Specifications

Engine Maintenance Preventive Maintenance
– 172 – Y53-6008A
Medium Duty (R05/09)
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 1 gallon of DEF for every 2 gallons of
deisel fuel. Be sure to maintain sufficient fluid in the DEF tank
for proper vehicle performance.
Engine Accesories: Accessory Drive Belts
You can extend the reliability and service life of your vehicle's
drive belts with proper attention to installation, and mainte-
nance. Neglect could cause belt failure. The result could be
the loss of the electrical or air system as well as possible
engine damage from overheating. So it’s a very good idea to
check your belts frequently and replace them as soon as you
detect trouble.
Follow this procedure to install an accessory drive belt:
1. Rotate the new belt around the pulleys, and then rotate
the automatic tensioner so that the idler pulley swings
toward the belt routing. Figure 1 shows an example of
the rotation direction to release the tensioner.
2. Slip the belt around the idler pulley attached to the auto-
matic tensioner.
3. Release the automatic tensioner.
4. Check the belt alignment on each pulley. The belt must
fall between the flanges of each pulley.