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Lawn Tractor Drive Belt


GeoCache's Avatar
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01-28-03, 06:29 AM   #1  
GeoCache
Lawn Tractor Drive Belt

The drive belt on my 3 year old Craftsman 19 horsepower Lawn Tractor slipped off. Can anyone tell me what the most common causes may be and a fix for the problem. Thanks all.

 
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cheese's Avatar
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01-28-03, 07:14 PM   #2  
Hello GeoCache!

What mower do you have? Which belt came off? A model# or better detail about your machine is needed to give specific advice.

In general: look for pulleys that are hard to turn or loose feeling and replace them. Look for misaligned pulleys and bent pulleys. check and adjust belt tension if necessary.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
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01-28-03, 09:28 PM   #3  
GeoCache
Lawn Tractor Drive Belt

Hi Cheese,

Thanks for replying. The Lawn Tractor is a Craftsman 917.270912. The V belt(part no. 138255) is the one that turns the transaxle pulley.

 
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01-29-03, 07:57 AM   #4  
Most of the time when the drive belt comes off, it because the belt retainers need adjusting. The belt retainers are bolted to the transaxle. When the clutch is disengaged the drive belt becomes loose enough to stop driving the transaxle. The belt retainers are designed to keep the belt in the pulley when the clutch is disengaged. When the retainers are adjusted properly they just clear the belt when the clutch is engaged.
On the Craftsman hydros the belt retainer has been knowen to be to low on the right side. You should be able to check this out after put the belt back on the transaxle, with the clutch engaged.
To correct this problem you will need a large screwdriver. Disconnect the mower deck swaybar and let it drop out of the way. Put the screwdriver under the retainer and pry the retainer up. Watch the fingers because the screwdriver could slip. Pry the retainer up so it just clears the belt. Don't forget to put the mower deck swaybar back in place.
Check the belt for nicks, cuts or burnt areas that sometimes happens when the belt comes off.

 
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01-29-03, 09:55 PM   #5  
I agree that the belt keepers may be allowing the belt to slip off when the clutch is disengaged...or the bearings in either an idler or tensioner pulley may be siezing. Check the belt over well as roger stated. Replacement may be a good idea.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
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