SAM Engineering Blog

Preventive maintenance for diesel generators: a practical checklist

Diesel generators are often the last line of defense for critical operations. The best reliability gains usually come from simple routines—done consistently—rather than reactive repairs after a failure.

Below is a practical checklist SAM Engineering uses to reduce downtime risk, improve start reliability, and keep performance stable under load.

• Weekly run test and abnormal noise/vibration inspection
• Battery health, terminals, and charging system verification
• Fuel quality check, filters, and leak inspection
• Cooling system levels, hoses, and airflow pathway review
• Load testing schedule aligned with usage and criticality