MAINTENANCE AN D SERVICING
Air Filter Restriction Indicator
During engine operation, the indicator shows the vacuum in inches of H
2
O and kPa. As dirt accumulates in the
filter, the restriction increases.
When indicator gauge (A) shows a restriction of 25 inches
of H
2
O (6.20 kPa) and window (B) shows red, the filter
requires servicing.
IMPORTAN T:
Over-servic
ing the filter element increases the risk of dirt
being inges
ted by the engine, and severely damaging the
engine.
Service air filter ONLY IF indicator (A) reads 25 inches H
2
O
(6.20 kPa) and/or indicator (B) shows red.
IMPORTAN T:
After servicing filters, press button (C) to reset the gauge
and clear the red in dicator from window (B).
Figure 5.6
6: Air Filter Restriction Indicator
Removing Primary Air Filter
1. Open the hood, re
fer to 5.4.1 Opening Hood (Lower
Position), page
202.
2. Slightly lift c
atch (A) at side of end cap (B) and rotate
end cap co unter
clockwise until it stops.
Figure 5.67: Engine Air Cleaner
3. Make sure arr
ow (A) lines up with UNLOCK symbol on
end cap.
4. Pull off the
end cap.
Figure 5.68: Engine Air Cleaner
169890 231 Revision A
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