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On a Simplicity Regent 15 , 38" lawn tractor. I blew the left side mandrel bearings. I noticed that when I hand spin the pulley clutch from the engine, there is a slight grinding sound,

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  • Garden Master
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Pulley running on housing or faulty bearings
if one housing bearing failed , good chance that the other side will not be far behind

Posted on Apr 27, 2017

Testimonial: "Thank you. I will replace the other. It is normal to hear a slight grind drag on the main clutch pulley that belts to the mantrels?"

  • Bill Boyd Apr 27, 2017

    I would be suspicious of any grinding noise as spinning units should be noise free

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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.

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Tip

Replacing Riding Lawnmower Blade Belts.


I discovered on a Craftman Riding 3 bladed mower that there is an easy way to replace the belt for the blade pulleys.

The mandrel cover of the Left side blade is the only part you need to remove to replace the belt. You can insert the belt under the right side mandrel cover and onto the clutch pulley before finishing on the left side of the mower.

The tensioner or idler pulleys will contract when you pull on the belt. When you get to the left blade pulley you can turn the pulley with one hand and guide the belt with the other hand. The belt will walk right up onto the pulley. Attach the cover and you're done.

I like my method because you can stay away from a hot engine and replace the belt without waiting for the motor to cool off. You are also not fighting the mower clutch or drivebelt with my method.

on Dec 16, 2010 | Garden

1 Answer

How do I tighten my drive belt on my simplicity lawn tractor because it keeps slipping off when I make left turns?


Check air pressure in your tires, and if you look around your deck pulleys you may find 1/4" adjustment bars that you can loosen and move in towards your pulleys. These bars, if you have them there, keep the belt from falling off. But my first suggestion should help you. GOOD LUCK FRIEND.

Sep 21, 2014 | Simplicity 38in Regent 21hp Briggs

2 Answers

I replaed the blade drive mandrel and reattacheed the blade and the blade does not freelyturn t is so bound up tht I cannot turnit manually


okay check see if brakes is on the mower, not the tractor but the blades of the mower deck if not then take belt off of the new mandrel side and try turning blade by hand. should turn freely if not mandrel is bad but unlikely. sounds like you changed wrong side mandrel I presume you have 2 blades and mandrels. or when you installed it back on. the belt may be bound up between a guide and pulley just kind of look things over before a tear apart. and then do your tear apart one step at a time then check blade to see if it turns does not seem serious you may have put belt on wrong, I have done it my self. hope this helps major note do not do this with engine running cut you hand off in a flash.

Aug 13, 2014 | Husqvarna Riding Lawn Mower 46 Cut Kohler...

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How do you change the arbor bearings on an simplicity regent with a 50 inch cut?


You must take the blades and belt off and the well as pulley, the arbor is replaced as a unit and it unbolts with several bolts.

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1 Answer

L115 42'' deck drive belt breaks after only


Possible spindle bearing. ( mandrel bearings )
Spin blades by hand with deck belt disconnected and mower turned off of course. Listen for grinding noise. If so, Replace mandrels and bearings fully. I would replace all few pulleys.
Not too bad price from the right small engine repair shop such as places like Pats Small Engine in Minnesota. ( which pwns)

Jun 13, 2013 | Garden

1 Answer

Craftsman 42 in. deck lawn tractor. Will start and idle fine but when you let out on the clutch the motor bogs down and dies


few reasons will try to narrow down first start it and put in neutral and deck disengaged release clutch if bogs then fuel problem the carb may need adjustment or repair or fuel filter needs replacement----if no bog step on clutch no put in gear release clutch if bogs check drive belt -upper belt on engine pulley and check for binding an idler pulley problem -debris -or rear unit binding -needs service-drive pulley damaged-rear locked--if not bogging in gear step on clutch engage deck release clutch if bogs need to check deck -belts-pulleys -mandrels -bearings and for bent or binding blades good luck

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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

Sep 26, 2009 | Husqvarna Lawn Tractor 48" Deck, 23 Hp,...

1 Answer

MY husqvarna yth2148 left side deck mandrel and pulley failed. I bought a new mandrel and pulley and installed same. Mowed the lawn twice and it failed again. any suggestions


Did it break or overheat? There is a small spacer washer that goes under the pulley between the pulley and bearing, if that washer was missing or got ground up on the first one and you didn't notice it the next pulley would rub hard against the top of the mandrel and fail.

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