all this being said, this is the strongest hand powered tool to pull your rig out of anything. I firmly believe this. the mpp will do the job.
More Power Puller (1 Viewer)
- Thread starter Godwin
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The vendor is stating what the safe working load is for different applications (lifting vs. pulling). To determine this, they probably hook it up to a force meter, and the meter won't care whether it's being pulled vertically or horizontally. My guess is that the calculations for determining safe working load from the failure load is different for lifting vs. pulling. Also, when lifting, the weight (and force) stays on the device, as the handle is ratcheted back for the next pull. However, with a horizontal pull, the load is very small (theoretically zero) once the pull is stopped.
I know this is an old thread but seeing how it is being recently linked in other places on the forum, I thought it was worth making a couple of points as their is some obvious confusion and conflicting information.
Yes lifting and pulling are rated differently. A vertical lift rating uses a standardized 5:1 safety factor where as a horizontal pull rating uses no more then a 3.5:1 safety factor and usually a lot less then that. Basically this means that the MPP 3 ton rating is the WLL (working load limit) for vertical lifting where as the actual breaking strength is 15 ton.
So if doing a horizontal pull using the 3.5:1 safety factor and the already established 15 ton breaking strength, the WLL would be a 4.28 ton (8560lbs) static load equivalent.
However winches are not rated this way. In fact their does not seam to be a standard rating system among winch manufactures. Often its based on the weight of a vehicle on a certain degree of incline. But these numbers vary from manufacturer to manufacturer. In the MPP's case they are simply doubling (2:1) their 3 ton (6000lb) static load rating to achieve the 6 ton (12000lb) pull rating. That is a 2.5:1 safety factor on a 15 ton (30,000lb) breaking strength.
I have read that Superwinch tests and rates their winches based off of vertical pull ratings. Essentially if you take a 8000lb superwinch and divide that by 5 you will get the vertical lift of 1600lbs that they used to rate it. So yes if it can lift 1600lbs it gets a 8000lb sticker!! Then you can also subtract 10% for each wrap of line on the drum
To prove my point try lifting 3 tons (6000lbs) with your 8000lb winch. Its not going to happen. Hell I'd bet money your 12000lb winch aint going to lift it either. So the fact these MPP hand winches (Come-Alongs) are rated this high is really quite impressive
Yes lifting and pulling are rated differently. A vertical lift rating uses a standardized 5:1 safety factor where as a horizontal pull rating uses no more then a 3.5:1 safety factor and usually a lot less then that. Basically this means that the MPP 3 ton rating is the WLL (working load limit) for vertical lifting where as the actual breaking strength is 15 ton.
So if doing a horizontal pull using the 3.5:1 safety factor and the already established 15 ton breaking strength, the WLL would be a 4.28 ton (8560lbs) static load equivalent.
However winches are not rated this way. In fact their does not seam to be a standard rating system among winch manufactures. Often its based on the weight of a vehicle on a certain degree of incline. But these numbers vary from manufacturer to manufacturer. In the MPP's case they are simply doubling (2:1) their 3 ton (6000lb) static load rating to achieve the 6 ton (12000lb) pull rating. That is a 2.5:1 safety factor on a 15 ton (30,000lb) breaking strength.
I have read that Superwinch tests and rates their winches based off of vertical pull ratings. Essentially if you take a 8000lb superwinch and divide that by 5 you will get the vertical lift of 1600lbs that they used to rate it. So yes if it can lift 1600lbs it gets a 8000lb sticker!! Then you can also subtract 10% for each wrap of line on the drum
To prove my point try lifting 3 tons (6000lbs) with your 8000lb winch. Its not going to happen. Hell I'd bet money your 12000lb winch aint going to lift it either. So the fact these MPP hand winches (Come-Alongs) are rated this high is really quite impressive
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I believe in the MorePower Puller. I had a 3000 lb Puller a long time ago, and it was far more useful than my front-mounted winch. I almost never needed to pull forward - it seemed I was always pulling my truck to the rear, because I had buried the nose in a drift or plunged into a creek bottom or something like that.
I got the puller to pull me out from the rear or stabilize a cross-face traverse, hooked to the side.
The Puller and my Handyman jack (for breaking suction in boggy ground and roadbuilding beneath wheels) were a better solution than the winch.
Eventually I got rid of the electric winch (Warn 4000) and relied on the Puller and snatch-block. It was a better solution. Took a load off the front, too.
I'd still have it if somebody hadn't taken it and my box of spares......
I got the puller to pull me out from the rear or stabilize a cross-face traverse, hooked to the side.
The Puller and my Handyman jack (for breaking suction in boggy ground and roadbuilding beneath wheels) were a better solution than the winch.
Eventually I got rid of the electric winch (Warn 4000) and relied on the Puller and snatch-block. It was a better solution. Took a load off the front, too.
I'd still have it if somebody hadn't taken it and my box of spares......
made in america, and I totally agree with others these are a must have for the bag in the back, usable and handy.. worth the money..
on the 8k winch picking power, my 8k ramsey had a hard time picking up a dana 60 to move it, so 1000-1500 lbs in lifting is about the limit..
on the 8k winch picking power, my 8k ramsey had a hard time picking up a dana 60 to move it, so 1000-1500 lbs in lifting is about the limit..
I looked at the specs on the MPP on their site. It does say explicitly that the "3 ton" puller is capable of lifting 3 tons vertically DOUBLE LINE (!). IOW it can not exert a force of 3 tonforce directly on an object, single line. Only 1.5 tonforce. So if I understood correctly what they mean by doubleline, some of the numbers thrown around above may be off by a factor of 2.
(And I did look a bit into winch ratings - see other thread if interested)
(And I did look a bit into winch ratings - see other thread if interested)
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I am really glad to find out about the MPP!
Especially since it's now it can use synthetic cable.
I'll be using MM 12000lb hydraulic winches front & rear on my stretched FJ40 when it's finished.
The one concern people bring up about using hydro winches is what if vehicle is on its side & engine can't run. How do you right it?
Now I know! Easy carry & use a MPP!
I think the MPP will come in handy around camp & elsewhere also.
Cheers, Allen
Especially since it's now it can use synthetic cable.
I'll be using MM 12000lb hydraulic winches front & rear on my stretched FJ40 when it's finished.
The one concern people bring up about using hydro winches is what if vehicle is on its side & engine can't run. How do you right it?
Now I know! Easy carry & use a MPP!
I think the MPP will come in handy around camp & elsewhere also.
Cheers, Allen
you guys pushing the envelope on these things, remember to use the original handle for safety. A cheater bar around the OEM handle is fine, one replacing it is not. And what's neat is that if you bend the original, you can cut off the bent part and reuse the rest (it'll have less leverage as is, but you can still put a cheater bar on top).
Not mine, but this is an incredible craigslist sale: "3 ton with amsteel blue 12,000 lb pull rope" for $145 in Ohio! Someone there should jump on it quick!
http://athensohio.craigslist.org/grd/4689342536.html
http://athensohio.craigslist.org/grd/4689342536.html
