[W126 Coupe] MBCOUPES Digest, Vol 89, Issue 15

[L&D gardner]

Hi Folks

Many thanks for the information,it looks like the dash may have to come out 
as I put the car in for an A/C regass today and they said the TX valve was 
blocked,it cost me $110 to find that out,thought I had covered most bases 
IE: rebuilt the compressor,new dryer,switch,hoses & 'o' rings,that will 
teach me to get all excited about the prospect of icy cold air!!.

I have seen one for sale on EBay from the US part number 126 830 0384 has 
star logo for $49.99.Mine has a Nippondenso Compressor so I am not sure if 
this is different to US spec models.I know there are a lot of Chinese  ones 
in the marketplace but quality could be an issue.

                                                                         Kind 
Regards Dan Gardner 1986 560 SEC Euro 220kw

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To: mbcoupes at mbcoupes.com
Subject: MBCOUPES Digest, Vol 89, Issue 15

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Today's Topics:

   1. Re: Vacuum Tube Coding (Dick Spellman)
   2. Re: Vacuum Tube Coding (Yousef)
   3. Re: Vacuum Tube Coding (Gary)


----------------------------------------------------------------------

Message: 1
Date: Thu, 13 Oct 2011 13:13:05 -0400
From: Dick Spellman <dick.spellman at gmail.com>
Subject: Re: [W126 Coupe] Vacuum Tube Coding
To: mbcoupes at mbcoupes.com
Message-ID: <4E971C21.4030405 at gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Dan,

I do not know of the color coding for the tubes but, have had to
troubleshoot and replace a few of the vacuum circuits in the past.
Basically you have the 3 or 4 vacuum take-off points on the motor.

Something like,
1.  The large brake booster line.
2.  The line to the emssions controls like egr, purge canister and air
pump if any apply on the euro in your country
3.  The smaller line to the firewall valve and one-way valve and splitter
4.  The line to the vacuum modulator on the transmission.

It's the line at the firewall (#3 above) that you are concerned with.
This should feed the vacuum resevoir in the fender and from there you
have distribution to the various systems under the dash   Like the hvac
distribution switching valve, the euro elevation lighting control in the
dash and the seat locking solenoid.  You need to pull the IC and knee
bolster to determine which color line is entering the cabin behind the
IC and from there you will see their individual routing to the
systems/devices.  You should be able to locate the seat solenoid valve
which will have electrical and vacuum connections down in and near the
steering column.  As I recall it gets hot so it is on the column clear
of any material other than steel..  Again, it is controlled by either
door pin switch which when door is closed, engine on; activates the
valve so the vacuum to seat-back lock is positive.   When any door is
opened or you depress the bleeder valve on the side of the seat,  the
seat back locks are automatically released.

I'd guess you need to check the state change on the appropriate door pin
switches to be sure the solenoid is being activated electrically then
move on to a probable vacuum leak from the firewall to the solenoid or
solenoid vac line to the seats.  Perhaps start with a check for voltage
at the solenoid connector with engine on, doors closed, if voltage
present, the solenoid is working. (as in open-allowing vacuum from
engine to flow past the solenoid plunger and to the seat back locks.)
Then check the vac line-in  to the solenoid for the presence of vac with
engine on, if none, replace the line through the dash to the firewall
valve and.or check the one-way valve at the firewall for damage.  If vac
is present, solenoid is working (open) then vacuum should be pulling at
the seat junction under each seat and seat locks should be active.  If
not, then replace the outbound solenoid vac line to the seat junctions
which runs in the under carpet plastic raceway along the floor by the
door sills and comes up from the carpet under each seat.  Last, each pin
switch can be checked with an ohm meter once isolated from the
electrical ground circuit wiring.

Good luck,

Dick

On 10/12/2011 11:52 PM, L&D gardner wrote:

> Hi Folks

>

> Does anyone know of a circuit diagram for the colour coded vacuum

> tubes,I am measuring 60kpa from the ivory tube from behind the engine

> to the bulkhead junction ,and the seats will lock @ 15kpa with a

> Mityvac at the same location on the bulkhead but the seats will still

> not lock as I seem to be getting losses from the dark red and yellow

> striped tube.Thanks

>

>

>

>                                                     Kind Regards Dan

> Gardner 1986 560 SEC (Euro 220kw)

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.



