New Calipers have the same casting #

[woodyk]

Just had my calipers replaced and when I inspected the installation of the calipers I noticed that they have the same casting number as the old ones--is this correct of did I get some new old ones??

WoodyK
2004 Allegro Bag

[MntDriver]

I believe the casting number will be the same, but the new calipers are silver in color, where your old calipers are black. Maybe DriVer or Edgray can chime in here.....

[DriVer]

Quote:

Originally Posted by woodyk Just had my calipers replaced and when I inspected the installation of the calipers I noticed that they have the same casting number as the old ones--is this correct of did I get some new old ones?

No that's exactly right .. same casting number. The number that actually changed is in the bottom of the piston.... It's a "B."

[edgray]

And the new "final fix" calipers are susposed to have a date code stamped in the caliper right below the casting number. Here is a paste of the wording from the .pdf:

2x66mm with 29502B and 0.01” PTBC Identification

\\sbddata1\data\Dept\EMT\Shared\EMT1\ZOHT\Projects _Active\WCC Reference\FIL
20100630 2x66mm 0.01 PTBC Identification.doc
On June 4

th 2010, the Bosch 2x66mm MHT caliper transitioned from 29502 to 29502B piston
material, a larger piston to bore clearance (PTBC) of 0.01”, and a 0.004” increased seal squeeze.
Calipers were also plated before machining, leaving the machined surfaces, such as the caliper
ears and caliper leg faces that contact the outer shoe plate un-plated. The new calipers can be
identified via the caliper assembly date code, by the letter “B” molded into the bottom of the
piston, or by the lack of plating on the caliper ear or caliper leg surfaces.
The caliper assembly date code is etched into the part just below the cast in casting part number
4153269 as shown below.



The first date code was 0155A.
First character represents the year:



9.0.1.2.3.4.5.6.7.8. - Thus, the digit “9” represents 2009;
0==2000 or 2010, etc. First character to repeat each decade.



The second, third, and fourth characters represent the day of the year. Three characters
should always be used the figure 0 begin used where necessary, as follows:
009 = ninth day of the year
042 = forty second day of the year
231 = two hundred and thirty first day of the year



Shift shall be shown by the fifth character as follows:
A = 1st shift
B = 2nd shift

C = 3rd shift

[DriVer]

Quote:

Originally Posted by edgray And the new "final fix" calipers are susposed to have a date code stamped in the caliper right below the casting number. Here is a paste of the wording from the .pdf:

Yep! Exactly.

I'm surprised that Woodyk missed all the stuff that we have here on the new calipers.

[woodyk]

Thanks for the info--I've been out of the net lately due to building our new retirement home in Burnet, TX. Moved from AL to TX in late Sept. The hourse was supposed to have been finished--Had to live in the MH until last week. Anyway long story -- I finally in the house and had the MH worked on last week -- Good news was that all the work that I did in replacing the old Calipers last Dec with all new parts proved to help for the Workhorse facility said that their problems was get replacements hardware for the new calipers did not come with them. All the rotors and pads were ok. So I had no out of pocket expense. Thanks again for the ino and now that my internet is back up and running I start getting better infor with you guys. This web site is AWESOME--Thanks again!!

WoodyK

[jdsr]

Quote:

Originally Posted by MntDriver I believe the casting number will be the same, but the new calipers are silver in color, where your old calipers are black. Maybe DriVer or Edgray can chime in here.....

Some of the old/def calipers were silver as well.

[woodyk]

Driver,

Just checked my date code and it's a 0208A on all four calipers. Thanks again for the info.

Woodyk

[oemtech]

Quote:

Originally Posted by jdsr Some of the old/def calipers were silver as well.

Buzzzzz.... Wrong answer.

Yes, they are the same size 66mm but they are properly clearanced and have the high temp phenolic coating. Does this mean they will never seize? No... If the conditions are right any caliper piston can seize, even the SS version.

If you will check with any of the people that put the B&W Brake replacement 66mm calipers on, none of them have had a problem to date. Why? Because they got exactly what Bosch is NOW installing in the recall.

Remember, there are only 2 manufactures of phenolic pistons and only 2 approve formulas for the phenolic coating.

What is your solution?

[oemtech]

Quote:

Originally Posted by woodyk Thanks for the info--I've been out of the net lately due to building our new retirement home in Burnet, TX. WoodyK

Give a call and maybe we can meet for coffee and tour the air museum in Burnet.

[jdsr]

Quote:

Originally Posted by oemtech Buzzzzz.... Wrong answer. Yes, they are the same size 66mm but they are properly clearanced and have the high temp phenolic coating. Does this mean they will never seize? No... If the conditions are right any caliper piston can seize, even the SS version. If you will check with any of the people that put the B&W Brake replacement 66mm calipers on, none of them have had a problem to date. Why? Because they got exactly what Bosch is NOW installing in the recall. Remember, there are only 2 manufactures of phenolic pistons and only 2 approve formulas for the phenolic coating. What is your solution?

WOW, what are you talking about. What is "buzzz wrong answer". I made a simple statement about the "color of the caliper and here it is again, "Some of the old/def calipers were silver as well". I was responding to mtndriver and the way I read or understood or maybe misunderstood part of his post is it sounded like he was saying if the calipers someone has now is silver they will be the new calipers that are being placed to satisfy the recall. What I stated is just because they have silver calipers doesnt mean they have the new design calipers because I have silver calipers that were placed in july and aug of 2007. Long before wh even admitted it had a brake problem. I said nothing about 66m or who mfg them or the type of phenolic material being used. I didnt want someone looking under their mh and poss see silver calipers and think they have the new recall calipers. Nothing more, nothing less.

[oemtech]

Quote:

Originally Posted by jdsr WOW, what are you talking about. What is "buzzz wrong answer". I made a simple statement about the "color of the caliper and here it is again, "Some of the old/def calipers were silver as well". I was responding to mtndriver and the way I read or understood or maybe misunderstood part of his post is it sounded like he was saying if the calipers someone has now is silver they will be the new calipers that are being placed to satisfy the recall. What I stated is just because they have silver calipers doesnt mean they have the new design calipers because I have silver calipers that were placed in july and aug of 2007. Long before wh even admitted it had a brake problem. I said nothing about 66m or who mfg them or the type of phenolic material being used. I didnt want someone looking under their mh and poss see silver calipers and think they have the new recall calipers. Nothing more, nothing less.

Ooops my bad... I read your statement as they are the same old calipers. Please accept my apology.

[jdsr]

Quote:

Originally Posted by oemtech Ooops my bad... I read your statement as they are the same old calipers. Please accept my apology.

No problem. I had to reread my post about 10 times to make sure I didnt screw up. Im alittle slow sometimes. safe travels

[DriVer]

Of the 4 calipers that we recalls on my rig, 2 were silver and 2 were not.