Genie GTH-1544 Service And Repair Manual

Also see for GTH-1544: Maintenance manual

Contents

Genie GTH-1544 Service And Repair Manual Manual pdf 26 page image

3-2 GTH-1544 Part No. 1272857September 2016Section 3 • Repair ProceduresBoom Components1-1Boom Proximity SwitchThe boom angle switch is a proximity switch.This switch functions by sensing a change in itselectromagnetic field when a metal object entersthis field. A proximity switch is simply a metaldetector.The switch generates an electromagnetic fieldwhich is radiated out from the switch face. Thisfield senses when the metal approaches theswitch and when it moves away from it, which ishow the switch contacts open and close.This switch is of a fail-safe design. Should theswitch or the switch wire circuit be faulty, themachine will not function outside its designedrange of use.The boom proximity switch is a component of thedrive circuit and the chassis sway circuit. Both thedrive and the chassis sway functions are disabledwhen the boom is raised to 50° or higher.How to Test The BoomProximity Switch1 Remove the switch from the machine. Do notdisconnect the switch wire harness from themachine.2 Start the engine.3 Move the switch away from any ferrous ormetallic object.Result: The light of the limit switch assembly isnot illuminated.4 Move the switch close to any ferrous or metallicobject.Result: The light of the proximity switchassembly turns on. The switch is functioningcorrectly.