FROM PUMPS AND ELECTRIC CARS

If the theater begins, as they say, with a hanger, then creating a homemade tractor that’s for sure! — with the acquisition of the power unit and main components of the transmission. I in this plan are pretty lucky. Managed to get well-preserved engine from the motor-pump MP-800Б; clutch, borrowed from the ZAZ-966; transmission from seasoned GAS-52, and the rear axle of the electric vehicle is charged EP-103K. They formed the basis of mini-tractor (MT) produced, according to the unanimous opinion of the villagers, sturdy, indispensable in the economy of the mechanical assistant.

 

Such all: land and plow, and any crop to plant, nurture, and harvest to gather-to bring, and wood to saw, water pump — please! For this design the MT provides the possibility of the PTO, the use of mounted and trailed agricultural equipment, and hydraulics, finally.

The internal combustion engine (ice), however, had a few to modify. With revision to subjected to nothing like the cooling system with forced circulation of coolant. To enter the last available in each of the two cylinders was carried out separately, and circulation is improved. For this I recommend to do the following.

 

First of all, remove the regular aluminum patrol(OK, connecting the cooling jacket of the cylinder heads of internal combustion engines. Then remove from the holes in the heads of the studs — the ones which were dismantled fasteners pipe on the engine. Then in the holes (on each head) to cut the tap M22 thread under pre-new fittings (see Fig.). Complete work on the cylinder heads that are installed in its place a new fitting durotoye connect the hoses with the radiator hose. Now all of a silencer. Not to interfere, it is simply removed. Then, departing from the lower connector 45 mm, in the jacket of each cylinder of the drill hole 15 mm. 0 don’t forget about pin holes for the water pipe. Tap cut into the MV thread, fix these pins. And crafting from STZ flanged nozzles, set last in the prepared space with the use of sealing rubber gaskets and M8 nuts. These inlets is connected to the fuel (water pump), what is it used for again durotoye hoses.

 

 

 

 

 

 

 

 

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To improve circulation holes in the head gaskets, cylinder diameter increased to 10 mm. the circulation of the coolant delivers water pump (UAZ-452). Strictly speaking, the exact place of installation of fundamental importance here is not. But it is better, apparently, to strengthen the water pump to the tide head of the second cylinder is removed, the vacuum device pumps. Is the pump belt drive from the gearbox output shaft of the internal combustion engine.

 

A number of features. In order to maximize the compaction of the layout, simplify the whole structure itself… the engine is placed ahead of the radiator, the inlet of which is mounted a tee. And the last is screwed up the gauge pointer coolant temperature. On the frame the engine is mounted on two cross members. And the launch is done by hand, from the right (facing) side of the tractor, which is located here upright arm, driven by the sharp turn it down. Moreover, the starting sector and the ratchet washer — factory, and the arm is made of half-inch segment of pipe.

 

Gear motor — probably the most complex node of the power transfer from those who will have to make. Gear, single stage, with a gear ratio of 1.0. The need to enter it into the kinematics MT (see Fig.) due to a number of reasons. And especially the fact that our mini-tractor — dual main gear. So, we need a change of direction of rotation of the shaft. There is no doubt that the absence of the kinematics of the drive (connecting directly) it would impede the PTO. In addition, it would rule out the possibility of running the engine manually using the factory trigger. A splice variant of the “directly” requires after you install the magneto in reverse. And most importantly, in addition would be loaded with the motor shaft from axial forces arising from the inclusion of a clutch.

The gear case welded. Made of 4 mm steel plate (STZ) with two tightly welded the supports of the bearings. Has a screw-top air vent and bottom drain plug. Lid with welded thereto a bearing support N9208. Located within two spur gears taken ready (gear-starting engine P-350, or SMD-62). But the hub of improvised, made of Steel 45.

 

The flywheel and clutch from the ZAZ-966. Went pretty well, fit into the design of MT. However, the heel of the releaser had had to counterbore diameter 35 mm free passage of the primary shaft of the gearbox. And for fastening the flywheel to the flange of the gearbox output shaft of the internal combustion engine — use the three bolt M14 (see Fig.).