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I agree with everything that has been said, especially with regard to new brushes and using the seating stone.

Sharpie that fan housing seam and using something soft like plastic or wood...gently knock the two halves apart...rotating all around the housing so you're not just hitting in the same place. I would test the armature itself with a VOM...lots of youtube vids on how to do that. If it doesn't test out, I wouldn't go any further with it. Most of the vac supply outfits online have brushes. Armatures turn up on eBay but not always new.....gamble there unless new. If a member here can offer a new armature, jump on it!

On that thermistor, unless it's too tight, just pry open the original crimp, expose some new wire and recrimp. Soldering would be OK but makes the joint more rigid and more likely to break in the future. Hard to figure how that joint failed if it was relatively stationary in actual use.....I suspect previous dismantle forces. 

Brushes/commutator look bad and probably the cause of the sparking, although you need to stone the commutator as was said.

Kevin

<blockquote data-quote="real1shep" data-source="post: 384793" data-attributes="member: 2929">I agree with everything that has been said, especially with regard to new brushes and using the seating stone. Sharpie that fan housing seam and using something soft like plastic or wood...gently knock the two halves apart...rotating all around the housing so you&#039;re not just hitting in the same place. &lt;span style=&quot;font-size: 12pt;&quot;&gt;I would test the armature itself with a VOM...lots of youtube vids on how to do that. If it doesn&#039;t test out, I wouldn&#039;t go any further with it.  Most of the vac supply outfits online have brushes. Armatures turn up on eBay but not always new.....gamble there unless new. If a member here can offer a new armature, jump on it!&lt;/span&gt; &lt;span style=&quot;font-size: 12pt;&quot;&gt;On that thermistor, unless it&#039;s too tight, just pry open the original crimp, expose some new wire and recrimp. Soldering would be OK but makes the joint more rigid and more likely to break in the future. Hard to figure how that joint failed if it was relatively stationary in actual use.....I suspect previous dismantle forces. &lt;/span&gt; &lt;span style=&quot;font-size: 12pt;&quot;&gt;Brushes/commutator look bad and probably the cause of the sparking, although you need to stone the commutator as was said.&lt;/span&gt; &lt;span style=&quot;font-size: 12pt;&quot;&gt;Kevin&lt;/span&gt; &lt;span style=&quot;font-size: 12pt;&quot;&gt; &lt;/span&gt;</blockquote>

[QUOTE="real1shep, post: 384793, member: 2929"] I agree with everything that has been said, especially with regard to new brushes and using the seating stone. Sharpie that fan housing seam and using something soft like plastic or wood...gently knock the two halves apart...rotating all around the housing so you're not just hitting in the same place. I would test the armature itself with a VOM...lots of youtube vids on how to do that. If it doesn't test out, I wouldn't go any further with it. Most of the vac supply outfits online have brushes. Armatures turn up on eBay but not always new.....gamble there unless new. If a member here can offer a new armature, jump on it! On that thermistor, unless it's too tight, just pry open the original crimp, expose some new wire and recrimp. Soldering would be OK but makes the joint more rigid and more likely to break in the future. Hard to figure how that joint failed if it was relatively stationary in actual use.....I suspect previous dismantle forces. Brushes/commutator look bad and probably the cause of the sparking, although you need to stone the commutator as was said. Kevin [/QUOTE]

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