also...hard braking in a race moves the crank forward
Racer bud
Spitfire #21
----- Original Message -----
From: "Greg Lunker Hilyer" <Lunkercars@earthlink.net>
To: "Randall" <tr3driver@ca.rr.com>
Cc: "Friends of Triumph" <fot@autox.team.net>
Sent: Sunday, March 09, 2008 4:37 PM
Subject: Re: [Fot] Thrust washers
> Seems to me that clutch loading pushes the crank forward and therefor
> the front washer[s] take the force. If the main cap were misaligned
> rearward, the block journal half of the thrust washer would take all
> the load. If the misalignment was slight, with clutch in, the rear
> washer would still have clearance - not load... Or what am I missing?
>
> Just went and re-inspected and mic'd it. Wear is actually minimal - .
> 001"-.002" depending where I measure as compared with the other 3
> halves. The failure area is not consistent around the radius but
> rather "pock marks" in 3 distinct areas there the next layer of
> material is exposed. Going back to my theory above, if the crank had .
> 004" thrust clearance and the main cap was .002" out of alignment,
> the rear would not come into contact until that .002" was worn off.
> I'm now starting to put 2+2+2 together and including my pressure
> plate failure [explosion?] into the equation. That incident [race
> before last] is why, in addition to general freshening, I've got the
> crank out to be crack checked. Now seems likely that the violence
> from the clutch cover coming apart [it destroyed the bellhousing]
> perhaps combined with the misalignment of a less than robust part
> added up to what I found.
> Thoughts? Comments? Please?
> Greg "Lunker" Hilyer
> TR4 #314
> Albuquerque NM
> On Mar 9, 2008, at 5:17 PM, Randall wrote:
>
>>> Makes perfect sense.
>>
>> Not to me ... can someone explain what I'm obviously not seeing :
>> how the
>> load on the front washer can be more than the load on the rear
>> washer ? Cap
>> misaligned means not enough clearance, that's obvious. But the
>> lower rear
>> washer would be just as tight as the upper front washer, plus it
>> would carry
>> the load from the clutch.
>>
>> Randall
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