A summary of diesel generator service items by running hours – a reference for standby sets in factories and buildings and for marine generators.
Exact intervals depend on the engine make, fuel quality and operating conditions. The outline below is a common reference; always follow the manufacturer’s manual first.
Weekly (standby sets)
- Check oil, coolant and fuel levels and look for leaks.
- Check batteries, charger and controller indicators.
- Short test run per your site procedure.
Every 250 hours (or 6 months)
- Change engine oil and oil filter.
- Change fuel filters, drain the water separator.
- Inspect/clean the air filter; check belts and radiator.
Every 500 hours (or 12 months)
- All 250-hour items.
- Replace the air filter, check coolant concentration.
- Inspect turbo, intake/exhaust pipes and anti-vibration mounts.
Every 1,000 hours (or 24 months)
- All 500-hour items.
- Check and adjust valve clearances; test injectors.
- Replace coolant, inspect water pump and thermostat.
- Inspect alternator and AVR, re-torque terminals; load test.
Keep records
A log of running hours, parts replaced and test results shows the true condition of the set. TTT offers scheduled generator maintenance contracts and stocks filter kits for each model.
Need advice or a quote? Send the part number or a photo of the nameplate through our quote form or call 0909 580 181 – TTT engineers reply within the working day.
