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

[Ernie]

I didn't know what a crow foot was for until I replaced this valve; you will be ok if you have the tool.

Ernie
Sent from my iPad


On Oct 18, 2011, at 5:51 AM, "mavris2 at gmail.com" <mavris2 at gmail.com> wrote:


> If the thermal expansion valve (txv)  the dash does not have to come out.  It's located above the gas pedal.  It's not fun to get out.  You'll need crows foot wrenches and or line wrenches.  Been a while that I have done one.   

> 

> Jason 

> 

> 

> L&D gardner <cruftsk9 at tpg.com.au> wrote:

> 

>> 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

>> 

>> -----Original Message----- 

>> From: mbcoupes-request at mbcoupes.com

>> Sent: Saturday, October 15, 2011 12:15 AM

>> 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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>> 

>> The MB Coupes Website!

>> W126 SEC Coupes

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

>> 

>> End of MBCOUPES Digest, Vol 89, Issue 15

>> ****************************************

>> 

>> 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.