Tore my pump apart.. nothing visibly wrong.. which pump to buy now?

[blkcloud]

Ok, your pump will only create enough pressure to overcome the load it's presented. So my assumption is when your oil gets hot and thins out the cylinder is allowing fluid to flow past it. This allows the pump to create flow with out building any pressure. The only other way this would happen is if the valve was failing and allowing fluid to flow through it but since you show 0 psi in neutral I doubt that is the problem. Is the cylinder old or new?

Brand new...

 

[midwest_170]

Brand new...

 

[farmer steve]

Called dalton.. Got a new one the way.. Thanks!

glad to help. did you order new spider gears?

 

[lefturnfreek]

Annnnd you slready answered the question by your replys.

Pump is fine it's valve or cylinder

 

[speeco]

Brand new...

Ok your all going at this wrong in my opinion. Warm up oil run cyl. All the way out . disconect hose on ram end of cyl. Start up motor and move control lever to run cyl. Out and hold in this position and see where oil is coming out at. If out of cyl. U have bad pistion seals in cyl. If it comes out of hose .bad control valve. Just that easy.

 

[blkcloud]

glad to help. did you order new spider gears?

New pump

 

[blkcloud]

Ok your all going at this wrong in my opinion. Warm up oil run cyl. All the way out . disconect hose on ram end of cyl. Start up motor and move control lever to run cyl. Out and hold in this position and see where oil is coming out at. If out of cyl. U have bad pistion seals in cyl. If it comes out of hose .bad control valve. Just that easy.

You were right..

 

[Sandhill Crane]

Valve is good.
Pump is good.
Cylinder seals bad?

 

[lefturnfreek]

Yup, ruined seal on the piston, that'll do it....

 

[Iska3]

I had a friend that just went through the same thing... Turned out to be the cylinder.... Hyd Oil was 50/50 oil and water, took out the seals on the cylinder.

 

[speeco]

You were right..

just glad to help. I have done a lot of hyd. troubleshooting with my job . thanks .

 

[chaser413]

Why not rebuild the cylinder? Measure the bore for deformation as well as look for wear or scoring. You could have deadheaded the pump safer by blocking the valve output and had the benefit of its pressure release at say 2500 psi or whatever it's set at!


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