AIR-OPERATED TAILBOARD
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An air-operated mechanism for releasing the taildoor of a tipper at the flick of a switch in the driver's cab has been introduced by Edbro Ltd. Bolton, Lancs. Designed to speed the turnround of tippers on site WOrk, it can be fitted to any normal type of body with a top-hung taildoor. The system is tapped into the air-braking supply of a truck, which is also fitted by Edbro with a pressure protection valve for safety. Air pressure via a diaphragm and linkage releases two over-centre cam locking bars against spring resistance, allowing the taildoor to open as the body tips. The over-centre cams also ensure that the taildoor cannot be unlocked inadvertently by the pressure of the load In the body. On tippers already equipped with the Edbro air-shift control for the tipping gear, the safety valve preventing a drop in the air-braking Pressure is already fitted.