Cooling system
1 - a pipe for draining liquid from the heater radiator and carburetor to the coolant pump; 2 - a pipe for draining hot liquid from the cylinder head to the heater radiator; 3 - thermostat bypass hose; 4 - outlet branch pipe of the cooling jacket; 5 – the inlet hose of a radiator; 6 - expansion tank; 7 – cooling jacket; 8 - radiator cap; 9 - radiator; 10 - fan casing; 11 - fan; 12 - a pulley for a fan drive and a coolant pump; 13 - outlet hose of the radiator; 14 - pump drive belt; 15 - pump; 16 - hose for supplying coolant to the pump; 17 - thermostat;
The arrows indicate the direction of fluid movement.
Cooling system - liquid, closed type, with forced circulation of liquid, with an expansion tank.
Attention! It is recommended to check the coolant level on a cold engine, since when heated, its volume increases, and in a warm engine, the liquid level can rise significantly.
The coolant pump is centrifugal type, driven from the crankshaft pulley by a V-belt 14.
Fan 11 has a plastic four-bladed impeller mounted on the hub of the coolant pump pulley.
Thermostat 17 with a solid temperature-sensitive filler has a main 9 (see fig. Thermostat) and additional 2 valves. Beginning of opening of the main valve at a coolant temperature of 77–86°C, the stroke of the main valve is at least 6 mm.
Radiator - vertical, tubular-lamellar, with two rows of tubes and tinned steel plates. In the plug 8 of the filler neck there are inlet and outlet valves.