The Spares Company
Club Shop/Regalia
Parent Website
Contact Officials
Machine Registrar
Club Secretary
Membership Secretaries
MPH Editor and Forum Administrator.
Section Newsletters
Technical Databases
Photos
Home
What's new
Latest activity
Forums
New posts
What's new
New posts
Latest activity
Information
Bike Modifications
Machine Data Services
Manufacturers Manuals
Spare Parts Listings
Technical Diagrams
Whitakerpedia (Vincent Wiki)
The Club
MPH Material Archive
Flogger's Corner
Obituaries
VOC Sections
Local Sections
Local Section Newsletters
Miscellaneous
Club Assets
Club History
Club Rules
Machine Data Services
Meeting Documents
Miscellaneous
Essential Reading
Magazine/Newspaper Articles/Letters
Adverts and Sales Brochures
The Mighty Garage Videos
Bikes For Sale (Spares Company)
Log in
Register
What's new
New posts
Menu
Log in
Register
Install the app
Install
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crank Case Inspection
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Pushrod Twin" data-source="post: 57581" data-attributes="member: 340"><p>Thanks Guys.</p><p>Chris, you will only think your cases are scrap if you measure them! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /> If your engine is together & running, take the "it aint broken, no need to fix" attitude & ride on.</p><p>Yes, all of those holes are tapped to hold the rear plate to the back of the cases. The kick starter hole has alloy plugs loctited in place & tapped 1/4"x 20 TPI Whit, & have a spacer plate bonded above them for support, the rest are 3/16 x 24 TPI. Because these are die cast cases the wall material is thinner than my B cases & the top row are at an angle parallel to the rear cylinder deck. When the cases were machined flat some of the gearbox trapdoor bore remained, I had it welded, you can see it from the inside at the kick start hole. There was also some chain case support missing at the bottom from the chain adjuster rearward, that has been welded back in and the piece at the top where the g/box oil dip stick penetrated was repaired too. I will attach a photo of the back plate soon.</p><p></p><p>Chris, yes, I have seen Enfields with boxes mounted similar, but not with an outrigger bearing on the sleeve gear as I have with this one.</p><p></p><p>David, how do you measure your spindle heights from the mating face? My first thought is to place the case back on the mill table & set a DTI with a fine nib onto the face, zero it, then transfer it to each spindle in turn, winding the knee until the DTI zeros & read the readout?</p><p></p><p>My thoughts for the first inspection detail are as already suggested;</p><p>Visual, much of which I have done during the machining phase.</p><p>Damage to mating faces, nicks & burrs.</p><p>Bolt/stud hole faces for cracks & burrs. Both to be dressed as required.</p><p>Stud hole threads for damage, helicoil or solid insert repair as applicable.</p><p>Mating face flatness, gauged on surface plate.</p><p>Measurements & tolerances required;</p><p>1,Mains bearing bores,</p><p>2,Cylinder bores,</p><p>3,Oil pump bore</p><p></p><p>More tomorrow.</p></blockquote><p></p>
[QUOTE="Pushrod Twin, post: 57581, member: 340"] Thanks Guys. Chris, you will only think your cases are scrap if you measure them! :( If your engine is together & running, take the "it aint broken, no need to fix" attitude & ride on. Yes, all of those holes are tapped to hold the rear plate to the back of the cases. The kick starter hole has alloy plugs loctited in place & tapped 1/4"x 20 TPI Whit, & have a spacer plate bonded above them for support, the rest are 3/16 x 24 TPI. Because these are die cast cases the wall material is thinner than my B cases & the top row are at an angle parallel to the rear cylinder deck. When the cases were machined flat some of the gearbox trapdoor bore remained, I had it welded, you can see it from the inside at the kick start hole. There was also some chain case support missing at the bottom from the chain adjuster rearward, that has been welded back in and the piece at the top where the g/box oil dip stick penetrated was repaired too. I will attach a photo of the back plate soon. Chris, yes, I have seen Enfields with boxes mounted similar, but not with an outrigger bearing on the sleeve gear as I have with this one. David, how do you measure your spindle heights from the mating face? My first thought is to place the case back on the mill table & set a DTI with a fine nib onto the face, zero it, then transfer it to each spindle in turn, winding the knee until the DTI zeros & read the readout? My thoughts for the first inspection detail are as already suggested; Visual, much of which I have done during the machining phase. Damage to mating faces, nicks & burrs. Bolt/stud hole faces for cracks & burrs. Both to be dressed as required. Stud hole threads for damage, helicoil or solid insert repair as applicable. Mating face flatness, gauged on surface plate. Measurements & tolerances required; 1,Mains bearing bores, 2,Cylinder bores, 3,Oil pump bore More tomorrow. [/QUOTE]
Insert quotes…
Verification
What was Mr Vincent's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crank Case Inspection
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top