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A clogged catalytic converter and retarded ignition timing caused the engine to run rich, overheat, and lose power under load
A failed load check valve in the main control valve allowed hydraulic oil to leak back into the tank, causing the bucket to drift open
A worn torque converter impeller hub and low fluid level caused the transmission to slip under heavy load, mimicking a clutch failure
Worn steering knuckle bearings and a loose orbitrol coupling caused excessive looseness in the steering system
A torn air intake hose and dirty fuel injectors caused the engine to run rich and fluctuate RPM under load
A broken shift cable mounting bracket and stuck inching valve caused the transmission to remain permanently in high-range gearing
Worn chain anchor pins and uneven chain elongation caused the lift chains to skip over the sheave wheel, creating a severe safety hazard
A damaged swing motor brake valve and clogged orifice caused the swing to accelerate and decelerate unpredictably
A sheared parking brake hub key and worn clutch plates caused the machine to roll forward even with the transmission in neutral
Corroded traction motor connector and worn brushes caused voltage drop and drive shutdown under load
