TROUBLESHOOTING /SYSTEM PERFORMANCE Troubleshooting
Ｃ-1.Steering is impossible or hard
（４）Faulty orbit-roll (sticking or worn spool and sleeve)
Measure the force required to turn the steering wheel. 1. Place the machine in a travel position on a level, paved surface, and release the parking brake. 2. Make the hydraulic fluid to an operating temperature (40 - 60°C). 3. Make the bucket empty. 4. Under this condition, measure the forces required to turn the steering wheel for both when the engine is running at a low idling speed and when it is running at the maximum speed. At the same time, check for any irregularity in the required turning force (sticking).
Refer Performance standard list for standard value.
Measure the amount of slip of the steering wheel. 1. Turn the steering wheel to the right or left until it makes a close contact with the stopper on the frame stopper (stroke end). 2. Continue turning the steering wheel further; the steering wheel will be made to rotate while slipping due to the internal leakage that takes place in the orbit-roll. Measure the number of turns the wheel make in a minute. Standard value The standard value for a new machine is 3.5 turns per minute. If the number of turns is 1.5 times the standard value, the internal leakage is excessive, so the steering system must be repaired.
Above standard value
Repair or replace orbitroll.
5RTKPI $CNCPEG
５ ‑229
