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D12 Trans/Hyd Fluid
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Jeeper38 View Drop Down
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Joined: 18 Jul 2011
Location: Mo
Points: 140 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jeeper38 Quote  Post ReplyReply Direct Link To This Post Topic: D12 Trans/Hyd Fluid
    Posted: 14 Jun 2017 at 12:18pm
Just curious what people are using for the hydraulic/transmission fluid. This is in a 1963 D12 series II. Currently running "303" but I always think it seems like a very thin fluid. Maybe it should be. I'm running "303" because that what we used in them growing up.
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RMD View Drop Down
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Joined: 07 Oct 2009
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Points: 304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RMD Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jun 2017 at 2:07pm
Original specification for the CA (and I think also for D-10/12) was 20W non-detergent motor oil, which is also pretty thin (but could take a while to warm up in the winter).
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polarbear View Drop Down
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Points: 331 		Post Options Post Options   Thanks (0) Thanks(0)   Quote polarbear Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 2017 at 6:27pm
put in some lucas
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DougS View Drop Down
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Points: 2490 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougS Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jun 2017 at 6:33pm
Originally posted by RMD RMD wrote:


Original specification for the CA (and I think also for D-10/12) was 20W non-detergent motor oil, which is also pretty thin (but could take a while to warm up in the winter).

I wouldn't go any thicker, considering the same oil is used in the hydraulic system. Hi Trans is your best bet. I wouldn't use additives of any sort.
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polarbear View Drop Down
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Points: 331 		Post Options Post Options   Thanks (0) Thanks(0)   Quote polarbear Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 2017 at 10:00am
use lucas in final drives and transmissions wre 250 gear oil was what was to be used works great and is a additive for oil won't hurt a bit used it in thje 13 speed truck transmission it run 150 degree cooler this works
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Macon Rounds View Drop Down
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Points: 2229 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Macon Rounds Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 2017 at 3:09pm
I agree
Rear Hydraulic Pump "SHARES OIL" with transmission and differential.
Running any kinda gear oil or thick additives increases chances of hydraulic behaviors ..... 
I would use OEM recommended oil......

Edited by Macon Rounds - 29 Jun 2017 at 3:16pm
The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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