[TR] TR3A Odd overdrive behaviour

[Art McEwen]

I think we were both right.

When I got home last night the battery was flat, boosted it and it fired 
right up but the generator wasn't charging.   The small yellow/green 
wire off the generator, which is far too close to the exhaust manifold 
didn't feel right.   Re soldered it (added extra heat shield) and I'm 
back in business.   Oddly enough so is the overdrive.   Careful 
inspection of the wiring diagram shows the O/D switch is fed off the 
ammeter, no ammeter, no O/D.

I assume there was just enough of a connection to allow for the switch 
to operate until the exhaust manifold got up to temp and fried the 
connector, let it cool down and the smoke would flow again.


On 8/1/2011 4:26 PM, Bud Rolofson wrote:
> When a problem doesn't exist, then exists, then once again doesn't 
> exist...thats intermittent in my book.  Electric systems can very 
> easily act this way as bad connections and wires wiggle or get hot or 
> cold.    But everyone has their own ideas.
>
>
> Bud Rolofson
>
> 71TR6 CC57365 (Good 6)
> 66TR4A CTC57806 (The Wreck-Almost parts)
> 66TR4A CTC57529 (The Project)
> 71F-250 Camper Special (Triumph Support Vehicle)
> Z-50A Hardly Davidson 1977 Honda Mini-Trail Bike (Triumph Pit Bike)
> levilevi at comcast.net
>
>
>
>
> On Aug 1, 2011, at 2:01 PM, Art McEwen wrote:
>
>> I'll look at the connections while I'm at it but at this point it's 
>> not an intermittent problem, it's very predictable and consistent, 
>> which usually means the electrics are fine ;)
>>
>> On 7/31/2011 7:24 PM, Bud Rolofson wrote:
>>> A cleaner attempt at a fix might be checking your OD switch.  You 
>>> might have a bad connection, e.g. a broken solder connection or a 
>>> fatigued wire on or running to the switch.  The switch is a prime 
>>> location for intermitant problems.
>>>
>>> Bud Rolofson
>>>
>>> 71TR6 CC57365 (Good 6)
>>> 66TR4A CTC57806 (The Wreck-Almost parts)
>>> 66TR4A CTC57529 (The Project)
>>> 71F-250 Camper Special (Triumph Support Vehicle)
>>> Z-50A Hardly Davidson 1977 Honda Mini-Trail Bike (Triumph Pit Bike)
>>> levilevi at comcast.net
>>>
>>>
>>>
>>>
>>> On Jul 31, 2011, at 2:07 PM, Art McEwen wrote:
>>>
>>>> The last couple of drives the first time I engage overdrive it 
>>>> works like a charm, but if I disengage it (be it 5 minutes or 25 
>>>> minutes later) it won't reengage.   If I stop, even for only 5 
>>>> minutes it's fine, but again, only once.
>>>>
>>>> The gearbox oil was a bit low so I topped it up and that didn't 
>>>> change it.  I'm not stopping long enough for it to cool down so 
>>>> it's not likely heat.  If I drive without it for a while then try 
>>>> it doesn't engage so it's not like the solenoid is heating/cooling.
>>>>
>>>> What do you think solenoid or internals?
>>>>
>>>> I'm going to check the filter screen and re-top it up because it's 
>>>> been awhile since I've had warm 30weight running down my arm.
>>>>
>>>>
>>>> triumphs at autox.team.net
>>>>
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