66mm Bosch Calipers

[DriVer]

The next 3 pictures are ZOHT type 66mm hydraulic pin slide dual piston calipers.

The first example is Freightliner FRED (sorry I didn't get a better shot) You can see the rubber collar on the leading pin, front axle position.



The second shot here is a 2011 Ford F53 Super Duty, rear axle position.



This third shot is a 2010 Workhorse W20D rear axle position



Robert Bosch supplies the 4153269 66mm caliper to a number of OEMs that I don't have pictures for. I understand that Peak Chassis were also using Bosch calipers. There are many commercial applications for these calipers.

Here is another version of a Bosch caliper. It's a 73mm which is used on the front axle of the 2011 Ford F-53 Super Duty RV Chassis from 24 to 26K GVWR. The Ford 20.5 and 22K use 66mm calipers on the front and rear axle.



This is a Bosch 66mm caliper seen on the front axle position on a 2010 W22 motor home.



Here is a picture of my 4153269 - 18 month old caliper on my front axle position. I have a 2003 W22. All 4 calipers look the same and are OE replacements I obtained at my service center here in Myrtle Beach. Still working!



My picture doesn't look as polished as all the others because my W22 has 85,000 miles on it. I replaced all the componets on all 4 wheels in July of 2008. Why? Because I wore my brakes completely out and began scoring the rotors with the pad back plates. The calipers never did seize.

[CoastieSCPO]

Good stuff Mike........thanks!


Bob

["007"]

So that would put about 65,000 to 70,000 miles on original brake system about the same I had on a Ford chassis when I had to have a brake job.
Thanks for the pic's.