MAINTENANCE
69
8400D MM312 (2–94)
DEBRIS HOPPER
HOPPER DUST FILTER
The dust filter filters the air pulled up from the
hopper. The dust filter is equipped with a shaker
to remove the accumulated dust particles. The
dust filter shaker is operated by the filter shaker
switch.
Shake the dust filter before emptying the hopper
and at the end of every work shift. Check and
clean or replace the dust filter every 100 hours of
operation.
To clean the dust filter, use one of the following
methods:
SHAKING – Press the filter shaker switch.
TAPPING – Tap the filter gently on a flat
surface with the dirty side down. Do not
damage the edges of the filter element or
the filter will not seat properly in the filter
frame.
AIR – Blow air through the dust filter
opposite the direction of the arrows. This
may be done with the dust filter in the
machine. Always wear eye protection when
using compressed air.
FOR SAFETY: When servicing machine,
wear eye and ear protection when using
pressurized air or water.
WATER – Soak the dust filter in a water and
mild detergent solution. Rinse the dust filter
until it is clean. Air dry the wet dust filter; do
not use compressed air.
NOTE: Be sure the dust filter is dry before
reinstalling it in the machine.
REMOVING HOPPER DUST FILTER
1. Stop the engine and set the machine parking
brake.
FOR SAFETY: Before leaving or
servicing machine; stop on level
surface, set parking brake, turn off
machine and remove key.
2. Open the hopper cover.
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