A-Dec 3420 Operation And Maintenance Instructions - page 37
Steril-Vac Service
Button Replacement
If air leakage develops around the AVS Oral
Evacuator button, install a new button assembly.
Your AVS Non-Locking Button Service Kit
(10.0601.00) is in the Field Repair Kit. It con-
tains the new button with O-rings, a spring, a
tool for removing the old spring, and instruc-
tions for installing the new button.
AVS Supply Air Tubing Replacement
The supply air tubing for the AVS Oral Evacuator
is inside the flexible drain tube (see Figure 66).
If the supply air tubing becomes crimped or
develops a leak, install a new one as follows:
You will need an AVS Tubing Kit
(order A-dec part no. 10.0645.00).
1. Separate the Steril-Vac from the Pac I at the
quick disconnect.
2. Separate the flexible drain tube from the AVS
Oral Evacuator handpiece and from the elbow on
the waste container lid.
3. Unscrew the terminal nut from the AVS Oral
Evacuator handpiece and disconnect the
supply air tubing from the handpiece.
4. Remove the sleeve securing the supply air tubing
to the elbow on the waste container lid and dis-
connect the supply air tubing form the elbow.
5. Discard the flexible drain tube, the supply air
tubing, the sleeve and the terminal nut.
6. Connect the new supply air tubing to the AVS
Oral Evacuator handpiece, and tighten the termi-
nal nut.
7. Push the flexible drain tube onto the AVS Oral
Evacuator handpiece.
8. Lay the tubing in a straight line, without stretch-
ing or compressing the flexible drain tube.
• Mark the supply air tubing at the point
where the flexible drain tube ends.
• Cut the supply air tubing 1" (25mm) short
of the mark.
9. Slide the sleeve, from the kit, on the supply air
tubing. Push the tubing onto the elbow on the
waste container lid. Secure the
connection by sliding the sleeve over the
tubing and barb.
10. Push the flexible drain tube onto the elbow.
11. Reconnect the Steril-Vac to the Pac I at the quick
disconnect, and check for leaks at the tubing
connections.
85.0681.00 Rev J
Page
33
Figure 66. AVS Supply Air Tubing
Steril-Vac quick
disconnect (QD)
Supply air
tubing quick
disconnect (QD)
Waste container
Flexible drain
tube
Supply air
tubing
Barbed connector
(internal threads)
Actuation
button
Spring
AVS oral
evacuator
handpiece
Retaining
screw
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