Michael's 1972 Simplicity 3415H

Owner	Michael Reiss
Owner's Other EV	1997 Agco Allis ZT 14 38 Mower
Location	Portland, Oregon United States ^map
Vehicle	1972 Simplicity 3415H
Motor	Advanced DC K91-4003 Series Wound DC
Controller	Alltrax AXE 4834
Batteries	16 Powin Energy RFE-F200, 3.20 Volt, Lithium Iron Phosphate
System Voltage	48 Volts
Charger	Chargery C10325
Additional Features	Sears front loader Tiller Mowing deck
The tractor used to have an engine rpm governor (centripetal linkage to throttle). After setting rpm's for whatever work the tractor was doing, speed was mostly driven by the hydro lever position. Both of these controls are hand operated (rpm left, hydro right). This is not convenient when you have loader levers and a steering wheel to control. I added a hall effect foot throttle to the alltrax (which required a throttle map upload from their tech support and a few diodes on the input). The result is that tractor power is now foot controlled. In addition to direction and speed, the hydro drive position now modulates the relative pump speed between the drive and the loader. This gives fine control over the actual operation and you (mostly) have enough hands to use the controls together: steering, hydro lever, loader levers. You really only ever need to adjust two at once. It is unfortunate that both the hydro lever and loader controls are on the same side. I do find myself reaching across with my left to control the hydro while using the loader with the right, but it works.

1972 Simplicity 3415H Tractor