Anyone run a hyd pump w/ a 12V clutch?

[john_bud]

Why not just use a second power steering pump? They put out about the correct amount of pressure, good flow and are cheap at the bone yard. When not used, there isn't much power loss.

jb

 

[ArTrvlr]

Yes, the Surpcntr clutches have tapered bores, and that is a problem. I
suspect that AC comp clutches may have tapered bores, too.

I know the Barnes pump can put out plenty of pressure. The question I had
relates to what pressure you are running with that pump. If your relief is
set too high, I would think the clutch or belt(s) will slip. Esp if the clutch
can only handle 75 ft-lbs before slipping.

The tapered bore clutch could be adapted to a straight shaft pump with a machined sleeve... IF the shaft is the same size or smaller than the smallest part of the taper.
jp

 

[dfkrug]

Why not just use a second power steering pump? They put out about the correct amount of pressure, good flow and are cheap at the bone yard. When not used, there isn't much power loss.

JB, I have considered an always-on hyd pump (see above). Have you used
one? I have heard a typical PS pump from a car delivers less than 1500psi,
and it has a tiny reservoir, indicating a very low flow. Probably less than
1 GPM. It does not take a lot of volume or pressure to turn the wheels on
a small car apparently.

If I go with an always-on pump, I can probably do it more effectively and
enonomically with a small hyd pump with pulley. As for getting an OEM
PS pump anyway, these are rare and popular items, as Samauri fans
know.

 

[J_J]

I thought of another system you could use. The electro/hydraulic pump from a boat motor , the one that raises the motor out of the water. It is a very small unit. I have one sitting around somewhere, and it powered a cylinder on a grader to raise and lower the wheels.

 

[groundcover]

Not sure it would be handy for your app. but I had a belt driven Fisher pump on my '86 F250 that had a cap bolt that you could take out in the off season so the pulley spun on the shaft but the pump didn't turn.

 

[J0be269]

Not sure it would be handy for your app. but I had a belt driven Fisher pump on my '86 F250 that had a cap bolt that you could take out in the off season so the pulley spun on the shaft but the pump didn't turn.

That seems like it would wear the shaft down extremely quickly

 

[dfkrug]

I thought of another system you could use. The electro/hydraulic pump from a boat motor , the one that raises the motor out of the water. It is a very small unit. I have one sitting around somewhere, and it powered a cylinder on a grader to raise and lower the wheels.

I have seen a number of marine 12V power packs on Ebay, like those from
RayMarine, but they are pricey and many seen to top out at 750 psi. I do
like the snow plow and TommyLift power packs that come up, as well as the
Surpcntr units, but I am not quite ready to shell out $200 or more, AND I
have some concerns about the huge current needed for some of these
units at full output pressure. I still may end up going that way.

Intersting idea about pulling a pin to disengage the pump of a belt-driven
system. I have not heard of that.

 

[john_bud]

I helped a buddy make a dump bed on a ford bronco. He used a PS pump. Pressure is about 1500 psi and flow is pretty high in the 3-4 gpm range. If you want more, change he pulley ratios. Don't think you have to use a suzi-Q pump. Get one off an old 3/4 ton truck or 1 ton. Cheap.

Come to think of it, the teensy tiny pump on the sami may be 7-800 psi and 1 gpm, but a big ol truck is a horse of a different color! Especially on a diesel truck where the engine alone is #1000 pounds.


jb

 

[dfkrug]

I helped a buddy make a dump bed on a ford bronco. He used a PS pump. Pressure is about 1500 psi and flow is pretty high in the 3-4 gpm range. If you want more, change he pulley ratios. Don't think you have to use a suzi-Q pump. Get one off an old 3/4 ton truck or 1 ton. Cheap.

Good point. Maybe I will try one of those bigger PS pumps. Some look
like they can hold at least a gallon in their reservoirs, too.

 

[CCWKen]

75ft/lbs. of torque in a clutch is one heck of a lot of capacity. I don't know why you're concerned with that. That's well over 20hp and if your pump needs more than that, I think you'll need a bigger engine just to turn the pump.