Re: [diesel_mercedes] Cold Weather & Master Cylinders

 

The two times I hit the brakes and nothing happened, it was not cold. I better replace this thing one of these days. Max

On Sat, Aug 15, 2015 at 8:14 AM, vwnate1@yahoo.com [diesel_mercedes] <diesel_mercedes@yahoogroups.com> wrote:


In Commercial Service , you always know when Fall arrives as so do the multitude of failed Master Cylinders ~

cold most definitely affects them .


Not the calipers etc. but internal by passing of the fluid .


-Nate




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Posted by: Max temple <jasperezra@gmail.com>
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Re: [diesel_mercedes] Brakes

 

I have a 1980 240 4-spd and this has happened to me twice. I bought a new master for around $100 but have not installed it yet. I think I got it from Arizona parts Haus. My car sits all winter every winter but gets driven once a week in non winter.  Max

On Sat, Aug 15, 2015 at 6:33 AM, diyernh diyernh@comcast.net [diesel_mercedes] <diesel_mercedes@yahoogroups.com> wrote:
Check your master cylinder.  Look through or in the reservoir.  If the
fluid is dark and dirty, your master cylinder seals are degrading.  This
is the only way I know to loose pedal pressure and not be leaking fluid
somewhere.

The seals don't seal, allowing the fluid to pass by, picking up the
black rubber particles and feeding them back to the reservoir.

I believe rebuilt master cylinders are available and not too expensive.
Be careful who you buy it from.  Some stores have a lifetime warranty,
but the brand new ones leaked immediately and never worked.

Cold doesn't matter to brake fluid/parts.  You may have had the seals
stick due to sitting too long and they tore.

Carl



On 8/14/2015 11:17 PM, klinkelis@yahoo.com [diesel_mercedes] wrote:
>
>   I have a 1980 240 D with a manual transmission. The car sits most of
> the winter, and the Pennsylvania winter was very cold. After driving
> the car in the country  for a while, say longer than thirty minutes
> the Brake petal just goes away, No petal. I changed the rear Caliphers
> and lines with a used set of caliphers. It worked fine for a few days
> and then it came back. After stopping, with out hitting anything. :-)
>  The petal slowly comes back and the brakes are nice and hard. I do
> not think it is a vacuum problem, because  the petal goes to the
> floor.  I have not been able to find any rebuild kits. thanks for any
> help bob k.
>
>



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Posted by: diyernh <diyernh@comcast.net>
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Posted by: Max temple <jasperezra@gmail.com>
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[diesel_mercedes] Re: 300D Generator

 

It's really easy to wire a momentary switch to a 20amp solenoid.  You want something that will take the amps and not burn up.  A switch will not do it.  Lawrence Rhodes 

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Posted by: Lawrence Rhodes <primobassoon@sbcglobal.net>
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[diesel_mercedes] New (old) Fuel Tank Report

 

the 21 gallon one I put in the 1981 240D ~ I am loving it ! .

443 miles and I still have 1/3 tank according to the fuel gauge .

Still a little dark color to the fuel  in the clear plastic primary intake fuel screen so I'll run it to nearly dry and fill up , add Startron and hope fully that'll be the end of it .

This is why I keep hammering away to NEVER use those crappo translucent intake screens ! you cannot possibly see the dirt and/or fungus until it's a serious problem unless you have the clear filter as God and Mercedes - Benz intended .

-Nate


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Posted by: vwnate1@yahoo.com
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[diesel_mercedes] Cold Weather & Master Cylinders

 

In Commercial Service , you always know when Fall arrives as so do the multitude of failed Master Cylinders ~

cold most definitely affects them .


Not the calipers etc. but internal by passing of the fluid .


-Nate

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Posted by: vwnate1@yahoo.com
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[diesel_mercedes] Re: Brakes

 



In cold weather ? .

Sounds like classic master cylinder failure caused by internal by passing .

It's possible to overhaul it but I'd just buy a new one before you crash into something and ruin the entire car .

-Nate
       Bob  wrote :

  I have a 1980 240 D with a manual transmission. The car sits most of the winter, and the Pennsylvania winter was very cold. After driving the car in the country  for a while, say longer than thirty minutes the Brake petal just goes away, No petal. I changed the rear Caliphers and lines with a used set of caliphers. It worked fine for a few days and then it came back. After stopping, with out hitting anything. :-)  The petal slowly comes back and the brakes are nice and hard. I do not think it is a vacuum problem, because  the petal goes to the floor.  I have not been able to find any rebuild kits. thanks for any help bob k. 

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[diesel_mercedes] Re: 300D Generator

 



Sounds good ! .

Be sure to leak test the valves before buttoning it up .

Remember too : the shut off lever on the I.P. , you don't need vacuum for anything else .

Turbo or N/A 300D ? .

NOT ' crazy ' ! .

