Increasing Hydraulic pressure

Hi,
I"m new to Yesterday"s Tractor (so bear with me).

I have an IH 706 (gas) with dual hydraulics. I"m trying to install a snow blower (3 ft tall x 6 ft wide). My current hydraulics spin the snow blower blade, but not fast enough to "throw" the snow. I know the blower works (auger turns faster and throws snow) when increase hydraulic pressure is applied.

How do I increase the hydralic pressure in my current 706.

thanks,
Ron

There is a possible change of internal pump to (I think) 17gpm (may require other changes as well), or put a PTO driven hpgh capacity (volume) pump on the tractor. It is volume that makes speed, pressure that makes force to keep it moving in heavy wet snow. Get the specifications from the manufacturer to assure the correct pump. JimN

Increasing the pressure won't actually help your problem. You need to increase the flow rate and there are two ways to do that, increase the speed your pump turns at (more revs) or install a bigger pump (probably not possible). Increasing the pressure will only increase the amount of force that the "blade" can exert against the snow.

I'm not quite sure what you're trying to accomplish but most snowblowers I've seen use the PTO to accomplish the bulk of the work and the remotes are only used to angle the shute etc. Good luck, Sam

Can you convert the blower to run directly off your pto?

thank-you for the assistance,

can anyone direct me to where I can locate a used "larger pump" (hydraulic replacement or PTO driven).

thanks,
Ron

being a heavy equipment mechanic, I think that you will pay more for a larger pump and still may not work and have a lot of modifications to do than just buying a pto driven snowblower that runs at 540 rpm and mounts on the 3 point hitch so you could use the existing hydraulic system for the rotation and the angle of the chute as well as lifting and lowering the implement. when you play with hydraulics it does not comes cheap and you have to understand hydraulics pretty well to have it functionning like it should

just my two cents, guyzoo

We do not know for sure what pump is in the tractor now. We have no idea what capacity is needed by the plow.
Many Farm stores carry PTO pumps, and components. None will carry a larger displacement internal pump. CaseIH dealer will be the place to go for the internal pump. (or a salvage yard for IH. Hydraulic specialty shops are also a good source of information and safety! JimN

I have just finished a phone conversation with the Manufacturer of the snow blower (Loftness) and this model requires approx 15 gpm.

My pump is a 9 gpm.

The Internet shows many sources for 17 gpm pumps.

When converting from 9 gpm to a 17 gpm, is there anything else that I must purchase or do?

This is not convertible to a PTO driven (no manufacturers kit; it would have to be custom designed). Eventually I plan on replacing bucket of front end loader with this blower.

thanks for all the help guys,

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15GPM is probably the manufacturer's MINIMUM requirement. I don't think 17GPM is going to be enough. You really should get a PTO pump that does at least 20GPM, maybe 25-30GPM...

GPM without pressure is about as useful as pressure without GPM. You need both to make a hydraulic system work. You could have a pump that makes 50GPM at 1000PSI, but if the blower requires 15GPM at 3000PSI, it still won't work.

The parts catalog shows that you have either the 12gpm, or the 17gpm pump. The 9gpm pump is the MCV pump. The book also mentions that if pressure exceeds 2250 psi, damage may occur to the pump. The excessive pressure MAY be caused by a malfunctioning pressure relief valve, OR by installing the 17gpm pump where originally a 12gpm was used. I do not know any more details.

I have a 12gpm. $125.00 plus shiping

Ron, I guess you still need to find out from the manufacturer what pressure is needed. Volume to turn faster but without enough pressure, it will still slow down in snow. If you pull into a snow bank and it doesn't turn fast enough to blow snow, it could still be a pressure issue as well as a volume issue.

Where are you at that you are blowing snow now?

Your tractor should have dual pumps with the main pump putting out 12 or 17 gpm. A brand new 12 gpm ought to put enough out to blow some snow. However the pressure is limited by the popoff valves on your tractor. Probably 1600 psi, some are at 1800, and you could put in or have a 2200. I think most of the IH pumps are max rated around 2250 or 2500 so the popoff has to be lower.

A lot of this new hydaulic stuff anymore seems to be rated at 3000 psi which is why you need to call the mfr again. The rating should be on a plate on the hyd motor as well.

You also need to flow rate and check the pressures on your tractor. A worn out 12 gpm pump may be only putting out 6 gpm. Perhaps a new one may do it depending upon your pressure and the required pressure. How fast does your loader and other stuff work that runs off that pump. Are you tied in to the larger pump and not the 7 or 9 gpm one that comes off the steering?

With a new 17 gpm ($400-$500)it would help to get an adaptor plate ($50)(I think mkirsh knows where to get them) and use the large hyd filter($20). Then spend another 100 plus bucks for a higher rated pop off valve. I would think the mfr could tell you if it would work at 12 or 17 gpm if you can give them a pressure as well.

If your pump is worn anyway, then you may as well get a new 17 assuming you can make the pressures work. Or look for a used pto hydraulic pump and I don't know what they price out at or even if you can find a good one.

The same principles apply to a hydraulic post hole digger. The more volume, the faster it will turn. The more pressure, the more power it has to turn in hard ground. Auger speed isn't critical in drilling post holes though.

Let us know how it goes.

I replaced my worn 12 gpm with a 17 gpm on my Farmall 504 diesel. It make my front loader JUMP when asked to. I bought it off EBAY from Marhalls Tractor for about $300. I plumbed in a power-beyond valve bank for the loader set to 2000 psi. The OEM relief for the factory remotes is still 1650 psi. I installed a gauge in the plumbing for the loader valve so I can monitor the PSI. I also bought an upgraded filter kit from Allied Precision. That was the best $50 or so I have spent in a while.

Here is the link...

http://www.allied-precision.com/27336.htm

Here is the home page for Allied Precision

http://www.allied-precision.com/

CT