|Location||Leesport, Pennsylvania US map|
|Vehicle||1974 John Deere 312 |
This tractor broke its gas engine 20 years
ago and has been collecting dust in our barn
since then. We decided to revive it with
|Motor||Mars ME 0708 Permanent Magnet DC|
None. The Hydrostatic transmission governs
speed very well.
|Batteries||16, 3.20 Volt, Lithium Iron Phosphate|
Used 16 x 40 amp-hr CALB Lithium batteries. Very light and compact. Expensive but worth it. Stored
all winter (down to -5 deg F once) without battery refresher and maintained full charge
|System Voltage||48 Volts|
|Charger||Black & Decker 48 Volt Golf Cart charger|
|DC/DC Converter|| |
|Instrumentation||Battery state of charge meter.|
|Top Speed||10 MPH (16 KPH)|
Replaced 12 Hp Kohler engine. Now quicker
|Range||Still to be determined. Been towing small |
trailer for nearly an hour and still has
|Seating Capacity||Just 1 person.|
Saved 120 lbs over the gasoline version.
|Conversion Time||Worked slowly over a Fall and Winter. |
Started in August 2013. Finished in April
|Conversion Cost||This was not a cheap project. Bought all |
new and replacement parts on eBay and
Craig's List over time. Waited until there
was a sale before buying the Lithium
batteries. Otherwise its been cheaper than
a new tractor.
|This was a joint project between friends. Josh Eller did most |
of the work and I paid the bills.
The conversion was designed from the start to be a tow vehicle
with no mowing capacity (I have an 84" deck on a JD Diesel for
Has been a great tow vehicle. My wife tows the garbage can down to the end of the street with it.
Always starts. Shuts on/off easily. Virtually no noise and no