PART 8: MAINTENANCE AND SERVICE FUEL SYSTEM
(R05/10) Y53-6032 – 205 –
CAUTION: Do not overtighten the valve. Over-
tightening can damage the threads.
• After starting the engine, check for leaks around the
filter.
Emission Components
Deisel Exhaust Fluid Tank
Vehicles that comply with 2010 EPA emission requirements
will have a Deisel Exhaust Fluid (DEF) tank mounted to the
vehicle frame. During normal operating situations, your vehi-
cle may consume DEF at a rate of 3% per gallon of diesel
consumed. The DEF tank has been designed to hold a mini-
mum of 6% of the diesel fuel your vehicle is designed to
carry.
DEF filter
The DEF system has a supply pump filter and this filter
should be serviced according to the preventive maintenance
schedule. Follow these steps to replace the DEF supply
pump filter:
1. Turn off the vehicle and allow the vehicle to cool
down. Take special precaution with hot exhaust pip-
ing.
WARNING! The exhaust piping can become
extremely hot during engine operation and
can cause personal injury including serious
burns to the skin. Allow adequate cooling
time before working near any part of the
exhaust system.
Y53-6032.book Page 205 Monday, May 24, 2010 3:37 PM
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