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Old 03-26-2020, 05:15 PM   #21 (permalink)
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I have an electric push-mower and will never go back.

I actually think I'd try an electric riding mower if I had a yard just the right size for one.

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Old 03-26-2020, 06:44 PM   #22 (permalink)
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My Kubota that was first sold in 1978 is space age compared to those things. The hydraulics are driven straight off the engine, so when you push in the clutch all the hydraulics keep going.
Makes me remember some older trucks with a front-mounted PTO which I used to see before cabovers became so prevalent in my country even at construction sites. I always disliked transmission-mounted PTOs, since they seem to have higher losses due to the internal frictions on the transmission too.
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Old 03-26-2020, 09:24 PM   #23 (permalink)
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The first thing that came to my mind was the engine IS the tractor. I see you are covering that. What makes a tractor a tractor is the engine is the frame. The name came from 'traction engine', so it's an engine that can move. Then attach stuff to said engine and do tasks. So this is a "traction motor" which is actually shortens better to tractor. The old diesel ones should be tracgens maybe.
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Old 03-26-2020, 09:26 PM   #24 (permalink)
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I have an electric push-mower and will never go back.

I actually think I'd try an electric riding mower if I had a yard just the right size for one.
Look at this bad boy
https://www.husqvarna.com/us/product...automower-awd/
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Old 03-26-2020, 09:37 PM   #25 (permalink)
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A robot mower has been on my mind for a while. All of my yards would be right-sized for one, but they sure are expensive. They would really have to be problem-free for me to drop that kind of money. At those prices, I better only have to set it up in the spring, and service/store it in the fall.

I was thinking along these lines for a larger yard:



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Old 03-27-2020, 05:30 PM   #26 (permalink)
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A robot mower has been on my mind for a while.
I'd rather leave the grass to feed some livestock
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Old 03-27-2020, 05:42 PM   #27 (permalink)
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I'd rather leave the grass to feed some livestock
My lawn could maybe support 1 small goat.

Parents sold off the sheep herd 20 years ago.
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Old 03-28-2020, 10:42 PM   #28 (permalink)
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Quote:
Originally Posted by redpoint5 View Post
A robot mower has been on my mind for a while. All of my yards would be right-sized for one, but they sure are expensive. They would really have to be problem-free for me to drop that kind of money. At those prices, I better only have to set it up in the spring, and service/store it in the fall.
A robot mower has ALSO been on my mind for a while (like maybe 20 years)

It is now possible to implement without burying a cable around your entire yard.

But I have a dilemma ... and I don't like EITHER choice
- a one-of prototype costs too much. AND it takes a lot of time.
- an off-the-shelf unit costs a bit less, but you need to pay someone to fix it since they are all very secretive about how their equipment works.

So ... I'd like to go halfway ... start with an older robomow or similar, do a bit of reverse engineering to figure out what pins need to be driven to get it moving and mowing, then add the guidance system and mapping with a PI 4 and some add-on modules. It's one of my retirement projects ...
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Old 03-29-2020, 01:05 PM   #29 (permalink)
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The International Harvester 300 Utility has a 40 HP engine and 11 gallon gas tank.

It has live hydraulics and independent PTO. The hydraulics continue to work whether or not the clutch is pushed in. The PTO is turned on and off with a lever to the right of the operators seat.

The Nissan Leaf EM57 motor is rated at 107 HP, but that's at a higher speed.
At 2,000 RPM, which is what tractors typically run at, it's about 70 HP, far more than the gas engine 40 HP.

Similar time period Farmall brand tractors used the same transmission, but the engine was NOT part of the frame. Instead, rails extended from the transmission bell housing to the tractor's front axle. I bought a pair of rails from a Farmall H tractor and will bolt them to the tractor.

Today, I cut down the frame rails to the same length as the engine, pulled the front end to about where it should go, and connected the yoke from the front axle to the tranny.

This gives me the original length of the tractor, and now lets me figure out the spacing and placement of the required EV components.









Radiator back in place.


The electric motor is sitting a little high right now, as this is just a mock-up and it's just sitting on a board across the bottom of the frame rails. The motor should sit about 4 inches lower than it is right now.
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Old 03-29-2020, 05:52 PM   #30 (permalink)
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Nice conversion project. I am curious how you plan to adapt the motor shaft to the tranny shaft. It is a non-standard spline arrangement. I tried to get sufficient interest in ordering a broach to make the coupler, but, not enough interest for me to follow through.

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