Hydraulic pump question

[Marko]

I appreciate it is a long shot but does anyone know what the two screw fittings on top of the pump might be for?

[Marko]

This time with the photos. Sorry.

[wisecobandit]

Blind guess to help bleed the system?

[Breezeblock]

What is it fitted to it could be ls adjustment or swash minimum or max or maybe even a relief valve

[Marko]

The pump is fastened to a 8 horse 3 phase motor. It was originally fitted to a large guillotine for cutting wads of paper.

[treequip]

Its likely that the "Allen" screw is holding the swash plate. The slotted head looks like a cover, possibly for an adjustment screw.

[Breezeblock]

I would reckon then it will be a gear or a vane type pump and that will be the relief valve adjustment

[Marko]

And that is the question... has it got an internal pressure relief system? If I put a feed to a log splitter from the pump and drop the return back into the reservoir it should be ok? I know a tractor has a pressure relief valve in its back end so nothing silly can happen and I really didn't want to power this up without one. Is it better to put in a separate pressure relief just to be sure?

[treequip]

That's unlikely to be a PR system and even if it were you shouldn't need it. Presumably you are going to connect this pump to a direction control valve on the splitter?

 

If that's the case the valve will have a PR valve built into it, well it ought to have anyhow. Lets see a picture of the valve to be sure

[treequip]

Here is picture of a valve block I trawled off the web

 

The shiny bit looking this way from the valve body is a pressure relief valve, yours may look a little different but it will be something like this.