Power Tech Generators PTI-25 Operation & Maintenance Manual page 32

Changing the Fuel Filters
!
DANGER
Moving Parts.
Will cause severe injury or
death.
During operation, some parts of the generator set can become extremely hot. To avoid burns, allow
the engine to cool sufficiently before changing the fuel filters.
Always stop the engine before changing the fuel filters. DO NOT change the fuel filters while the
engine is running.
Always put the generator set in OFF mode and activate the Start Inhibit switch (if equipped) before
changing the fuel filters. If the generator set is in AUTO mode, the generator set may start
automatically, without warning.
Water, dirt, and other contamination in the fuel can cause the engine to not operate properly,
increase wear and/or engine damage. The fuel filters trap these contaminants before they reach the
engine. Periodic replacement of the fuel filters is required according to the manufacturer's
schedule. Use the following steps to replace the fuel filters.
Primary Fuel Filter and Pre-Filter Replacement
1. Shut down the generator set and put it in OFF mode.
2. If equipped, activate the Start Inhibit switch.
3. Ensure the generator set is on a level surface and properly supported.
4. Allow the generator set to cool fully.
5. Loosen the drain plug and air bleeder plug on the fuel filter to drain the fuel inside the filter.
6. Unscrew the element case from the filter boss, ensuring the old O-ring does not remain behind.
7. Remove the old filter element and replace it with the new one.
8. Apply a thin film of clean diesel fuel to the new O-ring supplied with the new element and use it
to replace the old O-ring.
9. Screw on the element case to the filter boss and tighten.
10. Bleed the air from the fuel system.
11. Clean up any spilled fuel.
!
WARNING
Hot Engine and Exhaust
System
Can cause severe injury or
death.
!
WARNING
Risk of Fire
Can cause severe injury or
death.
Page 32 of 56