Diy compact tractor

[chaffe]

Hi all, well it's time for another agricultural project. Have been gathering bits over the past few weeks, the plan is to make a Kubota b6000 sized tractor, I have most of the bits and plan the get started (and finished of course) very soon.
In the line up is a lister petter LT1 single cylinder diesel, 7hp @3000rpm. A very early Volvo rwd gearbox, a landrover rear axle (to be narrowed) 4.7:1 diff. Landrover rear rims with dumper tyres, vw front wheels, Volvo steering box and a HILO 9gpm hydraulic pump. Also have a 40" cutter deck to mount somewhere. Pics to follow

 

[Chopperhed]

Cool, can't wait to see it.

 

[chaffe]

I have a few progress pics from the weekend:

 

[Xfaxman]

Interesting. :thumbsup:

 

[chaffe]

 

[chaffe]

The idea will be to have a lay shaft to the side of the engine, as shown where the pulley sits just now, this will be 1:1 ratio, two a section belts act as the clutch. My hilo oil pump will be driven off the front of the lay shaft via a coupling, the middle of lay shaft will drive an 8t chain sprocket for connection with the gearbox input shaft, onto a 50t sprocket giving 6.2:1 reduction. The box ratios vary from 3.25:1 to 1:1, through a narrowed rear axle at a ratio of 4.7:1.
30" outside dia rear wheels will provide the drive, giving a usable working speed range of 2-7 mph flat chat at 3000rpm, less with less revs.
Hydraulics will be driven at a usable speed and provide ample flow and pressure with the Hilo pump designed to run at 3600rpm on a 5.5 hp engine.
I plan on running a front mount mower deck (1.2m wide) off a separate petrol engine for simplicity's sake.
Planning on making a small backhoe once this tractor is finished, I have most of the parts for it already

 

[chaffe]

If anyone has some advice on slippy belt clutches that would be great, ie how much slack to give them and how much tension they need etc?

 

[ptsg]

I have the LD1 model of Lister and I love hear it running. Looking forward for more news. Good luck with your project :thumbsup:

 

[chaffe]

Yeah you can't beat a claggy single cylinder diesel working hard!
Some more parts came today, 8t sprocket, and chain to suit. Just need 50t sprocket now to get on

 

[ptsg]

I was planning to use it for my homemade backhoe, but it took some big proportions, and I decided to use a Kubota D650.

 

[chaffe]

Lay shaft turned and slid into place

 

[chaffe]

 

[chaffe]

Just lots of bits just now, will hopefully come together over the next week or so

 

[Xfaxman]

Progress is progress.

How about the clutch?

 

[GPintheMitten]

Following along. Very interesting.

Where are you located?

 

[Norm W]

Just a thought, keep your clutch, transmission, and the light duty parts at the highest rpm possible. Do your speed reduction with your heaviest components. If you notice in most tractors, the transmission is run at engine speed with heavy "Bull" gears carrying the high torque to the rear wheels.

 

[chaffe]

Progress is progress.

How about the clutch?

Using the twin belts as a clutch like a ride on mower

 

[chaffe]

Following along. Very interesting.

Where are you located?

There is no drawings just ideas in my head and the idea to make it similar proportions to a Kubota b6000, I am in Scotland

 

[chaffe]

Just a thought, keep your clutch, transmission, and the light duty parts at the highest rpm possible. Do your speed reduction with your heaviest components. If you notice in most tractors, the transmission is run at engine speed with heavy "Bull" gears carrying the high torque to the rear wheels.

Thanks for the advice, I had already given that some thought, the belts are running engine speed on good sized pulleys, thus keeping them at the lowest torque and highest speed. The only downfall is that my hydraulic pump will be clutched

 

[chaffe]

Some work on narrowing the rear axle today: