Hoist Block Spring Interact with Limit Switch

[GrimesFrank]

My company has purchased a trolley w/ 5t hoist and we've come to find out we need to raise the load an additional 6 inches. Raising the hoist/trolley assembly is not an option.

It has been suggested by our craning guys, just remove the 6 inch free length spring that encapsulates the chain just above the hook block.

Normally this spring would contact a lever arm that actuates a plunger type limit switch for upper travel.

How would the removal of this spring affect operation of the hoist? The spring is fairly stiff so I don't see it providing any critical dampening affect on the switch or the load. Any help would be appreciated.

Frank "Grimey" Grimes

 

[Tubbs23]

If you remove the spring it will lock itself and you will have to reset the contactor inside. It will happen every time you use the hoist, all the way to the top.