Re: [MBZ] '87 30TD rev counter.

2015-07-15 Thread Jim Cathey via Mercedes

my new sensor did not fix the flaky KLIMA belt-saving feature)


Is its feature-ness less quotable if it's correctly
described as an engine-saver, rather than a belt-saver?

This feature not only saved the belt, and thus perhaps
the engine on the 190D when the compressor seized, but it
saved the compressor too!  I disassembled it and burnished
the minor scoring, lubed and reassembled, and that compressor
has worked just fine thereafter.

-- Jim


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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread Curly McLain via Mercedes

Hmmm  Did you mean to say something?





OK Don

NSA: The only branch of government that actually listens to US citizens!

*Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
our people need it sorely on these accounts.* - Mark Twain

There are three kinds of men: The ones that learns by reading. The few who
learn by observation. The rest of them have to pee on the electric fence
for themselves.

WILL ROGERS, *The Manly Wisdom of Will Rogers*
2013 F150, 18 mpg
2012 Passat TDI DSG, 44 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread OK Don via Mercedes
Well, yes. Where did it go?
This sounds like a flaky ground, probably in the instrument cluster.
That's what I meant to say . . .

On Tue, Jul 14, 2015 at 2:20 PM, Curly McLain via Mercedes 
mercedes@okiebenz.com wrote:

 Hmmm  Did you mean to say something?




-- 
OK Don

NSA: The only branch of government that actually listens to US citizens!

*“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
our people need it sorely on these accounts.”* – Mark Twain

There are three kinds of men: The ones that learns by reading. The few who
learn by observation. The rest of them have to pee on the electric fence
for themselves.

WILL ROGERS, *The Manly Wisdom of Will Rogers*
2013 F150, 18 mpg
2012 Passat TDI DSG, 44 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread Curly McLain via Mercedes

My ground is flaky or someone else's?


your ground has cat poop, your view is flaky

(Sorry, couldn't resist)

All in good fun

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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread Andrew Strasfogel via Mercedes
So do I have to R/R the cluster to fix the poopy ground?

On Tue, Jul 14, 2015 at 3:54 PM, Curly McLain via Mercedes 
mercedes@okiebenz.com wrote:

 My ground is flaky or someone else's?


 your ground has cat poop, your view is flaky

 (Sorry, couldn't resist)

 All in good fun


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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread Andrew Strasfogel via Mercedes
My ground is flaky or someone else's?

On Tue, Jul 14, 2015 at 3:35 PM, OK Don via Mercedes mercedes@okiebenz.com
wrote:

 Well, yes. Where did it go?
 This sounds like a flaky ground, probably in the instrument cluster.
 That's what I meant to say . . .

 On Tue, Jul 14, 2015 at 2:20 PM, Curly McLain via Mercedes 
 mercedes@okiebenz.com wrote:

  Hmmm  Did you mean to say something?
 
 


 --
 OK Don

 NSA: The only branch of government that actually listens to US citizens!

 *“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of
 our people need it sorely on these accounts.”* – Mark Twain

 There are three kinds of men: The ones that learns by reading. The few who
 learn by observation. The rest of them have to pee on the electric fence
 for themselves.

 WILL ROGERS, *The Manly Wisdom of Will Rogers*
 2013 F150, 18 mpg
 2012 Passat TDI DSG, 44 mpg
 1957 C182A, 12 mpg - but at 150 mph!
 ___
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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread Andrew Strasfogel via Mercedes
The 85 is fine.  Of course I know the difference

On Tue, Jul 14, 2015 at 8:01 PM, fmiser via Mercedes mercedes@okiebenz.com
wrote:

  Andrew wrote:
 
  My W123 tach is also going wacky - acts the same even when
  I swap the under-hood sensor.  Oscillates, goes to zero,
  generally misbehaves.  Used to work great so I am thinking
  it has to be the sensor and NOT the PU unit that screws
  into the tach chassis housing.  Maybe I should just swap
  out the cluster gauge for one of my many spare used units?


 used to work great doesn't exonerate any of the components.

 Just a reminder, the tachometer system on a '85 is different
 than all the other years of W123s.

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Re: [MBZ] '87 30TD rev counter.

2015-07-14 Thread fmiser via Mercedes
 Andrew wrote:
 
 My W123 tach is also going wacky - acts the same even when
 I swap the under-hood sensor.  Oscillates, goes to zero,
 generally misbehaves.  Used to work great so I am thinking
 it has to be the sensor and NOT the PU unit that screws
 into the tach chassis housing.  Maybe I should just swap
 out the cluster gauge for one of my many spare used units?


used to work great doesn't exonerate any of the components.

Just a reminder, the tachometer system on a '85 is different
than all the other years of W123s.

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Re: [MBZ] '87 30TD rev counter.

2015-07-13 Thread Fred Moir via Mercedes
Alles.There appears to be a long thin-ish wire from drivers to pass. side right 
behind the engine with what looks like a taped-up trio of butt connectors in 
line.Spelunking begin!
Thanks for all of the info and helpful suggestions, you guys are great!
Fred Moir.Lynn MA.Diesel preferred.

