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cat electric forklift

i have a cat m100b electric forklift when your operating the truck and you use the forks to go up the hyd pump goes into a high rpm and the only way to get it to come down is if you turn the key off we sent it out and cat can not figure it out they said nothing is wrong with it hahahaha wrongo!!!!!!!any help would be awesome
  • Posted 4 Mar 2016 07:24
  • By matt_n
  • joined 4 Mar'16 - 3 messages
  • Massachusetts, United States
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i was thinking the samething that it was a contact somewhere that wasnt working properly thank you bbforks im gonna dive into this and fix it after its been like this for yrs and yrs
  • Posted 4 Mar 2016 23:41
  • By matt_n
  • joined 4 Mar'16 - 3 messages
  • Massachusetts, United States
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Does this truck have old school contactors in the rear counterweight? I've seen the springs in the contactor assy's get weak & the current draw across the contact tips keeps the contactors engaged after the magnetism has gone away.

I've seen dealers (IMHO) not correct issues in the hope you'll trade in older units so they can give you scrap value for your lift
  • Posted 4 Mar 2016 13:04
  • Modified 4 Mar 2016 13:06 by poster
  • By bbforks
  • joined 1 Mar'12 - 1,437 messages
  • Pennsylvania, United States
bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
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Fact of the week
The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.