Good advise; but it's hard to figure out what Tom is saying. They could be indeed oversized or does he just need to adjust properly to get his pedal back? That is, without driving the car, is there any pedal? His e-mail states that he puts the pedal to the floor. Could be adjustment or needing to be bled.
In any case, Gary's comments are valid, I miss being able to turn my own drum and rotors since I retired. Only use a machine shop with crank lathes, head planers, and suchlike equiptment as the guy running them knows what he's doing.
Ray Jones in AR
> From: Gary W Nelson <Gary@xxxx>
> Date: Mon, 14 Jul 2003 22:47:52 -0700
> To: "thomas powers" <classiccars64@xxxx>,chrysler300@xxxxxxxxxxxxxxx
> Subject: Re: [Chrysler300] front drum for 60 chrys.300F
>
> Warning. Do not take your classic drums to a parts house to have them
> turned. Napa is a parts house and not brake specialists. I would not drive
> by a parts house w/ my drums let alone have them turn them. No offense Tom
> P. you did not know the guy behind the drum lath likely had 10 min.
> training, ( No offense to good mechanics). I would only consider a break
> specialist, maybe a commercial house. The first thing you want to ask if
> they will measure them w/ you present and how much they estimate they will
> need to turn to clean up. The rule of thumb is .060" over max. That's what
> happened to Tom P. Drum to thin and heat up quickly and bingo you have
> brake fade. I would also ask to wait for the drums to see how much is
> required to clean up. If you are close to the .060" over then I would not
> hesitate to leave a little signs of scoring. Example if you had riveted
> linings and had a score all the way around I would not be concerned to turn
> it all out just to see a perfect surface. That's my opinion, talk to your
> mechanic. Another problem to be concerned with is when a drum is turned out
> of concentricity or wobble. In both cases your pedal will pump as you apply
> brakes. Ask the shop how close they guarantee they can hold those
> tolerances, (they may chase you out of the shop?). My manual for my C calls
> out .005" That's two hairs, (from your head).
> I am fortunate to turn my own drums. I press out the bearing races so my
> fixture is secured to the race seats the truest surface Chrysler could
> provide. I then indicate in for concentricity and wobble. After turning
> front or back sets to within .005" of each other I then mount on spindle or
> axle and indicate again,(backing plates off). All of mine are within the
> factory spec of .005".
>
> Good luck turning.
>
> Gary
>
> At 01:49 AM 07/15/2003 +0000, thomas powers wrote:
>
>> Hello.
>> Would anyone have a good used brake drum front drivers side that is not
>> turned to much for a 60 300F.Napa turned mine and took to much off of the
>> drum and now the car doesnt stop good you put the brake to the floor and it
>> keeps going thank you tom.
>>
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