حجم روغن ریتاردر رنو تی 480 :

مقدار 5.4 لیتر ذکر شده است (برای ریتاردر Voith RET-TH ) و تخلیه کامل 7.5 الی 9 لیتر 

RET-TH is a compact, gearbox-mounted, hydraulic retarder that effectively supplements the vehicle’s ordinary brake system. It is suited to a number of manual gearboxes as well as to I-Shift. The retarder is coordinated with the engine’s exhaust brake, which results in high overall braking power. Volvo’s most powerful engine brakes can be used, and a special function ensures that the rear axle is not overloaded. Using the additional brake as primary brake limits wear on the truck’s ordinary brakes, which reduces total operating costs. The compact retarder is very suitable for regional and long-haul transports in hilly areas. Retaining a safe driving, the average speed can be increased as the retarder makes it possible to maintain higher speeds when driving on long downgrades. This results in a considerable increase in vehicle productivity. The retarder is fitted with a cruise control function that makes it easier for the driver to maintain a constant speed when driving downhill. Since the retarder is connected to the propeller shaft, braking power is also utilised when changing gears. Engaging and regulating the retarder is carried out conveniently with a lever next to the steering wheel. The retarder should be regarded as an integrated part of the bra