Thread: Hydraulic drive of capstan winches

Hi Norm

Can you send us a picture of the capstan?
or PM me 'wrinklearthur' on this forum ( click on Private Messages: )

I can take it from there to let you know whether it's worthwhile doing that with the hydraulics or if there is another way of powering it.

What model Land Rover and engine do you have?
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Originally Posted by wrinklearthur

Hi Norm

Can you send us a picture of the capstan?
or PM me 'wrinklearthur' on this forum ( click on Private Messages: )

I can take it from there to let you know whether it's worthwhile doing that with the hydraulics or if there is another way of powering it.

What model Land Rover and engine do you have?
.

Hi Arthur,

Thanks for the email, my vehicle is a 1964-67 series 2a, 4 cylinder petrol. As regards costings, I was hoping to pick up cheap, second hand gear on E-Bay, there seems to be quite a fair bit up for grabs. I don't know what's involved with the power take off, do I just take the cover off and fit my gear, or is there an extra bit of gear required. I'll post a photo but it's a bit awkward at the minute.

Thanks again mate,

Norm.

Originally Posted by normbourne

Accordingly I've decided on a hydraulic drive. I've found that very often the power steering pump is used to supply power to the winch motor.

There in lies the rub, how do I determine the sizes, is it rated in flow rate or pressure...?

I reckon to power the pump from the PTO.


Norm.

Pumps are rated on flow, although the ignorant often rate them on pressure; however; pressure in a hydraulic system is defined as resistance to flow.

I doubt that a power-steering pump, would have enough flow to drive a capstan winch, but any hydraulic-trained person can work it out for you using some mathematical formulae.
Which PTO are you proposing to use? If it is a centre PTO you could run the pump straight from the take-off perhaps, or drive it by belts remotely. The rear PTO would be rather awkward to use and I take it you don't want to use the crankshaft.

You will have to fit a hydraulic motor to the capstan and install a large fluid reservoir, so that the fluid doesn't overheat.

Let us know how you get on,

Cheers Charlie

pkspidermonkey@gmail.com[quote=wrinklearthur;1992937]Hi Norm

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Can you send us a picture of the capstan?
or PM me 'wrinklearthur' on this forum ( click on Private Messages: )

I can take it from there to let you know whether it's worthwhile doing that with the hydraulics or if there is another way of powering it.


Hi Arthur,
Can you please advise how to forward photo's....??

Having a bit of trouble

Norm.

Work out the hydraulic motor speed required to get the drum speed you want....the easy bit.

Work out the required torque the motor needs to produce....may be some amount of guesswork in this.

You can then size a hydraulic motor that can give the required torque at a sensible operating pressure.

The size (displacement) of this motor and the required speed will determine the flow rate required.

Pump then can be sized with reguard to the speed it will be spinning at..

When this is done, you can determine your input hp/torque required....and if the place where you are going to drive it from is up to it. This can sometimes be a shock and if its excessive, you may have to sacrifice motor speed or torque to lower it somewhat.

Yes a power steering pump would run it, but my guess is that it would be painfully slow...at best.

Originally Posted by wrinklearthur

Hi Norm

Can you send us a picture of the capstan?
or PM me 'wrinklearthur' on this forum ( click on Private Messages: )

I can take it from there to let you know whether it's worthwhile doing that with the hydraulics or if there is another way of powering it.

What model Land Rover and engine do you have?
.

Arthur,
I'm having a bit of trouble working how to post photo,s can you advise ..?

Norm.

Ive been trying to work out how to post attachments, with NO success...!


Could someone please advise on how to do it..?


Many thanks

Norm.

Hi Norm

After selecting the photo you want, the first thing is to have the size suitable for display, the width, height and quality ( measured in pixels ). 600 x 450 about 70 KB to 120 KB

To do this I use a program that is freeware called Pixsizer.
pix sizer free download

To operate, create two folders on your desktop, name the folders in a way that you only use them for a specific function, first for storing a copy of the picture with a large file and the other for the reduced picture size files.

Once you have your photo's ready, use the manage attachment function button at the bottom of the reply to thread page.

Left click on this button, the manage attachment page will open, left click on the Choose file button, select your photo file ( Front capstan.jpg ), left click the upload button.

After upload is done, then to present a large copy of the photo on your posting left click on the thumbnail link file name ( Front capstan.jpg (90.0 K ) this brings up a large view of the photo, right click on the large photo and select "copy image URL" ( http://www.aulro.com/afvb/attachment...1&d-1379820337 )

Using the insert image icon click on it, this opens a address bar and paste the link ( http://www.aulro.com/afvb/attachment...1&d-1379820337 ) into it.



Front Capstan



Rear Capstan


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