Battery question (using two)

[def38]

Just a thought.
My experience on one tractor we owned, that had no preheat.
Always was slow to start in cold, and sometimes when not so cold, since new.
Bought new battery, not much help.
Bought bigger battery, not much help.
Pulled starter, had a stuck brush.
Boy, can't believe we didn't look at starter sooner.
Sure would have saved a lot of grief.

Starter service on a tractor, especially a diesel tractor, should be undertaken every couple years. There are starter services our there that will rebuild a starter cheap. Or, do it yourself. Be sure to undercut the commutator and clean the copper segments. Also, clean up the solenoid, It handles all the current used by the starter.

A good battery and a clean starter pretty much guaranty your tractor will always start.