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185 serial number and Hyd oil.
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N6PETE View Drop Down
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Joined: 02 Jan 2010
Location: Camanche, Iowa
Points: 227 		Post Options Post Options   Thanks (0) Thanks(0)   Quote N6PETE Quote  Post ReplyReply Direct Link To This Post Topic: 185 serial number and Hyd oil.
    Posted: 21 Jun 2021 at 7:05pm
Just bought a 185 with a 400 loader. I am trying to find the serial number to see what year it is. There is a number stamped on the right side of the bell housing 36590. There is also a number written on the back under the seat 79475 that looks like someone at the factory wrote on for shipping.
Also, what kind of hydraulic oil does it take? I added ATF when I got it and now I changed the hydraulic oil and it came out tan which could be water from sitting around or a mix of the ATF and brown brake hyd oil they used later for both hydraulic, trans and differential in the later tractors. 

TIA 
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DougG View Drop Down
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Joined: 20 Sep 2009
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Points: 8284 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jun 2021 at 7:26pm
Wow interesting oil descreptions and colors- best bet is to put if off to the side and pull all the hydraulic plugs - drain it - flush it - refill with 303 Pure Flo- or now PUR Flow 334 oil and good to go

Edited by DougG - 22 Jun 2021 at 5:23pm
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N6PETE View Drop Down
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Joined: 02 Jan 2010
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Points: 227 		Post Options Post Options   Thanks (0) Thanks(0)   Quote N6PETE Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jun 2021 at 8:02pm
I put the wrong hydraulic fluid in. Instead of ATF I should have put in power fluid which is wet brake fluid equivalent to 821 power fluid. 

Guess it's drain time again. 
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DrAllis View Drop Down
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More likely a 500 loader, not a 400 series.
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WF owner View Drop Down
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Points: 4943 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2021 at 6:27am
DO NOT USE 303 !!!

Almost all universal hydraulic fluids have something on the side of the pail saying what manufacturers specs it meets. Make sure the hydraulic fluid you buy meets Allis Chalmers 821 Power Fluid specs.

Again, DO NOT USE 303 !!!
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jiminnd View Drop Down
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Joined: 16 Sep 2009
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Points: 2290 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jiminnd Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2021 at 9:32am
Re check your serial number, I think the last number is about 15960?  I have 15903 and I think it is about 59 from the last one, those numbers are hard to read.
1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner)
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DougG View Drop Down
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Points: 8284 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2021 at 5:21pm
The Pure Flo 303 has always been a good grade oil, they changed the number to 334 now , the 303 you want to stay away from is the straight generic 303 Tractor Supply and other farm stores sell - its thin as water and freezes in winter- thats the bad stuff 
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