Case 580SR Service Manual page 157

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Low pump pressure
High pump pressure
Low forward or reverse clutch
pack pressure
High forward/reverse clutch
pack pressure
Converter pressure low
Converter pressure high
Low 4WD clutch pack
pressure
High 4WD clutch pack
pressure
Low lubrication pressure
SECTION 21 - TRANSMISSION
Worn or broken pump.
Pump seal ring leaking.
Restricted oil strainer or filter.
Blockage in oil ports between transmission sump and oil pump.
Pressure regulator valve stuck open.
Cold start valve stuck open.
Pressure relief solenoid valve faulty.
Has normal operating oil temperature been reached?
Direction control solenoid valve faulty.
Piston seal or O-ring leaking.
Input shaft seal ring leaking.
Pressure relief solenoid valve faulty.
Converter relief valve faulty.
Leak in converter, oil cooler or connection hoses.
Very hot oil.
Converter relief valve faulty.
Blockage or restriction in the oil cooler.
Very cold oil.
4WD piston seals leaking.
4WD shaft seal ring leaking.
Leak from 4WD clutch supply pipe.
Faulty 4WD solenoid valve.
Blockage or restriction in 4WD clutch supply pipe.
Pressure relief solenoid valve faulty.
Blockage or restriction in the oil cooler.
Input shaft front seal ring leaking.
Very hot oil.
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