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  #1  
Old 05-27-2019, 07:52 AM
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Chipk Chipk is offline
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Default Repairing broken coils (mouse ears)

Charly-In-Ct-Ri inFebruary posted a brilliant repair for broken mouse ears. A;l credit goes to him. I just tweaked his ideas.

No matter how careful I am kneeling and standing I somehow managed to break a half dozen expensive coils. I tried repairing them with nylon washers and even glueing them on before using them.

They still broke.

So I was enthusiastic in trying his repairs. But they centered around plastic electrical boxes that he cut and reshaped using PVC glue and primer. But I could never find the right size. They were always too large.

Well one day I was wandering through Home Depot and found myself on the PVC aisle and saw some joints and connectors that looked like they might work. So I bought several sizes and headed to my garage.

First I selected a coil and with my Drexel I started carefully slicing away the broken ears. Then I took my sander and smoothed it off. I then selected the right size cap and placed it on the coil and it looked like there was adequate surface area to support it.

Next I measured where to drill the holes and after using 4 different sized drill bits I had the right holes. But after connecting everything I realized there was still too much play. So I began adding nylon washers until I had a good combination for a snug fit.

I wanted to be able to have a little vertical play with the shaft so I took the Drexel and cut a space in the cap at the back. A little use of the sander smoothed up the edges. Then I also sanded the bottom of the connector to rough up the surface so the PVC glues will hold better.

Then I painted it. Mostly to hide my poor craftmanship.

I first used PVC Primer and then PVC glue to attach the 2 pieces. Always add the adhesives on both pieces. I let it sit overnight.

The next morning I tried to break the bond but it seems strong.

Itís a bit of a challenge to hook up the bolt, coil and washers because itís a tight fit but perseverance will make it happen. A foam sealant might help if thereís too much play but this seems to be what I need.

I took my Garrett ATPro with the patched 5x8 coil out yesterday and today. I was cautious at first but before long I forgot I was using a broken coil. No problems and I even found a few things.
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  #2  
Old 05-27-2019, 09:50 AM
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HDMontana HDMontana is offline
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Nice job on the repair. Could you post a picture of the shaft connected to the new PVC piece?

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  #3  
Old 05-27-2019, 01:47 PM
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Chipk Chipk is offline
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Default Hooked up and ready for action

Originally Posted by HDMontana View post
Nice job on the repair. Could you post a picture of the shaft connected to the new PVC piece?

Sent from my SM-T580 using Tapatalk

Soitenly.
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Old 05-28-2019, 12:23 AM
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HDMontana HDMontana is offline
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Looks good. Thanks for the extra pictures.

HD
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  #5  
Old 05-28-2019, 09:58 AM
Charly-in-CT-RI Charly-in-CT-RI is offline
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Great job. I bet it is stronger then the original ears. My repair was on a Dual Field (water hunting machine) and it is still holding up even with all of the water resistance.

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  #6  
Old 06-04-2019, 02:57 AM
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Saoirse Saoirse is offline
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Nice work, looks pretty sturdy!

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