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John Deere LX280 Help! #5143833
06/25/19 03:01 PM
06/25/19 03:01 PM
Joined: Jun 2019
Posts: 2
Marshall, Texas
johnmichael Offline OP
johnmichael  Offline OP

Joined: Jun 2019
Posts: 2
Marshall, Texas
Ok, I've got a John Deere LX280 mower and I am having problems with the mower deck, specifically the belt that goes from the motor to the mower deck. The belt is new and the correct size. When the deck is in the up position the belt is tight, but when I lower the deck in the mowing position the belt loosens up. Because of the slack the blade gets in a bind in grass that is less than 3 inches high. I don't know where to go from here.

Re: John Deere LX280 Help! [Re: johnmichael] #5144004
06/25/19 06:34 PM
06/25/19 06:34 PM
Joined: Jan 2011
Posts: 3,177
N.Ohio
Lubener Offline
Lubener  Offline

Joined: Jan 2011
Posts: 3,177
N.Ohio
Did you have the same exact problem before replacing the belt? The only thing that comes to mind is you might have the belt on the wrong side of a pulley.

Last edited by Lubener; 06/25/19 06:35 PM.

The "thinking" man's friend.
Re: John Deere LX280 Help! [Re: johnmichael] #5144126
06/25/19 09:50 PM
06/25/19 09:50 PM
Joined: Sep 2002
Posts: 2,940
VA
Gebo Offline
Gebo  Offline

Joined: Sep 2002
Posts: 2,940
VA
You must have the belt installed incorrectly. Maybe YouTube can help.

Can you post some pics for us?


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'07 Lex GX470 65K

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Re: John Deere LX280 Help! [Re: johnmichael] #5144163
06/25/19 11:07 PM
06/25/19 11:07 PM
Joined: Mar 2013
Posts: 1,049
NY
joegreen Offline
joegreen  Offline

Joined: Mar 2013
Posts: 1,049
NY
Is there some type of tensioner? My old jd garden tractor has a knob on the front of the tractor you use to tension the belt.

Last edited by joegreen; 06/25/19 11:07 PM.

1978 Chevrolet k20
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Re: John Deere LX280 Help! [Re: joegreen] #5144292
06/26/19 05:55 AM
06/26/19 05:55 AM
Joined: Jan 2011
Posts: 3,177
N.Ohio
Lubener Offline
Lubener  Offline

Joined: Jan 2011
Posts: 3,177
N.Ohio
Originally Posted by joegreen
Is there some type of tensioner? My old jd garden tractor has a knob on the front of the tractor you use to tension the belt.

For the mower, the engagement lever will move an idler pulley against the belt for tensioning.


The "thinking" man's friend.
Re: John Deere LX280 Help! [Re: johnmichael] #5144314
06/26/19 06:42 AM
06/26/19 06:42 AM
Joined: Dec 2003
Posts: 10,346
Florida, Cape Coral
Eddie Offline
Eddie  Offline

Joined: Dec 2003
Posts: 10,346
Florida, Cape Coral
I would GOOGLE a picture of the JD mower deck to see the correct belt install. I suspect the belt is missing the tension spring. Ed


2014 CX5 Touring 2.5L :-)
Re: John Deere LX280 Help! [Re: johnmichael] #5144342
06/26/19 07:20 AM
06/26/19 07:20 AM
Joined: Sep 2002
Posts: 2,940
VA
Gebo Offline
Gebo  Offline

Joined: Sep 2002
Posts: 2,940
VA
Hey, I ran into a situation where I bought a used JD mower where they had swapped mowing decks. I bought it from a used lawn mower dealer where they pieced together mowers. If I remember correctly, I purchased new belts for my deck per what JD dealer said I needed and upon removing the old belts from the deck I noticed they had different numbers. It caused a little confusion as I could barely get one of the belts on (I had to force it over the pulley with screwdriver) as it was too tight.

What we finally determined was the seller had replaced the original 38” deck with a 48” deck.

If you bought it used, you may want to check this out.


'98 LEX LS400 295K
'02 4Runner 235K
'05 Lex LS430 85K
'07 Lex GX470 65K

Schaeffer Oil
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
(Subject to Change as the Wind Blows)
Re: John Deere LX280 Help! [Re: johnmichael] #5144459
06/26/19 09:37 AM
06/26/19 09:37 AM
Joined: Jun 2019
Posts: 2
Marshall, Texas
johnmichael Offline OP
johnmichael  Offline OP

Joined: Jun 2019
Posts: 2
Marshall, Texas
Thanks for the ideas guys. I may have finally figured it out. The two brackets on the back of the deck were both bent from rusting. I am taking it to a welding shop to fix and then will test the mower. I will send before and after pics so you can all see.

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