Mag switch rebuild?

How to keep the Cessna 170 flying and airworthy.

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3958v
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Mag switch rebuild?

Post by 3958v »

My original mag switch is failing to ground and I was wondering if anyone here has ever taken one apart and rebuilt it. I still have a factory switch which is keyed the same as my doors and I kind of hate to just throw a new one from Bendix in. Bill K
Polished 48 170 Cat 22 JD 620 & Pug
Tom Downey
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Post by Tom Downey »

You should be able to bend the tabs up and remove the back of the switch, clean it with electronic cleaner and polish the contacts and be good to go. do not mess with the tumblers in thhe front of the key lock.
Tom Downey A&P-IA
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3958v
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Post by 3958v »

If anyone knows of a source for a new or good used mag original mag switch I would appreciate the help. I have a Bendix but that is not original and mine was breaking up inside to the point of being almost impossible to rebuild. Bill K
Polished 48 170 Cat 22 JD 620 & Pug
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N1478D
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Post by N1478D »

Per LPM:

Bendix started making ignition switches in 1947.

Any TCM distributor should have one, or a repair kit. P/N 10-357510 might work, but be sure and check on that kit P/N, I am not absolutely sure that kit is what goes with your switch.
Joe
51 C170A
Grand Prairie, TX
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GAHorn
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Post by GAHorn »

'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons. ;)
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3958v
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Post by 3958v »

I re read my post and see that it was not really clear. I actually have the Bendix to use as a repacement for my original (manufacturer unknown) switch. I was trying to avoid installing the new Bendix switch because my old mag switch was keyed the same as my doors. That said the actual Keyed part is seperate from the mag switch so any original mag switch from an original 48 170 will work. I know looking for an original switch is a long shot but I had to give it a try as I have a very original 170 and I am trying to keep it that way as much as possible. Thanks for your help guys. Bill K
Polished 48 170 Cat 22 JD 620 & Pug
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GAHorn
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Post by GAHorn »

Bill this is not as difficult as it might first appear. Any qualified locksmith can adjust your switch to your key. If possible, take both switches to your locksmith so he can swap the tumblers.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons. ;)
Watkinsnv
Posts: 187
Joined: Tue Apr 23, 2002 1:55 am

Bendix Mag switches

Post by Watkinsnv »

This isn't the Traders section but i've got two stock Bendix mag switches i'll let go for $75.00 EA and that includes shipping. Lance
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