 -Nate
      Randymc9001@...> wrote :

   I was looking for a diesel engine to couple to a 3 phase generator, and found a 300D. The guy I bought it from had broken the timing chain somehow. Other than that he had built a great engine. First question: When I install the timing chain can I get the vac pump 180 degrees off? Second question can the engine run with no wiring other than the starter.

    Yes I'm crazy! Maybe. but I believe a man has to have an incredible challenge going on to be happy.

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RE: [diesel_mercedes] Brakes

 

Very well done. I agree.  Bill in Oregon


From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com]
Sent: Saturday, August 15, 2015 7:45 AM
To: diesel_mercedes@yahoogroups.com
Subject: RE: [diesel_mercedes] Brakes

 

Your master cylinder should be replaced.  Get a new one. If you have a booster, replace it as well.

Also check the vacuum pump, as worn seals will cause oil to migrate to the booster and ruin

the internals.  Thought this would be easy??   Check your brake hoses while your at it.  I had

a problem with the liner inside the hose (right front) that acted like a check valve.  Someone on this

forum suggested that, and was correct.  

Bench bleed the master cylinder prior to installation.  Be sure you get a bench bleeding kit with the

MC.  They are plastic and may not work well.  I bought a couple of pieces of metric brake tubing and

made my  own, which made the bench bleeding much easier. 

Parts are available from the usual suspects that advise on this forum.   NAPA had the brake hoses in stock,

and they were Semperit brand.  Also had the front brake calipers. Otherwise I used a local MB parts house

in Oakland, Ca. 

Rebuilding the vac pump is easy.  Keep track of how things come apart, take photos as you go along.  There

is a vid on YouTube.

 

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Posted by: <corvallis@peoplepc.com>
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RE: [diesel_mercedes] Brakes

 

Your master cylinder should be replaced.  Get a new one. If you have a booster, replace it as well.

Also check the vacuum pump, as worn seals will cause oil to migrate to the booster and ruin

the internals.  Thought this would be easy??   Check your brake hoses while your at it.  I had

a problem with the liner inside the hose (right front) that acted like a check valve.  Someone on this

forum suggested that, and was correct.  

Bench bleed the master cylinder prior to installation.  Be sure you get a bench bleeding kit with the

MC.  They are plastic and may not work well.  I bought a couple of pieces of metric brake tubing and

made my  own, which made the bench bleeding much easier. 

Parts are available from the usual suspects that advise on this forum.   NAPA had the brake hoses in stock,

and they were Semperit brand.  Also had the front brake calipers. Otherwise I used a local MB parts house

in Oakland, Ca. 

Rebuilding the vac pump is easy.  Keep track of how things come apart, take photos as you go along.  There

is a vid on YouTube.

 

From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com]
Sent: Friday, August 14, 2015 8:18 PM
To: diesel_mercedes@yahoogroups.com
Subject: [diesel_mercedes] Brakes

 

 

  I have a 1980 240 D with a manual transmission. The car sits most of the winter, and the Pennsylvania winter was very cold. After driving the car in the country  for a while, say longer than thirty minutes the Brake petal just goes away, No petal. I changed the rear Caliphers and lines with a used set of caliphers. It worked fine for a few days and then it came back. After stopping, with out hitting anything. :-)  The petal slowly comes back and the brakes are nice and hard. I do not think it is a vacuum problem, because  the petal goes to the floor.  I have not been able to find any rebuild kits. thanks for any help bob k. 


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Posted by: "Atwood,Warren" <Warren.Atwood@altramotion.com>
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Re: [diesel_mercedes] Brakes

 

Check your master cylinder. Look through or in the reservoir. If the
fluid is dark and dirty, your master cylinder seals are degrading. This
is the only way I know to loose pedal pressure and not be leaking fluid
somewhere.

The seals don't seal, allowing the fluid to pass by, picking up the
black rubber particles and feeding them back to the reservoir.

I believe rebuilt master cylinders are available and not too expensive.
Be careful who you buy it from. Some stores have a lifetime warranty,
but the brand new ones leaked immediately and never worked.

Cold doesn't matter to brake fluid/parts. You may have had the seals
stick due to sitting too long and they tore.

Carl

On 8/14/2015 11:17 PM, klinkelis@yahoo.com [diesel_mercedes] wrote:
>
> I have a 1980 240 D with a manual transmission. The car sits most of
> the winter, and the Pennsylvania winter was very cold. After driving
> the car in the country for a while, say longer than thirty minutes
> the Brake petal just goes away, No petal. I changed the rear Caliphers
> and lines with a used set of caliphers. It worked fine for a few days
> and then it came back. After stopping, with out hitting anything. :-)
> The petal slowly comes back and the brakes are nice and hard. I do
> not think it is a vacuum problem, because the petal goes to the
> floor. I have not been able to find any rebuild kits. thanks for any
> help bob k.
>
>

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Posted by: diyernh <diyernh@comcast.net>
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.

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