A-C 416 hydro reversing problem

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   So a problem that is getting my goat and got me scratching my head.
Anyway the problem is it don’t like to reverse up a hill (lots of times giving it a push gets it to move) and it don’t travel at factory speeds. Tractor data stats it should travel forward @8.1 mph and reverse @3.8 mph. I have forward @5.1 and reverse @2.8-3.5 mph (on flat ground) so definitely something’s not right.

So far I have came up with it’s is a Victors T66 hydro equipped with a soft start valve which is possibly our problem. And some of the linkage most likely has slop.

Any one out there know what I’m talking about and maybe a fix?
Maybe replace the soft start valve and springs?

I will try and pull all the linkage off and get all the slop out before digging too much into the hydro.

	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

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
55allis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 30 Jun 2020 Location: Griswold Iowa Points: 1418	Post Options Post Reply Quote 55allis Report Post Thanks(0) Quote Reply Topic: A-C 416 hydro reversing problem Posted: 29 Jun 2026 at 12:59pm
	So a problem that is getting my goat and got me scratching my head. Anyway the problem is it don’t like to reverse up a hill (lots of times giving it a push gets it to move) and it don’t travel at factory speeds. Tractor data stats it should travel forward @8.1 mph and reverse @3.8 mph. I have forward @5.1 and reverse @2.8-3.5 mph (on flat ground) so definitely something’s not right. So far I have came up with it’s is a Victors T66 hydro equipped with a soft start valve which is possibly our problem. And some of the linkage most likely has slop. Any one out there know what I’m talking about and maybe a fix? Maybe replace the soft start valve and springs? I will try and pull all the linkage off and get all the slop out before digging too much into the hydro.
	1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors

Sponsored Links

only AC orange Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 06 Dec 2014 Location: Eastern Indiana Points: 630	Post Options Post Reply Quote only AC orange Report Post Thanks(0) Quote Reply Posted: 04 Jul 2026 at 6:05pm
	What kind of condition is the drive belt in (glazed over, stretched, chunks out of it)?

55allis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 30 Jun 2020 Location: Griswold Iowa Points: 1418	Post Options Post Reply Quote 55allis Report Post Thanks(0) Quote Reply Posted: 07 Jul 2026 at 11:40pm
	It’s not the best shape, maybe I should try replacing it… It has plenty of tighter left so I wonder if the belt is too tight…. Bought a new cheap belt though Carquest and it flew apart in a short amount of time so the old one went back on which after putting the mower deck on and putting Carquest belts on it they both went to crap in the first mowing.
	1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors