Maintenance
9-13
3. Rotate the entire filter assembly so the small filters point upward, then
move the assembly to the right (away from the flow gauge) and lift it
out.
4. Remove the filter hose fittings.
Note the placement and orientation of each filter before disassembling
the hoses (Figure 9-5). Loosen the screws and remove the filter assem-
blies.
5. Discard the filter assemblies.
6. Assemble a new filter assembly from new parts.
The screws at each end of the two small filters should be tight. How-
ever, over-tightening will crack the plastic.
7. Place the new filter assembly in the box and connect and secure it in
reverse order of disassembly.
Push the hose fittings into their mating connectors until they snap into
place.
Figure 9-5: Underside of Model 3910 showing filter assembly placement and orientation.
Flow Adjust
Dry/Clean
Nitrogen Output
Nitrogen Input
Air/Gas/
Liquid Filter
(output)
Cap Screw
Cap Screw
Molecular Sieve Assembly
Oil Filter
(output)