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HT18 with Sundstrand questions


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#1 bread320i OFFLINE  

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Posted June 19, 2011 - 11:12 AM

Ive been putting this HT18 back together, and noticed the hydro pedal wont move forward or backwards. Where do I start fixing this?

#2 Guest_jdecker94_*

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Posted June 19, 2011 - 11:32 AM

pull the brake pedal back all the way towards you. or take the fender pan off, something might be seized?

#3 bread320i OFFLINE  

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Posted June 19, 2011 - 02:31 PM

The brake is released all the way.

#4 olcowhand OFFLINE  

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Posted June 19, 2011 - 02:33 PM

So there's no other form of parking brake?

#5 bread320i ONLINE  

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Posted June 19, 2011 - 02:44 PM

This tractor and a brake pedal thats seperate from the rear end. For a parking brake theres a lever that holds the brake on. And the brake is completely seperate from the rearend or hydro unit.

#6 olcowhand OFFLINE  

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Posted June 19, 2011 - 02:48 PM

Then must either be a frozen shaft/linkage, or an internal problem with the hydro rock-shaft.

#7 bhts ONLINE  

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Posted June 21, 2011 - 01:54 PM

Adam here are a few pics of the inside of the pump. All i can tell is a bearing or a slipper has come loose to cause your problem. There is also spring pins that hold the shafts two the cam that might have broke and allowed the cam to get stuck.

Attached Thumbnails

  • p 002.jpg
  • p 003.jpg
  • p 001.jpg


#8 bread320i OFFLINE  

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Posted June 21, 2011 - 06:36 PM

So were on the same page. The input shaft spins. The shaft coming out the right side where the foot pedal connects is stuck.

#9 bhts OFFLINE  

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Posted June 21, 2011 - 08:01 PM

Here is a couple more pics. As you can see the shaft that your pedal hooks to is a two peice and is held by spring pins to the cam. The other pic is of the needle bearinds that the shafts move on. One of the needle bearings could be froze to the shaft or broken.

The only way to tell is to remove the pump and take it apart to see what is bad. It is not a hard job just remove pump and take the four bolts out that hold the case together.Just be carefull not to drop the pistons and damage one oh the slippers.

If you need more pics i can get them for you.

Attached Thumbnails

  • p 002.jpg
  • p 001.jpg


#10 bread320i OFFLINE  

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Posted June 21, 2011 - 08:51 PM

I took the pump apart today and found the cylinder block assembly to be damaged. All the pistons are broken and the block is gouged.

#11 bread320i OFFLINE  

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Posted June 21, 2011 - 10:12 PM

Good VS. Bad
Posted Image
Posted Image

#12 bhts OFFLINE  

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Posted June 21, 2011 - 10:37 PM

This pump was not in that bad of shape. If you need parts to fix that pump i kept this pump for that reasone. Just let me know.

#13 bread320i OFFLINE  

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Posted June 24, 2011 - 04:43 PM

I should be picking up a complete rearend/hydro tomorrow. I hope to have it back together by Sunday

#14 bread320i OFFLINE  

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Posted June 25, 2011 - 09:17 AM

Anybody know if new gaskets are available for the Sundstrand 15 pumps?

#15 wilberj OFFLINE  

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Posted June 25, 2011 - 09:24 AM

Anybody know if new gaskets are available for the Sundstrand 15 pumps?


Try this place BJ Hydraulics
See if you can get the old man on the line he knows every thing about them.
He was also the man who put the first Eaton 12 ever built togather.




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