TM 5-3895-383-24 Problem Too much force is needed to turn the steering wheel. Probable Cause The relief valve is open. The hydraulic oil level is low. The oil pressure in the gear pump is too low. Metering pump covers are too tight. The metering pump is defective. The hydraulic oil is cold. Alignment of steering column is not correct. Problem The machine does not turn when the steering wheel is turned. Probable Cause The hydraulic oil level is low. There is air in the hydraulic system. There is dirt in the hydraulic system. The operation of the gear pump is not correct. The frame articulation is locked because the lock pin is in the hole in the yoke. One of the steering cylinders has worn piston rings. Problem The machine turns slowly in both directions. Probable Cause There is not enough oil flow from the gear pump. The suction line in the gear pump is restricted. Metering pump operation is not correct. Seal leakage in the steering cylinders. The priority valve spool that is inside the gear pump does not allow enough oil to go to the metering pump. The pressure in the steering circuit is too low. Problem Machine turns slowly in one direction. Probable Cause There is a restriction in the metering pump. Problem The metering pump does not return to the center position correctly. Probable Cause Metering pump covers are too tight. Alignment of the steering column is not correct. The valve spool in the metering pump has a restriction. One of the steering cylinders is not functioning properly. Problem Temperature of hydraulic oil is too hot. Probable Cause Viscosity of the hydraulic  is not correct. Air is mixed with the hydraulic oil. The relief valve in the steering system has a defect. There is a restriction in one of the steering system lines or components. The oil cooler is plugged. Problem When the steering system pressure is tested, the system does not reach the relief valve pressure setting of 19000 ± 300 kPa (2750 ± 45 psi). Probable Cause The relief valve is not properly shimmed . The relief valve is open. The relief valve is defective. 12-27