460 PTO question
Hi guys,
I have the opportunity to buy a transfercase with PTO fitted, now I've always wanted one of these to run my hydraulic winch but don't want to shell out a grand on a new one!
The only snag I can see is that my G is a 1989 model with the VG080 transfercase and the one I will be looking at is a 1981 model which I believe is an earlier model. A quick search revealed that the PTO is non-transferable to the newer transfer case.
Question is, how will I recognise this earlier model and will it bolt into my 1989 model or is it vastly different and should I leave well alone?
As always thank you very much for your opinions
regards
Richard
Hi Kashi,
I can't help you on whether or not the '81 box will fit into your '89, but maybe on your selection choice. My question is, why do you want to drive your hydraulic winch via a PTO shaft? The reason I ask is as follows: I have a 110 LR with a PTO winch. The winch is not hydraulic but a straight shaft driven from the transfer case through to the winch housing. What I love about this winch is that it is so controllable because you can effectively 'drive' it through the gears: i.e. you have total control over your spooling speed. As far as I'm aware, in hydraulic winches, you either have a slow or fast speed (am I right or is the spooling speed also dependent on the gear you're in?). If you effectively only have the two or three speed options, I would imagine that it is more efficient just to run your hydraulic pump off your engine belts.....because, the only 'problem' I found with the PTO driveshaft is that it was vulnerable to being caught on rocks. To counter this, I had to get a good welder to fabricate a complete underbody protection plate to take any offroad hits. I don't imagine the latter would be a problem with a hydraulic PTO pump, but you might want to look where you'd locate it as I had a real issue with this on my 110. What I'm saying in a very long-winded way is that I think a hydraulic winch doesn't benefit from the 'running-through-gears' as a mechanical PTO winch does. Given this is the case, it's a much easier option to locate/maintain the pump where you can easily get to it. Good luck/Ph
p.s. out of interest, do hydraulic winches spool accordingly to the gear you're driving in?
I had a pto to run pump for milemarker. I belive the old tc will fit, but the later vg080 had an oil pump in tc for when you used the pto, you need to double check, and you can drive while using the pto, unlike a landrover set up. Select neutral, engage pto, select first gear and voilà! Do you want a better speed? increase youR pipes from 10 to 13mm on winch to allow more flow and get around a 25cc pump, or higher if you want that's plenty for your set up, minimum 5 ltr tank and oil cooler.
p.s. out of interest, do hydraulic winches spool accordingly to the gear you're driving in?
the winch speed will vary as the pump spins, so faster you rev the faster the pump will spin, up to a point, but with the G you can drive assist, with the LR set up you cant, and there is always the issue of the shear pin giving up under load.
cant help much with the tc, but ......
IMHO the only real advantage for a pto driven winch (hydro or shaft)are for situations where the vehicle is stationary,power companies pulling cables etc..... there a pain in the swiss to drive assist winch with, because every time you depress the clutch they stop working!
some guys seem to be able to balance clutch, wheel speed and winch speed , but It always gave me a pain in the arse in tricky situations......and dont every try an auto box with a pto :evil:
now if you could fit a double clutch like on big tractors :?:
No problem with an auto, drive assist is easy, done it many a time in winch challenges some years ago with my 280
No problem with an auto, drive assist is easy, done it many a time in winch challenges some years ago with my 280
tryed a pto winch in an auto 90 (not mine) and hated it!!
always having to knock the tc into neutral to get a bit of speed up, then usually having to put the auto box in neutral to get the tc back in gear! :evil:
just my experience with them, I would much sooner a well engineered chain drive from the crank for a hydro pump, but not matter how well this is built it will never have the long term reliability of a pto driven pump.
Thanks guys,
On reflection, and on budget grounds I have decided not too go ahead with this option for now. I will stick with the slow but sure belt driven pump.
Thanks for all the opinions
Kr
Richard
JOIN THE GWOA
This website and forum are provided for the benefit of enthusiasts and owners of all Mercedes Benz off road vehicles, in particular the G Wagen. The costs of development, upkeep and provision of the site are met entirely by the annual subscriptions of club members. If you are using the site and are not a member of the G Wagen Owners Association please consider joining. You will have access to areas on the site that are not open to non members, to club trips and meetings and to technical assistance. In addition your contribution (only £25 annually) will help us maintain and develop our website for future users.
Who's new
- cloudburst
- Mike242
- Brendan arroyo hondo
- WaspG
- stevessx
Thank you for the advice!
I am already running a belt driven pump which is ok, if slow. I rarely do drive assisted winching as I find the milemarker will pull it out anyway (SLOWLY)
I just like the idea of the PTO but maybe I don't really need it?
Still in negotiation with the seller but haven't been able to get the price that I want and still unsure if it is the earlier type. If it is then I don't want it because for a little more I could buy a brandnew one. If it is the later version at least I have spare!
Does that all make sense?
I don't need it, but I want it..... but only if it is the same I have now, any visual clues or serialnumbers that would help at all?
thanks
Richard