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TR2/3/3A TR3 gear box shaft selectors

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Tinkerman

Tinkerman

Darth Vader
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Is there any good reason to remove the shaft selectors? I have better selector forks that I am going to put in and I am in the process of cleaning everything but unless there is a compelling reason to remove them and clean those particular parts more throughly, I really don't want to do it.

By the way, ignore the verbiage on the picture.

Any thoughts would be appreciated

Tinkerman
 

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There are o-rings (oil seals) and ball-and-spring detents in the top cover assembly that bear examination. The o-rings, at least, are likely to be worth replacing.
 
In your photo, the shifters look very dry. Mine are always very oily. Maybe mine are leaking oil. Maybe yours don't need the seals changed. Mine shift smooth as silk. Is it because they were designed properly or because of the oil. I plan some day (maybe in about 5 years or so) to put in the new o-rings I bought 5 years ago. But it sure shifts smoothly.
 
Mine look dry because they have been cleaned. I figure a goodly amount of grease or heavy oil is in order. o-rings will be replaced. Since my post I have cleaned them in a bath of mineral spirits (its what is in the parts cleaner) so I'm going to move on with the rebuild.

Thanks for your input, Tinkerman
 
Be sure to check that the new O-rings fit snugly in their counterbores with a little bit of pressure from the clamping plate. If they don't, they will leak. Herman van den Akker suggested brass, but I added teflon "backing washers" from MMC to mine.

Also be sure you get the shift lockout parts back in place. I've seen a top cover pretty badly damaged because one of the balls dislodged while inserting the shaft. The pin through the 3-4 shaft apparently got crosswise because the ball wasn't there to hold it in place.

Found a digital fish scale on sale at Big 5 that worked well for checking detent force.
 
Hi Randall, thanks for the tips. You do understand that I live in a SMALL Eastern Tennessee town, so my next question is whats a "Big 5" ?

Oh, also what are the steps you took to check the detent force? I found nothing in the big manual about that item. Another manual talks about fitting a spring scale to the gearlever ends of the selector shaft and checking the detent force in that fashion. Is that basecally how you did it?

Thanks, Tinkerman
 
Tinkerman said:
Hi Randall, thanks for the tips. You do understand that I live in a SMALL Eastern Tennessee town, so my next question is whats a "Big 5" ?
Click to expand...
Sorry bout that ... "Big 5" is a discount sporting goods chain in the western US. They frequently run "loss leaders", items for sale at or below their cost, just to get people inside the store (where hopefully they'll buy something else).
https://www.big5sportinggoods.com
No idea what the equivalent would be where you are.
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]Another manual talks about fitting a spring scale to the gearlever ends of the selector shaft and checking the detent force in that fashion. Is that basecally how you did it?[/QUOTE]Yup, that's the idea. Sorry, no photos, maybe next time.
 
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