Designing a Corvair Custom Hydraulic Tractor

[CorvairGuy]

Ladia,

Thanks for the info and the pictures of the hub on the combine.

Could you, or anyone else with the knowledge; help me understand the brake and wheel hub unit in his picture?

I see it mounts to the flat stock with 11 studs/nuts.

Correct me if I'm wrong - when it mounts to the flat stock - using the 11 studs - it also seals that part of the hub?

Or is there more that goes on there? (i.e. a missing gasket in the picture and a seal around the shaft in the middle)

As for the shafts that goes inward - What is it for?

Why does it go back inward?

What else bolts to it and seals it?

IF it is the drive sourse - Then how does the wheel mount on the other side, facing down?

Also what drives the inward shaft?

a) - Hydraulic Motor?

b) - Another shaft from something?

If they might be an option - What do you think one weighs?

Sorry so many questions. I'm not able to be around farm equipment to find out on my own. Plus all the time lost if I were to try to find one around here and learn on my own.


Have a great day everyone!
I have to run out to the farm property and check the gates. The property is in another town and with 154 acres it takes a while. ATVers keep cutting my locks and tearing up the property. And here I thought "we ALL learned as kids - if it is NOT yours - don't mess with it!" As a joke - maybe even to drive the point home to them as well - I love to know who they are and go to their house and dig up their front yard to use their sod to replace what they damaged of ours. :laughing: ROFLMBO

 

[Don87]

I have to run out to the farm property and check the gates. The property is in another town and with 154 acres it takes a while. ATVers keep cutting my locks and tearing up the property. And here I thought "we ALL learned as kids - if it is NOT yours - don't mess with it!" As a joke - maybe even to drive the point home to them as well - I love to know who they are and go to their house and dig up their front yard to use their sod to replace what they damaged of ours. :laughing: ROFLMBO

Tony

I tried asking the 4 wheeler guys to stay off my property, but the responce was: Here in Pa., you are not permitted to 'fence off or obstruct an active 4 wheeler trail.
So I told him to spread the word that there will be boards loaded with nails on the property.
They've never been back.

 

[CorvairGuy]

I ended up liking what I had typed - that I had to make it my signature before I left for the farm.

LOL


Good Day ALL!!

 

[Redneck in training]

Ladia,

Thanks for the info and the pictures of the hub on the combine.

Could you, or anyone else with the knowledge; help me understand the brake and wheel hub unit in his picture?

I see it mounts to the flat stock with 11 studs/nuts.

Correct me if I'm wrong - when it mounts to the flat stock - using the 11 studs - it also seals that part of the hub?

Or is there more that goes on there? (i.e. a missing gasket in the picture and a seal around the shaft in the middle)

As for the shafts that goes inward - What is it for?

Why does it go back inward?

What else bolts to it and seals it?

IF it is the drive sourse - Then how does the wheel mount on the other side, facing down?

Also what drives the inward shaft?

a) - Hydraulic Motor?

b) - Another shaft from something?

If they might be an option - What do you think one weighs?

Sorry so many questions. I'm not able to be around farm equipment to find out on my own. Plus all the time lost if I were to try to find one around here and learn on my own.


Have a great day everyone!
I have to run out to the farm property and check the gates. The property is in another town and with 154 acres it takes a while. ATVers keep cutting my locks and tearing up the property. And here I thought "we ALL learned as kids - if it is NOT yours - don't mess with it!" As a joke - maybe even to drive the point home to them as well - I love to know who they are and go to their house and dig up their front yard to use their sod to replace what they damaged of ours. :laughing: ROFLMBO

The big thing is reduction gear that is bolted to the frame by those 11 studs. The hole you see is normally covered by a cover bolted to the housing. There are two bearings on each side of the big gear tensioned by a flat round part bolted to the end of the shaft by two bolts. The bolts got broken when the combine drove to a deep hole while combining at night causing the wheel to wobble and leak oil. The small shaft pointing inside is connected to the pinion gear and is connected to the hydraulic motor by about foot long shaft. Shaft of the hydraulic motor is visible sticking from the combine frame. The small round housing is the brake that is bolted to the reduction gear over the pinion shaft.

