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4.1
Section 4
Air Cleaner and Air Intake System
4
Section 4
Air Cleaner and Air Intake System
Air Cleaners
General
Most engines are equipped with a replaceable, high-
density paper air cleaner element, surrounded by an
oiled foam precleaner, and housed under a flat outer
cover. This is typically referred to as the standard air
cleaner assembly. See Figures 4-1 and 4-4. Some
engines utilize a heavy-duty style air cleaner as shown
in Figure 4-12.
CH18-745
Figure 4-2. Removing Latch Style Cover.
Figure 4-1. Standard Air Cleaner.
Standard Air Cleaner
Service
Check the air cleaner daily or before starting the
engine. Check for and correct any buildup of dirt and
debris, along with loose or damaged components.
NOTE: Operating the engine with loose or damaged
air cleaner components could allow unfiltered
air into the engine, causing premature wear
and failure.
Figure 4-3. Removing Knob Style Cover.
Precleaner Service
If so equipped, wash and reoil the precleaner every 25
hours of operation (more often under extremely dusty
or dirty conditions).
To service the precleaner, perform the following steps:
1. Unhook the latches or loosen the retaining knob,
and remove the cover.
2. Remove the foam precleaner from the paper air
cleaner element.
Cover
Precleaner
Air Cleaner Element