Group 31 Batteries

It sure can be a problem, but it also might work fine for a long time. It is certainly not desirable, and I wouldn't want it on any machine/vehicle that I considered to be critical.

Sounds faulty from the get go. They don't come loose with normal use and should take some abuse as well before that happens. Worst case is poor connection internally and hydrogen BOOM!

1963D17 wrote:

That post attaches to the grid plates. Quality group 31's use a 1/2" rod to the grid. Cheaper one's a 3/8". When they wiggle the rod is usually corroded and getting thin allowing the stud to move. This is made worse by the farmers best friend. Using his pliers to wiggle off the cable instead of prying it straight up.

A stud post should not require any prying. Remove nut and lift coble off.

Well I'll be taking it to the store Friday, we'll see what they say. Battery is only 7 months old.

Tbone95 wrote:

Well I'll be taking it to the store Friday, we'll see what they say. Battery is only 7 months old.

Well?

'49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2

Stud post batteries are great! The entire trucking industry runs on them. But you can also damage them if you use too long of 9/16 wrench on them. And never use a gun on them! Lol. I use short wrench or ratchet and snug carefully. Not sure what the torque would be Maybe 15-18 ft lbs at most. I have never torqued those. Just be careful. 😀😀

Ed (Ont) wrote:

Stud post batteries are great! The entire trucking industry runs on them. But you can also damage them if you use too long of 9/16 wrench on them. And never use a gun on them! Lol. I use short wrench or ratchet and snug carefully. Not sure what the torque would be Maybe 15-18 ft lbs at most. I have never torqued those. Just be careful. 😀😀

Yes the trucking industry has almost gone to exclusively Group 31 stud post batteries. They are supposed to use LEAD nuts that will NOT over torque the stud but have the nut strip out. Then some Yahoo just goes to the hardware bin and grabs a 3/8" coarse thread nut, then the problems begin.

Locally I can buy a quality 7 year Group 31 stud post battery for under $100. Whereas a small 5 year car battery is close to $130. I use Group 31 stud post batteries in everything that they will fit in. That way when the big truck gets a new set I can use the good singles until they give up.

If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY

	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