Fuel Filter - Replace While Engine Is Running - Mitsubishi S12R-T2MPTK Operation & Maintenance Manual

Fuel Filter - Replace While Engine is Running

If the engine has to be operated continuously, you can replace fuel filters while the engine is running by turning the
switchover cock located between the fuel filters.
Note: (a) In general, the engine must be stopped when replacing fuel filters.
Only if you cannot stop the engine at any cost, replace fuel filters by following the instructions below.
(b) During fuel filter replacement, fuel may flow out from the stop side filter mounting surface. Be sure to place
a tray under the fuel filter.
When replacing fuel filters during operation, be sure to decrease engine speed to low idle.
1. Remove the switchover cock cover.
2. Turn the switchover cock and align the pin with the
mark.
3. After the fuel filter is replaced, bleed the fuel filter.
Note: For bleeding the fuel filter, refer to
Bleed Air" (3-2).
4. Place the switchover cock in the operating position.
5. Install the switchover cock cover.
Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Operating position
Right side fuel
filter changing
position mark
"Fuel Filter -
Right side air
bleeding
position mark
Fig. 8-11 Fuel Filter Switchover Cock
Switching pin
Left side fuel
filter changing
position mark
Left side air
bleeding
position mark
Switching cock
8-9