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john Deere 185

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#1 Jehtro OFFLINE  



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Posted May 27, 2011 - 12:47 PM

Working on getting my old JD185 ready for the father in-law, now that I got the 318. Anyway, I was thinking I should change the hydrostat fluid. What will work is these lawn tractor hydros? I've being told either ATF, some say SAE 30 wieght oil?

#2 Gary400 OFFLINE  



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Posted May 27, 2011 - 06:52 PM

if you have a JD dealer around i'd use there oil . hy-guard

#3 Aussiedog OFFLINE  



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Posted May 27, 2011 - 11:56 PM

I just changed the oil in the Tuff Torq K-51A hydro transmission that's in my Scotts Lawn tractor made by John Deere. Tuff Torq put in 10-30w oil at the factory but now recommends that you replace that with Castrol synthetic 5-50w oil at your next oil service . With the 5/50w synthetic I could really tell a big difference. It was much quicker, smoother and feels more powerful. I'd see who made your hydro transmission and ask them for their current recommendation on oil.

#4 Bentwrench OFFLINE  



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Posted May 28, 2011 - 01:46 PM

My JD shop service manual for the 185 calls fot 30W oil. You will also need to remove the fender pan to get to the allen head plug on top of the pump. This needs to be removed to vent air while filling.

#5 JDBrian OFFLINE  


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Posted May 29, 2011 - 04:54 AM

That is unusual isn't it. 30 wt would be thick in cold weather. I would think that would make the hydro cold blooded in the winter. Your JD dealer has a listing of fluid types for all the older machine. You could check with them to see if there is a new recommendation for the fluid. I have heard some good comments on using synthetic fluid in hydro's. Maybe you can get synthetic 30W?

#6 Python00 OFFLINE  


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Posted June 01, 2011 - 10:50 PM

I have been told the same thing, My Gravely calls for 30W motor oil but I have been running Hy Guard in my 314/185