Why does the belt keep coming off my riding mower

The drive belt may come off a riding mower because it is damaged or loose. … If broken or worn, the belt can break while the engine runs, and it can fly off at a great velocity, which is highly dangerous. Check the belt for looseness, cracks, fraying or separation from the rest of the assembly, and replace if necessary.

How do I know if my lawn mower pulley is bad?

If a pulley is badly worn, it can cause a bad vibration from the cutting deck on your lawn tractor. To check all your pulleys, start by removing the mower deck. Next, remove the mandrel covers and belt, then check all the pulleys for play and roughness when spinning.

How do you adjust a tensioner pulley?

Turn the adjustment bolt on the side, top or bottom of the pulley counterclockwise with the ratchet and socket until the accessory belt is loose enough to remove. Tighten the tensioner pulley by turning the adjustment bolt clockwise with the ratchet and socket until the belt is tight.

Why does the belt on my Cub Cadet keep coming off?

Your Cub Cadet mower deck belt keeps coming off because the belt is worn and stretched; the belt keepers or brackets are damaged; the bearing is damaged in a pulley or spindle housing; debris is interfering with your belt tension; or oil has collected on the belt.

Can a mower belt stretch?

Yes, lawnmower belts can stretch. Continuous wear due to regular operation can cause them to elongate over time. When it stretches more than it should, it can result in the drive belts lose grip on the pulley system.

What are the signs of a bad belt tensioner?

One of the most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.

How long should a mower drive belt last?

Good mower belts should last for about 3- 4 years. If you don’t have a quality mower belt, you need to get one to use it for this long.

Is a tensioner pulley the same as an idler pulley?

The primary distinction between tensioners and idler pulleys is the presence of an adjustable bolt. Tensioners are positioned on the bolt through mounting. Idler pulleys are not mounted to an adjustable bolt. … However, if bearings fail, tensioner and idler pulleys both require replacement.

What are the signs of a bad serpentine belt?

  • No Air Conditioning.
  • Squealing Sounds.
  • No Power Steering.
  • Overheated Engine.
  • Visible Cracks on Belt.
  • Dead Battery.
  • Pulley Whine.
How do you tighten the belt on a Cub Cadet mower?

Turn the ratchet toward the right side of the mower to loosen the belt tension on a 46-inch deck. If your Cub Cadet lawn tractor has a 50-inch deck, set the 3/8-inch drive ratchet to tighten, and insert it into the square hole on the idler bracket. Turn it toward the right side of the mower to loosen the belt tension.

Article first time published on askingthelot.com/why-does-the-belt-keep-coming-off-my-riding-mower/

What does a belt keeper Rod do?

Description: The belt keeper rod goes next to the engine pulley and helps to guide the belt. This part is available as an individual replacement. It is made out of metal and may require a socket set and a wrench set while replacing this item.

Can you adjust belt tensioner?

Proper operation of the drive belt is important in maintenance of the vehicle. … Cars equipped with an automatic belt tensioner adjust themselves over time and do not require adjustment. This article shows you the process to adjust drive belts on a pivot-style belt adjuster.

How do you tighten a belt tensioner?

Locate the adjuster bolt on the belt tensioner used to secure the serpentine belt, and adjust the tension by loosening or tightening the adjuster bolt with a racthet and socket while you simultaneously move the belt back and forth gently to find the proper tension.

Can you over tighten a belt tensioner?

Over-tightened belts can cause internal damage to the bearings inside the pulleys. It can also cause overheating of the belts and premature wear. Put the vehicle back together by replacing the components required to access the belt tensioners. To test, operate the vehicle for several minutes and shut it off.

Do you have to remove mower deck to replace belt?

To replace this belt, the deck should be off the lawn mower. … To remove the front of the belt from the engine pulley, you may have to remove the cap screw from the center of the pulley and PTO to the engine crankshaft.

Is a lawn mower belt supposed to be loose?

The belt of your lawn mower should be tight in order for it to work properly. … The belt is used to transfer power from the engine to the wheels and when the belt is not tight, the mower will not move forward or backward as it should.

Can a lawnmower belt shrink?

Belts don’t shrink!

Will pushing a self propelled mower damage it?

You can push a self-propelled lawnmower, it won’t damage the transmission in any way. However, it may be difficult to do so, self propelled mowers are a little heavier than a regular push mower. … Pushing a self-propelled mower is tough work, especially on a hot day.

How do you tighten the belt on a Troy Bilt self propelled lawn mower?

Insert an Allen wrench into the square hold of the belt tensioner. Turn the wrench clockwise to tighten the belt tension.

How do you adjust the belt tension on a Craftsman riding lawn mower?

Push the belt keepers on the transaxle pulley down and slide the belt over the transaxle pulley. Pull the slack from the back of the tractor (transaxle pulley) and slide the belt on to the stationary and clutch idlers. This will increase the tension in the belt and hold it in place.

What causes deck belt to stretch?

A pulley rides on bearings that allows it to spin freely. When a pulley doesn’t spin freely, friction is created between the pulley and belt, causing the belt to break.

How do you tension a belt?

Belt tension is measured by plucking the belt span while holding a sensor close by. Belt tension is adjusted until the belt span frequency, or measured tension level is within manufacturer’s recommendations.

What does the drive belt do on a riding mower?

The ground drive belt connects the engine crankshaft to the transaxle pulley to drive the rear wheels. If the belt breaks, the lawn tractor won’t move. If the belt is worn, the lawn tractor moves sluggishly because the belt slips on the pulley.

How many belts does a riding lawn mower have?

There are two belts on most riding lawnmowers. One belt connects the transmission of the lawn tractor to the driveshaft pulley and the other belt connects the mower deck to the driveshaft pulley.

What is a secondary mower belt?

This is the the belt that is attached to the transmission pulley helping to drive the unit. … Over time belts tend to wear out and stretch eventually requiring replacement. Inspect belts periodically and replace them as needed to maintain peak performance.

How much does it cost to replace a belt tensioner?

To get the belt tensioner replaced, you will pay anywhere from $140 to almost $400. The price of parts and labor varies from one car to the next, with most labor costs coming in at about $70 or $80.

What happens if belt tensioner fails?

When the tensioner fails, the serpentine belt will slip off and break. When this happens, the alternator, power steering pump, and AC compressor will stop working. Since there is no belt turning the pulley, the battery light will turn on, and steering will be difficult. The AC compressor will also stop working as well.

Where is the belt tensioner located?

The belt tensioner is on the front of the engine, between the crankshaft and alternator pulleys.

How do I know if my drive belt needs to be replaced?

  1. Strange Noises. One of the biggest signs that you probably need to take your vehicle to the dealership for a check is when you start hearing strange noises coming from your engine. …
  2. Visual Signs of Wear. …
  3. Mileage Indicators. …
  4. Breakage is Bad.

What noise does a bad serpentine belt make?

As these belts wear out, they can begin to squeak or squeal. They make noise because there is not enough tension on the belt, or because the pulleys are misaligned or weak. Often, simply changing the belt will make it stop squealing. The noise isn’t usually a danger, though it does sound alarming.

How much does it cost to replace idler pulley?

The cost to replace the idler pulley of your driver belt will usually be somewhere between $80 and $200. The cost for the new part should only be anywhere from $40 to $90, while the cost of the labor will be anywhere from $40 to $110. These prices do not include added taxes and fees charged by the auto shop.