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Oil release valve spring #784174 09/13/19 4:37 pm
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BritTwit Offline OP
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Curious about a part number in Cat # 00-5077 page 17

Timing cover
Ref# 46 (66-1684) Oil valve spring
below it shows (no ref #) (67-1496) Oil release valve spring
The same as A10/A7. The 67-1496 is noticeably shorter and heavier.

What's up. catalog error?


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Re: Oil release valve spring [Re: BritTwit] #784183 09/13/19 6:16 pm
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Magnetoman Online Content
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What do you mean by "below it"? My catalog 00-5076 (nb., not a typo; one digit lower than in your post) shows 66-1684 for the timing cover spring, as does catalog MC714-3 (Aug. '55). I can't find the second number you listed, i.e. 67-1496, in either catalog. The list of part numbers in numerical order at the back of 'The Gold Star Buyer's Companion' that was created from a scan of the catalog does not show that second part no.

Re: Oil release valve spring [Re: Magnetoman] #784188 09/13/19 7:08 pm
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It looks like we have another mystery.
With one of my employees looking over my shoulder (making sure I'm not going senile), I'm looking at BSA Spares, Gold Star (500cc.) (Red cover) Catalog No. 00-5077
Printed in England Sept. 1958
Page 17 (engine section) #46 66-1684
-- 67-1496

[img]http://[/img]

Attached Files scan0087.jpgscan0088.jpg

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Re: Oil release valve spring [Re: BritTwit] #784194 09/13/19 7:41 pm
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Magnetoman Online Content
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Originally Posted by BritTwit
It looks like we have another mystery.
Indeed we do.

[Linked Image]

[Linked Image]



Re: Oil release valve spring [Re: Magnetoman] #784195 09/13/19 7:44 pm
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BritTwit Offline OP
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I think someone screwed up in the catalog department.

67-1496 does exist. It's listed as a spring in the A group catalog.


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Re: Oil release valve spring [Re: Magnetoman] #784197 09/13/19 8:18 pm
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BritTwit Offline OP
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And another thing.

The ball. 90-0241 is constantly listed as a 5/16" Dia.

Various catalogs and price sheets show 01-4676 as 3/16" and 1/4".
A later price sheet shows a new number as well (01-4675) 3/16"

go figure

I guess I need to measure my balls.


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Re: Oil release valve spring [Re: BritTwit] #784198 09/13/19 8:26 pm
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Magnetoman Online Content
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Now that I know it exists I'll have to start searching for a catalog # 00-5077. Sigh... However, first I'll search what I already have since there's a 50/50 chance I already have one but I never noticed because the covers are identical.

Re: Oil release valve spring [Re: BritTwit] #784233 09/14/19 7:12 am
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Kerry W Online Content
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My version of the same parts book above (red cover, # 00-5076, printed Sept 58) has the same #46 - 66-1684 and "-- - 67-1496" detail.

Looking at the 1954 '350 cc and 500cc Single Cylinder;inder O.H.V. Models' book (green cover) the ball doesn't have a part number - it's merely listed at '1/4" diameter...Oil valve spring ball' the 'Oil valve spring' is listed as part # 66-1684.

The big-fin parts lost in the ubiquitous BMS book reflects the red parts books above (with assumed errors). The late ZB/BB lists further into the book reflect the same details as my green B31/B33 book.

Kerry


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