[MBZ] Monovalve insert.

2015-07-25 Thread Fred Moir via Mercedes
W123 (and BMW etc.) Monovalve insert, called a magnet in the EPC.000 835 06 
44FCP Euro $20 probably UroAutohausaz ~ $15.12  probably UroMBZ $206.40 genuine?

Fred Moir.Lynn MA.Diesel preferred.   
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Re: [MBZ] Monovalve insert

2007-01-07 Thread Tom Hargrave
The valve uses an electromagnet to drive the plunger up  down. I wonder of
the thick steel washer is needed to complete the magnetic circuit? If so
then stainless steel will not work.

Thanks,
Tom Hargrave
www.kegkits.com
256-656-1924
 

-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Glenn M. Brown
Sent: Saturday, January 06, 2007 2:43 PM
To: mercedes@okiebenz.com
Subject: [MBZ] Monovalve insert

Re:
Message: 12
Date: Fri, 5 Jan 2007 22:48:21 -0800
From: Jim Cathey [EMAIL PROTECTED]
Subject: Re: [MBZ] Monovalve insert
To: Mercedes Discussion List mercedes@okiebenz.com
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=US-ASCII; format=flowed

 Of the three washers sitting on top of the monovalve insert shaft, I 
 had lost the 1st one in '96 but all seemed to work OK with just the 
 wavy steel washer and the wide, thick washer on top.  When I recently 
 replaced the monovalve insert, I found a thin washer to place on 1st 
 and on top of this placed the wavy steel washer and a wide thick 
 stainless washer.  The top seemed to sit on flush with the monovalve 
 housing prior to installing/tightening the four screws.  Results - 
 heat only in defrost mode, all other settings heat would disppear 
 suggesting...

Remember that the monovalve is a PWM device, and needs to move back
and forth up to about once a second (or a bit slower).  If the 'wrong'
washer business screws up its mechanical response time, either due to
sapping magnetic field or due to locating the guts of the monovalve
incorrectly, you could well get a valve that doesn't work right for
PWM but can let coolant through when completely unpowered (as it is
for DEFROST).

-- Jim?xml:namespace prefix = o ns =
urn:schemas-microsoft-com:office:office /


I just got back from taking the 300D for a ride to determine if the current
washer combination on the monovalve insert would get me back to regulated
heat (Note: The 1st washer replaces the original which I lost in '96 and is
a thin one I found at Sears, the 2nd washer is the standard wavy steel
washer which comes with the monovalve repair kit, and the top washer is the
original thick, wide steel washer).  Viola, I've got regulated heat again.
The only problem here is trying to understand why.  You see, all was working
OK with only the wavy steel washer and the original thick, wide steel washer
on top prior to the crack/tear in the neoprene diaphragm of the monovalve.
Since the original thick, wide steel washer on top was somewhat corroded, I
decided to replace this with a stainless washer when I replaced the
monovalve insert, but this replacement stainless washer wasn't exactly the
same size as the original.  After installing the first thin washer, which I
found at Sears, the wavy steel washer, and the stainless replacement washer
with the new monovalve insert, I had no regulated heat on a trip from Pbgh.
to Roch. and only had heat on the defrost setting.  I've now replaced the
replacement stainless top washer with the original steel top washer which I
POR-15nd*.  This combination appears to work and there doesn't seem to be
any leaks at the housing even though the top doesn't sit flush (~1/16?) on
the housing prior to tightening the four screws.  Here's the weird part:
 Thickness (mm)   ID (in.)   OD
(in.)
Original 1st (bottom) washer?  ??
Wavy steel (middle) washer 0.45   3/4 1 1/4
Original 3rd (top) washer*2.45   5/8 1 1/2
Sears thin washer (1st repl.)1.12   5/8 1
Stainless top (repl.) washer 25/8 1
3/8
Prior to the crack/tear in the neoprene diaphragm of the previous monovalve,
the washers in place total ~ 2.9mm and I had regulated heat prior to the
neoprene diaphragm cracking/tearing.  After replacing the monovalve insert
and using a different combination of washers totaling ~ 3.57mm, I had no
regulated heat and only had heat on the defrost setting.  The current
combination of washers installed total ~ 4.02mm and regulated heat appears
to be functioning properly.  Go figure.
G. M. Brown
Rochester, NY
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Re: [MBZ] Monovalve insert

