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Cub 1250 hydro slow response


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#1 coinman66 OFFLINE  

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Posted October 01, 2016 - 07:48 AM

My Cub 1250 has slow response in reverse and seems weak. Forward seems fine. Here is a pic if trunnion. Does it look ok? Gonna put rear end up on blocks today and adjust hydro lever neutral. It seems to wanna creep forward a hair in neutral. Should I take reverse check valve out and clean it? Have already put fresh hydro fluid and filter on it with same results.

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#2 64fleetside OFFLINE  

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Posted October 01, 2016 - 08:16 AM

Hard to tell from that angle but looks like it needs help. Is that a crack in the first pic?
My 129 was real worn and I had to rework the rectangle cutout. Pull the rear fender pan for a better look in there.
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#3 olds45512 OFFLINE  

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Posted October 01, 2016 - 08:26 AM

I would suspect you have a valve going bad, you can switch them and if reverse is good and forward now has a problem then you know it's a valve.
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#4 coinman66 OFFLINE  

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Posted October 01, 2016 - 08:47 AM

Don't see any cracks 64Fleetside? I will clean the reverse hydro valve and see if that helps. Maybe it's a linkage adjustment problem?

#5 IHCubGuy OFFLINE  

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Posted October 01, 2016 - 10:19 AM

I would suspect you have a valve going bad, you can switch them and if reverse is good and forward now has a problem then you know it's a valve.

x2  Easy and quick way to rule out the valve.


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#6 coinman66 OFFLINE  

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Posted October 01, 2016 - 12:36 PM

x2 Easy and quick way to rule out the valve.


If it were a valve, wouldn't it either work or not work? Can I take it out and clean it?
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#7 chieffan OFFLINE  

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Posted October 01, 2016 - 12:57 PM

Been fighting a free wheel problem with the same hydro in my cub.  Rebuilt the linkage, new springs, valves were rebuilt amd nothing helped.  Going to replace the pump when I get it.  Looked into having mine rebuilt.  $500 to open it up and let me know what it would cost to rebuild it.  Another shop quoted $1100 for complete rebuild.  Mine only acts up when the fluid gets good an warm/hot.  Afraid you may be looking at the same situation but hope not.


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#8 coinman66 OFFLINE  

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Posted October 01, 2016 - 02:02 PM

Problem fixed. The threaded rod linkage that goes to plate connected to trunnion needed adjusted. When I pulled hydro lever down in reverse, it wasn't moving trunnion enough.
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#9 chieffan OFFLINE  

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Posted November 05, 2016 - 07:30 PM

Glad you got it fixed with just an adjustment.  Solved my free wheeling problem also.  Installed a spring, cone and plug from a cast iron hydro in the one in the tractor where it was missing and it is working great again.



#10 dodge trucker OFFLINE  

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Posted November 06, 2016 - 09:00 AM

yeah those hydros are crazy expensive to have worked on. I have a Woods ZTR that has been sitting while I wait for a parts unit to show up for sale that I can get a hydro from.... sometimes wont move at all, when it will, it only will while the tractor is cold from sitting.  That one's an Eaton.  Then on my NH with a Vickers I wound up having to replace the hydro on that one too.


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#11 coinman66 OFFLINE  

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Posted November 09, 2016 - 06:31 PM

yeah those hydros are crazy expensive to have worked on. I have a Woods ZTR that has been sitting while I wait for a parts unit to show up for sale that I can get a hydro from.... sometimes wont move at all, when it will, it only will while the tractor is cold from sitting. That one's an Eaton. Then on my NH with a Vickers I wound up having to replace the hydro on that one too.


Why replace it? If ur just gonna use it to play around on and maybe mow, the rubber strap I had on there holding the hydro release valve worked fine. I mowed the yard with it right before the engine went bad and it worked fine.




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