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John Deere 185 Hydro Help Needed


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#1 Gabriel OFFLINE  

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Posted April 24, 2014 - 09:06 PM

I changed the oil in the hydrostat on a John Deere 185. It now won't go forward. I did get it to go in reverse, and it has good power in reverse. I tried to bleed the air out of the system like the JD service manual tells you to, but it does not seem to make any difference. I put the correct type of oil in. Thanks in advance.

#2 Gabriel OFFLINE  

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Posted April 24, 2014 - 09:07 PM

Oh, by the way, it's a Sundstrand hydro.

Edited by Gabriel, April 24, 2014 - 09:09 PM.


#3 Cat385B ONLINE  

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Posted April 24, 2014 - 09:13 PM

Did you lift the rear end off the ground while trying to run the hydro?
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#4 Gabriel OFFLINE  

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Posted April 24, 2014 - 09:24 PM

Did you lift the rear end off the ground while trying to run the hydro?

Yes.

#5 Cat385B ONLINE  

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Posted April 25, 2014 - 04:16 AM

Did you remove both plugs when draining? The one facing forward and the one towards the left rear tire? If so, it sounds like the relief valve plug (the forward facing one) got some crud in it or didn't seal properly.

image.jpg
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#6 Gabriel OFFLINE  

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Posted April 25, 2014 - 09:51 AM

Did you remove both plugs when draining? The one facing forward and the one towards the left rear tire? If so, it sounds like the relief valve plug (the forward facing one) got some crud in it or didn't seal properly.

attachicon.gifimage.jpg

This is the plug I took out. I do start to wonder if the little ball is not seated like it should be. I read in a service manual for a hydro that is almost identical to this one, or is identical, that the hole where the valve goes has to be facing up when you install the valve.

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#7 Gabriel OFFLINE  

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Posted April 25, 2014 - 09:55 AM

Did you remove both plugs when draining? The one facing forward and the one towards the left rear tire? If so, it sounds like the relief valve plug (the forward facing one) got some crud in it or didn't seal properly.

attachicon.gifimage.jpg

The page you show, is for the Eaton hydro. This one has the Sundstrand.

#8 Cat385B ONLINE  

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Posted April 25, 2014 - 04:05 PM

The page you show, is for the Eaton hydro. This one has the Sundstrand.

 

That'll teach me to post pics with small type with the IPod.  :wallbanging:


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#9 Gabriel OFFLINE  

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Posted April 25, 2014 - 08:52 PM

Did you remove both plugs when draining? The one facing forward and the one towards the left rear tire? If so, it sounds like the relief valve plug (the forward facing one) got some crud in it or didn't seal properly.

attachicon.gifimage.jpg

I got it figured out. One of the check valves was not working correctly. I took the plug out that is part of the check valve, thinking it was the drain plug. The steel ball must have moved and when I put the plug back in, the ball wasn't centered, or covering, the hole it blocks. I took the plug back out and positioned the ball, the best I could, against the hole. Then I put the spring and plug back in. Now it works great! Here's a picture that might help explain what I'm talking about.

Thanks for your help Cat385B!

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#10 Gabriel OFFLINE  

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Posted April 25, 2014 - 08:58 PM

I partly suspected that I had messed up the valve, when I read the service manual for the hydro. They said that when you install the valve, you have to have the cavity that it goes in facing up, probably so the ball gets positioned correctly.
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#11 Cat385B ONLINE  

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Posted April 25, 2014 - 09:36 PM

I would of thought when I changed mine I would of had the same darn thing happen to me. Guess I got a pass that one time.

 

I miss that nimble little guy some days.

 

treehouse 019.jpg

 

 


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#12 Gabriel OFFLINE  

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Posted April 25, 2014 - 10:24 PM

I would of thought when I changed mine I would of had the same darn thing happen to me. Guess I got a pass that one time.
 
I miss that nimble little guy some days.
 
attachicon.giftreehouse 019.jpg

The JD service manual made it look like it was either that plug, or that there would be a plug on the bottom of the hydro (I don't see any). Another place in the manual, made it sound like you remove the relief valve linkage and valve, then drain the oil, so maybe they mean for one to drain the oil out of the relief valve opening (maybe that's what they mean).

It's not my tractor (belongs to one of my customers), but after working on it and driving it, I don't think I'd mind having one myself!

Yours looks very nice!

Here's a pic.

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Edited by Gabriel, April 25, 2014 - 10:25 PM.

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#13 Cat385B ONLINE  

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Posted April 25, 2014 - 10:33 PM

Ooh, 47 deck instead of the little 38 deck. Note the bigger rear tires on his. Rear tires are bigger on the units that came with the bigger deck, and the deck hanger brackets are different. Also, the 38 deck uses a normal bagger, whereas the 47 deck had a powerflo bagger.


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#14 Gabriel OFFLINE  

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Posted April 25, 2014 - 10:35 PM

Ooh, 47 deck instead of the little 38 deck. Note the bigger rear tires on his. Rear tires are bigger on the units that came with the bigger deck, and the deck hanger brackets are different. Also, the 38 deck uses a normal bagger, whereas the 47 deck had a powerflo bagger.

Thanks, that's interesting!
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#15 Guest_rdehli_*

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Posted April 27, 2014 - 09:39 AM

good luck Gabriel
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