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mf 12 hydro transmission help


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#1 collinmf12 OFFLINE  

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Posted January 23, 2016 - 01:01 PM

Hello guys I currently got my Massey 12 hydro out and I always hold it the brake to help start it. So it started up and left the brake out and the transmission made an awful noise. It made the tractor so much louder. So I pushed the brake in and it ran fine and the noise went away but when I left the brake out again the noise came back. Any help would be appreciated. Thanks collin
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#2 chris m OFFLINE  

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Posted January 23, 2016 - 02:42 PM

Is it possible it is just a bad idler pulley bearing? Or maybe the fan on the Hydro pump is bent and hitting something

 

Does it sound like something is hitting something or is it a wine or growling noise etc.. ?


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#3 collinmf12 OFFLINE  

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Posted January 23, 2016 - 04:54 PM

Is it possible it is just a bad idler pulley bearing? Or maybe the fan on the Hydro pump is bent and hitting something
 
Does it sound like something is hitting something or is it a wine or growling noise etc.. ?


Its a winning noise.
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#4 chris m OFFLINE  

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Posted January 23, 2016 - 05:37 PM

Is it low on Hydro fluid? if not could need a new hydro filter or it is just getting worn out due to age?

 

If it is really cold that could cause the noise also.


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#5 chieffan OFFLINE  

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Posted January 23, 2016 - 06:21 PM

I like to warm the hydro's and transaxel up before I start them  Use a portable forced air heater and it don't take long at all.  Start easier, run better and quicker and much easier on them.


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#6 collinmf12 OFFLINE  

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Posted January 23, 2016 - 06:26 PM

I like to warm the hydro's and transaxel up before I start them  Use a portable forced air heater and it don't take long at all.  Start easier, run better and quicker and much easier on them.


OK thanks I'll try that to

#7 collinmf12 OFFLINE  

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Posted January 23, 2016 - 06:28 PM

Is it low on Hydro fluid? if not could need a new hydro filter or it is just getting worn out due to age?
 
If it is really cold that could cause the noise also.


No it make noise when its warm out to. I'll check the fluid thanks for all the help!
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#8 DH1 OFFLINE  

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Posted January 23, 2016 - 06:49 PM

Does the tractor move? Hydro still drive the tractor?



#9 collinmf12 OFFLINE  

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Posted January 23, 2016 - 09:24 PM

Does the tractor move? Hydro still drive the tractor?


Yes it moves just noisey

#10 shorty ONLINE  

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Posted January 23, 2016 - 10:05 PM

Is this belt drive or drive shaft? Belt drive could be a bad belt or drive shaft could be rag joint failing.

#11 KennyP OFFLINE  

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Posted January 24, 2016 - 06:26 AM

Just out of curiosity, was it real cold when you started it? Possible frozen moisture in there?



#12 DH1 OFFLINE  

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Posted January 24, 2016 - 08:38 AM

Then I think as others have said, check the idler pulleys, fan, anything that touches the belt.

Most likely you'll find something wrong there.


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#13 AriensGT16 OFFLINE  

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Posted February 13, 2016 - 07:25 PM

The Massey 12 hydro is a belt driven tractor. It uses a long drive belt from the engine to the hydro that has 3 idler pulleys it travels around. Two of them are the same and the third is a larger belt tightener. If memory serves correctly, when you depress the brake pedal, it also raises the belt tightener pulley which disengages the transmission. It sounds to me like the bearing on one of these idlers has gone bad hence whining noise.

 

To check all of these idlers, remove the front belt guard around the engine pulley, remove the right tire guard from the fender and step plate. Next remove the transmission cover in front of the seat and fenders and then the right step plate. You should now be able to see the large rear idler/tightener pulley as well as the two smaller guide idlers over which the belt runs. From here it should be easy to determine which pulley has the bad bearing.

 

According to JacksSmallEngines.com all of these pulleys and the belt are still available from Massey.  While there, I would replace the belt as well as check that the transmission pulley is not loose on the shaft and that the cooling fan is good and not hitting anything. AgcoPartsBooks.com has the parts book online for this tractor that will show you all of the parts and part numbers you will need.


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