HS120V DRIVING & CHASSIS - TROUBLESHOOTING G5:9HM:=FGH 8F=J=B;7 756=B 9B;=B9 9@97HF=7GMGH9A =B89L 3 -21 GMW-0035 SYMPTOM CAUSE SOLUTION External oil leakage Damaged external seal (example: shaft/cam/brake seal) • Check the oil cleanliness and motor pressure. In addition, check to ensure that no discharge line is clogged and that the discharge pressure is within the equipment specification. Remove the motor and check any suspicious seal for leakage. If the shaft seal is damaged, check the bearing. If necessary, replace the part. Loose bolt • Check that all the bolts are properly tightened to the torque setting value.
Loose connection • Check that all the connections are tightened to the specified torque setting values. Insufficient braking torque Excessive pressure of the brake release chamber (disc brake) • Check that the brake pressure is applied according to the equipment specification. If the pressure is too high, check the control valve and drain line for the tank. If necessary, repair/replace it or remove clogging materials. Brake released partially due to excessively high motor case drain pressure (disc brake) • Check the case pressure according to the equipment specification. If the pressure is excessively high, check if the drain line is clogged.
Worn brake lining or disc • If necessary, replace the brake shoe or brake disc. If the parking brake (disc brake) is worn, find its cause. The brake should neither be used actively nor worn out. Anti-seize compound/anti-slip compound mixed in hydraulic oil (disc brake) • Drain and flush the system and replenish it with hydraulic oil without any additive. Remove all of the motor components, wash them thoroughly, and replace all of the brake discs with new ones. Insufficient brake operating pressure (service brake) • Check if the pressure is proper according to the equipment specification. In addition, check the source of the pressure. When necessary, repair or replace the component.