A mini-tractor, which will be the story for the third modification of my DIY construction, originally designed as walk-behind and built by me in 1985. It was the car with the power unit of the motorcycle “IZH-Planeta-4”, equipped with air cooling system and is equipped with an intermediate chain reduction gear. Tillers were intended mainly for the cultivation of the earth. For the transport of works behind him was poicephalus single axle truck with the seat and the body. Truck wheel was, of course, not leading. Reverse tillers also had and with it I felt it is not easy to handle, and realized that he largely loses the tractor.
Then the idea came to attach to the back motoblock two-wheeled cart on the principle of “breaking” the frame, equipped with steering his car type that eventually did. So tillers became a mini-tractor.
Mini-tractor had a small size, small turning radius, good traction and maneuverability on the road. And on the way he could reach the speed of 40 km/h Track front and rear wheels was 700 mm, and the wheelbase (distance between axles) is 1 m and the vehicle could pass the gate with a width of only 90 cm, i.e., at the gate.
During the years of operation the mini-tractor had no breakdowns or power of design elements, no bridges, no transmission. All faults (or rather folly) happened mainly at the engine — no spark, fuel injection, splashing the candle with oil and other, inherent in two-stroke engines.
But somehow the chance to purchase inexpensive not new, but it is a workable power unit of the motorcycle “Ural”. It’s mucking me the next — the third modification of the machine, which has already been implemented.
Mini tractor with “broken” frame:
1—the wheel (from the car “Moskvich-412”, 4 PCs.);
2—front drive axle (from the car “Moskvich-412”);
3 — kick-starter;
4—power unit (from a motorcycle “Ural”);
5— magneto (from pumps);
7—intake manifold (from a motorcycle “Ural”);
8—carb (from a motorcycle “Ural”);
9—gear shift mechanism (transmission) of the motorcycle “Ural” (lever, pull, crank);
10—air filter (from the tractor);
11 —chain transmission;
12—steering (from the car “Moskvich-412”);
13 — gearshift mechanism (the lever and pull) transmission from the car “Moskvich-412”;
16—the seat back;
17 — a node adjust the angle of the seat backrest (2 PC.);
18 — upper polustoiki seat (steel sheet s12, 2 PCs.);
19—lower polustoiki seat (steel sheet s12, 2 PCs.);
21—rear axle (from the car “Moskvich-412”);
22—rear composite driveshaft with a splined connection “Moskvich-412”);
23—swivel (front wheel of the UAZ-469);
24—universal joint transmission;
25—”tipping point” node of the half-frames;
26—rear propeller shaft;
27—hood (steel sheet s1);
28 — actuator system forced air cooling;
29—a fuel tank (tillers);
30—front wheel (steel plate s1, 2);
31 —rear wing wheel (steel sheet s 1,2 PCs.);
33—the brake pedal;
34—the clutch pedal;
35—magneto cover (the headlight from the tractor);
38—the air duct (dural sheet s1, 2)
Scheme of mini-tractors remained the same with “broken” frame. But the former “Izhevsk” motor gave way to a more powerful (and more reliable and not so whimsical) four-stroke power unit of the motorcycle “Ural”. The rear frame has another axle. He, like the front — also from the car “Moskvich-412”. Many units applied to the previous modification, as, for example, articulated (albeit with slight alterations), transmission, intermediate chain gear, the tank under the fuel and cladding. Initially left unchanged and the system forced air cooling of the motor, changing only the fan drive Yes dividing the air flow from it on two cylinders. But later, due to the low efficiency, it had also to alter the setting on the “personal” fan above each cylinder. This allows you to operate a mini-tractor under load for a long time even in hot weather.