View or Hide Header -->
Welcome,
Guest
. Please
login
or
register
.
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length
This topic
This board
A7 & A10 Engine
A7 1946-1950
Gearbox, Clutch, Primary
Frame
Lucas, Ignition, Charging, Electrical
Amal, Carburation
Entire forum
Google
Home
Help
Search
Contact
Login
Register
The BSA A7-A10 Forum
»
Technical (Descriptive Topic Titles - Stay on Topic)
»
Lucas, Ignition, Charging, Electrical
»
insulating washers
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: insulating washers (Read 552 times)
Tumbleweed
A's Good Friend
Join Date: Feb 2012
Posts: 226
Karma: 0
insulating washers
«
on:
03.10. 2017 11:59 »
hi everyone , can any one tell me how the washers fit , my new set didn't have any washers , steel points later mag I think 1959 a10 , thanks
Logged
Semper in excretia sumus solum profundum veriat.
groily
Wise & Enlightened
Join Date: Jul 2007
Posts: 1841
Karma: 31
Re: insulating washers
«
Reply #1 on:
03.10. 2017 13:20 »
Have a look here, at the Lucas supplement for the later steel cb assembly where there's a good exploded view:
http://www.brightsparkmagnetos.com/library/LWImags/Motor%20cycle%20rotating%20armature%20magnetos,%20Sec%20L-5,%20Pt%20A,%20supp.pdf
Should be reasonably clear I think.
Key things are not to let the spring blade on the opening point kiss the camring at any point, as it is 'live'; to ensure there's an insulated washer on the pivot post under the opening point so the metal bits of it can't touch the backplate; that the 'figure of eight' insulator is correctly sitting on the backplate between it and the fixed point's bit of bent plate; and that the screw that retains the fixed point mount to the backplate has an insulator under its head (unless you're fitting an easycap capacitor, when you don't want that one).
Logged
Bill
Tumbleweed
A's Good Friend
Join Date: Feb 2012
Posts: 226
Karma: 0
Re: insulating washers
«
Reply #2 on:
03.10. 2017 13:39 »
Thanks Groily , so fig 4, 8 , and 12 are insulating washers ?
Logged
Semper in excretia sumus solum profundum veriat.
JulianS
1962 A10
Wise & Enlightened
Join Date: Mar 2017
Posts: 1382
Karma: 29
Re: insulating washers
«
Reply #3 on:
03.10. 2017 16:50 »
12 are hard fibre of different thicknesses used to align the contacts.
Photo shows what lucas supplied as a set of points, showing washers 4 and 12. Shame pattern points do not come with all the parts needed!
Logged
groily
Wise & Enlightened
Join Date: Jul 2007
Posts: 1841
Karma: 31
Re: insulating washers
«
Reply #4 on:
03.10. 2017 17:59 »
Yes to fibre for alignment purposes and Yes to Shame about. Fften original bits are undamaged - but note point made in the pdf about the retainers.
Those retaining clip wotsits can be had from various suppliers (though the overall diameter of some versions can get in the way of a spanner on the centre screw in some cases).
Why isn't anything ever as easy as it orter be . . .??
Logged
Bill
Tumbleweed
A's Good Friend
Join Date: Feb 2012
Posts: 226
Karma: 0
Re: insulating washers
«
Reply #5 on:
03.10. 2017 18:12 »
these are hard to find washers and critical I suppose , the plumbers dept in the store will have them . thanks for your help . t w
Logged
Semper in excretia sumus solum profundum veriat.
Print
Pages: [
1
]
Go Up
« previous
next »
The BSA A7-A10 Forum
»
Technical (Descriptive Topic Titles - Stay on Topic)
»
Lucas, Ignition, Charging, Electrical
»
insulating washers