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Husqvarna LTH 120 problem


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#1 Horsepower OFFLINE  

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Posted April 27, 2016 - 07:14 AM

New to the repair of lawn and garden tractors.  Have a Husqvarna LTH 120 lawn tractor.  Engine starts well and runs smooth.  When I slowly start to release the brake, the engine severely bogs down and will kill unless I push the brake back on.  When the brake is pushed back on, the engine immediately comes back up.  Mower deck is removed.  Is this some type of clutch problem or is there a safety switch or lock-out I am missing?  Thanks for any help.


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#2 MolonLabe OFFLINE  

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Posted April 27, 2016 - 07:30 AM

:welcometogttalk: Could be as simple as a stuck brake, not an uncommon problem.

 


Edited by MolonLabe, April 27, 2016 - 07:38 AM.


#3 Alc ONLINE  

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Posted April 27, 2016 - 07:32 AM

Welcome to GTTalk , not familiar with your machine but with it shut off can you se if  are all the belts and pulleys free ?  


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#4 shorty ONLINE  

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Posted April 27, 2016 - 09:02 AM

Welcome to GTtalk!
On my Husqvarna YTH150, the brake pedal is also the clutch. When you release the brake, the first half of the pedal travel is releasing the brake. And the second half engages the clutch. I would slide underneath and check the belt. Could be caught on something or a idler pulley seized up.

Edited by shorty, April 27, 2016 - 04:06 PM.

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#5 crittersf1 OFFLINE  

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Posted April 27, 2016 - 10:39 AM

:welcometogttalk: :camera:



#6 Horsepower OFFLINE  

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Posted April 27, 2016 - 03:17 PM

II have checked the brake and the disc turns freely.  The idler pulley's are not bound up either.  With the engine shut off, you can turn the main drive hub below the engine and you can turn the belt also.  I don't see any clutch mechanism directly below the engine and above the main drive pulley.  Is it located at the rear, above the trans axle?  As you can see I am at the bottom end of the learning curve on these machines.  Thanks for all the help.



#7 shorty ONLINE  

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Posted April 27, 2016 - 04:12 PM

I think it is just a belt tightener for a clutch. With the brake on, try to spin the pulley on the rear. Another thing I just thought of, if the belt would have jumped out of a guide it could bind.
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