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DISASSEMBLY
- Cont’d
TOGGLE VALVES (PN 730010 - Qty 3):
There are three Toggle Valves on Electronics Module:
1.) Scaler Coolant On/Off Switch; 2.) Handpiece
Coolant On/Off Switch; and, 3.) Handpiece Coolant
Air On/Off Switch. All three Valves can be disassem-
bled in a similar fashion.
Remove tubes from Valve (see Fig. 10). Loosen internal
nut with 9/16” thin box-end wrench until outer nut can
be removed by hand. Note orientation of Valve.
Remove outer nut and Valve. Remove fittings and
attach to new Valve.
Reassemble with orientation as before. Loosen inner
nut so that outer nut can be brought to the chamfer.
Use 9/16” open-end wrench on upper body and tighten
internal nut with 9/16” thin open-end wrench. This will
avoid damage to the outer surface.
NEEDLE VALVES (PN 730066 - Qty 2):
There are two Needle Valves on Electronics Module:
1.) Scaler Coolant Adjust Valve; and, 2.) Handpiece
Coolant Flow Adjust Valve. Both Valves can be disas-
sembled in a similar fashion.
Remove the Valve knob with a 1/16” Allen wrench (see
Fig. 10). Note orientation of Valve prior to removal.
Remove tubes from Valve. Loosen inner nut with a
9/16” thin open-end wrench until outer nut removes
freely by hand. Remove outer nut and Valve. Remove
fittings and attach to new Valve.
Reassembly with orientation as before. Loosen inner
nut so that outer nut can be brought flush to valve sur-
face. Use a 9/16” open-end wrench on upper body and
tighten internal nut with 9/16” thin open-end wrench.
This will avoid damage to outer surface. Ensure that
valve is turned to closed position and replace knob.
FOOT SWITCH RECEPTACLE (PN 875026):
Remove cable connector from Power/Display Board
(see Fig. 11). Remove ground wire from ground stud
with 5/16” socket. Remove connector from chassis with
3/4” open end wrench.
Reassembly is done in reverse order. Ensure that all
ground terminals are reinstalled.
MOTOR RECEPTACLE (PN 875048):
Remove cable connector from Power/Display Board
(see Fig. 11). Remove ground wire from ground stud
with 5/16” socket. Remove wires from Two-Way
Solenoid from the connector. Remove water line and
air line from barb. This can be accomplished with a
small pair of scissors. Note orientation of connector.
Remove four nuts and washers with 1/4” socket.
Remove connector from chassis.
Reassembly is done in reverse order. Place connector
back in same orientation as before. Place water line to
barb closest to Grn/Yel ground wire. Insert Solenoid
wires into connector. Ensure that terminals are firmly in
connector. Re-attach hardware and connector. Ensure
that all ground terminals are reinstalled.
TWO-WAY SOLENOID (PN 730469 - Qty 2):
There are two Two-Way Solenoids on the Electronics
Module: 1.) Water On/Off to Motor and Scaler; and, 2.)
Air On/Off to Motor. Both Valves can be disassembled
in a similar fashion.
The two Two-Way Solenoids are the two valves with
blue wires (see Fig. 11). Remove tubing from Solenoid.
Remove Motor Cable Connector from Power/Display
Board. Remove two blue wires from Connector going to
the Solenoid. Remove Solenoid button-head screws
with 1/16" allen wrench. Remove fittings from Solenoid
and place on new Solenoid.
Fittings
Needle Valve
Knob
Toggle Valve
(x3)
Needle Valve
(x2)
Outer
Nut
Figure 10
Inner
Nut
Foot Switch
Cable
Connector
Motor Receptacle
Cable Connector
Foot Switch
Receptacle
Motor
Receptacle
Ground
Stud
Figure 11
Two-Way
Solenoid
(Water)
Fitting