Emergency Backup Power Equipment
Preventive Maintenance – Scope of Services
Minor PM
ENGINE
Lubrication system:
- Check oil level, top off as required
- Inspect for leaks
Fuel system:
- Check level of fuel supply, refuel if needed and customer authorizes
- Inspect engine fuel lines, pump, and filters for leaks and condition
Air system:
- Inspect louvers for proper operation.
- Inspect air filters.
Cooling system:
- Check coolant level
- Check and record freeze protection, adjust freeze protection as required
- Inspect fan drive belt(s) for condition and proper tension, adjust as required
- Inspect coolant hoses and pipes, tighten clamps as required
- Check operation of jacket water heater and control thermostats
Exhaust system:
- Inspect exhaust pipes, flexes, and turbochargers where accessible
Electrical system:
- Inspect starter cables, wire, and connectors for condition and security, tighten as required
- Check and record starting battery float voltage and specific gravity
- Check electrolyte levels, add distilled water as required
- Check charger for proper operation, adjust as required
- Load test starting batteries and record voltages
- Inspect electrical control and sensor wire terminations, tighten as required
GENERATOR
Mechanical:
- Inspect fan guard for condition and security
- Inspect air inlet screen for cleanliness, condition, and security
- Inspect and lubricate bearings, as required
- Inspect mechanical connections for tightness
Electrical:
- Inspect exciter assembly, stator, and field windings for cleanliness and physical integrity
- Inspect cable and wire termination at generator for condition and security
CONTROLS
Visual inspection and check:
- Operation of auto start and remote controls
- Operation and accuracy of AC and engine instruments
- System frequency and voltage, adjust if necessary
Major PM
– Includes all tasks done during Minor PM visit plus the following:
ENGINE
Lubrication system:
- Change lube oil and lube oil filters
- Pull oil sample for analysis
Fuel system:
- Change fuel filters (if applicable)
Air system:
Service crankcase breathers, as required
Cooling system:
- Pull coolant sample for analysis
IF CUSTOMER AUTHORIZES
Test run generator under connected load for approximately 15 minutes at no-load to ensure proper operation.
LOAD BANK TESTING (optional)
- Perform resistive load bank test at 100% of generator nameplate capacity
- Record all performance data in fifteen minute intervals including: oil pressure, water temperature, voltage and frequency
- Identify proper operation of fuel system, cooling system and overall condition of engine/generator set
- Load bank testing performed with no interruption to the normal power supply
Documentation of inspection with recommendations for any corrective action deemed necessary will be provided on both Minor and Major PMs .
