case 070 hydraulic pressure

[anthonypitre]

Hi guys I have an 1978 case 1070 serial number after 8675001. I just rebuilt the clutch, new hydraulic pump, filter and new transmission control valve. Everything was running smoothly I have over 150 hours on it now.

My issue after parking it for a week I have to prime up my clutch to get my hydraulic pressure up to shift. When tractor is running hydraulic on the dash gauge is normal when clutch is pushed i loose my pressure and have to build it up again.

It seems that its sucking air somewhere or is it a valve that is not closing to keep the pressure up when I need it. Please help

Thanks

 

[1370rod]

Please explain what you do to prime the clutch and does everything work normal after that? Do your 3pt arms go up and down properly? Rod.

 

[anthonypitre]

Hi Rod, My 3pt hitch arms, pto steering everything work fine. When I depress the clutch pedal after tractor is sitting or just sitting even running. My hydraulic pressure drops. So I have to hold the clutch in for a few sec then let go and push it in again probably like six time. Every-time I do it builds my pressure up more and more. Until I get my pressure back up again to change gears and hear that winding noise in the clutch. Once pressure is reached its only there for a few minutes and I will have to do it again but doensn't take as long for it to charge back up.

Not sure if its sucking air somewhere or a valve not closing that holds the pressure.

 

[Adirondack case guy]

Pumping the clutch pedal makes no sense whatsoever. I would check the linkage from the pedal to the inching spool and make sure the spool is traveling to it's proper limits.If everything is correct with the linkage, I would then suspect a leak in the feed tubes or the rotary manifold that feeds oil to the clutch packs.
Loren

 

[anthonypitre]

Hi Adirondack, yes pumping the clutch may not make sense, I just figured when clutch the clutch is not depressed I have normal hydraulic pressure on the gauge so pushing it in for a few seconds then release and do it again would help.

Anyway's all linkage including spool all good. I don't know what is the rotary manifold.

I did install new feed tubes with oil rings they should be good.

The only oil I can find dripping out is from my power steering pump.

Hopefully we can figure this thing out. Running out of ideas.

Anthony

 

[Adirondack case guy]

The manifold that I referred to is down inside the transmission. That is what you slid the 3 tubes with O-rings into .
Loren