Author Topic: 1951 BSA A7  (Read 4246 times)

Offline muskrat

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Re: 1951 BSA A7
« Reply #45 on: 25.04. 2014 09:44 »
G'day Anji.
Have a look here  http://www.a7a10.net/forum/index.php?topic=368.msg1717#msg1717
The bearings with the plastic cage are easy to pop the rollers out, then use a bearing puller on the outer ridge.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online RichardL

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Re: 1951 BSA A7
« Reply #46 on: 25.04. 2014 10:57 »
First of all, I'm honored that my contraption bearing puller is seen as useful, particularly by the likes of Muskrat.  There are two things that, I think, might need mentioning:
  • The back side of the split circle is chamfered to avoid damage to shims. http://www.a7a10.net/forum/index.php?topic=368.msg1734#msg1734
  • I mentioned that the bearing somewhat walks off the shaft in small steps. It seems to me that this should be harmless to the race, however, my current rebuild is due to the inner race turning and taking out my shims. Therefore, I cannot rule out to a certainty that that problem was not the result of distorting the inner race in the "walking" process.

Just now is the first time I considered the "walking" issue, so, I have cleared my conscience by describing the possibility of distorting the inner race. A puller along the same lines, but with more even pulling force would be possible, also, some heat might help.

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020 (if it's not cancelled and we are free to move about by then). Watch website at https://www.gentlemansride.com for details.

Offline muskrat

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Re: 1951 BSA A7
« Reply #47 on: 25.04. 2014 14:34 »
Flattery will get you everywhere Richard.
The only thing to add to your puller, is a central bolt to work on the end of the shaft like a normal puller.
Once it's set up and tension is applied, boiling water over the bearing should get it moving.

With a bit of care, determination and a bit of gentle force the rollers in a steel cage can be removed. On reassembly the tangs of the cage need to be peened back in a tad to hold the rollers.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline anjimehra

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Re: 1951 BSA A7
« Reply #48 on: 26.04. 2014 13:02 »
Thanks guys for your help. Will try & get a puller made.

Another query for Muskrat. What rotates the oil slinger behind the roller brg ? Is it the pressure of the fixed cush drive ( 88 ) pressing it against the inner race. Just sorting out my head before putting it all back together.
Anji

Offline anjimehra

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Re: 1951 BSA A7
« Reply #49 on: 29.04. 2014 12:56 »
Thanks guys for your help. Will try & get a puller made.

Another query for Muskrat. What rotates the oil slinger behind the roller brg ? Is it the pressure of the fixed cush drive ( 88 ) pressing it against the inner race. Just sorting out my head before putting it all back together.
Anji
Muskrat, are you there ? Need your expert advice
Anji

Offline muskrat

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Re: 1951 BSA A7
« Reply #50 on: 29.04. 2014 14:36 »
G'day Anji, sorry mate I forgot to get back to you.
Yes you are right.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7