ly. it seems as though the blade’s drive shaft will not spin.
Garden

Experienced gardeners share their insights in answering this question :
While you are checking the shear pin, check the blade drive shaft bearings and the the tightener pulley bearings. If a bearing seizes it will “snap” the belt and possibly break the spring.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

A badly worn or stretched belt can slip, causing the blades to turn very slowly or not at all. This is relatively common, as belts tend to stretch over time and need to be replaced regularly. A seized shaft on a spindle can cause the pulley not to rotate, and this can cause the belt to snap.
A common cause of belt breakage is excessive grass clippings on the deck. Grass clippings can work their way under pulleys and deck covers, causing series problems. Make sure to clean off your deck after every mower use and follow manufacturer recommendations.
Belt-the number one cause for your blades not to engage is that your belt is either stretched or loose causing it to slip or fall off completely. Belt could have snapped also. When you are trying to process too much grass/leaves they could pack up under your deck and push off your belt.
A: Your mower has two belts. Both play a role in making the blades turn. The “Deck Belt” goes around the pulleys right above the blades on the deck and then to a double pulley. The “Drive Belt” on your mower goes from the transmission, around an Idler pulley then over to the double pulley I mentioned before.
A perfectly tight mower belt can rotate without slipping off but not cause the engine to over-exert and overheat. If the belt does not slip off while working and is not producing unfavorable sounds that indicate wearing off of the belt, then that is the perfect tightness for it.
One is to keep the belt clean and lubricated. Another way is to check the tension of the belt periodically, and make sure that it`s not too tight or too loose. The last way is to get your car serviced regularly so that they can inspect the condition of your car`s drive belt and replace it if necessary.
The only pulleys you should be able to turn by hand when the serpentine belt is not in place are: the water pump, alternator, and power steering pump pulleys. The air conditioning compressor has a clutch on it that should spin freely as well but it will not be rotating the internals of the compressor.
Damaged bearing or pulley

A broken or seized pulley can quickly lead to a torn belt, or in less serious cases, the belt falling off of the engine. An engine without a belt can quickly run into issues such as overheating and stalling, as it`s the drive belt that allows the engine accessories to function.

The only pulleys you should be able to turn by hand when the serpentine belt is not in place are: the water pump, alternator, and power steering pump pulleys. The air conditioning compressor has a clutch on it that should spin freely as well but it will not be rotating the internals of the compressor.

Discover Relevant Questions and Answers for Your Specific Issue

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ROUTING OF BELT – Mtd Drive Belt 42"
ANSWER : Diagram is on the mowing deckBest regardsCk

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Drive belt Have replace drive belt but mower still has no forward movement. Mower is only 2 years old but its already had to have another drive belt installed by the dealer last year. wanted to do it myself but when i install belt theres hardly any tension so mower doesnt move. Checked and rechecked the diagram and is installed correctly. Cant find a tensioner adjustment if it has one.
ANSWER : I don’t have an answer for you, but Do you have a diagram of the Drive Belt?

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Replaceing mower deck belt on 20 hp 42 mower model no 917275660. Got the belt on. How do I get the cluch spring back on.
ANSWER : Are you refering to the spring attached to the end of the cable that runs up to the lever on the dash to engage the blades? All you needed to disconnect was that cable on top of the idler arm that’s held in place by a ‘hairpin’ and the left pulley cover to put the belt on.

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What is the diagram for traction belt routing
ANSWER : Go to this website, upper right hand corner and do a parts look up.
Search for your model and that good stuff they ask of you and then
choose mower housing should be there, browse the site it’s really cool
and has a lot of info. http://www.jackssmallengines.com
I did a
sample search for generic riding mower deck and found great diagram of
belt routing. Give it a try you will find same results Good Luck! Don’t forget the thumbs!

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My mower blades disengage when operating.
ANSWER : Not sure of your question, but if you mean, they start when you flip the switch and then disengage but the switch stays up.. you need to check two things. (1) The out put of your alternator, read the battery with a volt meter before you start it, then start up the engine and read the voltage again should be a higher reading with the engine running. 12.4 vdc with the engine off – 13.7 vdc with it running. (just an example). Next will be your seat switch.There is a switch under the seat if you are not sitting in the seat the blades should turn off. so the switch could be out of its socket, or broken.

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How to change drive belt – Huskee Tractor Replacement Riding Lawn Mower 42" Deck Mulching Kit fits Huske
ANSWER : Step 1 – Loosen tension and remove belt. Locate the adjustment fastener and loosen it. …
Step 2 – Inspect drive and drive pulleys. Check the drive and pulley wheels. …
Step 3 – Select correct replacement belt. …
Step 4 – Install V-belt. …
Step 5 – Correctly tension new belt. …
Step 6 – Start the engine.

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New drive belt immediately burned up after replacement
ANSWER : Make sure blades move ok. Check bad spindle bearings too

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Adjust the blade belt – Craftsman 42 in. Deck 19.5hp Lawn Tractor
ANSWER : Hi Terry:
As good luck would have it, I have one of these mowers.
As I see it, there are only two adjustments possible:
1) the for/aft positioning of the mower deck as determined by the length of the central front deck positioning rod.
2) the amount of tension on the spring that holds the engage idler against the belt. That can be changed by moving the bracket that anchors the spring.
I’ve had my unit for several years now and replaced blades, spindles, and pulleys (I mow far too many rocks) but never had to adjust the blade drive belt.
Hope this helps

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