The present plan is to service the existing battery and put it back in - no new cells.

Thanks to you guys I've been getting an education here - I had no experience with electric lift trucks or batteries. Back when I grew apples, a bigger grower would send his harvest crew and pick my place clean in 2 days. I'd help prepare the fleet of handling equipment beforehand.

This three-wheel Yale works well stacking full bins 7 high in controlled atmosphere storage rooms - but people like the two propane trucks too - especially if the electric is stopped with codes. If a refreshed controller and battery make the Yale reliable again maybe a more serious battery upgrade will be justifiable next time.

The reman controller instructions say to calibrate steering and accelerator pedal. Steering went ok but accelerator voltage seems erratic as pedal moves. No codes. Any thoughts?

Thanks a lot for your help and knowledge - I'll report how this turns out.