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A clogged proportional solenoid valve filter screen caused low clutch supply pressure, burning the 1st gear friction discs and inducing violent shift shock
A pump regulator PC-EPC solenoid seized at maximum displacement electrically loaded the starter motor and forced the main pump to dead-head against a closed-center valve at idle
A cracked high-pressure fuel injector line O-ring allowed air ingress into the common rail, causing vapor lock and fuel starvation during heavy hydraulic lift cycles
A scored boom lock valve sleeve caused massive high-pressure internal leakage, inducing severe boom chatter and overheating the hydraulic system to 110°C
A heavily scored swivel motor valve plate due to water-ingressed emulsified oil caused catastrophic internal leakage, metal-on-metal friction, and loss of swing holding brake
Worn hydraulic pump motor brushes to the spring root caused an armature dead-short, welding the main contactor tips and locking out the BMS
A seized priority flow divider valve starved the steering metering pump, causing front axle clutch pack burnout and permanent directional drift during roading
A corroded swing pilot pressure sensor connector caused the brake solenoid to remain energized, burning the swing brake discs and stalling the main pump via mechanical overload
Worn exhaust valve guides allowed oil ingestion and valve seat warping, causing severe exhaust restriction, backfiring, and torque-converter stall under load
A high-resistance directional solenoid coil and a worn modulating spool caused clutch pressure spikes followed by total pressure loss in the ZF 4WG transmission
