[Fot] TR 3 / 4 Distributor gear failure

[MadMarx]

Hi Joe,



it is a stock gear as far I know no aftermarket gear was made til now but
there will be in short future.



The mating gear was hardened too.



The whole story:

I got Larrys cam and let it nitrate harden. Then after each race I checked
the gears and found wear from the first race on.

After the 3H race at the ring I replaced the gear with the hardened one.



Cheers

Chris



Von: n197tr4 at cs.com [mailto:n197tr4 at cs.com]
Gesendet: Mittwoch, 9. November 2011 14:17
An: tr4racing at googlemail.com; fot at autox.team.net
Betreff: Re: [Fot] TR 3 / 4 Distributor gear failure



Chris,

Is this OEM gear or aftermarket?....if there is an aftermarket offering.

What about hardening the mating gear?

Great to see the FOT LIST alive with valuable information.





-----Original Message-----
From: MadMarx <tr4racing at googlemail.com>
To: fot <fot at autox.team.net>
Sent: Wed, Nov 9, 2011 5:50 am
Subject: Re: [Fot] TR 3 / 4 Distributor gear failure

Update:

After the hardening I can report some success!!
The teeth show NO wear anymore.
The contacting surface is glossy polished but no marks of teeth digging
into.

>From my point of view it should be advisable to plasma nitrate harden the
gear wheel to a depth of 0,2 mm.

Cheers
Chris

-----Urspr|ngliche Nachricht-----
Von: MadMarx [mailto:tr4racing at googlemail.com
<mailto:tr4racing at googlemail.com?> ]
Gesendet: Mittwoch, 5. Oktober 2011 16:10
An: 'fot at autox.team.net'
Betreff: AW: [Fot] TR 3 / 4 Distributor gear failure

I would like to give an update:

I did a hardness check on the distributor gear:

HRC 38 to 43 (stock)
After plasma nitrating
48 - 54 HRC

So the surface is now harder and I'll report how the gear will behave.

Cheers
Chris
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