977K

Mike Burgin · May 16, 2014

All test done cold:

Pump pressure – 360lbs
Speed Clutch pressure – 100lbs
Direction Clutch Primary pressure – 0lbs
Direction Clutch pressure – 0lbs
Transmission Lub Oil pressure - .5lbs
Outlet From Torque Converter pressure - 56lbs
Sequence Relief Valve pressure – 350lbs
Inlet Torque Converter pressure – 360lbs
Steering Clutch Piston pressure – Right- 240lbs, Left- 270lbs

We replaced seals in torque converter outlet.
Replaced deals in torque converter inlet.
Cleaned filters.
Replaced seals in steering clutch.
Fixed spring leak in corner on transmission with a new seal.

NOTE: On the torque converter and sequence relief valve there was no oil, but after cleaning, oil is now passing through these parts. The loader did move a little before we cleaned things up, now it will not move at all.

Anonymous-0 · May 16, 2014

I think you have a problem in the Main relief/Torque Inlet relief valve body. You should not be getting that much inlet pressure. The inlet pressure usually reads about 10 PSI higher that the outlet pressure with oil at operating temp. To check you stall the torque with cold oil and should see around 140 Psi. With that much pressure I suspect the oil isn't getting into the torque. With that much pump pressure the speed and directional pressures should be good. You need to take the pressure control pack off the top of the trans valve to clean and inspect it. The pressures you are getting look like primary pressures so maybe the check valve is not closing. Re check pressures with warm oil.
Later Bob

977K

Mike Burgin

New User

Anonymous-0

Well-known Member

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