To adjust or not to adjust.

[Soundguy]

Are you saying you buttoned it back up but left the gauge inthe pressure test port.. lifted the lift and it read -0- again?

soundguy

 

[jinman]

With all of that said after I put every thing back and the scoop in the air I
read zero pressure again. Why?? This one is a puzzler, can anyone tell me why... The reason is a valid one and noteworthy.


Any one wanting to take a crack at it.?

Hmm. . . with everything buttoned up. . .hmm. . .

Was the gage laying on the workbench? That normally makes them read about exactly 0 psi.

 

[JC-jetro]

Are you saying you buttoned it back up but left the gauge inthe pressure test port.. lifted the lift and it read -0- again?

soundguy

Yes But I left a very minor detail.... I'll give you guys another chance and then i'll spill the beans.

JC

 

[JC-jetro]

Hmm. . . with everything buttoned up. . .hmm. . .

Was the gage laying on the workbench? That normally makes them read about exactly 0 psi.

No, but that is exactly how you start your deduction Jim, good one but not that one. I'll give you guys one chance and then reveal it.

JC,


Ps. there is nothing wrong with the gages and the lift system . They are working as they should.

 

[SPYDERLK]

The lift system is not supporting the scoop, or you have the drop snub valve tightened all the way and youve backed off the lift lever or turned tractor off.
larry

 

[JC-jetro]

The lift system is not supporting the scoop,
larry

Bingo Larry you da' man.

Now, when I did my initial test at no time the scoop was supported in any form and fashion. Th gauge initially needed some encouragement in the shape of hiting with a piece of wood to get it going. gauge had a hard time showing 200psi but did show the 1700 psi pop off right.

Right or wrong, during storage I think it is better to raise the lift as high as I can to ensure full flooding of the piston area. In my mind that keeps any potential rusting at bay. Additionally I hate to leave any "stored potential pressure" behind while not in operational use and see no reason to expose all the seals to hyd pressure as well when not needed.

So I always use a support stand to keep the lift arm extended and pressure bled off. The things that I did not consider was that the neutral position at any given point promptly by passes flow and pressure and leaving only pressure that is caused is by the weight of implement, and that weight was neutralized by my stand like the pic below.

JC,

 

[SPYDERLK]

Bingo Larry you da' man.

Now, when I did my initial test at no time the scoop was supported in any form and fashion. Th gauge initially needed some encouragement in the shape of hiting with a piece of wood to get it going. gauge had a hard time showing 200psi but did show the 1700 psi pop off right.

Right or wrong, during storage I think it is better to raise the lift as high as I can to ensure full flooding of the piston area. In my mind that keeps any potential rusting at bay. Additionally I hate to leave any "stored potential pressure" behind while not in operational use and see no reason to expose all the seals to hyd pressure as well when not needed.

So I always use a support stand to keep the lift arm extended and pressure bled off. The things that I did not consider was that the neutral position at any given point promptly by passes flow and pressure and leaving only pressure that is caused is by the weight of implement, and that weight was neutralized by my stand like the pic below.

JC,

Cool! You may want to incorporate a critical orifice into that gauge if you leave it on. Bounces while moving will work it to death elseways. Even tho fluid filled, that damps the movement, but if you spike the Bourdon tube too high you may pop it-or too often, fatigue it. Some gauges have pinhole inputs to do this. If not, I tailor one by threading an appropriate set screw into the gauge nipple. The helix flow and adjustable pathlength is nicely restrictive and slows fill of the Bourdon.
larry

 

[JC-jetro]

Cool! You may want to incorporate a critical orifice into that gauge if you leave it on. Bounces while moving will work it to death elseways. Even tho fluid filled, that damps the movement, but if you spike the Bourdon tube too high you may pop it-or too often, fatigue it. Some gauges have pinhole inputs to do this. If not, I tailor one by threading an appropriate set screw into the gauge nipple. The helix flow and adjustable pathlength is nicely restrictive and slows fill of the Bourdon.
larry

Good point Larry, The gauges that I bought do have a pin hole in in them for the exact same reason. I did not leave the gauge on as see not much use for it for my rig unless I'm investigating.


JC