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D17 series 1
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Stanley View Drop Down
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Joined: 16 Oct 2009
Location: PDC, WI
Points: 193 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stanley Quote  Post ReplyReply Direct Link To This Post Topic: D17 series 1
    Posted: 22 Sep 2016 at 11:31am
Can some one tell me what weight oil is used for the transmission in an early D17. Thanks.
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DanD View Drop Down
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Joined: 11 Sep 2009
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Points: 856 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DanD Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 6:17pm
80-90 in the transmission itself or better yet use modern trans hydraulic oil.   Can use the trans hydraulic in the power director and hydraulics too....that way if you develop a leaky internal seal or blow an internal hose you're not going to mix different oil types.
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Stanley View Drop Down
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Joined: 16 Oct 2009
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Points: 193 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stanley Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 8:22pm
Isn't the trans hydraulic oil much lighter than 80-90?
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Allis dave View Drop Down
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Joined: 10 May 2012
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Points: 3016 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Allis dave Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 8:42pm
Book calls for 80-90 in the trans, rear end and finals.
I like to use 80-90 in my 45. I think it sticks to the gears better if it gets hot.
Modern tractors use Hyd fluid everywhere and a lot of guys use that instead of gear oil in these old tractors. Really both are probably fine but I prefer to use the 80-90

Edited by Allis dave - 23 Sep 2016 at 6:54am
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Dan73 View Drop Down
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Joined: 04 Jun 2015
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Points: 6054 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dan73 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 8:49pm
I am with Dave I use the 80-90 there was a service bulletin at one point that states you should use hydraulic oil in the transmission but I find it makes them louder and I just feel better with 80 90 weight gear oil on my big gears. As to the weight questions yes hydraulic oil is 20 weight oil with additives much thinner then gear oil.
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Joined: 14 Sep 2013
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Points: 1047 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Scott B Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 8:50pm
I use hydr oil. No problems
D17 Series 1
Allis B- 1939
Allis B- 1945
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Dan73 View Drop Down
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Joined: 04 Jun 2015
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Points: 6054 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dan73 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 8:56pm
Oh and as to the leaking issue I sort of figured if I pull the rearend or torque tube dipstick and the oil is mixed and wrong it will tell me quickly what is wrong. The common leak problem with these that I have heard of is the hose to the lift cylinder breaking and filling the rearend with hydraulic oil. If it where mine and I was loosing hydraulic oil I would want to know before it just started leaking out of the rearend from being over full. Mixed oil will show up on a dipstick. Just my two cents.
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Stanley View Drop Down
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Joined: 16 Oct 2009
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Points: 193 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stanley Quote  Post ReplyReply Direct Link To This Post Posted: 22 Sep 2016 at 9:06pm
Thanks for the info.
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DanD View Drop Down
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Points: 856 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DanD Quote  Post ReplyReply Direct Link To This Post Posted: 23 Sep 2016 at 8:24am
Allis-Chalmers officially changed recommendation to 821 trans-hydraulic oil after it came out.  Guess they thought it was better than the gear lube.  And don't just use regular hydraulic oil either, use the stuff that's compatible with the 821.
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