DRIVING & CHASSIS - TROUBLESHOOTING HS120V G5:9HM:=FGH 8F=J=B;7 756=B 9B;=B9 9@97HF=7GMGH9A =B89L 3 -22 GMW-0035 SYMPTOM CAUSE SOLUTION Impossible to release the brake Excessively low brake release pressure (disc brake) • 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. Damaged brake piston or seal (disc brake) • When necessary, replace the brake piston or seal. Deposited brake plate (disc brake) • Remove and inspect the brake. If necessary, replace the part. If it is deposited, find the cause.
The parking brake should never be used as a service brake. The 2-speed adjuster is malfunctioning (if equipped). Incorrect 2-speed adjusting pressure • Check the adjusting pressure when moved and not moved according to the equipment specification. Check the adjusting components, and repair or replace them as necessary. Damaged 2-speed valve • Remove the 2-speed valve and check all of the components, including the bore of the motor housing. Remove any foreign material. If necessary, replace any necessary component or the motor housing.
2-Speed valve partially moved or not moved at all due to excessively high motor case drain pressure • Check the case pressure according to the equipment specification. If the pressure is excessively high, check if the drain line is clogged.