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  #1  
Old 07-18-2010, 02:05 AM
gastropodus's Avatar
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Caliper question

Hi, I bought rebuilt calipers for my rear wheels at the local parts shop, and discovered an anomaly: my old calipers have a sheet metal piece attached to each caliper cylinder, with little tabs that limit how far in toward the center the pads can go (see first picture). One of the rebuilt (Bendix) calipers has that same feature, and one doesn't. Should I be concerned about the one that just has the cylinder and rubber visible (second picture), with no sheet metal covering it?

Kurt

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Caliper question-p1010124.jpg   Caliper question-p1010125.jpg  
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Old 07-18-2010, 02:30 AM
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Were the Originals you turned in as cores also Bendix?
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Old 07-18-2010, 04:26 AM
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The pads are held in place by the pins, not those shields. I am surprised the rebuilt ones dont have them. Its important when buying parts like that to compare your originals with the new part at the store. Are you saying that one of the new ones has the shield & the other new one doesnt? If so I would take them back & make sure you get 2 identical ones. Alt, if you have the old ones, you could take the shield of one of them & fit it to the remanufac one thats missing it.
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  #4  
Old 07-18-2010, 09:34 AM
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Quote:
Originally Posted by Diesel911 View Post
Were the Originals you turned in as cores also Bendix?
Yes. The boxes of both say they were remanufactured by Duralast, but there other differences, too: one is grey, and the other is shiny gold. I guess it just seems to me that the shield may have a function beyond acting as a stop for positioning the pad during installation. It might act as a dust or heat shield? I see that the caliper pictures on Fastlane show both situations: with and without.

Kurt
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- '79 240D - engine swap complete! Engine broken in! 28-31 mpg! Lovin' the ride!
- '86 190D (W201-126) - 2.5 NA engine, 5 speed, cloth interior, manual climate controls, 33-34 mpg (sold to forum member).
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  #5  
Old 07-18-2010, 09:45 AM
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The metal plate is the heat shield. It'll protect the rubber dust cap from heat and prolong it's life.

Whether it should be there may depend on the brand of the re-man. Per the FSM, the Bendix has a heat shield, the Teves and Girling do not. You may have gotten two different types of re-mans. There's a note in the FSM that says calipers from different manufacturers may be installed on the rear axle, so it might be your choice to proceed or return one and try for a matched set.

Regardless, if you go with the Bendix, make sure the heat shield is firmly seated into the piston. That little cut out on the piston corresponds to a clock position. If it's wrong, the heat shield won't fit and the pads won't fit...etc. Voice of experience rebuilding the calipers from the PO on my 300CD.
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  #6  
Old 07-18-2010, 02:18 PM
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Just for the record ATE calipers for a 123 also have heat shields
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  #7  
Old 07-18-2010, 03:27 PM
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Quote:
Originally Posted by Army View Post
Just for the record ATE calipers for a 123 also have heat shields
Just to keep the record accurate, some don't. Especially when they are on the rear axle.

To wit:
http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1982@@1982&makeid=63@@MERCEDES+BENZ@@X&modelid=6190%3AED%7C10000135%3AMBC%7C1504@@300D&catid=241658@@Brake&subcatid=241674@@Brake+Caliper&applicationid=W0133-1606210&mode=PA
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Old 07-18-2010, 09:02 PM
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Both my w123's have heat shields on the rear calipers (ATE). Maybe they have been deleted more recently.

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I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving
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