 

[Redneck in training]

Cruise controls make for a very rudimentary and only semi-effective speed control. It's difficult to explain, (and probably understand), but for a cruise control to work effectively, it would need to be much more responsive than it is. When set up for whatever car or light truck application it's in, it has parameters built-in that don't simply allow it to try and maintain a constant speed via monitoring rpm, it also tries to do so within a set of "behavior" parameters. How quickly it recognizes and responds to changes, how quickly it actually changes the throttle positioning, (both in throttling up and down), etc. are some of the variables considered.

Back in my first governor post, I mentioned how the electronic governors we use, (one manufacturer being Precision Governors), do not have a "one size fits all" model for spark ignition engines. They have several models. Each of those models has a "range" it's designed to operate in, once the application is made known to the manufacturer. Then they build the governor and ship them out to the end-user with a set of instructions as to adjusting it. It's pretty rare to take one out of the box and install it without having to tune it's performance via the trimpots. One setting that pretty much always needs tweaking is the "gain" setting. Too much gain one way causes the engine to bog because it isn't responding quickly enough, and too much gain the other way causes a lot of surging under smaller changes in engine load, because it's responding too quickly, overshooting it's target, then backing off....and then undershooting, etc.

It would be just as rare to install a simple cruise control and have it provide the functionality you're looking for. The problem there lies in the fact that you can't open up the back of the cruise control and tune it in for your particular application. You're stuck with whatever it dishes out.

I work for a company that makes speed governors. In fact I am the one that makes them work with particular machine. There is only one problem: They cost 26000 USD a piece plus, engineering plus 200 USD/hour to start up and tune them. Needles to say they are used on machines ranging in size from a single car garage to a house size that typically cost many millions. Can I get one cheap with employee discount? No. lol
I still think that cruise could work. I agree that it might not work well during unsteady condition though. The gain could be adjusted to some degree by mechanical means at the linkage from servo to the throttle.

 

[CorvairGuy]

Cruise controls make for a very rudimentary and only semi-effective speed control. It's difficult to explain, (and probably understand), but for a cruise control to work effectively, it would need to be much more responsive than it is. When set up for whatever car or light truck application it's in, it has parameters built-in that don't simply allow it to try and maintain a constant speed via monitoring rpm, it also tries to do so within a set of "behavior" parameters. How quickly it recognizes and responds to changes, how quickly it actually changes the throttle positioning, (both in throttling up and down), etc. are some of the variables considered.

Back in my first governor post, I mentioned how the electronic governors we use, (one manufacturer being Precision Governors), do not have a "one size fits all" model for spark ignition engines. They have several models. Each of those models has a "range" it's designed to operate in, once the application is made known to the manufacturer. Then they build the governor and ship them out to the end-user with a set of instructions as to adjusting it. It's pretty rare to take one out of the box and install it without having to tune it's performance via the trimpots. One setting that pretty much always needs tweaking is the "gain" setting. Too much gain one way causes the engine to bog because it isn't responding quickly enough, and too much gain the other way causes a lot of surging under smaller changes in engine load, because it's responding too quickly, overshooting it's target, then backing off....and then undershooting, etc.

It would be just as rare to install a simple cruise control and have it provide the functionality you're looking for. The problem there lies in the fact that you can't open up the back of the cruise control and tune it in for your particular application. You're stuck with whatever it dishes out.

Sears had a cruise control in the 80's that allowed you to make at least two different adjustments. The only reason I know this, is because I installed one in my 1966 Mercury Parklane..

Not that I'm going that route - I'll have to see whats out there - just to see if it is still available or one llike it..

Tony

 

[CorvairGuy]

Thanks again Ladia.

BTW - I started putting feelers out today with some friends who have contacts that I don't.

I told them what I was looking for. One guy told me they just got rid of a nice tractor with a blown engine = I'm a day late and a dollar short - yet again. lol

Asking them also gave me an idea. Yes - the light went on - but is anyone really home, that is the question. I think not - I'm usally out to lunch. :laughing:

The idea was - to ask the guys at the local dumps and the one junk yard - to call me if anything like it comes in. I give them some $$$ if I find what I'm looking for..


Tony

 

[hernando]

check out ebay,,,,i saw a tractor on there yesterday made from a corvair,,,i think bidding ends today ,,,it looked good,,,bruce

 

[Redneck in training]

Here it is

 

[MossRoad]

Just a reminder that due to scams, etc... no direct links to e-bay allowed.

Just go to e-bay and search for corvair tractor.