Outer Limits 4x4 Board

I picked up a new TJM hyd ox winch(milemaker) yesterday that i swapped for my old bullbar and after having a quick look at it last night i was wondering if anyone that has used one of these winches could answer a few queries.

The idea will be to jam 3 6hp motors on 24v into it using a highmount brake, the input ratio will be set by the motor/brake gears and could start from 1:1 upto whatever to get the best overall results.

The question is,will the gearbox handle it....

By the looks of things, both actuation shafts require an air cyl with a 10mm stroke which would give you high/low and free spool.

Has any one blown a gearbox to pieces on one of these things or any info on how badly you've treated,shock loaded,or just generally abused it would be great.

Cheers Smitty

Smitty,

on the face of it I think you are barking up the wrong tree!

Why are you trying to convert a hydraulic winch to electric?
The gearbox ratio for a start is going to give you problems as the Ox/Milemarker is 6:1 ratio, and the electric motors need to spin at high revs thru big reduction boxes to get the torque.

I have a hydraulic Milemarker, 12000lb and it works great as configured.

I think you are on a 'hiding to nothing' with this idea. For a start, 18HP thru 6:1 reduction - what load rating are chasing? Also, I doubt the gears will be rated for these input loads - they are pretty skinny from memory.

I would look into it a bit deeper and do some calsc first to see what the limitations are before cutting any metal.

I have not abused mine so cannot comment about durability.

If its anything like the milemarker winches Tjm brought in about a year ago be very carefull as they were all recalled for missing parts in gearbox and such

Like PBBIZ2, I dont know if your headed in the right direction as the gearing for the milemarker hydraulic is not really suited to low torque electric motors?
However, for your info, here is a link to a landrover forum that has a pic by pic rebuild of a milemarker hydraulic. Also shows a cracked endplate caused by the cable bunching up when spooling (apparently a fault on earlier milemarkers). But in general i'm led to believe they are reasonably strong and many have been modified to take higher loads/speeds.
http://forums.lr4x4.com/index.php?showtopic=25692
Not sure if you have to sign up to view pics, if you have trouble, PM me.

FWIW if you do decide to go a different route I'm looking for a hydraulic MM for a little project.

Cheers.
Dan

Cheers guys, i'm out on shift so wont be able to have a closer look for a couple of weeks but thats the kind of info i was after.

As for the ratios, i honestly havent even looked that far yet as i wanted to see what kind of abuse guys have given their winch gear boxs but the info and link is greatly appreciated.

cheers smitty

those winches are capable of flowing 60ltr/min all day and have been set up with pumps flowing as much as 120-140ltr/min.......that will produce serious line speed.......your PS only flows about 5ltr/min

as to the OP. Yes the gearbox will take it, as it is essentially just the final stage of an electric left. The winch rating stay the same therefore the input power is constant, and the only variable is the gearing/reduction to achieve the same mechanical output power of the drive system. You will find the thru shaft is HUGE compared to an electric with its 6mm hex drive. Realistically MOST winchs usually only have 2-3.5HP of INPUT power from the motor. EG a ~6hp electric motor (INPUT POWER) only has ~2.7-3.2HP OUTPUT power.