A dec 400
A dec · Model 400
Ergonomic tilt. Helps you maintain the natural curve of your back reducing strain and fatigue. Large, anatomically-shaped backrest. Hugs the lower back. Easy-to-reach levers. Allow incremental or dynamic hip angle adjustments and seat height adjustment. Rolled edge. Helps reduce pressure on the legs and allows for proper circulation. Two cylinder heights (A-dec 400 doctor’s stool). Measure from hips to the feet. Above 32" - choose tall cylinder. Under 32" - choose short cylinder. Height-adjustable foot ring (A-dec 400 assistant’s stool). Helps assistant maintain correct posture. Adjustable torso support (A-dec 400 Assistant’s stool). Easily locks in place and can be converted for left or right-handed operators.
Key tips
- ·Biological-indicator verification applies to dental sterilizers exactly the same as hospital CSSD - no exception for smaller units.
- ·"Sounds different" is often the first real report of handpiece bearing wear, not an outright failure - investigate early rather than waiting.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Handpiece turbine wear
MediumSymptoms: Low RPM, noise, poor cut.
Root cause: Bearing/turbine wear.
Compressor fault
MediumSymptoms: Low air pressure, moisture.
Root cause: Worn compressor / dryer.
Foot control failure
LowSymptoms: No/erratic activation.
Root cause: Fluid ingress / worn switch.
Curing light LED fade
LowSymptoms: Weak cure, low intensity.
Root cause: LED aging.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
Curing light LED head
Class Periodic replacementRel. cost $$R&R Fairly easy
Handpiece turbine / cartridge
Most-replaced; track autoclave cycles.
Class Frequent wear itemRel. cost $$$R&R Moderate
Air compressor & dryer
Class Periodic replacementRel. cost $$$R&R Difficult
Foot pedal
Class Periodic replacementRel. cost $$R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Curing light LED head | Periodic replacement | $$ | Fairly easy |
| Handpiece turbine / cartridge Most-replaced; track autoclave cycles. | Frequent wear item | $$$ | Moderate |
| Air compressor & dryer | Periodic replacement | $$$ | Difficult |
| Foot pedal | Periodic replacement | $$ | Fairly easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily handpiece lubrication and autoclave cycle verification
- ·Compressor moisture-trap draining
- ·Annual full PM
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Handpiece turbine wear
- Confirm the presentation - typically low RPM, noise, poor cut - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: bearing/turbine wear.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the handpiece turbine / cartridge per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Compressor fault
- Confirm the presentation - typically low air pressure, moisture - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: worn compressor / dryer.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the air compressor & dryer per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Dental operatory
- Oral surgery suite
- CSSD (dental sterilizers)
Documents & Manuals
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