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Date:         Sat, 19 May 2012 11:27:50 -0400
Reply-To:     Jason <uberhare@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jason <uberhare@GMAIL.COM>
Subject:      Re: New Drums
In-Reply-To:  <CACK29c=+C4NKkk0=inw_5-Li3F0J6LK1JHaj9OGWVT5LvuqcJg@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

The quality of aftermarket Brembo product has diminished. Their rotors have gotten pretty cheap as well. Try another brand if possible?

Jason

On Sat, May 19, 2012 at 10:47 AM, Steven Shelton <shelton4@gmail.com> wrote:

> Interesting that you mention 0.010 mm, Scott. I mounted each drum on the > scroll chuck of my woodworking lathe and measured the runout. > Unfortunately, I don't have a dial gauge so I held the depth probe on my > calipers next to the inside of the drum. It wouldn't measure any runout on > one of the drums (even though it didn't scrape all the way around) but the > other drum was 0.010 mm off. This same drum doesn't have and > balance weights, either. Hmmmmm. Of course, like the drums, my calipers > are made in China, so who knows how accurate that measurement is. > > Thanks for all your suggestions. It's back to the FLAPS for another drum. > I'll see how the new one measures out before I install it. > > > On Sat, May 19, 2012 at 1:06 AM, Scott Daniel - Turbovans < > scottdaniel@turbovans.com> wrote: > > > I'm sure it's possible that someone could get a new drum on and not get > > it sitting really right on the flange .. > > or fail to clean scmutz off the flange face .. > > but 'normally' ..you make sure the two holes in the drum line up with > > their respective bolt holes in the flange, and get the drum on there > > correctly. > > And then ..you turn the drum to see if it turns smoothly .. > > *surely* anyone installing a drum onto a flange, or anything that turns > > ..would check that it turns smoothly ...and doesn't wobble. > > > > and then if it was wonky anyway ... > > when the wheel was bolted on , that t would be wonky too. > > and surely ...anyone doing this work would check that the wheel turns > > smoothly and straight. > > ( I've seen someone remove a whole vanagon dash .. > > and never once check the function of any of the heater control cables > > ..which I can't imagine ( they were REAL screwed up too ) so I guess > > people do do work and don't check things ..but man. > > > > really ...check *everything* ....everything. > > if not checking each step of the way ...a body can't do consistently > > good work. > > > > and yes. there can be out-of- round new drums. > > I use a spare rear wheel housing and stub axle with flange on it ... > > to jig up a drum in a vice .. > > then I turn it by hand, with a dial gauge reading out of roundness , > > or roundness as the case may be. > > > > also ...a small test that may reveal something.. > > while driving, say at 30 mph ...pull on the parking brake pretty hard > > and see if you feel pulsation there.. > > if you do ..it is for sure associated with one or both rear drums. > > > > you can also do that test on the car by putting the drums on the rear > > wheel flange backwards ... or inside out . > > then drive it in first gear in the air.. > > rig a pointer ..say a screw driver clamped to a jack stand .. > > it should be pretty close to round .. a few thou off is probably normal > .. > > but .010" out would be pretty bad I'd say. > > > > for reference , a spark plug gap is .028" . to give an idea what .010 > > is if you don't have a dial gauge. > > > > Do good careful work. It's all in the details. > > > > scott > > turbovans > > > > > > On 5/18/2012 9:14 PM, Ben T wrote: > > > >> Hi Steven, > >> > >> As Dennis Haynes just pointed out, the centerbore at flat surface of the > >> drum can get caught on the edge of the hub. Once torqued down, the drum > is > >> frequently irreparable. I didn't believe it could happen to a new drum > >> until it did at a local shop working in a Westy for a friend of mine. > >> > >> > >> BenT Drum > >> sent from my electronic leash > >> > >> On May 18, 2012, at 11:20 AM, Steven Shelton<shelton4@GMAIL.COM> > wrote: > >> > >> I just installed new Brembo drums and SBS shoes in my 1985 Camper. Now > >>> the > >>> brake pedal pulsates when I apply the brakes. The only thing I can > think > >>> of that would cause this is out of round drums. Can anyone think > >>> of anything else that would cause this? > >>> > >> >


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