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Electric golf carts Harley Davidson, Melex, Pargo, Taylor-Dunn and other Misc. Carts. |
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10-15-2015, 08:29 AM | #1 |
Not Yet Wild
Join Date: Oct 2015
Posts: 2
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Troubleshooting/testing an electric motor
I've got a 1975 Cushman 898110 cart, and am trying to see if the motor works.
I've got continuity (~.5 ohms) between A1&A2, and between S1&S2. I tried hooking the motor up to a 12V battery by shorting S1&A2, hooking S2 to the positive terminal and A1 to the negative. However, I just got arcing where I made the connections and the motor didn't spin. Have I made some error in my connections, or is there something wrong with my motor? Can any further testing be done? |
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10-15-2015, 08:54 AM | #2 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: Troubleshooting/testing an electric motor
There will be arcing as the motor will immediately draw all available amperage when a direct connection is made. Use a battery disconnect switch to make the final connection, see pic.
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10-15-2015, 09:07 AM | #3 |
Not Yet Wild
Join Date: Oct 2015
Posts: 2
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Re: Troubleshooting/testing an electric motor
That makes sense, thanks!
According to your link, the motor must be attached to the differential for safety reasons. Is it really necessary to present a load to the motor in this sort of test, or if I bolt the thing down and make sure nothing wraps around the output shaft is that sufficient? Again, thanks for the help. |
10-15-2015, 08:49 PM | #4 |
Gone Wild
Join Date: Mar 2012
Location: Katy, Tx
Posts: 1,027
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Re: Troubleshooting/testing an electric motor
The recommendation is leave it connected to the transaxle.
Fyi i got the spark and heat on an old motor = seized bearing in that motor. Replaced bearing and all was well. |
10-15-2015, 10:44 PM | #5 |
Guest
Posts: n/a
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Re: Troubleshooting/testing an electric motor
this is a must as there is no support for armature when out of trans-axle.
it wil self destruct if "bench tested" if scottyb's is not clear here is one we made a few years ago scotty is correct that a battery disconnect switch should be used motor test WARNING you don't want to make a big spark anywhere near the battery. jumper cables may be used black clip on battery negative, red clip on motor A1 post, tap the other ends together |
10-15-2015, 10:50 PM | #6 |
Gone Wild
Join Date: Apr 2014
Location: Oregon City, Or
Posts: 1,977
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Re: Troubleshooting/testing an electric motor
Without the diff. attached, the end of the armature has no support. If the motor is fired up in that condition, you will be in the market for a new motor.
(CTD beat me to it, darn hunt and peck typing) . |
10-15-2015, 10:57 PM | #7 |
Guest
Posts: n/a
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Re: Troubleshooting/testing an electric motor
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