Some time ago I ordered rear brake rotors, two sets in fact, for my 91 and 92 300D. Ordered Balo as I've always had success with them before. Got a call from my indie and he said they wouldn't fit. On my wheel hub there is a locating pin in addition to a set screw. There is no hole for the locating pin on the rotor. See pics below.

Did a little research. Found out (someone can correct if I'm wrong about any of this): (a) the locating pin was of use in the manufacturing process to align things; (b) it serves no mechanical purpose once everything is put together; (c) MB at some point decided it was unnecessary; and (d) it can safely be removed to accommodate a wider variety of rotors....that's what I've done.

The parts supplier in Arizona makes these issues very clear....for my cars, I'd have to get a Bosch rotor if I didn't want to eliminate the pin. The Pelican site is deficient in this respect; it makes no mention of the issue and every pic they show of the rotors that they sell for my cars shows only six holes.

So, just one more thing to be aware of.

Attached Thumbnails

   

__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

those locating pins are on rwd volvos also. they're one of the first items to go when purchasing a used V, usually following removal of the door/seatbelt buzzer relay.

__________________
1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap)
new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped

Toyotas seem to have those too.

__________________
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

Brembo's technical drawing clearly shows a dowel hole required for this part number.

The original 201- number had the hole, but the EPC shows this was superceded/replaced by the 202- number, which apparently is hole-less.

__________________
Dave
Boise, ID
Check out my website photos, documents, and movies!

Constantly amazed by the things your are able to unearth!

So the the reference in the EPC must imply that removing the pin is perfectly fine with MB, correct?

__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

Basically, yes.

out, out, damn pin

__________________
1991 300D

And, with the rear brakes done on my 91, I am back to having all cars in perfect working order. Wonder how long that will last....

__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

I predict 3 1/2 days.

Come on, I'm sure there's something that needs doing! You fixed the window in the 190E yet?

I have a roughly ten-item list of stuff I need to do on the cars, starting with "Reinstall transmission"!

__________________
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

That's funny stuff, there. If you sacrifice a Honda to the Gods of Mechanical Things you might stretch your good luck out to a week.

Taken care of. There she goes...

Shertex, think your wife will let you torch Homer?

__________________
"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

My car has the pins still and I'm buying rotors that don't have a hole for the pin. I'll be doing this job soon. How does the pin come out? Hammer it out from the back? Does it unscrew?

IIRC my mechanic used a torch.

__________________
14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles
06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

Wonderful tool, that smoke wrench! I love mine! Seriously tho, a high speed cut off wheel works well with less heat. Follow it up with a quick light grind &/or polish till smooth, and you are good as new. Minimal heat distortion = less chance of brake pulsation.

I'm looking at the high speed balancing issue and possible bearing stress due to unbalanced surfaces.


Grinding down the pin after cutting 90% out with a cutter wheel keeps the weight and balance closer to original and you don't have to buy a torch.


I regularly use and like MAPP gas for a lot of small jobs instead of acetylene.


One junkyard near me does not allow acetylene, but allows MAPP gas and propane. Go figure.

__________________
Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6