Fig. 4.129. Scheme of the cooling system of the engine: I \cooling system one heater; II \the cooling system with two heaters and the electric pump (for motor vans with two rows of seats and buses); 1 — a drain faucet of the cooling system; 2 — a heater faucet; 3 — the electric pump of system of heating; 4 — a radiator of an additional heater; 5 — a heater radiator; 6 — the taking-away heater radiator hose; 7 — an inlet pipe; 8 — the thermostat; 9 — the sensor of a temperature condition of the engine; 10 — the sensor of the index of temperature of cooling liquid; 11 — the sensor of emergency temperature of cooling liquid; 12 — a radiator; 13 — a drain stopper of a radiator; 14 — the fan; 15 — the pump of cooling liquid; 16 — a tee; 17 — a tee stopper

The cooling system of ZMZ-4061,-4063 engines (fig. 4.129) is generally similar to the cooling system of ZMZ-4025,-4026 engines.

Differences are following:

- heating of an inlet pipe is provided;

- on the case of the thermostat the sensor 9 of a temperature condition of the engine and the sensor 11 of emergency temperature of cooling liquid are in addition installed.

Fig. 4.130. Pump of cooling liquid: 1 — a nave; 2 — the case; 3 — a clamp; 4 — an epiploon; 5 — a krylchatka; 6 — a control opening for an exit of cooling liquid; 7 — the roller with the bearing

The pump of cooling liquid (fig. 4.130) — centrifugal type. It is located and fixed on a chain cover. The roller with the bearing 7 is separated from cooling liquid by the self-tightened epiploon of the 4th non-demountable design in which the cuff and the condensing washer are located. The liquid filtering through an epiploon does not get to the bearing, and follows outside through a control opening 6 which periodically should be cleaned. The bearing refrains from movement by a clamp 3 which will be wrapped against the stop and закернен. The bearing is filled with lubricant at assembly, in use addition of lubricant is not required. A nave 1 and a krylchatka 5 napressovana on the bearing roller.

Fig. 4.131. Scheme of a tension of a belt of the drive of units: And = 15 mm; 1 — a pulley of a bent shaft; 2 — a tension roller; 3 — a bolt of fastening of a tension roller; 4 — poliklinovy a belt; 5 — a generator pulley; 6 — a bolt of movement of a tension roller; 7 — a pulley of the pump of cooling liquid

The pulley of the pump and fan is given to rotation together with a generator pulley a poliklinovy belt from a pulley of a bent shaft. The tension of a belt is made by change of provision of a tension roller (fig. 4.131).

The fan — plastic, six-blade, is installed on a pump drive pulley nave via the carving plug with the left carving of M24u1.