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To verify the
scaler
, switch the SCALER/MOTOR
selector switch (Fig. 5) to SCALER. With a tip on the
scaler, turn the coolant toggle to the ON position and
open the coolant flow prior to stepping on the pedal.
Step on the pedal and place the tip on a piece of metal
(penny, etc.) and verify that fluid is present and a high
pitch noise is present. Note: If the motor coolant
ON/OFF toggle switch is in the ON position, a small
amount of water will be present at the handpiece due to
the switching of the three way solenoid for the
motor/scaler.
The above describes a basic inspection and verification
of the AEU-425CF/CFH system. If the unit still does
not perform as required, further diagnosis of compo-
nents in the system may require service Use the Trouble
Shooting section as a guide to symptoms and appro-
priate procedures to fix various problems.
Cleaning and Lubrication
When servicing the AEU-425CF/CFH Military Dental
System, the parts of any component disassembled
should be thoroughly cleaned and inspected before re-
assembly. A hot detergent solution is an effective
cleaner on all non-electrical parts. Flush all non-
electrical parts with clear, hot water. Abrasive cleaners
have the potential to damage surface finishes and
should be avoided. Any wiping should be done with a
soft, lint free cloth.
Electrical parts should be cleaned with an appropriate
electrical parts cleaner or air.
CAUTION
: Use only NON-foaming cleansers in the
vaccum lines.
Use a silicone base lubricating grease, such as Dow
Corning No. 103 to lubricate O-rings, oral evacuator
valves, and seals in the system. Before performing any
reassembly of parts that contain O-rings or seals, apply
a light coat of silicone grease. This will make installa-
tion easier and prevent the O-rings or seals from being
damaged.
WATER LINES - Prepare a 1:10 bleach solution (1 part
household bleach to 9 part water). Remove water reser-
voir and discard residual water. Replace empty water
reservoir and air purge all waterlines. Fill water reser-
voir with bleach solution. Run bleach through all lines.
Allow bleach solution to stand in lines for 10 minutes.
Remove water reservoir and discard bleach. Flush all
lines thoroughly with clean water. Air purge and leave
the lines dry until the next use.
The system has two ways of removing moisture from the
air. A removable air chamber and a drainable filter
prior to the syringe. To remove condensation from the
air bottle, discharge the system and remove the air
bottle and shake out the condensation. To remove
moisture from the
filter, open the valve
on the filter in the
rear left corner of the
plumbing
chassis
(Fig. 4). Air filter
requires replacement
if it becomes clogged
and restricts air flow.
Vacuum waste container lids should be sealed and hold-
ing a vacuum when in operation. HVE solids collector
screen should be inspected for blockage and cleaned or
replaced if necessary. Waste sensor operation can be
checked by turning HVE vacuum on and tilting waste
containers upside down individually and verifying that
the motor turns off and waste full indicator light comes
on.
To verify the
electric handpiece motor
, first connect
motor to motor receptacle and connect a handpiece to
motor. Place a bit into the handpiece and secure. Switch
the SCALER/MOTOR selector switch on the electrical
chassis to MOTOR (see Figure 5). Turn the coolant
toggle to the OFF position. Step on the foot pedal and
verify that the motor is running. Press the reverse
button and verify that the buzzer is on and the drill has
reversed direction. To check for water, use a handpiece
with a water connector or check the motor to confirm
that water is coming from the stem. Turn the coolant
toggle to the ON position and adjust the coolant flow to
open prior to stepping on the foot pedal. Verify that
water is coming out the tube.
Figure 5
Selector Switch
Inspection and Operation Verification -
Cont’d
Figure 4
Air Filter
Drain
Valve