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John Deere Lt155 Repair

repair

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#1 stevehorn OFFLINE  

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Posted March 21, 2014 - 08:37 PM

Have a John Deere LT155 riding lawn mower that I am trying to repair.

 

The tractor runs, but when the transmission is engaged, the drive belt is forced off the pulleys by the transmission fan. I have posted a video demonstrating the problem.

 

It appears that the fan is sitting too close to the pulley, but I can't see how to adjust the height next to the drive belt pulley.

 

Anyone know what might be the problem? Is there something I can adjust? We bought a new transmission fan blade, but after I got in to see the problem closer I really don't think it will make a difference.

 

 

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#2 New.Canadian.DB.Owner ONLINE  

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Posted March 21, 2014 - 09:03 PM

I don't think it is your fan.  Check your pulleys for a pinched area &/or alignment. 

 

P.S. Welcome to the forum.


Edited by New.Canadian.DB.Owner, March 21, 2014 - 09:04 PM.

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#3 trowel OFFLINE  

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Posted March 21, 2014 - 09:06 PM

Welcome to the fourm, :ditto:


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#4 stevehorn OFFLINE  

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Posted March 21, 2014 - 09:22 PM

I should have included: The fan blades are eaten up on the ends. It's pretty clear that they're hitting the belt.


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#5 New.Canadian.DB.Owner ONLINE  

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Posted March 21, 2014 - 09:37 PM

Yes, but when?  Are they hitting before or after the belt departs the pulley?  



#6 superaben OFFLINE  

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Posted March 21, 2014 - 10:52 PM

These small lawn tractors usually break/loosen the transaxle over time.  Check the mounting bolts and see if they are good and tight.  Something is not lined up 100%.

 

Ben W.



#7 jd.rasentrac ONLINE  

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Posted March 22, 2014 - 02:42 AM

Welcome Steve,

 

another questions:are the belt, the belt strain and the pulleyes ok, are the other mechanical components "at the right place" and "in the right direction" (like N.C.DB.O said)... maybe jdpc can help with some graphics like this

 

 

 

MP23124________UN22JUN00.gif


Edited by jd.rasentrac, March 22, 2014 - 02:49 AM.


#8 jd.rasentrac ONLINE  

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Posted March 22, 2014 - 03:02 AM

another link to the JD Manuals site and the LT155 OM



#9 Gabriel OFFLINE  

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Posted March 22, 2014 - 09:52 AM

WELCOME!

#10 Gabriel OFFLINE  

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Posted March 22, 2014 - 10:07 AM

Any pics of your drive system? That might help.

#11 HDWildBill ONLINE  

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Posted March 22, 2014 - 10:14 AM

Welcome to GTtalk Steve. Can you actually watch the fan lift the belt off?  Watching the Video it almost looks like it doesn't have enough tension on the belt.  Use Wolfgang diagram and check each component and also make sure the belt is routed correctly.


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#12 Gabriel OFFLINE  

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Posted March 22, 2014 - 02:05 PM

Welcome to GTtalk Steve. Can you actually watch the fan lift the belt off?  Watching the Video it almost looks like it doesn't have enough tension on the belt.  Use Wolfgang diagram and check each component and also make sure the belt is routed correctly.

Yes, when you release the parking brake and let up on the brake pedal, the belt should be tight.

#13 Gabriel OFFLINE  

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Posted March 22, 2014 - 02:10 PM

This is a picture of the drive system on a LT160, but I think it is basically the same as a LT155.

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  • deere_lt160_drive_belt.jpg


#14 Gabriel OFFLINE  

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Posted March 22, 2014 - 02:12 PM

This is the drive on my LT155 (not quite as good of a picture as the previous one) before we changed the idler bracket (it was rubbing the belt).

Attached Thumbnails

  • 100_6211.JPG






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