Service manual

7. PAIR OPERATION

To raise, lower or park only a pair of wheels, turn the selector switch to PAIR at the post pair that control

is desired, while pressing the RAISE, LOWER or PARK button.

NOTE: Be sure that the set of wheels on the ground is free to move as the effective distance between the

front and rear wheels becomes less as one pair of wheels is higher or lower than the other pair. Keep the

height difference between pairs as low as practical.

NOTE: If the PAIR switch is released while the UP or DOWN button is still pressed the hoist will

operate in default ALL synchronized mode (All posts will be controlled).

LIFTING EXAMPLE:

Now that all the setup and operations instructions have been presented, an example of a typical lifting

application is shown:

A mechanic is to perform maintenance on a school bus. He drives the vehicle into the bay. He then unplugs

any power cables to the charger inlets on all of the posts to be used. He jacks each post with the pallet jack

and moves them to each of the tires in the post configuration shown in the setup diagram. Pushing the posts

firmly against the tires, he checks to ensure that the forks are slid inward as far as possible to engage the tires.

He presses the pallet jack release on each column. He then connects the communication cables and dummy

plugs to all the posts as shown in the setup diagram.

He is now ready to use the lift. He turns the main switch to “Operate Lift” and releases the E-Stop Button on

each post of the system. Once this is done, all the displays should illuminate. He reads the post

communication screen to verify that all the columns are present and accounted for on the display. He presses

the appropriate button on the screen to verify the post set-up. The lift system is now ready to operate.

The mechanic then goes to each post and presses UP and SINGLE for a short moment to engage each tire

with the forks until the spring loaded wheels of the post retract and the post feet are flattened on the floor.

(The SINGLE function is to be used for slight adjustments and to initially engage the tires ONLY). The

mechanic then presses UP and raises the vehicle to the desired height. Then the PARK button is pressed and

held until the vehicle stops on the mechanical locks.

The mechanic is now able to work on the vehicle. Once done, he presses UP to lift the vehicle off of the

mechanical locks. The DOWN button is pressed to lower the lift to the ground. If any adjustments where

made (like SINGLE or PAIR) which made the lift level vary from the floor level, the lift may experience a

fault when lowered to the floor. Pressing RESET will clear this fault and allow further lowering. Also,

reversing the adjustments by pressing SINGLE or PAIR will allow the user to lower the lift fully to the floor.

Once vehicle is fully lowered, cables are stored and posts are jacked up and pulled away.