The Skyjack Vertical Mast VM and the SJIII electric scissor models that use a Motor Controller – the units labeled as MC - both use a Motor Controller to regulate the speed of the functions. These Motor Controller equipped models use the same pump motor contactor as the models without a Motor Controller – BUT with one important difference: The Motor Controller units require a suppression, or flyback diode between the coil terminals on the contactor.

Skyjack Vertical Mast Lifts, Compact and Conventional Electric Scissor Lifts, and Boom Lifts are equipped with a Tilt Switch as standard equipment. Use the information below to locate the Tilt Switch on the equipment listed. For Vertical Mast Lifts – SJ12 and SJ16 models, .... For SJIII Compact and Conventional models, ..... For Boom models, the Tilt Switch is mounted inside the base control console.

The joystick controllers used on the Skyjack SJIII Compact and Conventional scissor lifts, the SJ12/16 Mast lifts, and the Rough Terrain scissor lifts have incorporated a change to the enable circuit of the joystick. You may notice this change when you are troubleshooting the machine. Once the enable trigger is squeezed, an internal timer starts running; if a function is not operated within 7 seconds, the enable circuit is shut off and the joystick trigger must be released and depressed again to reset the enable circuit. The 7 second cut-out is used to inhibit tampering with or bypassing the enable switch with tape, a zip tie, or other means.

The pothole protection system on the Skyjack SJIII model DC electric scissor lifts is designed to reduce ground clearance and assist in the stability of an elevated aerial platform in the event the aerial platform encounters a “drop-off” or “pothole.” As with all safety devices, periodic inspection and maintenance is required to ensure the proper operation of the pothole protection device.