Log splitter question

[J_J]

If the gage is teed in the IN port, it will indicate any pressure the log splitter is producing. Load pressure, return pressure, kick off pressure, relief pressure, etc.

Load is what determined pressure. You might see no pressure or very little pressure with no load or light load.

Here is an inexpensive 3000 psi hyd gage.

http://www.surpluscenter.com/item.asp?item=21-1044&catname=hydraulic

 

[wdchyd]

Right ow, and all of these posts, the gauge is in a tee that goes to the closed end of the cylinder. It never moves until the ram engages an obstacle.

That's typical.....You'll only read the pressure (load) while splitting or at the end of stroke

 

[Eyecatcher]

OK, I replumbed the hydraulics so the tee is directly at the output of the pump. I only read pressure at the end of the stroke. I again adjusted the unloader valve to 3 point, all the way in, all the way out and mid point. No change. If the control valve were too small to handle the pump volume, wouldn't show up as a restriction and indicate pressure on the gauge as I now have it plumbed? For some reason, I think one section of the pump is not turning. I have the original parts brakdown that came with the pump, and both sections are on a common shaft, but the larger set of gears is driven by a drive pin. I suppose something is borken internally. I hesitate to dis-assemble it, because as it is, it's slow, but we can still use it. Unless one of you guys who have been giving all this good advice can garner something from what I've written in this post, I'm gonna go ahead and look for a 16gpm pump and the mount to bolt it to the Honda 8 hp.

 

[cropduster69]

what is the difference between a "control valve" and a "directional" "control valve". regardless of the number of spools

thanks.

 

[J_J]

It is just a play on words.

A control valve can do lots of things.

If you look at this page, right side middle, Surplus Hydraulics shows a list of control valves.

Surplus Center - Hydraulic Cylinders Pumps Motors

 

[Eyecatcher]

Well, it's back to the drawing board. I've got a brand new GX240 Honda that my son brought home from the oil fields. Said it had never been used, was part of a pump that was defective out of the box, and it was destined for the dumpster. He put it down in the barn, and I never paid it much attention until today, thought I'd see if it ran, then use it on the log splitter. Started first pull - ain't Hondas wonderful? Only problem, it has a gear reduction on it, must be made for a mud mixer or something like that, output is ccw, and 600 rpm wide open. Oh well.

 

[LD1]

Can you take the gear reducer unit off??

 

[J_J]

I would have figured you would fix or replace the 2 stage pump.

A new 2 stage pump for the log splitter is only about $129.

Surplus Center - 11 GPM 2 STAGE HYD PUMP S21202-5292

Honda engine $337

http://www.surpluscenter.com/item.asp?item=28-1131&catname=engines

 

[Eyecatcher]

The gear reduction can't be removed, the crankshaft is only a stub with a mounted gear on the output end. I really wanted to gain the speed of the 16 gal pump, and figured if I had a new 8hp Honda just setting there, it would be a fantastic match up. I may go ahead and pull the pump apart and see if I can find anything wrong internally. Being 70 miles south of Jax, we don't need a massive amount of heat, but we do burn the fireplace amost all winter since we have a big supply of firewood, and it saves on the electric bill. I'm gonna have a knee replaced right after thanksgiving, so if I'm gonna have the splitter available for the girls to use while I'm laid up, I'm gonna have to get on the stick.

 

[cropduster69]

It is just a play on words.

A control valve can do lots of things.

If you look at this page, right side middle, Surplus Hydraulics shows a list of control valves.

Surplus Center - Hydraulic Cylinders Pumps Motors

Hey JJ, thanks for the reply, I was thinking as much, a play on words. For a log splitter that would utilize a "wood lift", what size cylinder would you recommend? and thanks in advance.