977h powershift

[Ward McKay]

I have an old 977h lever steer. The transmission seems to get weak after a cpl hours. It starts to heat ,and oil level goes up. If I let it idle and cool it goes back to normal. In the manual it refers to a bypass valve in the filter . I checked it and the spring seemed very weak ,the plunger a bit scored. It said if not working properly it can divert pressure away from the torque converter or away from clutches. Does anyone know more about this?

 

[Dave Neubert]

Check your pressures first sounds like a weak torque convertor. the bi pass valve only bipasses the filter if the filter becomes clogged

 

[Ward McKay]

Gauge reads normal until it gets to the hot side. But its an old gauge.