This DD320 Jumbo inspection checklist helps teams perform thorough pre start and maintenance checks on underground drill rigs. It covers safety prerequisites such as PPE, risk assessment, lockout, and functional tests, then guides inspections of booms, feeds, drifters, gauges, accumulators, flushing heads, rotation and percussion pressures, water pressure, compressor and shank lubrication systems. Record machine hours, verify driveline and axle mountings, document defects with notes and photos, and assign corrective actions to maintain safe, reliable performance.
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