This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Construction and other equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


hd 21-b dozer
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
ctaxle View Drop Down
Bronze Level
Bronze Level


Joined: 12 Jun 2023
Location: ellington, ct
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ctaxle Quote  Post ReplyReply Direct Link To This Post Topic: hd 21-b dozer
    Posted: 12 Jun 2023 at 7:59am
customer tells us that the transmission uses ATF dexron3. does that sound right? does not have good manual on the unit. thank you , pete
Back to Top
Sponsored Links


Back to Top
Ray54 View Drop Down
Orange Level Access
Orange Level Access


Joined: 22 Nov 2009
Location: Paso Robles, Ca
Points: 4545 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2023 at 11:38am
I don't think anything newer than original dextran was around when that transmission was designed. I know my uncle used 2 or 3 different products over the 30 years he ran his HD 21. I believe the last years he used a Mobil oil product, probably hydraulic/transmission fluid. But cannot say for sure as he has been gone 20 years, as well as the tractor. So no help. 
Back to Top
Codger View Drop Down
Orange Level
Orange Level
Avatar

Joined: 23 Dec 2020
Location: Utopia
Points: 2041 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2023 at 1:21pm
Dexron will work but I would use a transmission oil meeting Allison C-3 , or TO-4 specifications as it is backward compatible.

Dexron use is really for very cold weather operations but again, it will work.

If you will post the tractor serial number I'll attempt to get you a manual in soft copy.
That's All Folks!
Back to Top
ctaxle View Drop Down
Bronze Level
Bronze Level


Joined: 12 Jun 2023
Location: ellington, ct
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ctaxle Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2023 at 2:33pm
thank you for the info. where would i find the serial number? Pete
Back to Top
DMiller View Drop Down
Orange Level Access
Orange Level Access


Joined: 14 Sep 2009
Location: Hermann, Mo
Points: 31098 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jun 2023 at 5:31pm
As with my 7G when had it, UNDER 30F was Recommended to change to Type A ATF, Whale Oil Based and NLA, Dextron was the replacement and NOT advised for the Power Shift Boxes.  Use 10W Hydraulic Trans Oil or HYTRANS Fluid.
Back to Top
ctaxle View Drop Down
Bronze Level
Bronze Level


Joined: 12 Jun 2023
Location: ellington, ct
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ctaxle Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jun 2023 at 11:13am
thank you dmiller!
Back to Top
DieselBumpkin View Drop Down
Bronze Level
Bronze Level
Avatar

Joined: 10 Nov 2022
Location: USA
Points: 33 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DieselBumpkin Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jun 2023 at 7:53pm
Not to add to the confusion, but going from memory, the original Dexron had whale oil in it, and Dexron II was the replacement for it that caused transmissions to fail because it couldn't lubricate as well. Dexron III did a lot better than Dexron II and can handle higher temperatures which isn't needed here. There was a lot of backward compatibility to a point. Modern ATF like Dexron III is thin as water and has additives to keep friction material suspended so it's picked up by the filters. It works great for cleaning caked on grease off cars. Makes sense that they would recommend ATF at low temperatures.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.055 seconds.


Help Support the
Unofficial Allis Forum