Priming The Fuel System; Priming The Fuel System After Servicing The Fuel Filters - Navistar MaxxForce 7 Operation And Maintenance Manual

Priming the Fuel System

GOVERNMENT REGULATION: Engine fluids
(oil, fuel, and coolant) may be a hazard to human
health and the environment.
other contaminated materials (e.g.
accordance with applicable regulations.
or dispose of engine fluids, filters, and other
contaminated materials according to applicable
regulations.
WARNING: To prevent personal injury or death, shift
transmission to park or neutral, set parking brake, and block
wheels before doing diagnostic or service procedures.
WARNING: To prevent personal injury or death, do not
smoke and keep fuel away from open flames and sparks.
CAUTION: To prevent engine damage, do not add fuel to the
fuel filter header. This can contaminate the fuel.
1. Set parking brake and shift transmission to park or
neutral.
2. Verify water drain valve on primary fuel filter housing is
closed and fuel filter caps are on tight.
Page 50
SECTION 4 – ENGINE OPERATION
Handle all fluids and
filters, rags) in
Recycle
3. There are two ways to prime the fuel system; use only
one of the following two ways.
PRIMING THE FUEL SYSTEM AFTER SERVICING THE
FUEL FILTERS
1. Prime the engine after the primary and secondary fuel filters
have been serviced as follows:
a. Key - On for 10 seconds
b. Key - Off for 15 seconds
c. Key - On for 10 seconds
d. Key - Off for 15 seconds
e. Key - On for 10 seconds
2. Check for fuel leaks prior to starting engine. If leaks are
found correct the problem.
3. Start the engine and check for leaks. For further information
see Starting the Engine (page 51).
4. If leaks are found, shut down the engine and correct the
problem.
5. If engine does not start, see the Engine Diagnostic Manual.