Hydraulic pressure testing

[wallacedw]

I borrowed a hyd pressure tester. Now I have to figure out how to use it. It is just the guage with the connector. In the shop manual it has a hose, guage and on/off valve.

Just with the guage do I just turn it on and see how much pressure is on that line alone? Then go through each connector?

 

[thurlow]

Mine was just a home-made one; liquid filled 3000 lb. guage (with dampener) with hydraulic hose and end to fit whatever tractor I was fooling with. Just plug it in; move the SCV lever and observe; don't know what tractor you're working with, but it'll probably read the same at each 'connector'.

 

[wallacedw]

I plugged in the guage and it is showing 1000 psi on the rear outlets. The cylinder on the back is not a quick coupler.
A psi of 1000 is right for this tractor, I have to have it at 3/4 throttle or so but it will do it. The shop manual says it should be 900+ but less than 1500.
Kinda happy because a new pump is 650... then I have to install it.

I am thinking that either the cylinder is damaged or there is a blockage in the hose/pressure/fluid box whatchamacallit.

The other thing is that the fluid that seaps out when I disconnect the guage is foamy and once was milky. The fluid was a brownish color which is different from the light golden brown that I see on the hydraulic tank dipstick.

1956 Farmall 400

 

[wallacedw]

Funny thing though is that it will max out at 1000 but sometimes can only get up to 800 or 900. Full throttle is necessary to get to 1000. Even at full throttle sometimes it will get to 1000 and sometimes obly 800 or 900. This occurs on both the lines (2 way lines). I guess that is up and down.

I want to test the cylinder but don't know how. Idea's? It is not connected with quick connects. One was kinked but I got it loose. I would think, since it does move up and down and can lift some weight, that the kink is irrelevant. Is that correct?

 

[bison]

I use 5000 psi gauge on hydr hose with whatever end i need to plug in.

on a tractor just plug it in the remote quik coupler,should have at least 2250 psi on most makes.

 

[wallacedw]

To test the main cylinder in back that raises and lowers the hitch... could I just switch the lines? Up becomes down, down becomes up... the idea being to test the cylinder. If it lifts the same bale higher then the other hose setting I narrow the field to at least one circuit?

The pump is reading 900 on the rear quick coupler although I have to 'bump' it sometimes (It goes to 750-800 aso I go to nuetral then up or down again).