HS120V DRIVING & CHASSIS - TROUBLESHOOTING 4.2 CONTROL SYSTEM G5:9HM:=FGH 8F=J=B;7 756=B 9B;=B9 9@97HF=7GMGH9A =B89L 3 -23 GMW-0035 SYMPTOM CAUSE SOLUTION The control lever is not in the neutral (center) position. Defective linkage control device • Adjust it again. Disconnected linkage • Adjust it again. Check for worn rod end or loose nut. Damaged center (neutral) spring • Replace it. Linkage stuck due to interference • Fit the spring bushing into the housing and align the housing and linkage in a line. Control lever interfered with the cover or sound insulator • Check for interference. The equipment malfunctions.
Loose adjustment linkage • Check if the ball joint section of the linkage is worn. In addition, tighten the lock nut firmly. Linkage out of position • Tighten it. Leakage from the control pump • Inspect and repair the defective part. Clean the tank and hydraulic line and replace the filter. Check the engine RPM and operating oil specification. The control lever won’t return to the neutral position. Stuck control lever or linkage • Check and clean or replace it. Malfunctioning spool centering spring of the control valve • Check and repair it as necessary. The control lever cannot be operated smoothly, but it is rather moved with steps.
Worn or damaged control lever linkage • Check and repair it as necessary. Malfunctioning control valve • Check and repair it as necessary. When the seat bar is raised, the wheels are not locked. Improperly adjusted wheel pin lock • Adjust it again. The equipment does not stop properly when parking it. Defective driving motor parking solenoid valve • Check and replace it as necessary. Worn or defective driving motor parking disc • Check any damaged part and replace it as necessary. Defective charge pump • Check any damaged part and replace it as necessary.