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Forums13
Topics7,385
Posts40,939
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Apr 9th, 2026
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Joined: Oct 2018
Posts: 10
Hackmaster
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Hackmaster
Joined: Oct 2018
Posts: 10 |
I have a Otis Mrs w generator just put in a new hoist motor got the car runs up normal speed but slow speed in the down the generator sounds a little bogged down on the down.chexk all speed relays etc
Any help would be great
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Joined: Jan 2014
Posts: 736
old hand
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old hand
Joined: Jan 2014
Posts: 736 |
Sounds like a ground or leak in loop circuit.
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Joined: Oct 2018
Posts: 10
Hackmaster
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Hackmaster
Joined: Oct 2018
Posts: 10 |
Thanks for your quick reply I opened the the top where the connections on the genny was and it was litter w carbon dust.how can I research the leak .just send the generator out?
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Joined: Dec 2015
Posts: 1,766 Likes: 11
ElevatorPractitioner
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ElevatorPractitioner
Joined: Dec 2015
Posts: 1,766 Likes: 11 |
What was the original problem with the motor? Also make sure you are getting full field voltage to the motor. You check for leaks with a megger.
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Joined: Oct 2018
Posts: 10
Hackmaster
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Hackmaster
Joined: Oct 2018
Posts: 10 |
Orig prob w motor is that they pulled the motor due to a broken pig tail and the com was cooked.i check the MF runs constant at a standing of 40 and running around 85 in both directions.
Thanks for your reply
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Joined: May 2012
Posts: 194
member
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member
Joined: May 2012
Posts: 194 |
compounding might be screwed up,neutral might have been moved on generator..up/dn.should have a flat of 10fpm..
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Joined: Oct 2018
Posts: 10
Hackmaster
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Hackmaster
Joined: Oct 2018
Posts: 10 |
Great thanks for the help
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Joined: Dec 2015
Posts: 1,766 Likes: 11
ElevatorPractitioner
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ElevatorPractitioner
Joined: Dec 2015
Posts: 1,766 Likes: 11 |
It’s a good idea to check neutral first. Even if the motor/gen just came from a motor shop. You’d be surprised.
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Joined: Oct 2018
Posts: 10
Hackmaster
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Hackmaster
Joined: Oct 2018
Posts: 10 |
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HW PM
by Chris, January 13
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