The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: bikemadinspain on 08.04. 2017 14:39
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Hi, I am rebuilding a 53 Goldenflash with a small journal engine.
Does anybody know if the outer primary chain covers come in different sizes. The one I have was not fitted to the engine and came in a box with the other parts of the engine, however, I am now reassembling the engine I cannot get the cover to fit over the clutch casing without pressing against it.
The clutch does not snag inside the cover and works fine.
The casing has a ser no of 67-170 p1 on it.
Many thanks
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G'day maaate- haven't heard from you in a while, but I don't live here so no surprise *smile*
As far as I know, ther's only one type of cover for the Plunger models, and the part # in the book is 67-1701, and the part# as I'm led to believe is 1# off the casting #, so at least it sounds close .. *conf*
The trouble you have could be due to the hollow 'dowell pegs' in front and rear screw holes being out of shape and not going in the corresponding inner-case holes ?? (assuming they are there)...if not that, and the clutch is installed, then the clutch may be sitting further out that it should be..I know it's a bitch to have to pull apart and check, but but did you do progressive dry run assembly of the cover and all other bits before adding in the clutch??
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G'day maaate- haven't heard from you in a while, but I don't live here so no surprise *smile*
For sure, I probably live here too much, much to the affect of making people crazy but, c'mon Dutch, if you're not living here it is, at least, a well-used vacation home.
Richard L.
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Hi gents,
yes disappeared off the radar for a few years due to, well life going round really, homes cars bikes etc etc.
Have stripped all the clutch back off yesterday then got distracted, I will look further this morning and let you know what I find.
Just glad the casings are the same I can now tie it down to either a blonde moment by me or a part fault. *eek*
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but, c'mon Dutch, if you're not living here it is, at least, a well-used vacation home.
aaah yeah, I do have the occasional relapsation *smile*
b.m.i.s- maybe goes without saying to also dummy place the clutch without tightning mainshaft nut or adding springs- but you'll have to do the Cush nut up fully (without spring to start ) These two bits are all that I can see would impede the cover (other than the dowells)
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Nice bikes,,
Can a short video be attached as an attachment?
Just tried but takes ages so cant figure out if its my computer or its to big
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Nice bikes,,
Can a short video be attached as an attachment?
Just tried but takes ages so cant figure out if its my computer or its to big
No. It'll be to big as you mentioned.
If you have an outlook-hotmail account you can upload it to your "public" files and post the link on the forum. I think G-Mail offers something similar to.
If not, there's Photobucket or the likes
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YouTube?
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Hi Morris, I remember that sign of yours!!!
Hi Greybeard, yes I am working on it at the mo, nice to see u r a supporter of the gentlemen's ride, I am hoping to do it this year in Alicante Spain
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Tried and tried and cannot get it to load on U tube etc,
So have resorted to a few more pics.
Forget it, I cannot load them either, apparently I have made them to big...., not got a great deal of patience with computers....
I am off to walk the dog calm down and try something else.
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some pics, fingers crossed
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is the outer casing the correct shape?
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at last
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finally, please shout up if u see what's wrong I am not easily offended.
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I mean of course the clutch cover case not the outer casing
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Clutch cover looks a bit distorted, like maybe the spring adjuster nuts have been loose at some stage and deformed it- just guessin' ...how does it look on the inside ??
Try leaving it off (clutch cover), and see if that makes a difference. I run mine without it and no probs
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Hi,
I mean of course the clutch cover case not the outer casing
That makes a little more sense *ex*
That the dome cover will not fit over the assembled clutch *????*
BSA used this type cover on a few different models M20's and some pre war models
From memory the plunger cover looks deeper??
John
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Hi Dutch and John,
Never figured for one second that the cover could be left off.
Yes it is all scored on the inside when three of the clutch studs when I initially stripped it down had been stripped clean of the screwdriver thread top.
I have of course replaced the whole lot with new parts.
I will put it back together tomorrow afternoon and see how I get on.
With hindsight and looking back on the rebuild I wished I had sourced another engine, but I have enjoyed the rebuild and I have learned more than I had ever learned just tinkering with bikes. *smile*
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OK that's interesting, maybe as John says it may be the wrong cover.
How many clutch plates are in there? - maybe it's too fat, the parts book says five friction plates but I only use four because the nuts didn't screw on enough and kept undoing, and that could also contribute to your issue *dunno*
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G'day maaate- haven't heard from you in a while, but I don't live here so no surprise *smile*
For sure, I probably live here too much, much to the affect of making people crazy but, c'mon Dutch, if you're not living here it is, at least, a well-used vacation home.
Richard L.
I'm not sure that any of us actually exists when we are not here.
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5 came out and I had the 5 back in with the clutch working ok just had the issue with the case.
If we don't exist how come I keep getting nagged by my Mrs!!
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It's your wifes superpower ! *conf2*
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Cheers Gents,
all sorted, left the cover off, clutch and all the working parts turning over nicely.
*smile*
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Good to hear, but be worth keeping an eye on the adjustment with those five friction plates, as I may have said I had issues with the adjuster nuts backing off (It'll drag and slip, and you'll hear them gouging the actual outer casing, as the topic suggests)...after I dumped one out, it's generally behaving, and each time I have it open, I rotate the spare plate in/one out (just so I have five evenly worn and not four worn and one new one )
Maybe you should also consider changing the topic to something more specific like " plunger Clutch cover" ?
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Very good point Dutch, I will keep in mind.
Also good point about the title, just tried to change but could not figure out how to edit it, any idea?
Regards
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Another thing to keep in mind is that by leaving the cover off doesn't fix it, just removes the symptom but not the cause *eek*..
Also good point about the title, just tried to change but could not figure out how to edit it, any idea?
Dunno- only thing I can think of is the 'modify' option top right corner (of your posts) , otherwise *dunno*