operators_manual

gasket; replace gasket if
necessary
.
• Check cap screws for tightness,
including those at the flanges.
Refer to the engine manufacturer's
service manual for proper
tightening sequence and torque
values.
Joints and Clamps
• Check for leaks, and tighten as
necessary. Check for deterioration
or dents in pipes and clamps which
could allow exhaust to escape.
• Replace any serviceable joints,
flexible pipes and gaskets at the
service intervals.
Selective Catalysts Reduction (SCR)
• Check SCR canister filter, clamps
and mounting brackets. Tighten if
necessary. Inspect SCR canister
for signs of rust or corrosion.
Exhaust Piping
• Check exhaust piping for rust,
corrosion, or damage. Replace
deteriorated piping before holes
appear. If piping is perforated at
any point, temporary patching or
lagging is acceptable until you can
have permanent repairs made. On
turbocharged engines, check joints
at flanges and mounting brackets
for tightness.
Diesel Particulate Filter (DPF)
• Check DPF, clamps, and mounting
brackets. Tighten if necessary.
Inspect DPF for signs of rust or
corrosion.
• Check internal baffling. You can do
this by listening for rattling sounds
while tapping on the (DPF with a
rubber mallet or revving the engine
up and down through its normal
operating range.
DEF Tank (See Aftertreatment System
manual)
Exhaust Tail Pipe
Engine Fan and Shroud
Hood Insulation Blanket
Inner Fenders Shields and Cab Skirts
Rear Axle and Suspension
Your vehicle's suspension, by design,
requires a minimal amount of maintenance.
However, suspensions in over-the-road
operations require periodic inspection to
ensure trouble-free performance.
WARNING
DO NOT work on the vehicle without
the
parking brake set and wheels
blocked securely. If the vehicle is not
secured to prevent uncontrolled vehi-
cle movement, it could roll and may re-
sult in death, personal injury, equip-
ment or property damage.
WARNING
DO NOT operate the vehicle if the sus-
pension
U-bolts are not properly tight-
ened. Loose U-bolts will cause the
axle to not be properly secured to the
suspension, which could cause loss of
vehicle control and an accident. Loose
U-bolts can also cause uneven tire
wear and poor alignment. Failure to
comply may result in death, personal
injury, equipment or property damage.
MAINTENANCE - Rear Axle and Suspension
Y53-6096-1C1 (09/20) 231
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