SHIELD AS-HEAT 4874650 - Caterpillar

Primary Cab Air Filter
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The primary cab air filter is located behind protection cover (3) on the left side of the cab. In order to open the protection cover, unlock lock (2) and turn lock (4) counterclockwise. Then, pull latch (1) outward.
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Open filter cover (6) by removing retaining screw (5) .
Remove the filter from behind filter cover (6) .
If the air filter is not damaged, clean the air filter with pressurized air. The maximum air pressure for cleaning is 205 kPa (30 psi).Direct pressurized air along the pleats from no closer than 160 mm (6 inch) from the air filter.If the air filter is damaged, replace the air filter.Secondary Cab Air Filter
The secondary cab air filter is located inside the cab. The filter is on the rear wall of the cab behind the seat.
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Open filter cover (7) by removing retaining screws (8) .
Remove the filter from the filter housing.
If the air filter is not damaged, clean the air filter with pressurized air. The maximum air pressure for cleaning is 205 kPa (30 psi).Direct pressurized air along the pleats from no closer than 160 mm (6 inch) from the air filter.If the air filter is damaged, replace the air filter.