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Supplying electrical power for accessaries.

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'66 4020 24 vol

05-21-2003 20:04:03




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If I tap into the wire to the key ignition switch, will the accessary electrical load be split between the two batteries or will I still drain one and fry the other one? Would be for a switch on a disc mower electric hydraulic lift solenoid Thanks for any input.




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John T

05-22-2003 06:27:21




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 Re: Supplying electrical power for accessaries. in reply to '66 4020 24 volt ?, 05-21-2003 20:04:03  
The only way youre gonna get just 12 volts on a 24 volt system is to use one of its batterys. Each is 12 volts from frame ground to its non grounded terminal, with one positive grounded and the other negative grounded. The starter motor and generator are 24 volt 2 wire devices (hooked to the non grounded battery terminals which is 24 volts) while all other loads are 12 volts (+ or - grnd) from ground to one or the other battery. While I cant say for sure not knowign the specs of the solenoid you mentioned, most typical solenoids dont draw too much current, so it shouldnt be a problem. If it were, you could install a switching device to choose from which battery you draw power.

Good Luck John T Nordhoff

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Jim B

05-22-2003 05:39:58




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 Re: Supplying electrical power for accessaries. in reply to '66 4020 24 volt ?, 05-21-2003 20:04:03  
On a 24V system on a 4020 the voltage is split at the switch.It is marked A&B,half acessories work off A and half off B.If you have trailer plug below seat you could tie in there,the switch or on either battery.Install an inline fuse or circuit breaker.One problem you might have is putting too much drain on one battery as load has to be nearly equal on both batteries or keeping batteries charged will become a problem.I ran into that one time installing a cab on a 4020 that the cab blower was 12V.Jim B

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