JD 3020 Batteries

[ajhbike]

I have the 2 battery boxes and have worked through a bunch of slow cranking issues with you all.

I am currently using only one of the TSC 400 some odd CCA batteries to start. I used to have them hooked up in parallel but in the summer I reverted to 1 battery and it cranked pretty well. Being winter now it is cranking a lot harder. I am going to install a destroker on the PS up front...but if I hook both positive cables directly to the starter will I get 2X the CCA's and not cause any damage?

Also, would I connect each battery to ground or neg to neg to ground?

 

[Tx Jim]

Routing two 12 volt batteries negative posts cables to frame & both 12 V positive post cables to top post on starter solenoid is the best method for highest CCA delivered to starter

 

[big jt]

Probably gonna get flamed for my comments but here goes.

I absolutely HATE I say HHHAATTTEE batteries in parallel. You can hove one that is week or has a small short and you are
dead. Have to unhook at lease one of them to find and diagnose the bad battery or whatever is going on (yes I do replace
in pairs).

Have converted all my stuff with two 12s in parallel to two 6s in series and don't have near the problems.

jm2cw

jt

 

[ajhbike]

How about both positives to my disconnect and then one big cable to the starter?

Both batteries are the same but I know that the batteries are or will degrade and age differently, but it is what I have

 

[Tx Jim]

big jt
I'm not flaming you but JD engineers changed from two 6 volt batteries attached in series on late model 20 series-50 series rowcrop tractors to two 12 volt batteries in parallel on 55 series rowcrop tractors. I've owned a 4255 with two 12 volt batteries attached in parallel since '93 with no major battery problems. Yes I had batteries on it fail in my 30 yrs of ownership. When I started it last yr getting ready to bale hay it started unassisted.

I definitely will not change my 4255 to two 6 volt batteries

IMHO due to lower amount of retail sales on 6 volt batteries vs 12 volt batteries I think 6 volt batteries have a shorter life span than 12 volt batteries

 

[miangus]

On my 4030 gas I connect the two positive ends to a separate relay and jump the starter solenoid at the starter with a heavy wire. This delivers maximum current to the pesky Delco relay. I have a 3020 Diesel with the original 24 volt, 2 12-volt batteries in series, a late model 4020 Diesel with the factory 12-volt system, two 6volt batteries in series and a gas 4020 with duel 12 volts in parallel. All seem to cause issues, of a different nature. It seems like with 6 batteries someone needs a battery or a battery box.

 

[ajhbike]

Forgot to post this....

 

[big jt]

I hear you on lower sales but I use Interstates. They are very good about keeping dealer inventory fresh. Means you may
have to wait a couple days but IMHO worth it. Used to swear by Deere batteries now I won't touch em. Had a couple units
that I was replacing Deere annually and the only reason I replaced with Deere was they were still under warrantee. I do
have to drive a bit to get Interstate 6V but the local former Allis dealer keeps them instock. They usually have 2 group
4's and 1 group 1, Deere dealer in my hometown has maybe 20 of each.

BTW deere was late to the party going to parallel 12s. Case did it with the 70 series, I think Gleaner did it with the F,M
and L models. Not sure when IH went to 12's, maybe 86 series?

I just personally seem to be happier with my setup of series 6 volts. Not wanting to try and convert the world just my
little corner of it LOL!

jt

 

[gomi_otaku]

So two 12s in parallel, if one fails, you still have 12v.
Two 6s in series, one fails, you don't have 12v. Which system is going to cause issues.

I put a single type 31 on mine, and use the skinny boxes as toolboxes.

 

[ajhbike]

I finally bought and installed the de-stroker screw and it works great! The only negative is that it worked out that the tee collar on the screw is in a bad position for the final 1/4 turn...I can't get my hand in there to apply force easily. Made a rough little key and that works better