When I look at the gears of some cams I get the impress that occasionally
the wrong angle for the teeth has been cut on. I don't know why this is.
Chris
-----Urspr|ngliche Nachricht-----
Von: William Dewar [mailto:pcdelux@verizon.net]
Gesendet: Sonntag, 27. Mdrz 2011 19:52
An: MadMarx
Betreff: Re: [Fot] Distributor gear failure
Chris,
In the past I have seen this gear damaged two ways. First if the end float
of gear set too tight. Second is a
failure shortly after replacement cam installed. Not sure
why replaced cams caused the failure. Assumed gear on
cam was made wrong.
Bill DeWar
----- Original Message -----
From: "MadMarx" <tr4racing@googlemail.com>
To: "'Friends of Triumph'" <fot@autox.team.net>
Sent: Sunday, March 27, 2011 10:58 AM
Subject: Re: [Fot] Distributor gear failure
> I ment with block face this brass face.
> I didn't know that it is buyable bearing.
> I never seen any of the with wear.
>
> I never had any trouble with this gear but if failed last year and ruined
a
> good cam.
>
> Any ideas why this gear do fail from time to time?
>
> My idea was that it only fails on chilled cast cams and not on nitrate
> hardened but a friend of mine had one failed that was nitrate hardened.
>
> Could it be something that has to do with harmonic resonances of the cam?
>
> Cheers
> Chris
>
>
> -----Urspr|ngliche Nachricht-----
> Von: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] Im
> Auftrag von Randall
> Gesendet: Sonntag, 27. Mdrz 2011 14:12
> An: 'Friends of Triumph'
> Betreff: Re: [Fot] Distributor gear failure
>
> > If the distributor gear is running on the block face, is that
> > the right position?
>
> The gear shouldn't run on the block face (again assuming we are talking
> 4-cylinder wet liner), but instead runs on top of a brass bushing
(Stanpart
> 56405) that also carries the drive shaft to the oil pump.
>
> So IMO if you want to move the gear upwards, the first step would be to
> replace that bushing with a new one. I believe that should give you the
> proper position of the gear relative to the camshaft. But if it needs to
> come higher than that, I would suggest fitting shims between the flange of
> the bushing and the cylinder block, so the gear continues to ride on the
> bushing face.
>
> > If this is uncertain then how to measure the right mesh position?
> > Do I have to color the gears to see the contact point like if
> > I would adjust the rear axle?
>
> Makes sense to me, but I've never tried it.
>
> Randall
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe:
> http://autox.team.net/mailman/options/fot/tr4racing@googlemail.com
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe: http://autox.team.net/mailman/options/fot/pcdelux@verizon.net
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
|