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Old 02-13-2010, 02:53 PM   #1
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i just got a free 1 hp motor to run my grain mill along with a reversing switch from a defunct motor.
i marked the wires from the old motor with corresponding numbers on the switch wires.
the 1 hp motor was just wired to a plug and runs counter clockwise when facing shaft. - i need it to run clockwise. there is a centrifugal switch inside i can see and hear that activates shortly after motor starts running. its a leland type r55 110/220 -maybe not reversible?
which wires do i attach where?
on the old motor wires marked 2 and 3 are white and 1 and 4 are black.
on the 1 hp motor the black wire was with the checkered red/white wire(lhs on photo) and the greenish wire was with yellowish wire(rhs on photo) note the yellowish wire is really red when i checked inside the motor.
i don't want to wreck the motor or switch by doing it wrong
thanks for any advice.
edit: i hooked up wire 4 from the switch to the black wire on 1 hp motor and wire 3 from switch to yellowish(really red) wire on 1 hp motor and the motor runs counterclockwise when facing motor when switch is set on reverse.
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Last edited by rod; 02-13-2010 at 07:45 PM. Reason: update
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Old 02-14-2010, 08:54 PM   #2
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ok - thanks for looking but since i and now one else can seem to figure this out i mounted the motor facing the otherway and ran a shaft back to the drive gear on the mill so problem solved.

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Old 02-15-2010, 03:03 AM   #3
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sorry I didn't see this sooner. though you have it worked out I'll drop a little info in cqase you or some one else runs into it again.

There are 2 pairs of wires, one is for the drive power. This is what provides the motor the power to do all the work.

The problem with single phase motors is they won't start turning on their own. They need a circuit to shift the phase a bit to got the motor going. This is the starter circuit. Once it gets up to a couple of rpms the switch you mentioned disconnects it.

Depending on which way you bias the starter circuit determines which way the motor will spin.

To identify the main drive power attach power to just 2 of the 4 wires, when the motor doesnt run until you spin the shaft and spins up in that direction you've found it. The other 2 wires are the start circuit.

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Old 02-15-2010, 02:14 PM   #4
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thanks for the info - from googling i realized there was a start and run circuit but i did not know how to differentiate.
so when i hooked up 2 wires and the motor ran i guess i found the start circuit?
do you know if this type of motor can run in reverse without damage?

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Old 02-15-2010, 02:57 PM   #5
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Direction wouldn't be an issue. If it were designed to go only one way the start circuit would have been tied to the power for the run circuit.

If you just wired the start circuit and not the run circuit the motor would turn VERY slowly and would have no umph to it.

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Old 02-15-2010, 06:52 PM   #6
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ok- thanks - it turned fairly quick but i did not try putting a load on it.
since i don't really need it to run in reverse i may just leave well enough alone.
thanks again for your help

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Old 02-15-2010, 08:08 PM   #7
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Meter the pairs of windings you'll find the run windings like 10 times higher in resistance than the starting windings. Caution you do not want to run the motor more than 5-8 seconds on the starting windings they will overheat and burn up beside should pop your circuit breaker or fuse what ever the protection you have on that circuit feeding it. This with bypassing the centrifugal contact switch inside the motor.
That Westinghouse motor should have a plate with a 120 or 230 volt wiring circuit on it with it being over 1/2 hp. 3/4 on up most have dual voltage wiring options. Worse case is take the model number to locate on line the proper wiring diagram of it. You'll be surprised what's still available in information even with Westinghouse directly. That dog must be 60 to 70 years old take care of it it will outlast all of us. Older high starting load motors could be repulsion start induction run vs induction start and run, the first mentioned will kick a compressor even with head pressure still on it. What's the roller diameter and length? Shoots the hell out of these new mills still using bushing bearings.

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Old 02-15-2010, 09:33 PM   #8
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i tried googling the make and model number - no luck on wiring diagrams.
burning up the motor is why i will probably leave well enough alone since i don't have a meter to test the windings.

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Old 02-16-2010, 02:25 AM   #9
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Check with a motor shop especially one that has been around for 40 yesars or longer these old timers would have you squared away within seconds. Filp them $10 or a 6 pack they'll be happy to help you out.

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Old 02-16-2010, 04:16 AM   #10
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Quote:
Originally Posted by BrewBeemer View Post
Check with a motor shop especially one that has been around for 40 yesars or longer these old timers would have you squared away within seconds. Filp them $10 or a 6 pack they'll be happy to help you out.
Dont build em like that any more do they Beemer? Thing looks like some one tried to bury it and has enough umph to chew threw grain.
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"self, going to work on Monday is like knowing you're going to get kicked in the nuts. You just don't know when or by who"
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