-- 
The information contained in this e-mail and the attachments, if any, is
legally privileged and CONFIDENTIAL.  It is intended solely for the use
of the individual or entity to whom it is addressed and others
authorized to receive it.  If you are not the intended recipient you are
hereby notified that any disclosure, copying, distribution, or taking
action in reliance of the contents of this information is strictly
prohibited and may be unlawful


------------------------------

Message: 2
Date: Fri, 14 Oct 2011 00:09:19 +0400
From: Yousef <usef4188 at gmail.com>
Subject: Re: [W126 Coupe] Vacuum Tube Coding
To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
Message-ID: <C8819E01-7314-4496-BBBD-D02183886C3F at gmail.com>
Content-Type: text/plain; charset=us-ascii

Hey Dan

If you want pictures of the vacuum lines for the interior i can take a few 
.. My dash and most of the interior is out..

Hope that helps

Yousef

Sent from my iPhone

On Oct 13, 2011, at 9:13 PM, Dick Spellman <dick.spellman at gmail.com> wrote:


> Hi Dan,

>

> I do not know of the color coding for the tubes but, have had to 

> troubleshoot and replace a few of the vacuum circuits in the past. 

> Basically you have the 3 or 4 vacuum take-off points on the motor.

>

> Something like,

> 1.  The large brake booster line.

> 2.  The line to the emssions controls like egr, purge canister and air 

> pump if any apply on the euro in your country

> 3.  The smaller line to the firewall valve and one-way valve and splitter

> 4.  The line to the vacuum modulator on the transmission.

>

> It's the line at the firewall (#3 above) that you are concerned with. 

> This should feed the vacuum resevoir in the fender and from there you have 

> distribution to the various systems under the dash   Like the hvac 

> distribution switching valve, the euro elevation lighting control in the 

> dash and the seat locking solenoid.  You need to pull the IC and knee 

> bolster to determine which color line is entering the cabin behind the IC 

> and from there you will see their individual routing to the 

> systems/devices.  You should be able to locate the seat solenoid valve 

> which will have electrical and vacuum connections down in and near the 

> steering column.  As I recall it gets hot so it is on the column clear of 

> any material other than steel..  Again, it is controlled by either door 

> pin switch which when door is closed, engine on; activates the valve so 

> the vacuum to seat-back lock is positive.   When any door is opened or you 

> depress the bleeder valve on the side of the seat,  the seat ba

ck locks are automatically released.

>

> I'd guess you need to check the state change on the appropriate door pin 

> switches to be sure the solenoid is being activated electrically then move 

> on to a probable vacuum leak from the firewall to the solenoid or solenoid 

> vac line to the seats.  Perhaps start with a check for voltage at the 

> solenoid connector with engine on, doors closed, if voltage present, the 

> solenoid is working. (as in open-allowing vacuum from engine to flow past 

> the solenoid plunger and to the seat back locks.)  Then check the vac 

> line-in  to the solenoid for the presence of vac with engine on, if none, 

> replace the line through the dash to the firewall valve and.or check the 

> one-way valve at the firewall for damage.  If vac is present, solenoid is 

> working (open) then vacuum should be pulling at the seat junction under 

> each seat and seat locks should be active.  If not, then replace the 

> outbound solenoid vac line to the seat junctions which runs in the under 

> carpet plastic raceway along the floor by t

he door sills and comes up from the carpet under each seat.  Last, each pin 
switch can be checked with an ohm meter once isolated from the electrical 
ground circuit wiring.

>

> Good luck,

>

> Dick

>

> On 10/12/2011 11:52 PM, L&D gardner wrote:

>> Hi Folks

>>

>> Does anyone know of a circuit diagram for the colour coded vacuum tubes,I 

>> am measuring 60kpa from the ivory tube from behind the engine to the 

>> bulkhead junction ,and the seats will lock @ 15kpa with a Mityvac at the 

>> same location on the bulkhead but the seats will still not lock as I seem 

>> to be getting losses from the dark red and yellow striped tube.Thanks

>>

>>

>> 

>> Kind Regards Dan Gardner 1986 560 SEC (Euro 220kw)

>> The MB Coupes Website!

>> W126 SEC Mailing List

>> Postings remain property of MB Coupes, L.L.C.

>

>

> -- 

> The information contained in this e-mail and the attachments, if any, is 

> legally privileged and CONFIDENTIAL.  It is intended solely for the use of 

> the individual or entity to whom it is addressed and others authorized to 

> receive it.  If you are not the intended recipient you are hereby notified 

> that any disclosure, copying, distribution, or taking action in reliance 

> of the contents of this information is strictly prohibited and may be 

> unlawful

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.



