Hydraulic pressure check

[J_J]

Use a tee at the pump OUT port and a 3000 psi hyd gage.

The gage will show any hyd pressure and can be used for setting relief valves and trouble shooting.

1959 Ford 641

Hydraulics:
Capacity: 2 gal [7.6 L]
Total flow: 4 gpm [15.1 lpm]

 

[Soundguy]

Please lookup the application before giving advice.

Out and in 'ports' on a 00/01/000 4 cyl machine, as well as the naa, are hard connected via a plumping manifold and flange connection. The user has absolutely NO access to the ports!

A valve can be left in under the seat or on the pump to observe working pressures and relief, if the lift is loaded or stalled.

AND, the relief is not user set able, is tamper sealed shut, and is it installed an inaccessible above a cover on the underside of the tractor at the center section near the oil plumbing lines.

Other than replacement, the relief is not a user serviceable part for all intents and purposes.

 

[Soundguy]

https://www.google.com/search?q=for...RD%2BNAA%2BJUBILEE%2BHYDRAULIC%2BPUMP;225;169


Pump

Then manifold

 

[Soundguy]

ford 600 hydraulic manifold - Google Search






The manifold

 

[MitchellB]

Recently on my 861D I was able to install an Ebay hydraulic pump gauge (goes to 5000 lbs) elbowed from the plug in the top of my Hydraulic pump and left it there permanently. I haven't tried to test the relief valve by chaining the lift arms to the axle, but when lifting my 6' scrape blade the pressure ran up to about 400-500 lbs and dropped down to almost 0 when the lift stopped moving. I figure that is about the weight of the blade. When I do run into something heavy or unmovable, I plan to just keep an eye on the gauge from the tractor seat and observe how much pressure it really will lift and when the relief valve kicks in. I'm not sure what pressure the relief valve opens, but I know it is supposed to be under 3000 lbs. for mine tractor.

 

[Soundguy]

Most at pressures for tractors are under 2500 psi, which is why I reccomended a 3000 psi gauge to show good resolution.

With no book in front of me I'd guess open is around 2250 and cracking a bit less.

 

[bobsphotos]

Thanks for all the advice. I will try to get it checked this weekend.
Bob W