Case 830 Case o matic

[Schneider]

I rebuilt an 830 case o matic a couple of years ago and it has been running fine. Recently right after startup, warm or cold, it seems like the torque converter has drained down and needs a minute to refill. Gauge pressure is good, just wont engage right away and takes a minute to slowly engage. Then it works fine for as long as I a using it.

I checked pressures.

Clutch pressure 200, but it drops to 165 with the rpm.

Pump pressure @200

Converter pressure 25 psi.

I swapped the control valve with a spare and clutch pressure is only 165 dropping with rpm. I didn’t check shims.

Converter 20


Am I looking at a torque converter leak? Ill check the housing bolts when I swap the control valves again. Could the hig clutch pressure have blown a converter seal?

 

[DKase]

I have one that is really slow at building pressure when started cold. I leave the transmission in
nuetral and pull the direct drive lever for 15 seconds or so while the engine is warming up. Seems
to bring the pressure up instantly.

 

[Adirondack case guy]

Same here with my 1963 831C. Just start it and let it warm up in neutral. All will be fine.
Loren

 

[Schneider]

After swapping control valves back I found the Clutch pressure at 165 and Converter at 133.

Clutch pressure drops about 40psi at idle. The book says should not drop more than 20psi.

When I turned the converter to inspect the bolts most of the bolts took a half turn tighter as I used them to turn the engine. When I assembles i used a torque wrench. Maybe they were a little loose o maybe they are too tight now, I don’t know.

Ill see how it does this afternoon. When I took it out a minute ago i put it in 2H and went up a hill with no problem until I stopped and tried to get going up the hill again in 2H. Had to down shift to get going. Overall seems fine.

 

[Schneider]

Hasn t been a problem since the the weather warmed up.