EOT Cranes

That is our last resort. Thank you

First, how long has the unit been in service?? Sounds to me like you may have uneven wear on the drive wheels - I have had this situation before on a brand new crane where the wheels were not the same diamater(I guess QA really screwed that one up). Uneven wear will cause the crane to skew when in motoin. Check the diameter of the wheels, use a pi tape, if you have one, for best results. If the diameters are the same, I can't help any more.

Will do that ASAP. Thank You

Since 10 months. 3 months back the drive wheel shaft broke. We replaced the wheel shaft.

It sound like, now you've given more info, that your shaft change has something to do with the slewing of your long travel. Did you use Kone spares? Also did you check why it broke and did you check the wheel diameter?

As stated.... DO NOT attempt to rectify this, in fact I would if you can park the crane up at the far end of the bay until Kone come and sort out your problem.

However if you do use it until such time as technically competent engineers arrive, use it as little as possible, check at least twice a day for wear on the long travel wheel flanges, as they are to ONLY thing that is keeping your crane on the track.. They wear away... your crane has it's first, and last, flying lesson!!

Follow jesw55 suggestions. Anybody to make any suggestion how to fix this without being on site, is a bigger fool than you. The liabilities involved in doing our own repairs ..., lets just say, there will be new board members made up of the family members of the deceased and you'll be looking for a new job after you get out of prison in 10 or 15 years.

Please check following:-

1. Wheel span and rail span.

2. check diagonal span for both pairs of wheel.

3. Normally there should be gap of 5 mm between wheels and rails. In this wheel is there any gap between wheel and rail.

4. Is wheel Assembly proper?.

5. Please check wheel run out.

You will require experienced man to do all the above checks. So hire crane expert to help you out. "Kone" Finland is one of the big crane mfr. of the E.O.T Cranes, how such defect has developed it is surprising. May be it is fabricated in some other country by Franchisee.

Here's the link to Konecranes, http://www.konecranesusa.com/equipment/overhead-cranes from there you can go to page http://www.konecranesusa.com/crane-safety-0

In other words, contact Konecranes, replacing the motor(s) with something other than OEM that the equipment designed for could lead to a real can of worms.