Engine Mounted Fuel Filter Replacement - RAM Commercial CHASSIS CAB 3500 2021 Owner's Manual

376 SERVICING AND MAINTENANCE
NOTE:
Over-compression of the seal due to over-tight-
ening of the drain will damage the seal, cause
a leak, and require the entire sensor to be
replaced.
3. Turn the ignition switch to OFF.
The sensor drain should not be over-tightened
during normal service operations to avoid
internal damage and future fuel leaks.
The drain should be closed and secured
without the use of tools.
If more than a couple ounces/milliliters of fuel
have been drained, follow the directions for
"Priming If The Engine Has Run Out Of Fuel"
Ú page 378
E M F F
NGINE OUNTED UEL
R
EPLACEMENT
NOTE:
Using a fuel filter that does not meet the

manufacturer's filtration and water sepa-
rating requirements can severely impact fuel
system life and reliability.
The engine mounted filter housing is

equipped with a No-Filter-No-Run (NFNR)
feature. Engine will not run if:
a. No filter is installed.
b. Inferior/Non-approved filter is used.
Use of OEM filter is required to ensure
vehicle will run.
ILTER
Engine Mounted Fuel Filter Assembly
1 — Drain Valve
CAUTION!
Diesel fuel will damage blacktop paving

surfaces. Drain the filter into an appro-
priate container.
Do not prefill the fuel filter when installing a

new fuel filter. There is a possibility debris
could be introduced into the fuel filter
during this action. It is best to install the
filter dry and allow the in-tank lift pump to
prime the fuel system.
1. Ensure engine is turned off.
2. Place drain pan under the fuel filter drain
hose.
3. Open the water drain valve a quarter turn
counterclockwise and completely drain fuel
and water into the approved container.
4. Close the water drain valve.
5. Remove lid using a socket or strap wrench.
Rotate counterclockwise for removal.
Remove used o-ring and discard it.