GX-3R Pro Operator’s Manual Chapter 6: Maintenance • 126
Replacing the Hydrophobic Dust Filter
Some GX-3R Pros have a hydrophobic dust filter that is not attached to the filter gasket. When
replacing the hydrophobic dust filter on one of these GX-3R Pros, remove the filter and the gasket
and replace it with a filter gasket/hydrophobic dust filter assembly.
1. Verify that the GX-3R Pro is off.
2. Turn the GX-3R Pro upside down.
3. Use a small Phillips screwdriver to unscrew the two screws holding the bottom cover to the
rest of the GX-3R Pro’s case. Only unscrew them until the heads are flush with the edge of the
bottom cover.
4. Using a small flat blade screwdriver, gently pry each side of the bottom cover away from the
rest of the GX-3R Pro’s case.
5. Remove the filter gasket/hydrophobic dust filter assembly.
6. Install the new filter gasket/hydrophobic dust filter assembly with the gasket tabs facing
down.
7. Reattach the bottom cover to the GX-3R Pro. Push it onto the GX-3R Pro until it snaps into
place.
8. Reinstall the two screws that were loosened in Step 3.
Figure 17: Replacing the Hydrophobic Dust Filter
POWER
MODE
AIR
Bottom Cover
Filter Gasket/Hydrophobic Dust
Filter Assembly,
gasket tabs on opposite side of this view
CO/H
2
S LEL O
2
TOXIC
Sensor
Retainer
Side View Top View
GX-3R Pro
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