Daewoo GC30S:
Improper Lift Operation

We have a Daewoo GC30s. The first stage will full travel to the top before the second stage begins to move upward just as it should, when there is no load on the forks. However, when lifting a load the second stage will begin to move upward almost immediately with first stage, then telescope upward to full travel. Our operators are complaining about having trouble controlling the down function of the forks when placing a load on our storage racks approx. 8-10 feet above floor level.
  • Posted 16 Feb 2018 21:36
  • Discussion started by jalm
  • Minnesota, United States
Showing items 1 - 4 of 4 results.
Thank you for the info. I have the cylinder out and will check what you suggest. I'll post an update Monday evening.
  • Posted 18 Feb 2018 21:19
  • Reply by jalm
  • Minnesota, United States
Sounds like a hydraulic mistage issue which was common with older Daewoo/Doosan freelift cylinders. if no other causes are apparent a reseal of freelift cylinder and replacement of staging/check valve in bottom of freelift cylinder piston will resolve your problem.
  • Posted 18 Feb 2018 12:43
  • Reply by tom_p
  • Alberta, Canada
Thanks for the Tip!! I,ll check them out. Appreciate the help.
  • Posted 17 Feb 2018 05:12
  • Reply by jalm
  • Minnesota, United States
That could be a bad roller bearing in the fork carriage. With no load, lift the forks about 3 feet, shut off machine, go around and lift up on the fork tips and see if the carriage is very loose in the channels.
  • Posted 17 Feb 2018 04:14
  • Reply by mrfixit
  • New York, United States

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