<h2 style="text-align:justify">Lares Perfect Finish 20K Troubleshooting Guide</h2>

&nbsp;

Since Perfect Finish is built to run four different attachments on one motor, troubleshooting starts with narrowing down whether the problem is the motor itself or whatever&#39;s currently attached to it. Working through that first saves time on everything else in this guide.

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Warning Signs

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<ul>
	<li>
	Attachment (1:1 or 4:1, contra angle or straight) feels loose or won&#39;t seat
	</li>
	<li>
	Bur won&#39;t lock securely in the push-button latch head, or drops during use
	</li>
	<li>
	Swivel feels stiff or resists smooth rotation
	</li>
	<li>
	Noticeably reduced power or torque
	</li>
	<li>
	Unusual noise or vibration during operation&nbsp; &nbsp; &nbsp; 
	</li>
</ul>

&nbsp;

<a href="https://repair.dental/print-shipping-label/handpiece-repair">Print Shipping Label</a>

&nbsp;

<h2 style="text-align:justify">Symptom, Cause &amp; First Step</h2>

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			Warning Sign
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			Likely Cause
			</td>
			<td style="background-color:#1a1a1a; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #1a1a1a; border-top:1px solid #1a1a1a; width:267px">
			First Step
			</td>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td style="background-color:white; border-bottom:1px solid #b9b9b9; border-left:1px solid #1a1a1a; border-right:1px solid #b9b9b9; border-top:none; width:217px">
			Attachment loose/won&#39;t seat
			</td>
			<td style="background-color:white; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #b9b9b9; border-top:none; width:267px">
			E-type coupling wear or debris
			</td>
			<td style="background-color:white; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #1a1a1a; border-top:none; width:267px">
			Clean coupling, try a different attachment
			</td>
		</tr>
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			<td style="background-color:#f1f1ef; border-bottom:1px solid #b9b9b9; border-left:1px solid #1a1a1a; border-right:1px solid #b9b9b9; border-top:none; width:217px">
			Bur won&#39;t lock/drops
			</td>
			<td style="background-color:#f1f1ef; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #b9b9b9; border-top:none; width:267px">
			Push button chuck wear (attachment)
			</td>
			<td style="background-color:#f1f1ef; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #1a1a1a; border-top:none; width:267px">
			Clean chuck, re-test with a known-good bur
			</td>
		</tr>
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			Swivel stiff
			</td>
			<td style="background-color:white; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #b9b9b9; border-top:none; width:267px">
			Coupling debris or wear (motor)
			</td>
			<td style="background-color:white; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #1a1a1a; border-top:none; width:267px">
			Clean swivel; use Handpiece Conditioner
			</td>
		</tr>
		<tr>
			<td style="background-color:#f1f1ef; border-bottom:1px solid #b9b9b9; border-left:1px solid #1a1a1a; border-right:1px solid #b9b9b9; border-top:none; width:217px">
			Reduced power/torque
			</td>
			<td style="background-color:#f1f1ef; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #b9b9b9; border-top:none; width:267px">
			Internal motor wear
			</td>
			<td style="background-color:#f1f1ef; border-bottom:1px solid #b9b9b9; border-left:none; border-right:1px solid #1a1a1a; border-top:none; width:267px">
			Compare against known performance when new
			</td>
		</tr>
		<tr>
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			Noise or vibration
			</td>
			<td style="background-color:white; border-bottom:1px solid #1a1a1a; border-left:none; border-right:1px solid #b9b9b9; border-top:none; width:267px">
			Internal bearing/gear wear
			</td>
			<td style="background-color:white; border-bottom:1px solid #1a1a1a; border-left:none; border-right:1px solid #1a1a1a; border-top:none; width:267px">
			Stop use; don&#39;t continue running it
			</td>
		</tr>
	</tbody>
</table>

&nbsp;

<h2 style="text-align:justify">User-Safe Checks You Can Do First</h2>

&nbsp;

<ol>
	<li>
	Swap in a different, known-good attachment to isolate whether the issue follows the motor or the attachment.
	</li>
	<li>
	Clean the E-type coupling and swivel before assuming internal motor wear.
	</li>
	<li>
	Confirm your air pressure supply is within normal range, since supply issues can mimic internal power loss.
	</li>
	<li>
	Run the motor briefly without an attachment to check for noise or vibration independent of whatever&#39;s mounted.
	</li>
</ol>

&nbsp;

&nbsp;

Related Readings from RepairGuru :

&nbsp;

<ul>
	<li><a href="https://repair.dental/repairguru/pan-and-ceph-xray-machine/common-issues-with-dental-x-ray-machines">Common Issues with Dental X-Ray Machines</a></li>
	<li><a href="https://repair.dental/repairguru/pan-and-ceph-xray-machine/essential-maintenance-tips-for-extending-dental-x-ray-longevity">Essential Maintenance Tips for Extending Dental X-Ray Longevity</a></li>
</ul>

&nbsp;

&nbsp;

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			Stop Using It If...

			&nbsp;

			You notice unusual noise or vibration. Given this motor is specifically built for smooth, quiet operation, any deviation from that is a signal worth acting on.

			&nbsp;

			An attachment doesn&#39;t seat securely and stay secure. Inconsistent retention during a procedure isn&#39;t something to work around.
			</td>
		</tr>
	</tbody>
</table>

&nbsp;

<h2 style="text-align:justify">When It Needs a Professional</h2>

&nbsp;

Attachment swaps, coupling cleaning, and chuck maintenance are all things a practice can do chairside. Confirmed internal motor wear, persistent power loss after ruling out the attachment and air supply, or ongoing coupling looseness after cleaning are jobs for a technician&nbsp; and Club Lares members should check whether their repair is covered before paying out of pocket.

&nbsp;

<h2 style="text-align:justify">What Practices Are Saying</h2>

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			★★★★★&nbsp; We chased a power loss issue for weeks assuming the motor was failing. Swapping the contra angle attachment solved it instantly.

			&nbsp;

			&mdash; Lead Dental Assistant, General Dentistry Practice
			</td>
		</tr>
	</tbody>
</table>

&nbsp;

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			★★★★★&nbsp; Vibration on one of our Perfect Finish motors was the first sign something was wrong. Glad we caught it early instead of pushing through a full day on it.

			&nbsp;

			&mdash; Office Manager, Solo General Practice
			</td>
		</tr>
	</tbody>
</table>

&nbsp;

<h2 style="text-align:justify">FAQs</h2>

&nbsp;

My Perfect Finish motor works fine with one attachment but not another. Is that normal?

It points toward the specific attachment rather than the motor. Inspect and clean that attachment&#39;s chuck and coupling interface before suspecting the motor itself.

&nbsp;

Is some swivel resistance normal, or should it always turn freely?

The 360&deg; E-type swivel is designed to turn freely and reduce hand fatigue; noticeable stiffness is a maintenance or wear signal, not expected behavior.

<hr />
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Warning signs and safe checks for Lares Perfect Finish 20K problems  know when to stop use and call for repair

Lares Perfect Finish 20K Troubleshooting Guide | Repair.Dental