2007-01-06 Thread Jim Cathey
Of the three washers sitting on top of the monovalve insert shaft, I 
had lost the 1st one in '96 but all seemed to work OK with just the 
wavy steel washer and the wide, thick washer on top.  When I recently 
replaced the monovalve insert, I found a thin washer to place on 1st 
and on top of this placed the wavy steel washer and a wide thick 
stainless washer.  The top seemed to sit on flush with the monovalve 
housing prior to installing/tightening the four screws.  Results - 
heat only in defrost mode, all other settings heat would disppear 
suggesting...


Remember that the monovalve is a PWM device, and needs to move back
and forth up to about once a second (or a bit slower).  If the 'wrong'
washer business screws up its mechanical response time, either due to
sapping magnetic field or due to locating the guts of the monovalve
incorrectly, you could well get a valve that doesn't work right for
PWM but can let coolant through when completely unpowered (as it is
for DEFROST).

-- Jim




[MBZ] Monovalve insert

2007-01-06 Thread Glenn M. Brown
Re:
Message: 12
Date: Fri, 5 Jan 2007 22:48:21 -0800
From: Jim Cathey [EMAIL PROTECTED]
Subject: Re: [MBZ] Monovalve insert
To: Mercedes Discussion List mercedes@okiebenz.com
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=US-ASCII; format=flowed

 Of the three washers sitting on top of the monovalve insert shaft, I 
 had lost the 1st one in '96 but all seemed to work OK with just the 
 wavy steel washer and the wide, thick washer on top.  When I recently 
 replaced the monovalve insert, I found a thin washer to place on 1st 
 and on top of this placed the wavy steel washer and a wide thick 
 stainless washer.  The top seemed to sit on flush with the monovalve 
 housing prior to installing/tightening the four screws.  Results - 
 heat only in defrost mode, all other settings heat would disppear 
 suggesting...

Remember that the monovalve is a PWM device, and needs to move back
and forth up to about once a second (or a bit slower).  If the 'wrong'
washer business screws up its mechanical response time, either due to
sapping magnetic field or due to locating the guts of the monovalve
incorrectly, you could well get a valve that doesn't work right for
PWM but can let coolant through when completely unpowered (as it is
for DEFROST).

-- Jim?xml:namespace prefix = o ns = urn:schemas-microsoft-com:office:office 
/

I just got back from taking the 300D for a ride to determine if the current 
washer combination on the monovalve insert would get me back to regulated heat 
(Note: The 1st washer replaces the original which I lost in '96 and is a thin 
one I found at Sears, the 2nd washer is the standard wavy steel washer which 
comes with the monovalve repair kit, and the top washer is the original thick, 
wide steel washer).  Viola, I've got regulated heat again.  The only problem 
here is trying to understand why.  You see, all was working OK with only the 
wavy steel washer and the original thick, wide steel washer on top prior to the 
crack/tear in the neoprene diaphragm of the monovalve.  Since the original 
thick, wide steel washer on top was somewhat corroded, I decided to replace 
this with a stainless washer when I replaced the monovalve insert, but this 
replacement stainless washer wasn't exactly the same size as the original.  
After installing the first thin washer, which I found at Sears, the wavy steel 
washer, and the stainless replacement washer with the new monovalve insert, I 
had no regulated heat on a trip from Pbgh. to Roch. and only had heat on the 
defrost setting.  I've now replaced the replacement stainless top washer with 
the original steel top washer which I POR-15nd*.  This combination appears to 
work and there doesn't seem to be any leaks at the housing even though the top 
doesn't sit flush (~1/16?) on the housing prior to tightening the four screws. 
 Here's the weird part:
 Thickness (mm)   ID (in.)   OD 
(in.)
Original 1st (bottom) washer?  ??
Wavy steel (middle) washer 0.45   3/4 1 1/4
Original 3rd (top) washer*2.45   5/8 1 1/2
Sears thin washer (1st repl.)1.12   5/8 1
Stainless top (repl.) washer 25/8 1 3/8
Prior to the crack/tear in the neoprene diaphragm of the previous monovalve, 
the washers in place total ~ 2.9mm and I had regulated heat prior to the 
neoprene diaphragm cracking/tearing.  After replacing the monovalve insert and 
using a different combination of washers totaling ~ 3.57mm, I had no regulated 
heat and only had heat on the defrost setting.  The current combination of 
washers installed total ~ 4.02mm and regulated heat appears to be functioning 
properly.  Go figure.
G. M. Brown
Rochester, NY


