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post #1 of 11 Old 05-20-2010, 07:59 PM Thread Starter
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Winch wiring question

I have a MileMarker SC9500-C winch that I want to run upside down. Can I just swap the F1 and F2 wires to run backwards (In of the "bottom" of the winch)? Will it be as powerful?
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post #2 of 11 Old 05-21-2010, 11:20 AM
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Swapping the field wires should make the motor run in reverse. And should maintain full H.P.

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post #3 of 11 Old 05-21-2010, 11:26 AM
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Why cant you just run it as is? The wire will just be wound upsidedown is that an issue?
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post #4 of 11 Old 05-21-2010, 04:23 PM Thread Starter
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Quote:
Originally Posted by JK-Ford View Post
Swapping the field wires should make the motor run in reverse. And should maintain full H.P.
Thanks. I knew it would make it run in reverse, but was unsure of full H.P. Appreciate the response.

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Originally Posted by beedle4 View Post
Why cant you just run it as is? The wire will just be wound upsidedown is that an issue?
I could, but the way my roller fairlead sits, it winds on better.
Thanks for the input.
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post #5 of 11 Old 05-21-2010, 06:26 PM
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You could just unspool the cable and let it flip itself and wrap the opposite way. This would keep the wiring correct and the controller directions correct.
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post #6 of 11 Old 05-21-2010, 08:35 PM
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you are also going to run into a lot more drum heat running backwards. The drum heats up a WHOLE lot more while spooling out on a winch. Since you will be running it backwards, might want to check into that.

Here is from ShockWorks website

What about heat from the winch drum? Heat is generated in planetary winch drums (Warn laydown-style, Ramsey planetary winches, most Superwinches) only under "Power-Out" condition. This type of use drives the winch motor against the brake (note references by winch companies about "Automatic Load-Holding Brake"). This is similar to driving your vehicle with the parking brake engaged. Doing so will generate heat if you were to use it extensively in this mode. Similar to driving your vehicle with the parking brake engaged, you can drive out of a parking space without causing problems, but if you drove for significant distance, you would quickly wear out the brake. The same is true for your winch. The "Power-Out" function should be used for relieving tension on the rope, not for extended distances, nor for lowering a load--4WD winches are not designed to be used as hoists. Our testing has shown that powering out for 10-20 feet is not a problem, but will cause excessive wear to the winch brake, so we recommend using the "Power-Out" to relieve tension only. No winches currently made, if used correctly, will heat the drum on "Power-In" use.

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Last edited by Jscwerve; 05-21-2010 at 08:37 PM.
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post #7 of 11 Old 05-21-2010, 10:09 PM Thread Starter
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Thanks guys. This helps a lot. I didn't know about the brake being used in the "spool out" mode vs not in "spool in". I may have it running correctly, but with going upside down, everything gets screwy in my head.

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Whatcha think?
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post #8 of 11 Old 05-21-2010, 10:28 PM
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If your cable is wound the same as it was from the factory it should be fine. If you switched the wires around you will prematurely wear out your brake because while you are spooling in the drum will be turning in the way it was intended to spool in, creating heat, premature failure, falling down a mountain to a premature death, etc.

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post #9 of 11 Old 05-22-2010, 04:24 PM Thread Starter
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In that pic it is wound backwards. I need to un-spool it, change the wires, and re-spool. Didn't think about the brake when I did it. Just need to take the time...
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post #10 of 11 Old 05-23-2010, 05:12 PM
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can you post some pics of your install? I have a winch (from a donor vehicle) and may do EXACTLY what you've done until I save the cheddar to get an aftermarket bumper.

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post #11 of 11 Old 05-23-2010, 08:30 PM Thread Starter
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Unfortunately, I didn't take any pics while doing the install. I got a universal winch mounting plate from Harbor Freight ($40), turned it upside down, cut to fit. Then cut the "bumper liner" and bumper to fit around the fair-lead, and put it all together. I got the idea from:
http://www.jk-forum.com/showthread.p...factory-bumper
I'm not a fabricator, so it took me 3 good days work.
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