HS120V DRIVING & CHASSIS - TROUBLESHOOTING G5:9HM:=FGH 8F=J=B;7 756=B 9B;=B9 9@97HF=7GMGH9A =B89L 3 -19 GMW-0035 SYMPTOM CAUSE SOLUTION Insufficient output torque or draft force Insufficient pressure built in the pump • Apply the full load on the motor and check the maximum pressure according to the equipment specification. If the measurement is excessively low, plug the lines A & B and measure the maximum pressure at the blocked line. If the measurement is still too low, adjust, repair, or replace the pump, pump adjuster, or system pressure relief valve as necessary.
Excessive oil leakage from the motor and impossible to build full pressure • Apply the full load on the motor and check the maximum pressure according to the equipment specification. If the measurement is excessively low, plug the lines A & B and measure the maximum pressure at the blocked line. If the measurement is proper, remove and inspect the motor. Replace any faulty part. If necessary, replace the whole motor. Insufficient break-in of the motor • Operate the motor for 24-48 hours continuously (under load) to achieve its maximum efficiency. If the output torque increases continuously, this symptom may appear during this period.
2-Speed spool partially or fully moved unintentionally due to high 2-speed shift pressure (if equipped) • If the spool does not move properly according to the equipment specification, check the 2-speed shift pressure. If the pressure is excessively high, adjust, repair, or replace the control valve. If necessary, check if the line is clogged. 2-Speed spool partially or fully moved and stuck in place (if equipped) • Remove the 2-speed valve and check all the components, including the bore of the motor housing. Remove any foreign material. If necessary, replace any necessary component or the motor housing.
Brake not released fully, due to excessively low brake release pressure (if equipped) • Check the brake release pressure according to the equipment specification. If necessary, adjust, repair, or replace the source of the pressure. If the source of the pressure is normal, remove the brake and replace the brake seal as necessary. Internal damage to the motor • Apply the full load on the motor and check the maximum pressure according to the equipment specification. If the measured pressure is normal and there is no apparent defect, other than the one described above, remove and check the motor. Replace any defective part. If necessary, replace the whole motor.