[MBZ] Monovalve insert

2007-01-05 Thread Glenn M. Brown
Some of you may have found out about this first part some time ago.  Since the 
monovalve insert neoprene diaphragm seems to crack/tear on a regular basis of 
between 3-5 years, I contacted a representative at Robert Bosch to see if the 
neoprene parts associated with the monovalve insert are available separately . 
. . the short answer, no.
The reason I was interested in this is that I replaced the monovalve insert 
shortly after I purchased my '84 300D turbodiesel in '96, again in 2001, and I 
had to replace it again just recently.  Of the three washers sitting on top of 
the monovalve insert shaft, I had lost the 1st one in '96 but all seemed to 
work OK with just the wavy steel washer and the wide, thick washer on top.  
When I recently replaced the monovalve insert, I found a thin washer to place 
on 1st and on top of this placed the wavy steel washer and a wide thick 
stainless washer.  The top seemed to sit on flush with the monovalve housing 
prior to installing/tightening the four screws.  Results - heat only in defrost 
mode, all other settings heat would disppear suggesting 1) There was either a 
crack/tear in the new monovalve insert I installed, or 2) Something in the 
overly complex electrical part of this lousy ACC system went south.  I have 
trouble believing #2 as it would be too conincidental.  I opened up the 
monovalve again and inspected the new monovalve neoprene diaphragm I installed 
and found no cracks/tears.  I replaced the top wide thick stainless washer with 
the original wide thick steel washer and the top plate does not sit flush with 
the monovalve housing prior to tightening the four screws but, after tightening 
the four screws, there doesn't appear to be any leaks at the monovalve housing 
after starting the engine and operating the ACC on either defrost or off.  If 
this works and I've got my regulated heat back, I'll report back.  Otherwise, 
if someone out there has a clue please let me know what may have gone wrong.  
I'm hoping that one of these days I may actuallty understand this lousy system. 
 TIA.
G. M. Brown
Rochester, NY


[MBZ] Monovalve insert small washer

2006-12-04 Thread Glenn M. Brown
The monovalve insert on my '83 300D is supposed to have three washers (A small 
thin one, a wavy sping steel one in the middle, and a larger diameter thicker 
one on top).  Somewhere along the line I managed to lose the small thin washer 
and, since I'm in the process of replacing the monovalve insert for the third 
time in less than 10 years, I'm wondering if the absence of this other washer 
causes undue stress on the neoprene diaphragm and thus premature failures?  So 
if anyone out there may have an extra one of these small washers, it would be 
greatly apprecaited as I haven't been able to locate this at a specialized 
fastener place I frequent.  TIA.
G. M. Brown
Rochester, NY


Re: [MBZ] Monovalve insert

2006-12-01 Thread Jim Cathey
Does anyone out there in listland have a picture or diagram of the 
internal order of things of a monovalve in an '84 300D Turbo which 
they can send me



No, I don't.  But there _are_ three washer things.  I lost one down
between the firewalls once.  Two flat washers and the wavy spring
washer.

-- Jim




[MBZ] Monovalve insert

2006-11-30 Thread Glenn M. Brown
Does anyone out there in listland have a picture or diagram of the internal 
order of things of a monovalve in an '84 300D Turbo which they can send me 
offlist?  Since I purchased this car in '96, this is the second monovalve 
repair I've needed.  Since I haven't driven this car in the winter months until 
now, this doesn't say much for the reliability of this part.  Upon opening 
things up, there is one somewhat fat washer encompassing the monovalve insert 
shaft, a flex/spring steel washer sitting on top of this, and the core winding 
sitting on top of these.  I seem to recall that the first time I replaced this 
that there were three washers, or am I mistaken?  TIA
G. M. Brown
Rochester, NY