Farm Power And Machinery (1+1)

Cooling system troubles

• In the engines, due to defective cooling system, several adverse effects are noticed, such as:

  1. Overheating
  2. Slow warm-up of the engine.

Over heating is mostly due to:
a. Accumulation of rust and scale in the radiator and water jacket : Rust and scale accumulate in the radiator and water jacket. They restrict the circulation of water in the passage. Due to such restriction engine is overheated. Rust is caused by the oxidation of ferrous parts of the cooling system. It has got tendency to clog water passage and to insulate the iron part from the cooling liquid. Rust can be prevented by the use of suitable protective. Scale is a hard deposit inside the water passage. It acts as a barrier to the flow of heat from the cylinder to the water.
b. Defective hose pipe : Sometimes, there is leakage in the hose pipe and consequently the water in the radiator is drained very quickly.
c. Defective thermostat : If the thermostat is stuck up in its seat due to some distortion and resulting in Slow warm-up of the engine.
d. Defective water pump : Defective water pump disturbs the circulation of water in the system. e. Loose fan belt : Loose fan belt causes slippage on the pulley and reduces effectiveness of cooling.