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Conversion of Oliver 1800 using Nissan LEAF components

4576 Views 30 Replies 4 Participants Last post by  darko
It's been a slow moving project, but making enough progress now to post an update. When I joined the forum I was looking for a tractor to convert using a salvage '15 leaf I bought (see my initial posting). Since then, I bought a 1964 Oliver 1800 with a seized engine to be the recipient.

I chose the Oliver because the engine is not part of the frame/structure, and the size is big enough to run my drum mower and hopefully have enough room for the LEAF batteries.

This tractor has a 2-speed "hydro power" between the engine and transmission that has a self contained hydraulically activated clutch pack that allows shifting on-the fly. I'm not sure if will try to use that device or leave it out. It is a lot of extra complexity and a power-sink. I'm trying to figure out a design for a clutch and perhaps that hydro-clutch might factor in.

Here are some photos of the tractor (being dissembled):
Tire Wheel Automotive tire Tractor Plant

Wheel Tire Sky Land vehicle Vehicle

Wheel Tire Green Automotive tire Motor vehicle
Wheel Tire Green Automotive tire Motor vehicle

And the hydro-power unit I mentioned:

Grass Plant Motor vehicle Gas Automotive wheel system

The live PTO shaft extends all the way through the hydro-power unit into the engine flywheel - which makes for a very long shaft to work with. The hydro-power connects to the transmission using a chain coupler - which is hard to see in the picture, but is right up against the transmission. I had to remove the steering column to get access to that coupler. Nothing on this tractor is light-weight, and the hoist had to be used for even that. The "grill" was solid cast iron and must have weighed 300lbs.

My plan is to use the LEAF motor and gearbox in-tact, weld the spider gear and use one side of the drive shaft to run a v-belt pulley (5 belts) to increase the speed to the typical ICE RPM range. I may tear into that hydro-power and see if removing the jack-shaft will allow it to be used as a fancy clutch such that it is either engaged for free-spinning.

I have yet to start pulling the LEAF apart - it only has side impact damage and is "driveable". Pains me to take it apart.

If you have any ideas for the clutch/pulley design let me know.
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The servicing disconnect is rarely used by first responders.
Ground wires, or negative returns to the HV battery?
What does the wiring diagram say as far as their routing?

It's extremely common to run power to one side of a load and to ground the other side to turn it on.
Did you do a full PID for the control? Are you sensing torque at all?
The PID tuning details might be useful to those following in your footsteps - if you have time to write about it here.
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