Another hydraulic test question - sorry

[Teikas Dad]

I posted this on someone else's thread in the Hydraulics forum but figured I'd put it here too as this may be a Kubota specific question.

I'm about to do a pressure test on my Kubota B3200 but I'm confused by something (confusing me isn't necessarily a difficult event!).

I'm going to attach the gauge to the rearmost position on the front loader connectors per the instructions from BXpanded. But, I was advised from a thread here to test the pressure with the loader working to get the true pressure relief setting. I traced my lines yesterday and the connector I'm supposed to use is the line that lifts the arms on the loader (rearmost/lower cylinders). If I disconnect that line and put the pressure gauge there then there won't be any hydraulic pressure for those lift cylinders. That means I can't try to lift anything to put the loader under maximum lift pressure. Will the system spool up to maximum pressure with just the gauge in place or should I have a T made up to allow the pressure to still operate the cylinders while I'm testing?

And, carrying the thought one step further. If I need a T in the line to properly measure the pressure, is it a bad thing if I leave the T and the gauge installed all the time? I'm thinking of making a bracket to hold the gauge that way I would have a live pressure gauge all the time.

 

[ericm979]

If you plug the gauge in in directly and operate the loader you will deadhead the system, triggering the relief. If you want to know the relief pressure that's how to do it.

Putting the gauge on a tee will tell you how much pressure is in the cylinder. It would be the same as the deadhead relief pressure only when you are trying to lift weight that is greater than the loader's capacity.

 

[RickB]

If you plug the gauge in in directly and operate the loader you will deadhead the system, triggering the relief. If you want to know the relief pressure that's how to do it.

Putting the gauge on a tee will tell you how much pressure is in the cylinder. It would be the same as the deadhead relief pressure only when you are trying to lift weight that is greater than the loader's capacity.

Or when the cylinders are fully extended or retracted.

 

[Teikas Dad]

Thanks for the info!

 

[Tractor Seabee]

I posted this on someone else's thread in the Hydraulics forum but figured I'd put it here too as this may be a Kubota specific question.

And, carrying the thought one step further. If I need a T in the line to properly measure the pressure, is it a bad thing if I leave the T and the gauge installed all the time? I'm thinking of making a bracket to hold the gauge that way I would have a live pressure gauge all the time.

For full time pressure reading you need the gauge in a tee mounted in a Power circuit line. For that runs some 1/4" hydraulic tubing to a dash mounted gauge.

Eric below added what I omitted in my last about the tee install; you have to load the system to the relief opening to get an accurate lift point reading.

Ron

 

[Fallon]

If the T is a restriction, it will cause you problems. But unless you undersize it compared to the rest of the plumbing it wont be any different that adding a couple inches of hose. Less restriction than adding a 3rd function, which us done all the time.

The gauge itself could be a weak point & I wouldnt want it close to me (do yourself a favor & DONT Google hydraulic injection injuries or the ensuing gangrene). There shouldn't be an issue as long as it's not too close.