Issue link: http://read.dmtmag.com/i/103886
Maintenance matters open position and resting on the ground. When it is not possible to have the liftgate platform on the ground, the liftgate platform and mechanism should be adequately secured in its stored position using chains, overhead lifting devices or some other means to assure the safety of the service personnel. Never rely exclusively on the storage latches or hydraulic systems to secure the lifting mechanism during repair or routine maintenance. In addition, you should never work under the liftgate platform while it is in the raised position." "Many liftgate designs have multiple arms that are in motion during the platform raising, lowering, opening, and closing operations of the liftgate. The service technicians should familiarize themselves with the operation of the liftgate prior to maintenance and repair to avoid injury from potential pinch points on and around the liftgate." "Hydraulic systems can build up pressures as high as 3000 psi. Service technicians should take precautions when working around high pressure hydraulic lines to avoid injury. When loosening hydraulic fittings, a good practice is to rotate the fitting in 1/8 turn increments until fluid is just beginning to drip and then allow the pressure to be relieved. When reconnecting fittings it is a good practice to stay back from the work area as the hydraulic system is re-energized until they are sure the fittings are properly secured and not leaking." "Whenever working on liftgates (regardless of whether it's an electrical, mechanical or hydraulic repair) it is a good practice to disconnect the ground strap on the batteries to cut power to the electrical system. Do not rely on the shut off switch inside the cab of the vehicle or in the pump box. In many cases these only turn off power to the switches not the power to the pump and motor. Failure to disconnect power to the system can result in accidental activation of the liftgate, electrical burns, or damage to electrical components on the liftgate." OO / Owner operator/ February 2013 / / 42 OO0213_text2.indd 42 1/8/13 4:56 PM