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Bolens QT17 bucking


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#1 Bobo OFFLINE  

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Posted August 11, 2010 - 07:37 AM

Good Day,

I have noticed that there are a few posts on the net concerning bucking or jerking hydro on Bolens QT's and similar. Well, now I have the same issue....violent bucking at just about any speed other than full. I have tried lifting the wheels and running the tractor backwards and forwards to remove air but that helped slightly. I also changed the fluid and filter. Any suggestions?

Regards,

#2 Bolens 1000 OFFLINE  

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Posted August 11, 2010 - 08:15 PM

Sorry,
I'm not too familiar with the hydro's....

#3 ducky OFFLINE  

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Posted August 11, 2010 - 08:34 PM

I think you are on the right path (air in the system).
Does the fluid get foamy? If not we may have to look elsewhere.

#4 Bobo OFFLINE  

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Posted August 12, 2010 - 07:19 AM

Hi ducky,

Thanks for the response. No foam. I am trying to think of where it could be sucking air from. Bad check valve or seal? Nothing is leaking. Where would you start troubleshooting ducky?

Thanks

#5 ducky OFFLINE  

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Posted August 13, 2010 - 02:25 PM

Is it a Sunstrand Hydro?
If so Here is a link to the service manual.
QSeries-servicemanual.pdf - Manuals - Garden Tractor Talk
Use these in most Masseys as well.
Never had this symptom before.
I would take a close look at the linkage and be sure it is not loose or sloppy. I think the swash plates could move at will if not held in place.
I say this because it will go away at full speed and you linkage would be able hold the swash plate at full travel.
Let me know.

#6 Bobo OFFLINE  

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Posted May 18, 2011 - 01:14 PM

Out of the four Bolens I had/have it seems to be always air. It is important to note that just raisning the tires and running the drive train a few times back and fourth will not remove all the air first time. I had to repaet the procedure every day for about a week and be sure you use the lift too. It was amazing how much was in there. Be persistent and it will come around.




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