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Reversable hydraulic pump?

Started by Satamax, September 14, 2017, 05:45:57 AM

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Satamax

North river, to the sides, not realy possible.

French CD4 sawmill. Mecalac digger, with grapple. Self moving hydraulic boom crane. And a Brimont TL80 CSA.

mike_belben

How about a 3 or 4cylinder economy car engine with auto trans on back to power a winch direct by shaft?   Cables into cab for shifter, throttle and a parking brake to change direction and hold the cable.   

Im not sure if its really cold there but if so a gas pony motor would be a good way to preheat the diesel engine by using the same cooling system.  Could power accessory stuff easier too with all that room to locate it as you wish.  Air compressor, weldernator, etc
Praise The Lord

Satamax

Mike, calm down, you're just going crazy!  ;D

This is not a solution i would say. When the guy with the bottom PTO gets back to me. I will most certainly buy it from him. This will power the blade and log basket. And the hydraulics for the winch might even never happen. Either i fit a monstrous pump on the transfer case PTO. Or i go direct drive shafted. I'm not keen on that tho. I like the ability of going forward and reverse with the winch. In case a log gets tangled. I could fit a gearbox on that shaft. Tho, it's un necessary complication again.

Plenty of WW2 gmc winches were fitted that way in France, on tractors.
French CD4 sawmill. Mecalac digger, with grapple. Self moving hydraulic boom crane. And a Brimont TL80 CSA.

Satamax

So, back to the idea.

I have a gearbox, forward, neutral and reverse, from a cabin lift, or gondola if you prefer.

4.18 to 1, the pulley freespools and the input shaft too, when in neutral. So i have the spool's engaging and disengaging sorted. I have a huge bearing block from the snowblower's shaft. So both ends of the drum are sorted.







I will need to cut up the pulley, to make one of the spool's flanges. Find tube for the spool. Make the other side's spool of steel plate? I hope i can fit the brake caliper on that second flange.

And i have to fit the hydraulic motor, with it's sprockets to the gearbox input shaft. I don't have it at hand, so i don't remember the reduction ratio. I might have to buy another one, as the receiving sprocket is huge!  :(

But, this means i still need a high volume pump!
French CD4 sawmill. Mecalac digger, with grapple. Self moving hydraulic boom crane. And a Brimont TL80 CSA.

mike_belben

Typical planetary reduction ratios in an electric winch are 150 to 300:1    Worm gear mechanical winches are going to be atleast 40:1

Are you going to have enough reduction?   


It looks like it could work well for a capstan puller.  Which would be kinda wacky for a skidder i guess.
Praise The Lord

Satamax

Mike, thanks for your reply.

I gonna have around 16 to 1. May be a smidge more.

The hydraulic motor i can cet is rated for 625rpm max continuous speed. If it's a 160 cc omt. It's about 30kw.
Which would run at 123ft per minute. A bit slow to my liking.
French CD4 sawmill. Mecalac digger, with grapple. Self moving hydraulic boom crane. And a Brimont TL80 CSA.

mike_belben

Alright i just checked specs on a skidder winch to get a better idea of normal.  20 to 40 reduction ratio range and about 40k line pull bare drum.  Allied 400 series.  Seems like youll be pretty close
Praise The Lord

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