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Sears hydro trac 14 engine help

briggs and stratton hydro trac sears antique wont start spark

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#16 craftsmanmowerfreak OFFLINE  

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Posted February 01, 2016 - 09:02 AM

heres a hydro 12 manual tranny is same i imagine  http://searstractorm...s/91725500o.pdf



#17 BigRedFishDad OFFLINE  

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Posted February 01, 2016 - 12:34 PM

Thank you. The manual for hydro trac 12 is one here and has the same transmission. I filled it up with the dipstick but it still won't move.... Don't really know what's wrong.

#18 craftsmanmowerfreak OFFLINE  

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Posted February 01, 2016 - 10:58 PM

could have a stripped spline look up rooney on youtube


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#19 MH81 ONLINE  

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Posted February 01, 2016 - 11:25 PM

Is the belt tight?

#20 BigRedFishDad OFFLINE  

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Posted February 02, 2016 - 08:45 AM

I looked up Rooney on YouTube and his hydro is making the same noises mine is so tonight I will take apart the transmission and see if the splines are stripped

#21 BigRedFishDad OFFLINE  

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Posted February 02, 2016 - 09:36 PM

Ok so I took out the transmission today and separated the final drive from the hydraulic pump and found that the splines and the final drive were slipping and so we flipped the slimed coupler piece around and we no longer had any slippage. Then we went and turned the input pulley of the hydraulic pump a don it would go fine in reverse but when we put the lever in forward it wouldn't do anything. So now I am going to disassemble the hydraulic pump tomorrow and see if there are any bad seals or anything in there. Does the hydraulic pump have to be spinning fast to pump the fluid and will spinning it by hand pump the fluid and make the gears turn? Does anyone know what could be the problem?

#22 BigRedFishDad OFFLINE  

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Posted February 02, 2016 - 09:36 PM

These transmission are indeed Sundstrand units....there was a tag on the hydraulic pump with a model # and serial #.
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#23 ACmowerguy ONLINE  

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Posted February 03, 2016 - 12:20 AM

If it helps, the transmissions on these machines were the same series that were used in the Massey MF12 Hydros.  If you can find a Massey MF-12 service book it will explain the inspection and repair of the hydrostatic pump and final drive. Beware many parts are NLA. Even the hydro filter is NLA. 



#24 BigRedFishDad OFFLINE  

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Posted February 06, 2016 - 12:24 AM

Got the tractor put back together today and it runs like a champ. Thanks guys!

#25 MH81 ONLINE  

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Posted February 06, 2016 - 12:27 AM

Did you find anything bad in the tranny other than the splined coupler?

How long do you expect the repair to hold up? Does it look like a long term solution?

#26 BigRedFishDad OFFLINE  

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Posted February 06, 2016 - 11:17 PM

when I put the hydro transmission back together the coupler wasn't slipping so I just installed it in the way it came out. The reason why the tractor wouldn't move was because a part in the accretion valve had been installed backwards (by someone) and I put in the correct way and the hydro was pulling our drag harrow and logs around the property like a champ today
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#27 MH81 ONLINE  

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Posted February 07, 2016 - 08:03 AM

Glad you were able to figure it out.
Congrats on a nice looking and good working tractor.

The hydro will make it one of your favorites to use.

#28 ddcrim OFFLINE  

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Posted February 09, 2016 - 02:57 PM

At that turn over speed you should have a good spark at the plug and it should not jump around.Go back to the points setup and start over.







Also tagged with one or more of these keywords: briggs and stratton, hydro trac, sears, antique, wont start, spark

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