HOW KNIGHT LOCK WORKS
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TRAILERS: Stops a thief from coupling the red line from the unit to the trailer, thereby preventing its removal, The system consists of two parts: a female adaptor replaces the existing coupling on the trailer. This can only be accessed using a Knight Lock key which incorporates standard C Type coupling. Each unique access key can only be used with a particular trailer. The huge range of computer-designed pegs and locking pins, together with variable options on the depth and interior thickness of each access key coupling, results in thousands of possible lock combinations. It costs £1 85 (ex-VAT).
RIGIDS/TRACTORS WITH SPRING PARKING BRAKES: In this application the Knight Lock uses the vehicle's own inherently "safe" air brake system. After parking up he vehicle at night, the driver removes the Knight Lock access key, sited between the compressor and the four-way valve (or equivalent). Air is then vented out of the brake system, either by applying the handbrake or via a tap built into the system. With no air the spring park brakes remain on, preventing vehicle from moving. To move his truck the driver replaces the access key, allowing air from compressor back into the braking system and releasing the brakes. A thief without a key would need at least four hours to beat the system, says Haynes. Like the trailer version, the rigid/tractor lock has a huge variety of locking pin and barrel width/depth combinations. It costs £200 (ex-VAT), FITTING: Most hauliers should be capable of fitting the system, but Knight Lock, Econocruise or Pirtek will fit it on demand. Knight Lock does not interfere with main air-brake system being fitted between the compressor and the non-return valve, and it does not count as a VTG I 0 notifiable alteration.