Disassembly Bendix Brake Booster
#1823981
05/11/15 05:03 AM
05/11/15 05:03 AM
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Joined: Jul 2005
Posts: 636 Graz, Austria
DGS
OP
mopar
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OP
mopar
Joined: Jul 2005
Posts: 636
Graz, Austria
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How do I take a Bendix disc brake booster apart? I managed to separate the housing halves, remove the larger hex nut, the metal dish and first rubber diaphragm underneath. I also took out the push-rod (for the master cylinder). Now I'm stuck: there is a black dish like separator between the two halves of the booster (seems to be a phenolic resin) I can't get out. How do you remove it? I can move the cylinder in the center back and forth. Should the phenolic separator just fall out? There is quite a bit of rust in the booster - maybe it is rusted to the housing? It should be part B in this drawing: any ideas? Thanks
Last edited by DGS; 05/11/15 05:42 AM.
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Re: Disassembly Bendix Brake Booster
[Re: DGS]
#1824096
05/11/15 12:50 PM
05/11/15 12:50 PM
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Joined: May 2003
Posts: 1,751 Graham, WA
Polarapete
top fuel
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top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
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This is not a unit that is made to be serviced by the average guy. If you can get a rebuilt unit from a local auto parts store or www.rockauto.com I would do that. FYI, I took apart the PB can on my '86 Ramcharger, but that was only to trim it down to where I could weld the halves together, less the guts. I needed to make the transition from the 4 bolt mounting on the firewall to the 2 bolt mount on the new race master cylinder. I don't have the ability to machine a pretty aluminum block to make the adaptation, so that is what I did to accomplish the job. It works for me.
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer
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Re: Disassembly Bendix Brake Booster
[Re: DGS]
#1824249
05/11/15 04:02 PM
05/11/15 04:02 PM
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Joined: May 2003
Posts: 1,751 Graham, WA
Polarapete
top fuel
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top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
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I don't really know what makes this special, because I never intended to reuse the one I took apart. It is likely that the way it is assembled in the factory makes it difficult to disassemble it and securely reassemble it. That is why it is best to buy a remanufactured part rather than try to repair it yourself. You did not specify what year and make vehicle this came from (Mopar, I am sure) So I picked the '68 to '70 B-Body chassis and found on www.rockauto.com a listing for the booster with and without a new master cylinder and the outright prices are less than $150.00 + shipping for the most expensive unit. I quoted "Outright" because, since you have taken your "core" apart, I don't think they would take it as a core. Besides, shipping a $50.00 core from Europe does not seem to be a cost effective idea. Just my I am sure that www.rockauto.com will ship to you. All you need is a shipping address and a credit card. UPS and FedEx make deliveries all over the world every day.
Last edited by Polarapete; 05/11/15 04:05 PM.
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer
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Re: Disassembly Bendix Brake Booster
[Re: 469runner]
#1824549
05/11/15 09:55 PM
05/11/15 09:55 PM
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Joined: Feb 2005
Posts: 356 minnesota
billyfury
enthusiast
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enthusiast
Joined: Feb 2005
Posts: 356
minnesota
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The original booster on my 72 Imperial has super nice original plating. It is a dual diaphragm an one of the two had failed. I sent it to Booster Dewey and could not have been more pleased with the result. billyfury 70-71 Fury collector, www.sportfurygt.com
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Re: Disassembly Bendix Brake Booster
[Re: billyfury]
#1824895
05/12/15 12:51 PM
05/12/15 12:51 PM
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Joined: Jul 2005
Posts: 636 Graz, Austria
DGS
OP
mopar
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OP
mopar
Joined: Jul 2005
Posts: 636
Graz, Austria
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I poured some evaporust in the gap between the spacer and the can (figure 96) - maybe that will do the trick. Expanding the can isn't really doable and heat will probably damage the diaphragm. If you can figure out where to buy new diaphragms please let us know. I had no luck with that.
billyfury The first one I took out looked fine - I hope that the second one is in good shape as well.
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