Thread: Hydraulic PTO on LT230 transfer box

Originally Posted by stevo

I am running the OX winch I cannot remember what make of hydraulic motor is fitted but it is capable of handling the pressures that I have set up.

AFAIK, the Ox winches from TJM are rebagged MileMarkers. The motor is probably a "White Roller" or "Danfoss". As far as handling the pressure, I figure that would not be the motor but more importantly the winch gearbox and components. I had a quick look at the MM website and it gives the winch ratings at 1500 psi. I guess there is some in reserve but I would be very concerned running 3200 psi at the PRV

Flow = speed, pressure = pull force. So if the winch is safe rated at say 10,000lb at 1500 psi, and has the appropriate cable, fittings etc that fall into this area, what happens when you up the hyd system to 3200psi?. Most normal use the system may not be operating at that 3200psi, but what happens when you get proper stuck or caught up against something....

Originally Posted by uninformed

AFAIK, the Ox winches from TJM are rebagged MileMarkers. The motor is probably a "White Roller" or "Danfoss". As far as handling the pressure, I figure that would not be the motor but more importantly the winch gearbox and components. I had a quick look at the MM website and it gives the winch ratings at 1500 psi. I guess there is some in reserve but I would be very concerned running 3200 psi at the PRV

Flow = speed, pressure = pull force. So if the winch is safe rated at say 10,000lb at 1500 psi, and has the appropriate cable, fittings etc that fall into this area, what happens when you up the hyd system to 3200psi?. Most normal use the system may not be operating at that 3200psi, but what happens when you get proper stuck or caught up against something....

I would expect the rope unless doubled up to be the weak link

even if it was the only thing to break, not really a good idea IMO. I think that is one of the benefits of Hyd set up and the pressure relief valve. No shear pins etc to break and replace. Just a winch that stalls out and the ability to re set. Of coarse it still requires good winching practice.

The kits come with a stage 2 pump. "A 26cc hydraulic pump provides the power and flow rate to provide a impressive flow rate of 60 litres per minute at 2500rpm with pressures up to 250bar". 60 litres per minute and approx 3600psi. It looks like the kit has a pressure valve but I certainly would be looking into that.
Cost is an issue but it is still on the agenda

More information on setup and relief valves
http://www.aulro.com/afvb/technical-...tml#post602458

I just converted my "99 Defender LT 230 to a Discovery LT230 for the higher ratio. I should have taken photo's but I can confirm that the LT230 definitely has different bolt pattern PTO covers. I wanted to fit the Defender cover on the ( I think earlier) Disco LT230 & no way. Who would have thought??
I can get the serial numbers if you want, it means a crawl under the Deefer & dragging out the Disco housing from the shelf, but fact is, they are different...

DJ, actually they only go on one way; there is different spacing between 2 of the holes so you need to rotate it around a bit until all the holes line up.
as to why, i don't know, that is just how they are

jc

I'm in the process of fitting a Runva winch to DIsco 1 - slow process, as finances allow. Much much more expensive than electric winch, unless your going premium Warn electric of the same rating.

Winch with steel cable weights approx 65kg.

Fitting of the MR Automotive PTO pump required modest cutting of Disco floor panel for clearance of pump.

Check you input gear in the PTO has the dog teeth machined, which are necessary to drive the pump - should be visible to you when you take the cover plate off. Later Disco 1 seem not to have the teeth cut.

Runva requires better than 9mm thick mount plate according to instructions - after market mount plates all seemed to be about 3mm - eventually tracked down some scrap steel channel to suit.