the pulley. Upon examination of the broken bolt, I found that the threaded end that extends below the deck is significantly smaller that the rest of the bolt. I got a larger bolt with the same size threads, bored out the hole through the deck and it made the whole idler assembly much stronger. the deck still has some vibration and some unusual belt harmonics, but it appears to be working. Compared to most other tractors of this size, this deck is very complicated.

Posted on Jun 15, 2009

  • 376 Answers

SOURCE: MTD Lawn Tractor problem

The front belt should be a 954-0280A, rear 954-0370. When you go to higher gears, the front belt should be getting tighter as the vari-speed pulley is moving further back. Remove the shift plate, put the transmission in neutral. Start the engine, put speed selector in highest gear and slowly let out on the clutch. You should be able to see what the problem is. It will do everything the same as if were in gear, except move. Make sure you have the correct belts.

Posted on Jun 28, 2009

  • 376 Answers

SOURCE: My Sears 917.272911 Lawn Tractor is eating mower drive belts

There's a couple of things that could be causing this. First, make sure the idler pulleys and blade pulleys spin freely. Second make sure the belt is behind the belt keepers on the two idler pulleys. There is only one on the left idler, but TWO on the right idler. I suspect that is your problem. Anyway, once the belt is on, engage the blades, with engine OFF, and inspect the belt routing, making sure it's not over or under something it shouldn't be.

Posted on Jul 02, 2009

mowerman1857
  • 389 Answers

SOURCE: I have a Craftsman 20 HP 42

Did you obtain the correct replacement belt AND pulley. Double check your part numbers against the parts list for your machine. If you verify that they are correct, double check the belt routing, make sure it didn't get on the wrong side of a belt guide and is in the correct configuration. Look at your idler pulley and make sure the release spring is doing its job pulling it back from the applied position. Make sure that the arm for the pulley moves freely where it is bolted to the deck, it could be bound up with rust or debris. You should have a lot of slack in the belt when it is in the released position. If it does not then either it is the wrong part or improper installation

Posted on Sep 17, 2009

mowerman1857
  • 389 Answers

SOURCE: The mower deck drive belt slipped off the idler

Get the model number off the tractor, go to:

www.murray.com

enter the model number and you will find a manual with pictures of how to route the belts along with a lot of other good information

Posted on Sep 30, 2009

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I need help putting rear end back together on a 10 hp30 Murray riding lawnmower


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.

Sep 28, 2016 | Murray Garden

1 Answer

I have a 52" Husqvarna LGT 2654 riding lawn mower and when I engage the blades, the belt does not turn the pulley system. What could be causing this, the pulley idlers, or the belt?


depending on the age of the machine, there could be several possibilities
1-- belts are not tight enough--- belt tension system is not correct, wrong length belts
2--bearings for the shafts for the blades are rusted up and seized - preventing the blades from moving--- switch the machine off , disengage the belt drive and see if you can turn the blades by hand
3--- if you have an electric pto system to drive the belts to the blades then that system is not getting full power to engage the PTO or the clutch is not working--worn facings
take it to a service dealer and have a proper diagnosis done

May 09, 2016 | Husqvarna Garden

1 Answer

I was mowing and then heard a loud pop like when you hit a stick and the mower stoped moving. it still runs and the blades will engage but it won't drive. any ideas??


Hi scott if you can shut the mower off and jack the mower up and look past the mower deck and see if yopu can see the drive belt it may have broken or jumped off an idler pulley. If it is the drive belt you will have to drop the deck to get toit. sometiomes a belt will roll itself and cause it to run off the pulley. good luck from ron.

Sep 21, 2013 | Husqvarna Garden

1 Answer

Mtd 42" riding mower rear drive belt keeps popping off pulley


Hi, check the idler pulley arm and return spring on that belt. Its most likely not pivoting freely allowing the belt to loosen when you operate the clutch, regards Phil.

Jun 10, 2012 | Mtd Garden

1 Answer

Craftsman mower keeps breaking primary mower belt


Have you check the tensioners? The idler pulleys that are on the arms with springs on them. My reasoning is, if the arms are rusted, or stuck for some reason and not moving freely then the springs can't pull the belt tight. If that's the case, I could see where the belt could be slipping more than it needs to and prematurely wearing out. Just something to check. Good luck.

Jul 29, 2010 | Craftsman Garden

1 Answer

What ingages blades ,blades not engage


On most riding mowers flipping the handle to engage the blade causes an idler pulley to engage the drive belt, which takes up the slack in the belt and pulls it against the drive pulleys. A few odd-balls have an electric clutch to engage the blades.

Jul 10, 2009 | Garden

1 Answer

My Sears 917.272911 Lawn Tractor is eating mower drive belts. The belt is being worn out in minutes on the flat idler pulley side. When I put the old belt back everything seems to work fine. The new belts...


There's a couple of things that could be causing this. First, make sure the idler pulleys and blade pulleys spin freely. Second make sure the belt is behind the belt keepers on the two idler pulleys. There is only one on the left idler, but TWO on the right idler. I suspect that is your problem. Anyway, once the belt is on, engage the blades, with engine OFF, and inspect the belt routing, making sure it's not over or under something it shouldn't be.

Jul 02, 2009 | Craftsman 20 hp 42 in. Deck Yard Tractor

2 Answers

Cable streched on swisher trailmower


Pull the belt cover off on the side of the engage lever and you will see that it is not a wire cable that engages the idler pulley. It's a rod connected to a long spring. Perhaps the spring came off or is defective as it puts tension on the idler pulley against the drive belt when you engage the blades. Further, there is a return spring to pull the idler pulley away from the drive belt when you disengage the blades. Check all the connections for the springs and see that the engage lever is mounted tightly. Also check the idler pulley itself.

Jun 22, 2009 | Swisher T14560 T - 60" Trailmower with 14...

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