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134 Hydraulic Oil (vs) Marine Sae 80-90


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#1 Russ OFFLINE  

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Posted August 24, 2012 - 06:06 PM

Made a big mistake just a few min's ago,, I was putting Hydraulic oil in my read end of my tractor but end up puttin Marine SAE 80-90 oil in it,, Will this hurt anything or should I try an drain out the 80-90,, I have both oil's in the same kind of bottle an I forgot to mark whitch bottle I put the Hydraulic oil in,, But now I know but already put the 80-90 in rearend which I am talkin about the trans,,,, Would it hut to go ahead an leave it like it is or should I drain it out,, I have not started my tractor yet since I have done this,,, :confuse:
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#2 GTTinkerer OFFLINE  

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Posted August 24, 2012 - 06:16 PM

Most hydraulic fluids are in the 10 to 30 weight range. How did the fluid look that was in the rear axle when you drained it?

Me I would drain it and refill with the proper fluid.
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#3 Newpaws493 OFFLINE  

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Posted August 24, 2012 - 06:16 PM

ooh, I can hardly wait on this answer as I have plenty of marine oil and was wondering about this issue, likewise the grease. :confuse:
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#4 Russ OFFLINE  

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Posted August 24, 2012 - 06:30 PM

Mine was a lil low so I added just over a half a quart to it but it was with the 80-90,,lol,, I spilt an lil of each on a cardboard box to see if I could tell the diff in the 2 an yeap I can,,lol,, 80-90 has a lil more yellow to it ,,
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#5 Russ OFFLINE  

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Posted August 24, 2012 - 06:35 PM

So now I know the Hydraulic oil is in blue bottle with the yellow cap an will write on the bottle so it won't happen again,,lol,, An yea Newpaw I know what ya mean,, I have about 14 gallons of the 80-90 out in my shed for the lower units on boats that I work on at times an change all year round,,lol

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#6 JDBrian OFFLINE  

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Posted August 24, 2012 - 06:54 PM

80w90 is too thick for a hydro trans. I'm not sure if it will mix with the existing oil. I'd remove it to be on the safe side.
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#7 olcowhand ONLINE  

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Posted August 24, 2012 - 07:25 PM

I would drain to get that out. You don't want that in there for sure!
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#8 Cvans ONLINE  

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Posted August 24, 2012 - 07:51 PM

I would drain to get that out.

I agree. The formulations of these two oils is completely different.
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#9 CASENUT OFFLINE  

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Posted August 24, 2012 - 09:15 PM

If it is only viscosity we are concerned about and flow, seems to me ATF would be a better agent than any oil due to the fact it is loaded with detergents, (stay clean forever), Transmit hydraulic force excellently, and 'flow' quite well regardless of temperature...so if viscosity is the only issue I submit that ATF would be best...However, I sincerely doubt this to be the case...any others?

#10 Russ OFFLINE  

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Posted August 24, 2012 - 09:44 PM

hhhhmmmm,,, Well NutCase i would mainly thinkin that maybe the 80-90 would be to thick an mite mess something up,, I have never mess with nothing Hydraulic at all like this,, I do know I had a lil leak at the filter on the rearend but I fixed that,, Then filled it up an it took about a half of a quart to fill it,, I don't know if the 2 oil's will mix ok or if it will hurt anything or just go ahead an use it like it is,, So I just wanted to see what everybody else thinks or if they have tryed a Hydraulic with the 80-90 ,, I just don't want to hurt anything
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#11 Bmerf ONLINE  

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Posted August 24, 2012 - 09:56 PM

I don't know Russ, It takes 6 quarts to fill it, and I don't know if a half a quart would hurt it or just mix in. To be safe I say to drain and refill. That trans is probably expensive.
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#12 Russ OFFLINE  

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Posted August 24, 2012 - 10:01 PM

Yea I bet it is Bmerf lol,,, I will drain er tomorro eve then wont have to worry about it,,lol,, But it still just hits my head about if it would hurt anything but I don't want to try just to find out,,,,lol,, Thats why I am asking,,,,
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#13 HowardsMF155 OFFLINE  

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Posted August 24, 2012 - 11:46 PM

The gear oil itself may not be a problem, but sometimes the additive package can be. Some Gravely attachments use brass bushings and some gear oil specs attack the bushing, so for those you have to be very careful which spec gear oil you use. Your transmission might be fine, but it might also contain something that the additive package would attack. I'd say change it to be sure.
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#14 John@Reliable OFFLINE  

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Posted August 24, 2012 - 11:51 PM

I agree with the others, cheaper and quicker just to drain and replace it in the long run.
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#15 KennyP ONLINE  

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Posted August 25, 2012 - 05:20 AM

Russ, I'm with the others about draining it. There aren't too many 195's around and if it did mess things up, you might be in a world of hurt fixing it.
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