Horn Works, BUT!!

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BLB27
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First Name: Bruce
Last Name: Brakke
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Horn Works, BUT!!

Post by BLB27 » Fri Sep 11, 2020 7:38 pm

I have a 6v motor horn made by E.A. Laboratories. It is Model F. It had not been run in 60 years. I took the top cap off and oiled the armature shaft top and bottom. I connected it to a new 6v battery, and it works. However, sometimes the armature won't turn. If I move it just slightly, it works. The is a adjustment screw on the cap, which I assume is to change the sound. ANY THOUGHTS ON WHAT THE PROBLEM IS AND HOW TO FIX IT ?


Kevin Pharis
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Re: Horn Works, BUT!!

Post by Kevin Pharis » Fri Sep 11, 2020 8:08 pm

Sounds like maybe dirty armature/brush surfaces...? See if you can sand the contact faces to freshen em up


Adam
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Re: Horn Works, BUT!!

Post by Adam » Sat Sep 12, 2020 9:25 am

1 defective solder joint or broken wire between commutator and armature.


Norman Kling
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Re: Horn Works, BUT!!

Post by Norman Kling » Sat Sep 12, 2020 11:16 am

The adjustment screw will allow the armature to spin more freely and also change the sound of the horn. It should be just tight enough to hear a good honk, but still be able to turn easily.
Norm


Topic author
BLB27
Posts: 101
Joined: Thu Jul 23, 2020 9:28 pm
First Name: Bruce
Last Name: Brakke
Location: Ames, Iowa
MTFCA Number: 31192

Re: Horn Works, BUT!!

Post by BLB27 » Sat Sep 12, 2020 9:24 pm

IT WORKS!! I did three things: 1) Tightened a screw that was loose holding one of brushes. I could see the brush move. 2) Loosened the adjusting screw until the sound stopped and the tightened it until it gave a good sound. 3) Sprayed some brake cleaner on the motor and then blew it with air. I don't know which one worked, maybe all three!


Topic author
BLB27
Posts: 101
Joined: Thu Jul 23, 2020 9:28 pm
First Name: Bruce
Last Name: Brakke
Location: Ames, Iowa
MTFCA Number: 31192

Re: Horn Works, BUT!!

Post by BLB27 » Mon Sep 14, 2020 2:41 pm

Painted it, looks very nice. Sounds great! Is this Model F by E.A. Laboratories a Ahooga horn? Another question: Does it matter which terminal on the horn is connected to battery positive?


























L

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jsaylor
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Re: Horn Works, BUT!!

Post by jsaylor » Mon Sep 14, 2020 3:45 pm

Polarity might make a difference in which way the motor rotates. Test it out. see if any differences.

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