 Date: Mon, 13 Jul 2015 08:43:40 -0400
 To: mercedes@okiebenz.com
 Subject: Re: [MBZ] '87 30TD rev counter.
 From: mercedes@okiebenz.com
 CC: dillonm...@gmail.com
 
 Fred,
 
 The two pin connector for the tachometer sensor is, as Peter said, behind 
 engine.  I'm pretty sure it is passenger side, between battery and 
 HVAC/windshield wiper box.  If you follow wire from sensor, should be about 
 three feet to get to the connector.  Sensor is driver side, near starter.  
 You'll probably need to remove the air/water ducting and rubber seals on the 
 top of the firewall.
 -- 
 Max Dillon
 Charleston SC
 '87 300TD
 '95 E300
  
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Re: [MBZ] '87 30TD rev counter.

2015-07-13 Thread Curly McLain via Mercedes
Sounds like someone hacked it or the connector caused problems 
before.  sounds like cutting out and replacing the butt connectors is 
the place to begin.


I like filling shrink tubing with clear silicone seal over the 
connector, then shrink the tubing to make a watertight (hopefully) 
repair.  That is how I rig trailer lights.  Never had any trouble 
related to connectors with that method.  I used to solder all the 
wire joints on trailers.


Alles.There appears to be a long thin-ish wire from drivers to pass. 
side right behind the engine with what looks like a taped-up trio of 
butt connectors in line.Spelunking begin!

Thanks for all of the info and helpful suggestions, you guys are great!
Fred Moir.Lynn MA.Diesel preferred.


 Date: Mon, 13 Jul 2015 08:43:40 -0400
 To: mercedes@okiebenz.com
 Subject: Re: [MBZ] '87 30TD rev counter.
 From: mercedes@okiebenz.com
 CC: dillonm...@gmail.com

 Fred,

 The two pin connector for the tachometer sensor is, as Peter said, 
behind engine.  I'm pretty sure it is passenger side, between 
battery and HVAC/windshield wiper box.  If you follow wire from 
sensor, should be about three feet to get to the connector.  Sensor 
is driver side, near starter.  You'll probably need to remove the 
air/water ducting and rubber seals on the top of the firewall.

 --
 Max Dillon
 Charleston SC
 '87 300TD
 '95 E300
 			  		 
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Re: [MBZ] '87 30TD rev counter.

2015-07-13 Thread Scott Ritchey via Mercedes
If you have a marine (boating) store handy, Ancor makes heat-shrink crimp
connectors that include a heat-activated sealant.  They are pricey but very
effective.  Probably no more effective than Curley's silicone but easier to
use and they store indefinitely.  Great for harsh environments, like a wet
bilge.

 -Original Message-
 From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of
 Curly McLain via Mercedes
 Sent: Monday, July 13, 2015 10:36 AM
 To: Mercedes Discussion List
 Cc: Curly McLain
 Subject: Re: [MBZ] '87 30TD rev counter.
 
 Sounds like someone hacked it or the connector caused problems before.
 sounds like cutting out and replacing the butt connectors is the place to
begin.
 
 I like filling shrink tubing with clear silicone seal over the connector,
then
 shrink the tubing to make a watertight (hopefully) repair.  That is how I
rig
 trailer lights.  Never had any trouble related to connectors with that
method.  I
 used to solder all the wire joints on trailers.
 
 Alles.There appears to be a long thin-ish wire from drivers to pass.
 side right behind the engine with what looks like a taped-up trio of
 butt connectors in line.Spelunking begin!
 Thanks for all of the info and helpful suggestions, you guys are great!
 Fred Moir.Lynn MA.Diesel preferred.
 
   Date: Mon, 13 Jul 2015 08:43:40 -0400
   To: mercedes@okiebenz.com
   Subject: Re: [MBZ] '87 30TD rev counter.
   From: mercedes@okiebenz.com
   CC: dillonm...@gmail.com
 
   Fred,
 
   The two pin connector for the tachometer sensor is, as Peter said,
 behind engine.  I'm pretty sure it is passenger side, between battery
 and HVAC/windshield wiper box.  If you follow wire from sensor, should
 be about three feet to get to the connector.  Sensor is driver side,
 near starter.  You'll probably need to remove the air/water ducting
 and rubber seals on the top of the firewall.
   --
   Max Dillon
   Charleston SC
   '87 300TD
   '95 E300
 
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Re: [MBZ] '87 30TD rev counter.

2015-07-13 Thread Fred Moir via Mercedes
Curly, et all.I'm not a fan of standard butt connectors, they are unsealed and 
prone to holding moisture thus causing hidden corrosion.The heat sealable butt 
connectors seem to work well, may try to use some or not depending on what I 
find.Gee, it's dark and dirty in here.TTFN.

Fred Moir.Lynn MA.Diesel preferred.