------------------------------

Message: 3
Date: Thu, 13 Oct 2011 17:21:43 -0700 (PDT)
From: Gary <garysalas at yahoo.com>
Subject: Re: [W126 Coupe] Vacuum Tube Coding
To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
Message-ID:
<1318551703.98757.YahooMailNeo at web113602.mail.gq1.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"

i would like to see those pictures.?



________________________________
From: Yousef <usef4188 at gmail.com>
To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
Sent: Thursday, October 13, 2011 1:09 PM
Subject: Re: [W126 Coupe] Vacuum Tube Coding

Hey Dan

If you want pictures of the vacuum lines for the interior i can take a few 
.. My dash and most of the interior is out..

Hope that helps

Yousef

Sent from my iPhone

On Oct 13, 2011, at 9:13 PM, Dick Spellman <dick.spellman at gmail.com> wrote:


> Hi Dan,

>

> I do not know of the color coding for the tubes but, have had to 

> troubleshoot and replace a few of the vacuum circuits in the past.? 

> Basically you have the 3 or 4 vacuum take-off points on the motor.

>

> Something like,

> 1.? The large brake booster line.

> 2.? The line to the emssions controls like egr, purge canister and air 

> pump if any apply on the euro in your country

> 3.? The smaller line to the firewall valve and one-way valve and splitter

> 4.? The line to the vacuum modulator on the transmission.

>

> It's the line at the firewall (#3 above) that you are concerned with.? 

> This should feed the vacuum resevoir in the fender and from there you have 

> distribution to the various systems under the dash?  Like the hvac 

> distribution switching valve, the euro elevation lighting control in the 

> dash and the seat locking solenoid.? You need to pull the IC and knee 

> bolster to determine which color line is entering the cabin behind the IC 

> and from there you will see their individual routing to the 

> systems/devices.? You should be able to locate the seat solenoid valve 

> which will have electrical and vacuum connections down in and near the 

> steering column.? As I recall it gets hot so it is on the column clear of 

> any material other than steel..? Again, it is controlled by either door 

> pin switch which when door is closed, engine on; activates the valve so 

> the vacuum to seat-back lock is positive.?  When any door is opened or you 

> depress the bleeder valve on the

side of the seat,? the seat ba
ck locks are automatically released.

>

> I'd guess you need to check the state change on the appropriate door pin 

> switches to be sure the solenoid is being activated electrically then move 

> on to a probable vacuum leak from the firewall to the solenoid or solenoid 

> vac line to the seats.? Perhaps start with a check for voltage at the 

> solenoid connector with engine on, doors closed, if voltage present, the 

> solenoid is working. (as in open-allowing vacuum from engine to flow past 

> the solenoid plunger and to the seat back locks.)? Then check the vac 

> line-in? to the solenoid for the presence of vac with engine on, if none, 

> replace the line through the dash to the firewall valve and.or check the 

> one-way valve at the firewall for damage.? If vac is present, solenoid is 

> working (open) then vacuum should be pulling at the seat junction under 

> each seat and seat locks should be active.? If not, then replace the 

> outbound solenoid vac line to the seat junctions which runs in the under 

> carpet plastic

raceway along the floor by t
he door sills and comes up from the carpet under each seat.? Last, each pin 
switch can be checked with an ohm meter once isolated from the electrical 
ground circuit wiring.

>

> Good luck,

>

> Dick

>

> On 10/12/2011 11:52 PM, L&D gardner wrote:

>> Hi Folks

>>

>> Does anyone know of a circuit diagram for the colour coded vacuum tubes,I 

>> am measuring 60kpa from the ivory tube from behind the engine to the 

>> bulkhead junction ,and the seats will lock @ 15kpa with a Mityvac at the 

>> same location on the bulkhead but the seats will still not lock as I seem 

>> to be getting losses from the dark red and yellow striped tube.Thanks

>>

>>

>>? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 

>>? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Kind Regards Dan 

>>Gardner 1986 560 SEC (Euro 220kw)

>> The MB Coupes Website!

>> W126 SEC Mailing List

>> Postings remain property of MB Coupes, L.L.C.

>

>

> -- 

> The information contained in this e-mail and the attachments, if any, is 

> legally privileged and CONFIDENTIAL.? It is intended solely for the use of 

> the individual or entity to whom it is addressed and others authorized to 

> receive it.? If you are not the intended recipient you are hereby notified 

> that any disclosure, copying, distribution, or taking action in reliance 

> of the contents of this information is strictly prohibited and may be 

> unlawful

> The MB Coupes Website!

> W126 SEC Mailing List

> Postings remain property of MB Coupes, L.L.C.

The MB Coupes Website!
W126 SEC Mailing List
Postings remain property of MB Coupes, L.L.C.
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