Tilting battery pack
OwnerMichael Reiss
Owner's Other EV1997 Agco Allis ZT 14 38 Mower
LocationPortland, Oregon United States map
Vehicle1972 Simplicity 3415H
MotorAdvanced DC K91-4003 Series Wound DC
ControllerAlltrax AXE 4834
Batteries16 Powin Energy RFE-F200, 3.20 Volt, Lithium Iron Phosphate
System Voltage48 Volts
Charger Chargery C10325
Additional FeaturesSears front loader
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.

code by jerry