RE: [Chrysler300] '64 Brake MC/Booster Question

[Mark Souders <souders@xxxx>]

I just went through this very problem last week. The guy at National Auto
Parts said that this same master cylinder is listed for later cars with a
dual system. They are not, however, listed for cars with dual chamber
master cylinders, I think after 1966, Mopars had the dual master cylinder. A
simple pipe plug in the bottom hole is the fix. Also, don't bench prime the
master cylinder since the plunger can be damaged if the piston is pushed too
far into the cylinder. I rigged up a piece of scrap metal line to
recirculate the fluid and primed it after it was installed on the booster. I
still have a low pedal, the book says don't adjust the rod?

Mark Souders


> -----Original Message-----
> From:	john_nowosacki@xxxx [SMTP:john_nowosacki@xxxx]
> Sent:	Wednesday, May 21, 2003 7:06 AM
> To:	jkrestor300@xxxx; Chrysler300@xxxxxxxxxxxxxxx;
> terrytown@xxxx
> Subject:	RE: [Chrysler300] '64 Brake MC/Booster Question
> 
> Just taking a wild guess on the master cylinder issue, but I think it
> might have to do with versions of the master that could (or used to) have
> a hydraulic brake light switch mounted on the front of the cylinder, and a
> brake line coming out from the bottom (like '57). If that unit is then
> rebuilt after being taken in as a core, and remanufactured as a later
> model for use on cars that have mechanical switches mounted on the brake
> pedal, one of the holes must be plugged.
> John
> 
> -----Original Message-----
> From: Kelly Pierce [mailto:jkrestor300@xxxx]
> Sent: Tuesday, May 20, 2003 10:57 PM
> To: 300 List Posts; Terry Town
> Subject: Re: [Chrysler300] '64 Brake MC/Booster Question
> 
> 
> Terry and Group-
> This one got my curiosity up so I just went out and looked at the 5 64
> Chryslers I have here at home.
> K hardtop, build date 9/12/63 Midland Ross unit, no plug on M/C 413
> engine
> 300 sport 4 dr. parts car-2/13/64 Same, has plug on bottom of M/C 383
> 2barrel Newport/300"one of
> none" wagon- Midland Ross, no plug 361 2 barrel(for now)
> 300 Sport 2drht. Same, has plug on bottom of M/C 383 2 barrel
> K hardtop, Kelsey Hayes unit, no plug 413 engine
> Now- the Service Technical Manual doesn't even list a Kelsey Hayes unit! I
> have owned the car since 1982, never changed the booster, looks to be
> original. None of the photos in the manual show a master cylinder with the
> "extra" plug like 2 of mine have. Neither one of the K's are ram cars, so
> the remote booster does not come into the equation.
> It doesn't appear that there is any real pattern here that I can see.
> Any one out there got a answer for Terry? It would appear that all my
> investigation has done is muddied the waters! The factory parts manual
> lists ONE booster for the 64 Dodge 880, Newports, 300 & 300K non ram and
> the
> New Yorker-2525428. The master cylinder shows the same part number for
> ALL
> 64 Chrysler products with power brakes (except ram K) 2275519.
> Joe Pierce 300J+Kx3+M+ others.....
> ----- Original Message -----
> From: "Terry Town" <terrytown@xxxx>
> To: "300 List Posts" <Chrysler300@xxxxxxxxxxxxxxx>
> Sent: Tuesday, May 20, 2003 2:44 PM
> Subject: [Chrysler300] '64 Brake MC/Booster Question
> 
> 
> > I'm confused and hoping someone can help me out. I have a '64 300 Sport
> with a 383 and power brakes. I need a new brake master cylinder, so the
> local NAPA sells me one. NAPA part # 10-36706, it looks very similar to
> the
> existing one, but has an additional downward pointing outlet just under
> the
> regular horizontally pointing outlet. The second outlet is capped off with
> a
> plug, so I figure that the unit will still work fine. When I got the old
> master cylinder off I compared the two. The NAPA one has a casting number
> on
> the bottom of the unit of 2265634. My old one has a casting # of 2265633.
> Hmmmm. I then noticed that the receptacle depths for the pushrod in the
> back
> of the MC piston are different between the two MCs. The NAPA one is about
> .95" deep and my old one is 1.25" deep. I thought that maybe it's as
> simple
> as adjusting my pushrod shorter, so it doesn't stick out as much from the
> power booster unit. I looked in the factory service manual for adjustment
> info and here is where I got really confused. My power booster visually
> appears to be a Bendix Dual Diaphragm type, and the FSM clearly states
> that
> these are for Imperials only. (It also says to NOT adjust the pushrod)
> >
> > Did 300 Sports come with the Bendix dual diaphragm unit? If so, does
> anybody know a NAPA part # for the proper MC to use with this booster
> unit?
> Or do I need to just adjust the pushrod in about .3"?
> >
> > If the booster unit isn't the proper one for the car, I'd like to
> replace
> it with the proper one. Any thoughts on where these might be available,
> part
> numbers (NAPA or otherwise) to ask for, etc.
> >
> > Any help from the group would be appreciated.
> >
> > Thanks,
> > Terry Lynch
> > St. Petersburg, FL
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
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> 
> 
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