Case 1070 trans pressure

chrisk1500 · Oct 16, 2014

I have a case 1070 powershift that is showing low trans pressure on the gauge.

The needle is pointing just on the green edge beside the yellow bar.

I have changed the red and white filters with no change in pressure.

Is the pump on the back of the tractor above the PTO the one responsible for the trans pressure or is there another pump somewhere else?

Thanks

RGMartin · Oct 16, 2014

The dash gauge shows the lubrication circuit pressure. All 4 of my powershifts live on the edge of Green/Yellow. Most have been here for 20-30+ years with no change or issues.

Same with the temperature gauge... If the needle isn't straddling the green/yellow boundary the radiator needs cleaned badly.

Adirondack case guy · Oct 16, 2014

There is a diverter valve bolted to the the RH side of tranny under platform. In the front top of the valve you will see a roll pin with shims and a spring behind it. Drive the pin mostly out and then wiggle a 5/16 washer behind the pin and put it back in place. If your pump, which you correctly identified is good, and you have no inturnal RPS34, or PTO clutch leaks you should see a rise in the pressure with the washer installed.
Loren

chrisk1500 · Oct 16, 2014

(quoted from post at 16:46:27 10/16/14) There is a diverter valve bolted to the the RH side of tranny under platform. In the front top of the valve you will see a roll pin with shims and a spring behind it. Drive the pin mostly out and then wiggle a 5/16 washer behind the pin and put it back in place. If your pump, which you correctly identified is good, and you have no inturnal RPS34, or PTO clutch leaks you should see a rise in the pressure with the washer installed.
Loren

Is it this one??

mEl · Oct 16, 2014

you can do an accurate test with a calibrated gage on the powershift cover test ports. The clutch application pressure should read 180-210 in each test port c1 and c2 for lo ps, 1-3 for 2nd, 2-3 for 3rd, clutch down, 4th only, and reverse c2-c4.

Clutch pedal position will modulate c2 pressure in 1st powershift and reverse powershift.

Lube pressure should be checked as well and it will be near 75 lbs if at spec. The dash gage takes it's pressure right from the main channel of the flo divider, the small copper line on the top right of the flo divider, so it will read system pressure and if the pressure drops in a particular range, often you can see a drop in system pressure in that range.

I would make sure the pressure is even on all clutches with hot oil then make a pressure adjustment, reason being if a clutch is leaking.

If this is a new problem with the lo pressure I would wonder why as those flo dividers usually work for years without needing reset. This info is in addition to the others advice and may save you some time chasing something that isn't wrong.

Adirondack case guy · Oct 17, 2014

You have the correct valve. Sorry, I said top of valve, but pressure control is on the bottom, not the top. It's been a while since I have messed with one. Follow Mel's guidance.
Loren

Case 1070 trans pressure

chrisk1500

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RGMartin

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Adirondack case guy

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chrisk1500

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mEl

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Adirondack case guy

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