Bobcat 873 BICS locking machine up

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BobcatDoug

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Joined
Dec 19, 2020
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3
Brakes and Hydraulics lock-up while in use. When this happens, all the lights on the BICS are blinking. Release button will not release breaks until key turned off and machine restarted. New break soleniod, soleniod bar, and break relay have been installed and the issue still happens.
 
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BobcatDoug

New member
Joined
Dec 19, 2020
Messages
3
I solved the problem. I went out to troubleshoot the machine some more and noticed that the voltage gage was spiking up around 18 volts. I restarted the machine a few times and watched both the BICS display and the voltage gage. Whenever the voltage rose above 17 volts the BICS would start flashing and lock everything up. Bad voltage regulator. I tried to buy just the regulator but out of stock and had to be shipped from the factory so I just grabbed a new alternator and threw it in. Voltage now stable around 14.5 volts and no more problems with the BICS unit locking up the brakes and hydraulics. I guess those units can't handle unstable voltage.
 
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