The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: Tumbleweed on 02.05. 2012 14:22
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hi everybody, ive just had the front of my gearbox off to check for obvious signs of wear, the box is in neutral (i am not sure if it should be ), and place the inner cover even tighten it down with tubes as muskrat said in a earlier post, but cant get the selector pawl to engage the cam plate, i must be doing something wrong i have tried lots of times , it selected before i had the covers off , any ideas *sad2*, tw
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Hi Tumbleweed, i suffered the same when I rebuilt my box but with help from these guys it was sorted.Are you linning up the dots on shaft and inner case ? I tried for several weeks to get the gears in sync my problem was that the dots on the inner case were wrong and I had to use a slightly higher position for the pawl to engage ,once done the box was beautiful no probs since ,interestingly the guy who told me about this had had the same prob anyway hope that is of some help but I'd hide the heavy hammers until you sort it they can be bloody awkward Best wishes Bobh
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G'day tw,
they can be awkward. Have you used a new gasket that might be a tad thicker than the old one? Try it with no gasket and silastic.
Make sure the pawl rocks easily and returns to center. A little bit of wear in a few places add up to it not being a nice fit as it once was. Also back off the detent spring a couple of turns.
Cheers
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you don't mention indexing TW, you need to line up the red dot on the selector with the red dot on the inner cover.
Apologies if this has been done, just you don't mention it
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thanks everyone, i am glad there is a way of fitting, the only thing is i cant find any dots or marks on the cover or the shaft , are they on the inside of the inner cover, or the outside ? *conf*
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Hiya TW, I no longer have one of these boxes, but here the haynes book :! is jogging my memory a bit.
There is a(should be RED) dot (indent) on the inner cover behind the shifter shaft bush immediately in front of the selector quadrant, which should have a corresponding(should be RED) dot(indent) stamped in it's forward face, these RED dotsmust align.
That's about all I can do, good luck duTch
ps any probs, maybe snap off and post a photo
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thanks dutch, i think weve read the same manual, it doesnt give any info about the gearbox i have, there is no quadrant as such just a lever with a 2 tooth moving pawl at the end it must be a very early box. tw
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Hi Tumbleweed, if no dots it has to be trial and error , which is a b### ache but can be done ,I think I read that RR2 boxs with reverse camplate don't have dots . i've an inner csae in my garage so i'll take a picture and try to post it tonight it'll show you where to look and it's position in relation to the case hope thats of help, regards BobH
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TW, I could be wrong,but, if you have
lever with a 2 tooth moving pawl at the end
, and a 'ball on the outside?
Then it sounds like a plunger box, and should go together easy, nothing complicated to line up,as such see photos.
(http://24042012637.jpg)(http://04052012656.jpg)
You should be able to see at least one of the 'grabby things' in red/greenand look like yours (I've coloured them),only thing I can think of in that case maybe is if the selector plate moved around inside,ensure you can see the 'grabby things'on the back of selector plate, and you need to jiggle the selector arm a bit and the cover will just slip on??
I hope that makes at least a bit of sense? As Muskrat says back off the indent plunger,
good luck duTch
ps what year, S/A ..? Plunger?
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hi dutch ,& topdad. yes its a 55 plunger box, i cant get pics to come up on my computer, the info i have received up till now is very helpful and i thank you all , i shall proceed with renewed vigor , and keep the big hammer away from the bench . i am sure if i could get pics it would help even more , thanks *smiley4* . tw
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Hi Dutch... Can you have a look at your pictures, I've noticed on a couple of your post in other threads where the pictures are not showing. I cant help as I don't have a clue what http://04052012656.jpg is. Have a read here >> to help you along.
http://www.a7a10.net/forum/index.php/topic,427.0.html
Cheers. LJ.
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Sorry TDub, I guess The pictures didn't load, must've done something wrong-at 3am my time you get that,they not too good anyway .
Did anothery-the correct way! (http://) Just check that you can see the 'pawls bits' on the back of selector plate(aka 'grabby things'), they're not really red&green just did so you can see them.
So if you've screwed out the camplate plunger, couple of things I forgot - Is the mainshaft in place, all gears meshing ok, or is the mainshaft in the inner cover, if this is the case it may not be going on the bearing straight-it's a good snug fit anyway?
