Title: Service the water separator/fuel heater and fuel filter(s).
Course: Diesel Equipment Technology I (20107-I) > Section: Preventive Maintenance and Inspection: Servicing the Fuel System

Servicing should be performed daily and should include

- checking the fuel heater for coolant leaks at the line or fittings
- replacing fuel filters, according to the manufacturer guidelines
- using the manual or electric priming pump to fill the filter
- removing air from the system.

ASE 3: I. Diesel Engines: G. Fuel System (P-1)

Process/Skill Questions:

- What may happen if the water separator is not drained?
- Why might a fuel heater be needed?
- Why should fuel filters be installed empty?
- Why must air be removed from the fuel system?