There is a relief valve on top of the orbit motor to set The steer pressure. Sometimes when it's turned CW a 1/4 turn , steering is corrected. Connect gauge to the P port with the adapter 09450-23320-71. Pressure gauge is 1/8 PT. But pressures have to be taken. Should be at 1170 psi for 2 to 3 ton units. Hopefully the hoses didn't soften up and cause debris to get into the system. Supply hoses are standard hydraulic braided hose and return is low pressure. 300 psi. The orbit motor is not recommended to be rebuilt If all else has failed.