I think I found it easier to put the shaft in the cover first.
Also is the box in or out of the bike?
1>MAKE SURE the layshaft 1st gear plain thrust washer for is inboard of the gear, otherwise it'll rattle(dogs trying to engage) in the top 3 gears and lock up in 1st, also as Muskrat said you need to make sure you have the corrct gasket as it affects the end float on the layshaft
2> ensure the selector fork rod engages with it's bush, and the selector arm is reasonably on the same plane as the shafts
3> probably something I've forgotten
4> make sure you're holding your tongue the right way, and just jiggle the show around-
(no hammers) well I've used a rubber mallet lightly!
ok go to it and good luck
Um Thanks LJ just posting now, I was a dumbass and did it wrong last night 3am as explained should work now different(1)photo-maybe
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G'day tw,
the plunger box's don't have dots. Hold the selector arm horizontal while sliding the cover on. A little out either way won't hurt, the pawl should find it's spot.
Cheers
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Thanks Musky, meant to say that (think that was #3)and pretty much disregard everything in the Haynes book too. Reason I said 'on the same plane' ,was because am not sure if the box is in or out, in which case(out) it can be done with the shafts vertical, or I think I did mine laying on the G'box/crankcase interface because the selector arm flaps around too easily.
ok friday night, goin' for feed &/or bevvie will see how T.weeds is coping later (no hammers)
*beer*
Ps T.W. If you can't see any of the pawls on the case side of the selector cam-plate, any where between top to bottom you may have it orientated incorrectly, just a matter of slip the selector forks out of their slots and spin the camplate until you can see at least two pawls top or bottom- best in the middle so you can see all three -just down from top should be close to neutral (I think because this camplate has 2 neutral nicks,disregard)
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hi its done now thanks to you chaps , i hope you enjoyed your feed and bevvy dutch (did you go on the bike?). thanks again everybody . p/s i can get all 6 gears now *smiley4*
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Hold up Mr Weeds- *eek* 6 (six) gears......???..... ???
Ah yeah gave up on food, had a slice of Pizza Ran inta ol'mate had a small bottle of jackD that I don't usually, saw lots of pretty girls,listened to some music, had some *beer*,tripped over a poof (one of those things that you put yer feet on to relax)chuckin' my mates-mate out of a dodgy bar, oh yeah went on the bike but stripped a gear cable last night in a storm stuck in top gear had to pedal harder----> all 6(six) gears ??? you got more toes or fingers or somethin' than me or did you fail grade one?? or got a 'special' box like a quaife 6 speed??? don't matter, if it works that's good......6? - 4gears + 1 neutral =5, *dunno* uhoh you got an extra neutral too ? + = 6. sorted=happy but, please explain 6
or do you just have a dodgier humour than me?? sorry this's doing my head in maybe tomorrow will be different
PS go easy on me admin-this is not my doing
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Photos okay now Dutch.... much better!
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just joking dutch *smiley4*
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Thought as much, *clap* it's the kind of thing I'd come up with myself- so you must've got your tongue right :P
But have you been out and road tested, not forgetting oil, otherwise it can't leak?
What was actually the cause of the grief?
Ok jobs done (no hammers!), good luck,
Never really thought I'd find myself helping put a gearbox together on the other side of the planet by remote control! javascript:void(0);
Beam me up Scotty!!!
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the gearbox was joind to the engine i have just bought , bolts gearbox to engine were newish, and gasket sealer around the casings,aroused my intrest ive never tackled a gearbox before ,it seems to be working ok now , ive had a rebore and new pistons, im painting the frame and tinwork now , so it will be a while before i can road test it so its fingers crossed . thanks again chaps
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Six-speed Weeds,
Sounds like about the same stage as me except I just realised it's a friggin'public holiday in UK too.
can't even circumvent the email process with a phone call to procure pushrods, have to wait another day, but no matter will be tied up on a work gig now for a month.
Good it seems ok that's about all I can determine with mine too.
Thanks too, to all who pitched in, I didn't mean to take over the whole game *eek*
Cheers