Tech Tips

All Skyjack mobile elevating work platforms are equipped with a manual storage box. The weather resistant plastic box is located either on the platform or in the base control area. The manual storage box should always be in good condition – attached securely to the machine, no missing parts, and weather tight to keep the documents inside clean and dry. The box contains important documents for personnel who use the mobile elevating work platform - the ANSI Manual of Responsibilities and the Skyjack Operating Manual for that model and serial number. Current ANSI standards require both the ANSI Manual of Responsibilities and the Skyjack Operating Manual to be with the machine at all times. Some jurisdictions also require that a copy of the Certificate of Compliance to relevant ANSI and CSA standards be kept with the machine. All new Skyjack mobile elevating work platforms are shipped with these documents in the storage box.

As stated on its front cover, the ANSI Manual of Responsibilities is a compliance guide for dealers, owners, users, operators, lessors, lessees, and brokers. The manual in the storage box should be clean, complete, and legible. It must be the most current edition from ANSI, and copies are available from Skyjack's parts department and ANSI.

The Skyjack Operating Manual must be the correct manual for the model and serial number of the work platform on which it is placed. Reprints of the Skyjack Operating Manual are permitted but they must be complete, legible, and correct for the platform on which it is placed. Skyjack has the operating manuals in .pdf format and available for print on our website www.skyjack.com.

There is another manual that you may find in the storage box: the AEM Aerial Platform Safety Manual for Operating and Maintenance Personnel. This manual from the Association of Equipment Manufacturers is a generic safety manual for mobile elevating work platforms. The AEM manual can be in the storage box but it is not required by the relevant ANSI standards and it is not a substitute for either the ANSI Manual of Responsibilities or the Skyjack Operating Manual.

If you have any questions regarding your Skyjack equipment, please contact Skyjack Product Support at 1-800-275-9522 or email service@skyjack.com.

1. The new Deutz engines with the common rail-electronic injection system will not allow the starter to crank if the fuel pump does not operate. If you get a no crank situation with one of these engines, check that the fuel pump is operating.

2. All Skyjack scissor lifts and boom lifts use dedicated ground wires for all ground connections. There is no frame ground available. When testing electrical issues please remember to use the battery ground, any 00 or 02 white wires for a good ground connection.

3. When installing and calibrating a tilt switch or auto level module, the most important part of the procedure is to ensure the machine frame is level (i.e. the machine is positioned on a level surface). If the frame is not level and the switch is calibrated to that incorrect level, the tilt switch will allow the unit to elevate when outside the allowable amount of tilt on one side – unsafe

If you have any questions regarding your Skyjack Product, please contact Skyjack Product Support at 1-800-275-9522 or email service@skyjack.com for assistance.

For the Skyjack electric scissor models that use a Motor Controller – the units labeled as MC - testing to find why the pump motor will not run is more than just checking for power and ground at the pump motor terminals. The motor controller controls the ground signal and the current to the motor. Varying this current will vary the speed of the motor. In the event that the pump motor will not run, you will need to make several tests to determine if the input signals to the motor controller, the motor controller or the pump motor is at fault.

First, make sure the basic tests are completed. The batteries must be charged, power switches on, and correct operational procedures must be followed. Make sure all the terminals at the batteries, motor and motor controller are clean and tight.
Test for system voltage at the enable input terminal (19A wire) at the motor controller when operating a function. This should read between 19 and 24VDC. This circuit also powers the pump motor contactor (solenoid) so it is a good idea at this point to make sure the contactor is working. Trace and repair that circuit as needed.

Then test for a variable voltage to the speed signal input terminal (59I wire) at the motor controller. This should read between 0 to 4.8VDC when using the joystick. Trace and repair that circuit as needed.

Once these basic tests are complete, conduct the following test:

• Turn off the main power disconnect switch and remember to observe all safety precautions when working with batteries and associated power cables.
• To bypass the motor controller, disconnect M- & B- cables from the motor controller and connect them together using one of the bolts from the motor controller.
• Turn on the main power disconnect switch, activate the steer function, and observe if the pump motor runs.
  
  → If the pump motor runs, replace the motor controller.
  → If the pump motor does not run, replace the motor.

Anytime you have a question regarding your Skyjack product, please contact Skyjack Product Support at 1-800-275-9522 or service@skyjack.com.

In order to assist our customers better, we have started a new website to provide improved access to operating, service and parts manuals. The new site is techpub.skyjack.com and is accessible from our main website www.skyjack.com.

This improved site will allow our customers to open, download, and then print complete equipment manuals or specific pages very quickly. You can download the manual to your computer and print from that file using an "XPS to PDF" converter*. The manuals are updated frequently to keep the information current.

*You might be required to download this free application if your operating system does not already have it installed.