Holder C-Trac 4.74 - Manual (Page 182)

Operating instructions
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C 4.74
Maintenance every 1000 hours
Change the fuel filter and fuel prefilter
See the operating instructions of the engine manufacturer.
- Remove the fuel filter cartridge with a filter wrench.
ATTENTION
Observe the instructions for handling fuels
and lubricants.
- Clean the sealing surface of the filter base.
- Coat the new gasket with oil.
- Install the new filter cartridge with a new gasket in the
filter base and tighten by hand.
NOTE
The fuel system is bled automatically.
Clean / replace the fuel pump strainer
See the operating instructions of the engine manufacturer.