SINOTRUK HOWO Light Truck YUCHAI ENGINE POLY V-Belt YC80-AV 22-11 05B

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SINOTRUK HOWO light truck YUCHAI ENGINE POLY V-Belt YC80-AV 22-11 05B

FUNCTION

1. Vehicle Power Supply and Energy Conversion: During truck operation, onboard instrumentation, headlights, windshield wipers, and various Electronic Control Units (ECUs) consume substantial electrical energy. When the engine is running, it drives the internal magnetic field of the alternator to rotate at speeds reaching thousands of revolutions per minute, continuously generating electricity to power the entire vehicle while simultaneously recharging the vehicle's high-capacity battery.
2. Brake Air Pressure and Safety Assurance: Heavy-duty trucks utilize air brake systems; without sufficient air pressure within the storage tanks, the vehicle faces the critical peril of a complete loss of braking capability. The system continuously compresses air and pumps it into the air reservoirs, maintaining the truck's regulatory-compliant brake pressure to ensure that the air brakes respond with absolute safety and sensitivity whenever the driver applies the pedal.
3. Active Engine Cooling Circulation: When a diesel engine operates under heavy loads-such as climbing steep grades-or travels at high speeds, internal combustion temperatures soar to extreme levels. Driven by a belt, the water pump rotates at high velocity to force a rapid, high-volume circulation of coolant between the engine block and the front-mounted radiator, thereby swiftly dissipating the core heat generated within the engine.
4. Engine Compartment Forced Air Cooling and Silicone Oil Fan Drive: In addition to the liquid cooling cycle, the radiator's surface requires powerful airflow convection to rapidly dissipate the surging heat. The cooling fan rotates to generate a strong inward suction force, forcibly drawing cool ambient air through the radiator fins to facilitate effective heat exchange.

DETAILS

How to Determine When Replacement Is Necessary?
1. Deep Cracks: If lateral cracks appear on the rubber teeth at the base of the belt, or if the rubber surface begins to peel away-exposing the internal white tension cords-the belt must be replaced immediately.
2. Slippage and Squealing: If a continuous, high-pitched squealing sound emanates from the engine bay while the truck is idling or when the accelerator is suddenly depressed, it indicates that the belt has worn down and stretched, or that insufficient tension is causing it to slip against the pulleys. Prolonged slippage can lead to a failure in alternator output (causing the battery warning light on the dashboard to illuminate) or cause the engine to overheat and boil over.

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