LeTourneau Cranes - Main Hook Control

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Eyas Participant Join Date: Nov 2009 Posts: 1	LeTourneau Cranes - Main Hook Control 12/14/2009 2:56 AM
	he main hook speed high and increase always Dc motor compound c6 driven by MG set replaced speed limit and tacho generator but still same problem not ok
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: leturneau crane main hook control 12/14/2009 3:08 AM
	Contact the original equipment manufacturer directly and request a service call out visit. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Emjay4119 Guru Join Date: Dec 2005 Location: Queensland Coalfields Australia. Posts: 697 Good Answers: 11	#2 Re: LeTourneau Cranes - Main Hook Control 12/15/2009 5:28 AM
	You probably have a loss of shunt field.
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leskranes Commentator Join Date: Mar 2007 Location: Tex us Posts: 57 Good Answers: 1	#3 Re: LeTourneau Cranes - Main Hook Control 12/15/2009 1:47 PM
	What is your location? Worked on similar M/G setups and can repair given enough time for research. Biggest trick is finding a "hands on" technician nearby. Check your generator field control circuit. It should have a feedback loop from the generator output to a comparator that limits the speed. Depends on the manufacturing engineering. __________________ me thinks, therefore I am - I think?
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