Owner`s manual

2008 KNIGHT
CHASSIS INFORMATION — 10
225
Changing Air Filter
To replace air cleaner,
remove screws and
cover from air cleaner
body. Remove air
cleaner cartridge and
discard. Install new air
cleaner cartridge and
secure with cover and
screws.
Air Filter Number: Donaldson P533930
NOTE
Filter is accurate at time of printing.
Confirm part number before ordering
or obtaining replacement.
WARNING
DO NOT start the engine with the air
cleaner removed and do not remove it
while the engine is running.
Air Filter Restriction Indicator
The air lter restriction indicator improves
engine efciency by telling the amount of
restriction present in the air intake system, thus
indicating when the air lter needs changing. A
visual inspection of the air lter is not adequate
and should never dictate service life.
What Indicator Does:
Continuously shows how much life is left
in engine air lter (window).
Continuously reads air ow restrictions
in increments (scale).
When To Monitor:
Inspect indicator before each trip.
When To Change Air Filter:
When the yellow indicator approaches
the red (top) area it is signaling that
the air lter is becoming excessively
dirty. Service the air lter when the red
indicator stays in the window with the
engine off.
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How To Reset Indicator:
Push button on top to reset.
NOTE
If the air filter restriction indicator
should become faulty, replace entire
unit.
DIESEL PARTICULATE FILTER
The exhaust system is equipped with a DPF
(Diesel Particulate Filter) to lower particulate
emissions. The DPF traps particulate matter.
Naturally occurring exhaust heat oxidizes
built up particulate and regenerates the lter.
This is called passive regeneration. If passive
regeneration is not sufcient, an active
regeneration cycle will automatically initiate at
speeds greater than 20 mph. Both passive and
active regeneration cycles initiate automatically.
WARNING
Use Ultra Low Sulfur Diesel (ULSD)
only. Do not use Low Sulfur Diesel
(LSD) with a DPF equipped engine. LSD
will damage the DPF, which may cause
the Stop Engine light to illuminate and
cause the engine to severely derate.
Passive Regeneration:
Passive regeneration uses heat from naturally
occurring exhaust gasses to oxidize built-up
particulate.
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Located in rear roadside compartment
090317
090289g
Located in rear engine compartment