1940 P9 MASTER CYLINDER REMOVAL

[Daddyscar]

We are having trouble removing the master cylinder from the car. Is there some trick? I have a Shop Manual and the original service manual 

I can not find anything on the actual removal . There is a stub that is attached to the brake pedal that sits inside a receptacal in the master cylinder. It does not thread in so if the mount bolts and brake line is removed why can't the master cylinder simply be lifted out.

Edited July 29, 2017 by Daddyscar
addition info added

[Don Coatney]

Not the same as a P-15

[Daddyscar]

I am assuming you had to remove a floor pan? I just don't see how that can be done on this P9. Also my master cylinder looks different. The clutch does not attach to the MC.

I have attached photos of new as well as old still attached to the car (obviously). I just can't figure out what is holding the piston push rod inside. Item number 6 in fig 53

 

 

 

 

Edited July 29, 2017 by Daddyscar
add photos and more information

[desoto1939]

I have the same MC in my 39 Desoto and the one that you have in your car. Assuming that the unit is unbolted from the fram and als the unit is disconnected from the brake pedal. The main push rod should have a nut on the end the push rod just slides into the back of the cup of the piston.  There isa  spring  clip that fits into an inner circle that prevents the piston from backing out of the MC.  The spring clips is removed with a screw driver and then the entire brass piston should slide out. I would squirt some Silicone in the hole that has the push road. There might be some harden crap and or rubber that has gotten hard over time. The rod should just fall out but you might have to work this to get it loose.

Call me i live near philadelphia PA   Cell 484-431-8157  Home 610-630-9188    Desoto1939@aol.com

Rich Hartung

[Daddyscar]

Thanks Rich!

The cylinder is unbolted; more precisely, the the bracket is unbolted from the frame, but the bracket and MC are still together. I have a "new" MC to put in its place, so I won't need to remove the innards of the cylinder itself.

What is most confounding though, is that, yes, the rod should simply fall out, or I should be able to simply lift the MC out the car leaving the rod hanging off of the pedal.

The boot was completely shot, so there's no telling how long or how much corrosion could be in there. AFAIK, it's been a California car all its life and in a garage for the last 20 some years. I'll continue trying to break the rod loose, and if I have to, I may just take it out piece by piece (piston out, etc)

Hopefully some more folks with P9 experience will chime in. I worked on the Plymouth and a toilet today; toilet is fixed, the Plymouth...not so much.

BTW, I'm originally from the Kutztown area. (I'm responding on behalf of my wife who has started this thread)

 

[desoto1939]

1 hour ago, Daddyscar said:

Thanks Rich!

The cylinder is unbolted; more precisely, the the bracket is unbolted from the frame, but the bracket and MC are still together. I have a "new" MC to put in its place, so I won't need to remove the innards of the cylinder itself.

What is most confounding though, is that, yes, the rod should simply fall out, or I should be able to simply lift the MC out the car leaving the rod hanging off of the pedal.

The boot was completely shot, so there's no telling how long or how much corrosion could be in there. AFAIK, it's been a California car all its life and in a garage for the last 20 some years. I'll continue trying to break the rod loose, and if I have to, I may just take it out piece by piece (piston out, etc)

Hopefully some more folks with P9 experience will chime in. I worked on the Plymouth and a toilet today; toilet is fixed, the Plymouth...not so much.

BTW, I'm originally from the Kutztown area. (I'm responding on behalf of my wife who has started this thread)

 

One of my daughters is a KU grad 2012 and my other is a Senior this year at KU.  They are both Graphic design majors.  I live near Valley forge just off of US 422 near Oaks/Audubon.  Small world where is Lancaste Ca in relation to Oakland and San Fran. i rode a bicycle across the county and came into Ca at Lake tahoe then to sacrmento and then down via the canals system down to Alameda to see my friend in the Naval Station.  I know this Master Cylin so call me and I might be able to help the setup is the same as in the Plymouth. What town are you from near KU.

Rich Hartung   cell 484-431-8157  home 610-630-9188

[pflaming]

Lancaster, CA is some 400 miles south of Oakland and possibly 150 mikes northeast of Los Angeles. It is in the high desert between LA and Las Vegas. 

[Daddyscar]

More like 60 miles North to North East  of LA :-) . A horribly hot place to live in the summer. 

 

 

 

 

[Daddyscar]

17 hours ago, desoto1939 said:

One of my daughters is a KU grad 2012 and my other is a Senior this year at KU.  They are both Graphic design majors.  I live near Valley forge just off of US 422 near Oaks/Audubon.  Small world where is Lancaste Ca in relation to Oakland and San Fran. i rode a bicycle across the county and came into Ca at Lake tahoe then to sacrmento and then down via the canals system down to Alameda to see my friend in the Naval Station.  I know this Master Cylin so call me and I might be able to help the setup is the same as in the Plymouth. What town are you from near KU.

Rich Hartung   cell 484-431-8157  home 610-630-9188

My husband grew up in Kutztown- not too far from KU

 

Back to the task at hand-

Rich - 

Thank you for the information and offer to assist. My Husband woke up early-before the oppressive heat of the sun- and was finally able to remove the MC. Apparently,  it absolutely MUST be removed from the bracket that holds it to the frame. This may sound obvious but with no ability to see whats going on down there and no instructions in manual he thought that it would be easier to just remove the bracket. There are many parts of the car that hinder access and line of sight to the mounting bolts of the MC. The linkage  goes through the mounting bracket . So that is what was keeping us from simply removing the Master Cylinder. The last time I worked on this car my Dad and I had all of the body work off the front end of the car. This made things MUCH easier. The mounting bracket is not mentioned or shown in the Shop manual nor the Service Manual. Go figure!

[medium_jon]

It is a mighty fine looking car. And it is very neat that you got to work on it with your dad. 

[Niel Hoback]

That's a beauty, all right.