User Manual

Axle Differential Carrier Identification Usually located on the top side of the differential carrier. The following information is either
stamped, or marked with a metal tag: Model No., Production Assembly No., Serial No., Gear
Ratio, and Part Number
.
Clean Idle
To comply with CARB emissions
requirements, your vehicle will either have
the Certified Clean Idle label or an Engine
Shutdown System (ESS). Some vehicles,
however, are exempt from these
requirements because of their
configurations (for example: fire truck
service).
Your vehicle may have either of these
labels affixed to the vehicle to identify that
its engine meets the strict low exhaust
emission regulations instituted by the state
of California (and other states that have
chosen to adopt CARB emissions
requirements). Trucks with this type of
engine will not require an Engine
Shutdown System and will be allowed to
idle continuously. It is important that you do
not remove or deface this label. Do not
block it from view. Please contact your
authorized dealership if you need to
replace this label. The dealership will be
able to help you to determine whether or
not your vehicle's engine may be a
candidate for a Certified Clean Idle label if
it did not already have the label.
If you have a P
ACCAR PX-7 or PX-9
engine, your label will look like the image
below.
If you have a Cummins engine, your label
will look like the image below
.
Engine Shutdown System
If the vehicle’
s engine does not meet the
low exhaust emission standard it will have
an Engine Shutdown System (ESS) to
meet limited idle regulations implemented
by CARB and some additional states.
These regulations require that the engine
have an automatic system to restrict the
idle time on certain vehicles. An Engine
Shutdown System will shut down the
engine after 5 minutes if the vehicle idles
with the park brake set and the
transmission in ‘neutral’ or ‘park’. The ESS
will also allow the vehicle 15 minutes of
idle time if the driver does not set the park
brake and shifts the transmission to
‘neutral’ or ‘park’. The ESS, however, will
not shut down the engine if the engine is
operating in Power Take Off (PTO) mode, if
the engine coolant is below 60 degrees
Fahrenheit, or if the engine is performing a
parked regeneration. The check engine
light will alert you when the ESS shutdown
timer reaches the last 30 seconds before
the engine shuts down. The last 30
seconds prior to engine shutdown is the
INFORMATION - Clean Idle
292 Y53-6113-1A1 (11/20)
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