What is the cause of the slow moving track (left) on my sk200-8 kobelco excavator. we already checked the drive motor but still very slow when we turn using the left track.
Are any other functions slow? Boom, stick, bucket?
Other functions are just fine and working normally..
how with pressure output hydraulic pump ?
Check P-port fitting on the Left travel control valve . oil supply port fitting . Some machines have screened port fittings to keep debris out of pilot oil system . When they get clogged , travel function is limited or non existent.
We check with hydraulic pressure gauge but there is no pressure on forward & reverse port line.
Check pressure at main hydraulic pump. Not at travel motor.
Both sides and under load.
We check already the main pump and main relief, but still very low pressure. Only left track is is having problem, right side is okey.
After a series of troubleshooting we found out that the control valve is defective, and when we've changed it, the machine works fine.