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
Vincent twin clutch
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="BigEd" data-source="post: 67085" data-attributes="member: 161"><p>Ready to leave so found a few minutes to do some searching and found the information below. I can't remember who wrote it so unfortunately I am not able to credit it to the author. I think it might be one of our very knowlegable London members, possibly Paul Packman. (Perhaps someone will be able to tell me who wrote it so I can give them credit.)</p><p></p><p></p><p><strong>Clutch Plunger Spring Pressure Adjustment.</strong></p><p></p><p>I was interested to read the letter in the October issue of <em>MPH </em>from Roy Cross regarding the Vincent clutch. I have lived with a Vincent clutch for the past 38 years and suffered various malfunctions which I have overcome (I think!). </p><p>I have climbed the long learning curve associated with this complicated piece of equipment and persevered with it and managed to get it working properly, when it becomes a delight to use. </p><p>Roy mentions the two centralising plungers and the importance of their correct adjustment.</p><p></p><p><strong>Both plungers are pushed by their springs against a stop within their housings. I’ve found that it is important that these are adjusted so that the shoes are concentric with the drum.</strong></p><p></p><p><strong>There should be a clearance ofabout O.025” between all the liners and the inside of the drum. The plungers can be adjusted by putting drill bit down the plunger hole and removing metal from the stop (carefully by hand) or fitting a plunger of the correct length.</strong> </p><p>The centralising spring pressures are import and this is where Roy’s set up rig would come into play. </p><p>I have managed to adjust these over the years by trial and error. Referring to the little picture on page 29 of MPH 765 (magnifying glass at the ready) the centralising plunger on the right hand <strong>shoe (C7/1)</strong> helps to centralise that shoe but only comes into play when the engine is being kicked over or when throttling back on the overrun. That being so, the spring of this plunger can be reasonably slack and pushed in easily <strong>withtwo or three pounds</strong> of thumb pressure. </p><p>The plunger on the left next to the <strong>C7 is the critical one</strong> as it holds off the shoes being engaged by the pilot cutch when it turns the plate carrier and ‘straightens’ the two little dumbbells to become more radial to engage the two clutch plates with the drum. </p><p>I made a hole in the lining in my left clutch shoe so I could adjust the spring pressure and found that <strong>if the spring is too tight it holds off the engagement from the pilot clutch resulting in clutch slip</strong> and if the spring is <strong>too slack the clutch snatches</strong>. When an in between adjustment is found the clutch can beengaged smoothly with no slip and operated with one finger – bliss. </p><p>I am glad a more scientific approach is becoming available to preset these springs of the Vincent Clutch instead of having to strip this complex component to adjust spring pressures so many times as I have had to do.</p><p></p><p></p><p><strong>Note</strong>.</p><p></p><p><em>Removed the smaller of the two springs in the C7/1 shoe plunger to lower pressure required to depress the plunger. This gives approximately 3 lbs pressure need to fully depress it.</em></p><p></p><p><em>C7 plunger is much harder to depress, maybe 20+ pounds to fully depress.</em></p><p></p><p><em>Both plungers set on jig. Eddy – 14-04-13</em></p></blockquote><p></p>
[QUOTE="BigEd, post: 67085, member: 161"] Ready to leave so found a few minutes to do some searching and found the information below. I can't remember who wrote it so unfortunately I am not able to credit it to the author. I think it might be one of our very knowlegable London members, possibly Paul Packman. (Perhaps someone will be able to tell me who wrote it so I can give them credit.) [B]Clutch Plunger Spring Pressure Adjustment.[/B] I was interested to read the letter in the October issue of [I]MPH [/I]from Roy Cross regarding the Vincent clutch. I have lived with a Vincent clutch for the past 38 years and suffered various malfunctions which I have overcome (I think!). I have climbed the long learning curve associated with this complicated piece of equipment and persevered with it and managed to get it working properly, when it becomes a delight to use. Roy mentions the two centralising plungers and the importance of their correct adjustment. [B]Both plungers are pushed by their springs against a stop within their housings. I’ve found that it is important that these are adjusted so that the shoes are concentric with the drum.[/B] [B]There should be a clearance ofabout O.025” between all the liners and the inside of the drum. The plungers can be adjusted by putting drill bit down the plunger hole and removing metal from the stop (carefully by hand) or fitting a plunger of the correct length.[/B] The centralising spring pressures are import and this is where Roy’s set up rig would come into play. I have managed to adjust these over the years by trial and error. Referring to the little picture on page 29 of MPH 765 (magnifying glass at the ready) the centralising plunger on the right hand [B]shoe (C7/1)[/B] helps to centralise that shoe but only comes into play when the engine is being kicked over or when throttling back on the overrun. That being so, the spring of this plunger can be reasonably slack and pushed in easily [B]withtwo or three pounds[/B] of thumb pressure. The plunger on the left next to the [B]C7 is the critical one[/B] as it holds off the shoes being engaged by the pilot cutch when it turns the plate carrier and ‘straightens’ the two little dumbbells to become more radial to engage the two clutch plates with the drum. I made a hole in the lining in my left clutch shoe so I could adjust the spring pressure and found that [B]if the spring is too tight it holds off the engagement from the pilot clutch resulting in clutch slip[/B] and if the spring is [B]too slack the clutch snatches[/B]. When an in between adjustment is found the clutch can beengaged smoothly with no slip and operated with one finger – bliss. I am glad a more scientific approach is becoming available to preset these springs of the Vincent Clutch instead of having to strip this complex component to adjust spring pressures so many times as I have had to do. [B]Note[/B]. [I]Removed the smaller of the two springs in the C7/1 shoe plunger to lower pressure required to depress the plunger. This gives approximately 3 lbs pressure need to fully depress it.[/I] [I]C7 plunger is much harder to depress, maybe 20+ pounds to fully depress.[/I] [I]Both plungers set on jig. Eddy – 14-04-13[/I] [/QUOTE]
Insert quotes…
Verification
What was Mr Irving's Christian Name?
Post reply
Home
Forums
Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Vincent twin clutch
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