2 #DriveLineHarmony www.jbj.co.uk/pneumatic-starters.html Pneumatic Starters Description & Operation Technical layout of pneumatic starter The starters have a modular design and comprise the following components: motor drive, engaging drive and control peripherals, which consist of the main valve and cycle valve. They can be actuated either electrically, pneumatically or manually.The maintenance-free operation of the system is achieved by lifetime lubrication of the motor rotors and bearings, Control valve Cycle valve Engaging gear unit with free-wheel Pneumatic cylinder for engagement Gear motor drive Air outlet Air inlet Flange connection as per SAE J542C Main valve making an oiler in the air feed unnecessary.If the starter pinion is retracted too late (overspeed), the free-wheel lifts off the engaging spindle and the pinions together with the engaging spindle run free without suffering any damage. Installing the pneumatic starter When a starter is attached to a diesel engine, it is essential to ensure that the dimensions for centre distance and spacing between the pinion and gear ring as specified in the brochures as well as the parallel alignment of the gearing are observed. Similarly, the cable cross-sections must not be below those prescribed, otherwise the specified performance values will not be achieved. In order to prevent damage to the gearing following an unsuccessful start, the starting procedure may only be repeated when the starter and combustion engine have come to a standstill. The PS starter is maintenance-free, i.e. it does not require an upstreamoiler or relubrication of the bearings. Use of a sound absorber reduces the noise level by approximately 12 dBA. Furthermore, noise can be decreased significantly by attaching a 2 metre exhaust hose. Fully automatic starting is achieved by installing a speed control unit, i.e. the starting procedure is stopped automatically when the ignition speed is reached.
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