Severe cycle-time elongation and tracking drift on 30-ton fleet assets indicate deep internal pressure erosion within the primary rotary group. When the original valve plate faces sustain micro-scoring from abrasive silt, the system's volumetric output drops sharply under heavy loading, leading to engine lugging, attachment fade, and expensive field downtime. Do not let an inefficient hydraulic heart compromise your high-volume ZX330 or ZX350 earthmoving operations.
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