ITEM #05739 Rev B
11
Inspection of the safety device includes verification of both the mechanical locking and
the electrical shut off in case of slack chain. The method used to check this is similar to
that used during installation to check this device. Refer to the Inspection test procedures
in the back of the Installation Manual. The easiest method is to lower the lift onto a
4”X4” block with rope attached. As the lift descends onto the block the chains will
become loose and the safety device will engage. Then, by pulling the block out with the
rope the platform will be suspended on the safety device. Check the operation of the
switch by pushing a direction switch. The lift should not operate. Of course, you have to
do this with the door closed so you have to find a way to perform the test with the lift in
normal operation. WHATEVER YOU DO, DON’T GO UNDER THE PLATFORM!
You may open the door to pull out the block and close it again to prove the operation of
the safety switch.
Inspection of landing limits:
This is a critical requirement in Genesis lifts and is often overlooked. The test mainly
pertains to the lower landing stopping location. Because of settling and wear, the
stopping positions may change. If the lift is bottoming on the lower landing, the impact
can have damaging effects on the lift especially in Leadscrew units. Check where the lift
stops loaded and unloaded. Make the necessary adjustments to the limits.
A further test on Hydraulic lifts tests proper adjustment of the chain retaining anchors. If
not properly adjusted, the lift will settle on the lower floor and open the safety switch on
the slack chain system. This must be corrected. To test for this, use the emergency
lowering system to drain the fluid from the cylinder. As the lift settles on the floor the
cylinder will come to a rest at the end of its stroke. At this point, the safety switch must
not be open. If it is, tighten the chain anchoring bolts until the switch closes. Remember
to loosen the lock nut on the anchors before adjusting them and tighten again
afterwards. Always adjust the anchors equally.
