diff head idea

[mudlva]

following on from the GOD WINCH idea

im running a hydralic winch powered off the pto in my LC

to get the pump working fast enough i have to engage drive gear on the auto.
this means that im unable to winch and drive.

so using the idea of a diff head gearing, and the pto turning the drive axle which will then turn the pinion, this will gaive me an increase in speed,from what the pto out put is to hopefully what the pump rpm needs

so what is available either from a car or 4x4 for an indipendant suspension diff at around 3.0 to 3.5/1 ratio

the idea is to use a common dif the is not going to be too dear from pick a part or some where similar i have to watch the pennys as im allready thousands over budget as it is

mind you man has it got some power

any ideas would be appreicated

[Nivapulledout]

Sounds feasable . Will be interesting to see how you get on.

[mudlva]

yes it sounds like it could work

what i need is susgestions on what little diff head i could use

[lincooln]

Suzuki Vitara diff?

[mikee]

So why cant you winch and drive,what happens.

[UBZ]

what about using a divorced transfer case from a Suzuki SJ or similar

strong enough , in a mountable housing , selectable low and high gear option.

, High: 1.409:1 , Low: 2.268:1 for a Sj413

[mayday]

surf ifs front is 4.55:1 I think

[mudlva]

So why cant you winch and drive,what happens.

due to having to be in "drive gear" tto get the pto to spin fast enough to then turn the pump itself fast enough to generate the required flow and preasure to make the winch motor then turn.

now

when i need to winch and drive the auto move down to 1st gear this means that the pump is now turning way to slow to generate flow and presure the winch itself will hardly turn and has no power.

so

what i want to do is install a "up" gearing between the the pto out put shaft and the wincjh hydralic pump so then i will be driving the winch in 1st gear at around 1200 to 1500 prm this will then allow me to winch and drive as well as having the the torque converter fully engaged

as the pump shouldnt excede 3000rpm im looking for something that is around 3 to 1 ratio +/-.5 and this should then allow full preasure and flow and allow me to target that 1200ish motor rpm

cheers

[mudlva]

Suzuki Vitara diff?

what gear ratio is the suk diff??

[mudlva]

surf ifs front is 4.55:1 I think

4.55 is going to be way to high unfortunately

[mikee]

Talk to a hydraulic or tractor shop they have step up boxes that go on tractor pto shafts and hydraulic pump fits staight in.There are various ratios but 3.5 to 1 is common.This triples the 540 rpm to better suit a pump.Some small mods will make one fit.

[meatc]

Talk to a hydraulic or tractor shop they have step up boxes that go on tractor pto shafts and hydraulic pump fits staight in.There are various ratios but 3.5 to 1 is common.This triples the 540 rpm to better suit a pump.Some small mods will make one fit.

x2 why reinvent the wheel with hydraulics. It is simply a pump speed issue you have, change the pump, simple, easy and reliable. Problem with custom one offs is making it work as you expect and getting it reliable.

[mikee]

Step-up boxes
Specifically used to drive a hydraulic pump off a tractor PTO or power source. The primary purpose is to increase the output shaft rotation speed 3 fold.


The design carries all drive-line side load forces and provides mounting for the pump.

14 -53 input hp.

There are variations available on these units.

These are avaiable from Hydraulic Wholeslers,Brevini,Hyspecs to name a few.Just do a search.

[lincooln]

yea having a look to refresh my memory on the ratios and I think they are too high. manual trans is 5.124, auto 4.62.

so not really going to help to much. Good luck

[mudlva]

Talk to a hydraulic or tractor shop they have step up boxes that go on tractor pto shafts and hydraulic pump fits staight in.There are various ratios but 3.5 to 1 is common.This triples the 540 rpm to better suit a pump.Some small mods will make one fit.

x2 why reinvent the wheel with hydraulics. It is simply a pump speed issue you have, change the pump, simple, easy and reliable. Problem with custom one offs is making it work as you expect and getting it reliable.

cheers guys i didnt know about these step up boxes

i will be around east tamiki in the next few days and will stop off at hyspecs and see what they have got

[mudlva]

ok i went to see hyspecs today

decided to get a pump that will flow 50ltrs at 1000 rpm

will be easier and long term more reialble to change the pump to suit the pto rpm than muck around making new adapters etc to fit the step up box

will take photos when done

cheers for your input
Rohan