Pressure testing difficulties

[skyhook]

I think I understand whats being said also,

Here's my take on it,,....
hydraulic flow is going through a pipe at a set pressure,
this pipe may have several "relief valves" along it's path,
the one that is set to open at a "lower" relief than the others is called the Master Relief,
the others are just along for the ride.
Now if they are all set "equally" ( to open at a set pressure) The term "Master" would not be used,
since they all are equal in operation.
If there is only one relief valve in the system ( from the factory with no loader etc),,
it can be refereed to as the Master relief valve, BUT, installing another relief valve in series with this
Master valve at a lower relief setting will remove it's title and now become the Master valve.
I hope I got this right,
I also now understand what the "work port reliefs do" and from my gathering on these is...
they are not adjustable.

I also see now , that it is best to set "all" relief valves equally.

 

[J_J]

Well, actually, some work port reliefs are adjustable.

Here are some adjustable work port reliefs from Prince.


A - NO RELIEF PLUG
B - SHIM ADJUSTABLE RELIEF 500-1350 PSI
C - SHIM ADJUSTABLE RELIEF 1351-1750 PSI
D - SHIM ADJUSTABLE RELIEF 1751-2200 PSI
E - SHIM ADJUSTABLE RELIEF 2201-3000 PSI
F - ADJUSTABLE RELIEF 500-1350 PSI
G - ADJUSTABLE RELIEF 1351-1750 PSI
H - ADJUSTABLE RELIEF 1751-2200 PSI
J - ADJUSTABLE RELIEF 2201-3000 PSI
K - ADJUSTABLE RELIEF 3001-3500

 

[Tx Jim]

Now if they are all set "equally" ( to open at a set pressure) The term "Master" would not be used,
since they all are equal in operation.
If there is only one relief valve in the system ( from the factory with no loader etc),,
it can be refereed to as the Master relief valve, BUT, installing another relief valve in series with this
Master valve at a lower relief setting will remove it's title and now become the Master valve.

I also see now , that it is best to set "all" relief valves equally.

skyhook
What you just stated is WHY I questioned J_J in the very beginning of this thread.
Jim

 

[J_J]

Like I have said many times.

Use the term if you want but the relevance changes.

Da** This is getting a bit much.

LET IT GO JIM.

 

[Tx Jim]

Like I have said many times.

Use the term if you want but the relevance changes.

Da** This is getting a bit much.

LET IT GO JIM.

Let what go? Correct me if I'm wrong IS NOT THIS FORUM CALLED A DISCUSSION FORUM?

 

[J_J]

But we have beat this thing to death.

You can be the winner, but I don't know what you won.

 

[Tx Jim]

J_J
I'm not striving to be the winner ! As I've previously stated I think information posted on a tractor discussion forum should be correct information. If you don't realize that some correct and incorrect information has been pointed in this thread then I'm glad I asked my original question.
Have a nice day,Jim

 

[LeeWorm]

Tx Jim and J_J

I started following this thread because I am having an issue with my Mahindra 3016 Shuttle. I have a FEL and a BH and both of them work completely fine. However, I fabricated a 4 spool remote assembly to completely control the 3pt hitch and that connects to the BH remote QC. Everything works great except until a load is place on the cylinders. I went ahead and hooked a 5K gauge into several points within my new circuit and am only reading about 300-400 psi even at PTO rpm. For the sake of expediency, here are some answers to questions that I presume you would ask:

The FEL and 3pt hitch function the same as ever.
The pressure read when the FEL functions are engaged drops to a point where it does not register
The pressure read when the 3pt hitch is engaged surges up to 2000-2200 psi
Each of the new remotes is controlled by Northman Power Solenoid Directional Control Valves
The solenoids are the closed center type

Any thoughts, advice, or help is greatly appreciated.

 

[J_J]

One thing leaped out at me and that is, that your tractor is open center hyd system.

Why are you using CC valves.

You should be using open center valves.

3016 4WD Shuttle | Mahindra

As far as reading pressure, it depends where i th eflow path yu put the gage.

If you plug the gage into the 3pt or remotes, and use the loader, the loader will use all the fluid and nothing downstream.

 

[LeeWorm]

Thanks for the quick reply.

I chose CC valves because my thoughts were that I was simply adding four valves, in parallel, into the interconnection between the P and PB that needed to be maintained when I took the BH off. Seeing as how there should always be flow through that part of the circuit between the P an PB, I didn't think that the CC would be a problem.

As far as where I was inserting the gauge to get the reading, I put the gauge on a tee right after the QC fitting and before the first DCV. If you need a more detailed schematic please let me know.