I have a ford 4000 tractor and and need a battery it is smaller than a 4-D size is 17 x 7 7 To fit the tray what do I need?

I have a ford 4000 tractor and and need a battery it is smaller than a 4-D size is 17 x 7 7 To fit the tray what do I need?

You might be able to parallel a couple of motorcycle batteries but make sure you use heavy wire to handle the starting current. That is, if they fit.

You need to call a industrial supply company or ever Tractor Supply to get a part number/battery group size and a price. Then you can Google that part number and do some shopping.

Good info here - http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=ford&th=406510