[TR] Yeah, I know, the Overdrive...Again....

[Andrew Uprichard]

Thanks for taking care of the planes my brother flew (even though “his” were in the RAF) !!

 

I have had a relay die.  Symptoms were as you describe, although your case is complicated by the slipping in and out, which does not sound like the relay.

 

Bottom line:  relays can fail and it is a simple and inexpensive thing to replace which does not require pulling the tunnel again.

 

Andrew Uprichard

 

From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of TERRY SMITH
Sent: Sunday, July 23, 2017 5:38 PM
To: triumphs at autox.team.net
Subject: [TR] Yeah, I know, the Overdrive...Again....

 

So the overdrive worked great on the day after I adjusted the linkage.  The next day, slipped in and out.  Fluid is topped off and am using Redline MT-90 per all recommendations.  The fuse is NOT blown, but when I test, I get no clunk of engagement nor snap from disengagement.  I've checked and rechecked all the wires leading in the system.  Joints are soldered, solid and insulated (shrink tubing).  

 

Except.

 

The relay.  I didn't even know I had one.  Leastwise, I'd forgotten since I first wired the thing a dozen years ago.  

 

Relays are simple mechanisms.  Looks like a resister, maybe a diode in there.  But diodes blow and resisters can die.  

 

Just curious, though.  It's been 50 years since I was working on comm/nav electronics on F4-Phantom jets so am not clueless, but definitely rusty, about electronics.  Are simple relays more or less bullet-proof, or do they have some sort of reputation I'm not aware of....????

 

Thank you, everyone,

Terry Smith, '59 TR3A, A-Type OD, TS 58667

New Hampshire

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