Home>Knowledge>Construction Machinery Knowledge
Curing Slow Pilot Response and Joystick Drift on a Komatsu PC490LC-11 Excavator
A clogged torque converter lock-up valve and degraded transmission filter caused torque converter overheating and power loss
Worn 1A contactor tips and a shorted mast height potentiometer caused severe voltage drops that reset the drive controller
Melted piston seals and a stuck port relief valve caused by sustained oil overheating led to massive internal bypass and loss of holding power
A collapsed suction filter element and stuck load-sensing shuttle valve caused simultaneous hydraulic circuit starvation
A corroded CAN bus connector and failed manifold absolute pressure sensor caused the engine control module to shut down completely
A corroded swing bearing gear and failed slew motor brake caused the machine to overspeed and trigger false load warnings
A failed torque converter lock-up clutch and clogged transmission filter caused severe heat generation and loss of drive power
Corroded hoist contactor tips and a frayed battery cable caused severe voltage drop and controller lockouts during heavy lifts
A blown travel motor balancing valve and worn reduction gear bearings caused unilateral power loss and severe track misalignment
