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PLUMBING CHASSIS:
Lay unit on its back and remove all containers (see Fig.
18). Remove the three Plumbing Chassis mounting
screws and washers with #2 Phillips-head screwdriver.
Carefully lower Plumbing Chassis from top of Case and
turn over to expose Chassis components (see Fig. 18).
• CAPACITOR (Part of Compressor Motor Assy):
De-solder wires from Capacitor (see Fig. 18). Remove
tube from Filter to Flow Block. Remove Capacitor
mounting nut with 11/32" socket.
Reassemble in the reverse order. Re-solder wires to
Capacitor terminals (wires have no orientation) and
heat shrink. Heat shrink and seal (with RTV) rear ter-
minals on Capacitor. Replace tube on Flow Block.
• FLOW BLOCK (PN 460546):
Remove tubes from Flow Block (see Fig. 18). (Note:
Removal of tubes is easier if heated slightly with heat
shrink gun.) Remove Block mounting screw on bottom
of Plumbing Chassis with 1/16" Allen wrench.
Reassembly is done in the reverse order. Remove fit-
tings from old Block and attach to new Block. Note
that ribbed line coming from Syringe is designated for
water. Attach this line to water fitting on Block which is
indicated by water symbol on Chassis front panel.
• SYRINGE AIR FILTER (PN 730495):
Remove the two tubes going to Filter (see Fig. 18).
(Note: Removal of tubes is easier if heated slightly with
heat shrink gun.) With 3/32" Allen wrench, remove two
mounting screws that attach Filter plate to standoffs.
Remove plate and fittings from Filter.
Reassemble in the reverse order. It is suggested that
Lex 8 lubricant/seal (P/N 490061) be applied to fitting
to prevent leakage.
• THREE-WAY AIR SOLENOID (PN 730578):
Remove the screws holding the Saliva Ejector Pump.
Remove snap clamp from tube coming from
Compressor (see Fig. 19). Remove snap clamp from
tube coming from Air Reservoir. Disconnect wires to
Solenoid. Remove the two tubes going to Solenoid.
(Note: Removal of tubes is easier if heated slightly with
heat shrink gun.) Remove Solenoid mounting screws
with 1/16" Allen wrench. Remove tube from Air
Reservoir to Syringe Air Filter. Remove tie wraps from
both Solenoid Air Filters and remove Filters. Remove
the Air Solenoid Valve from Plumbing Chassis. Note
orientation of fittings. Remove fittings from Air
Solenoid Valve and attach to new Valve.
Reassemble in the reverse order. Inspect Air Filters and
replace if dirty/clogged. Cut the two wires from Solenoid
to approximately 4". Solder one diode (P/N 880030) onto
1" piece of violet wire (22 gauge - stranded) to cathode
(bar side) of diode. Solder 4" piece of violet wire (22
gauge - stranded) to other side of 1” wire. Twist 1" wire
side to one wire from Solenoid and heat shrink over
diode. Twist other wire from Solenoid to 4" wire and
Figure 17
Tie
Wrap
Pressure
Tube
Mtg Screws
Filter
Venturi
Center
Tube
Flat
Washer
(for
Leveling)
(Under rubber feet)
Fitting
Pressure
Tube
Clamp
Figure 18
Capacitor
Syringe
Filter
Plate
Plumbing
Chassis
Flow
Block
Water
Line
Filter
Hoses
Syringe
Air Filter
(under
plate)