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Forums13
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Apr 9th, 2026
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Joined: Apr 2010
Posts: 60
journeyman
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journeyman
Joined: Apr 2010
Posts: 60 |
I have a car that out of the blue just started running at a reduced speed,only in the down direction. Runs normal just slow its really odd.We had the sur1 resistor melt and the only thing we can see that would do it would be the h relay. Any thoughts on this issue ? Also are these controllers known for a lot of issues
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Joined: Sep 2009
Posts: 404
Administrator
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Administrator
Joined: Sep 2009
Posts: 404 |
You should look at the speed relays and make sure each speed step is coming in correctly. You probably have a bad contact on one of those black Aromat relays in the back of the swing down panel. This is a very common failure. Also, meter the generator shunt field when the car is running slow and compare it to when the car is running normal speed. You will most likely find the voltage applied to the shunt field is much less when the car is running slow. Good Luck!
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Joined: Apr 2010
Posts: 60
journeyman
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journeyman
Joined: Apr 2010
Posts: 60 |
I went through all the relays relating to up/down and changed some iffy ones no change.Finally started digging into the compounding on the gen,and the generator has a configuration not even found on the diagram.Its at 3 1-4 thats over 15 turns in, The generator is shot someone even changed the neutral on it. The commutator is cut down over an 1/8 inch also ,i finally got it to run close to contract speed so thats where im at now until we pull the gen which
isnt going to happen until it blows up
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HW PM
by Chris, January 13
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