<h2 style="text-align:justify">KaVo MASTERmatic M07 L Troubleshooting: Diagnosing a Dual-Purpose Green Ring</h2>

&nbsp;

With the KaVo MASTERmatic M07 L, the first clue is often what it was last used for. A gritty feel after prophylaxis points somewhere different than a slipping bur after excavation.

This guide uses that context to speed up diagnosis.

Safety first: stop if a bur or attachment is not secure, or the head runs hot.

&nbsp;

<h2 style="text-align:justify">What Was It Last Used For?</h2>

&nbsp;

<ul>
	<li>
	After prophylaxis: grit or stiffness may point to paste residue.
	</li>
	<li>
	After excavation: bur grip or roughness may point to chuck or head wear
	</li>
</ul>

&nbsp;

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

&nbsp;

<table align="center" cellspacing="0" style="border-collapse:collapse; width:900px">
	<thead>
		<tr>
			<td style="background-color:black; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:158px">
			Symptom
			</td>
			<td style="background-color:black; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:192px">
			After Prophy?
			</td>
			<td style="background-color:black; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:200px">
			After Excavation?
			</td>
			<td style="background-color:black; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:1px solid black; vertical-align:top; width:230px">
			Safe Check
			</td>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:158px">
			Gritty feel
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:192px">
			Likely paste residue
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:200px">
			Less likely
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:230px">
			Clean thoroughly, lubricate
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:158px">
			Bur slips
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:192px">
			Possible
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:200px">
			Likely chuck wear
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:230px">
			Fresh bur; head swap
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:158px">
			Dim light
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:192px">
			Either
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:200px">
			Either
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:230px">
			Try another LUX motor
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:158px">
			Weak spray
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:192px">
			Either
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:200px">
			Either
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:230px">
			Change filter; clean channels
			</td>
		</tr>
		<tr>
			<td style="background-color:#f2f2f2; border-bottom:1px solid black; border-left:1px solid black; border-right:1px solid black; border-top:none; vertical-align:top; width:158px">
			Warm head
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:192px">
			Either
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:200px">
			Either
			</td>
			<td style="background-color:white; border-bottom:1px solid black; border-left:none; border-right:1px solid black; border-top:none; vertical-align:top; width:230px">
			Check spray; stop if warm
			</td>
		</tr>
	</tbody>
</table>

&nbsp;

<h2 style="text-align:justify">Gritty or Stiff After a Prophy Application</h2>

&nbsp;

Clean all paste off and lubricate with KaVo Spray or the QUATTROcare PLUS. If the feel remains, residue may be inside the head.

Grit that will not clear? Send your M07 L to Repair.Dental.

&nbsp;

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

&nbsp;

Try a fresh bur. Then swap in a spare INTRA LUX head if you have one. If the new head fixes it, the original head needs service.

&nbsp;

<h2 style="text-align:justify">Spray and Light</h2>

&nbsp;

Change the filter and clean nozzles with KaVo&#39;s needles, as KaVo&#39;s care tips advise. Test the light on another LUX motor.

When to Stop

<ul>
	<li>
	A bur that will not stay secure
	</li>
	<li>
	Heat at the head
	</li>
	<li>
	Grit or roughness after cleaning and lubrication
	</li>
</ul>

&nbsp;

&nbsp;Related Readings from RepairGuru :

&nbsp;

<ul>
	<li style="text-align: justify;"><a href="https://repair.dental/repairguru/lab-scanner/small-object-scanning-fixturing-methods">Small Object Scanning: Fixturing Methods</a></li>
	<li style="text-align: justify;"><a href="https://repair.dental/repairguru/lab-scanner/wax-up-scanning-material-reflectivity-issues">Wax-Up Scanning: Material Reflectivity Issues</a></li>
	<li style="text-align: justify;"><a href="https://repair.dental/repairguru/lab-scanner/impression-scanning-direct-vs-poured-model">Impression Scanning: Direct vs Poured Model</a></li>
</ul>

&nbsp;

&nbsp;

<a href="https://repair.dental/print-shipping-label/handpiece-repair">Start Your Repair</a>

&nbsp;

<h2 style="text-align:justify">M07 L Troubleshooting FAQs</h2>

&nbsp;

Why does my M07 L feel gritty?

Often paste residue after prophylaxis use. Clean and lubricate; if it remains, have it checked.

&nbsp;

Why is my bur slipping?

Try a fresh bur and a spare head to find out whether the head chuck is worn.

&nbsp;

<hr />
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KaVo M07 L gritty, slipping, dim or spraying weakly? Troubleshoot the 2.7:1 green contra-angle for excavation and prophylaxis use.

KaVo MASTERmatic M07 L Troubleshooting | Repair.Dental