 Date: Mon, 13 Jul 2015 09:35:49 -0500
 To: mercedes@okiebenz.com
 Subject: Re: [MBZ] '87 30TD rev counter.
 From: mercedes@okiebenz.com
 CC: 126die...@gmail.com
 
 Sounds like someone hacked it or the connector caused problems 
 before.  sounds like cutting out and replacing the butt connectors is 
 the place to begin.
 
 I like filling shrink tubing with clear silicone seal over the 
 connector, then shrink the tubing to make a watertight (hopefully) 
 repair.  That is how I rig trailer lights.  Never had any trouble 
 related to connectors with that method.  I used to solder all the 
 wire joints on trailers.
  
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Re: [MBZ] '87 30TD rev counter.

2015-07-13 Thread Max Dillon via Mercedes
Fred,

Check the price for a new sensor, I think I paid about $30 for MB real deal, 
but that was ten years ago.  They rarely go bad (my new sensor did not fix the 
flaky KLIMA belt-saving feature) so junk yard source should also be viable.  
Nothing special about the sensor, probably used in gasser models too.
-- 
Max Dillon
Charleston SC
'87 300TD
'95 E300
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Re: [MBZ] '87 30TD rev counter.

2015-07-13 Thread Max Dillon via Mercedes
Fred,

The two pin connector for the tachometer sensor is, as Peter said, behind 
engine.  I'm pretty sure it is passenger side, between battery and 
HVAC/windshield wiper box.  If you follow wire from sensor, should be about 
three feet to get to the connector.  Sensor is driver side, near starter.  
You'll probably need to remove the air/water ducting and rubber seals on the 
top of the firewall.
-- 
Max Dillon
Charleston SC
'87 300TD
'95 E300

On July 11, 2015 9:07:00 PM EDT, Fred Moir via Mercedes mercedes@okiebenz.com 
wrote:
Dan.Thanks for the reply.I'm looking for the point at which the various
consumers of tach. info diverge.Trying to cut the problem into smaller
parts.Fred

Fred Moir.Lynn MA.Diesel preferred.



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Re: [MBZ] '87 30TD rev counter.

2015-07-12 Thread Peter Frederick via Mercedes
No, that one is for diagnostics, specifically setting the injection  
timing with the dynamic tool.


The one for the idle speed/tach is on the rear of the engine reading  
off the flywheel.


Peter

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Re: [MBZ] '87 30TD rev counter.

2015-07-12 Thread Curly McLain via Mercedes
Ok, thanks.  Is the Hall effect sensor for the OM603 located on the 
front  of the engine with the magnet on crankshaft damper as on the 
OM617/616?




The connector that attaches the tail from the sensor to the harness.  
It's exposed and corrodes, resulting in poor transmission of the 
signal (which is not voltage, but a pulse generated by the Hall 
Effect pickup).  The result is first an erratic tachometer/idle 
speed control, followed by eventual loss of signal to the amplifier.


Peter


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Re: [MBZ] '87 30TD rev counter.

2015-07-12 Thread Curly McLain via Mercedes
Are you talking about the engine to body ground strap, or a different 
connector?




The connector behind the engine is usually the one that gets corroded.

Mine comes and goes, along with the idle speed control, and I 
suppose I should get in there and clean that connector sometime.


Peter


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Re: [MBZ] '87 30TD rev counter.

2015-07-12 Thread Peter Frederick via Mercedes

The connector behind the engine is usually the one that gets corroded.

Mine comes and goes, along with the idle speed control, and I suppose  
I should get in there and clean that connector sometime.


Peter

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Re: [MBZ] '87 30TD rev counter.

2015-07-12 Thread Peter Frederick via Mercedes
The connector that attaches the tail from the sensor to the harness.   
It's exposed and corrodes, resulting in poor transmission of the  
signal (which is not voltage, but a pulse generated by the Hall Effect  
pickup).  The result is first an erratic tachometer/idle speed  
control, followed by eventual loss of signal to the amplifier.


Peter

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Re: [MBZ] '87 30TD rev counter.

2015-07-11 Thread Fred Moir via Mercedes
Dan.Thanks for the reply.I'm looking for the point at which the various 
consumers of tach. info diverge.Trying to cut the problem into smaller 
parts.Fred

Fred Moir.Lynn MA.Diesel preferred.

 Date: Sat, 11 Jul 2015 19:26:27 -0400
 To: mercedes@okiebenz.com
 Subject: Re: [MBZ] '87 30TD rev counter.
 From: mercedes@okiebenz.com
 CC: d...@penoff.com
 
 Don’t know about 87s, but earlier models had issues with electrolytic caps in 
 the tach that dried out.
 
 Have you popped the cluster and taken a look around?
 
 Dan
 
 
  On Jul 11, 2015, at 7:17 PM, Fred Moir via Mercedes mercedes@okiebenz.com 
  wrote:
  
  Calling all genii.My 1987 300TD had an intermittent rev counter(Tachometer) 
  that has since died.The signal would cut in and out making the car lurch at 
  idle, ~500 rpm to 650 rpm.The signal pickup has 4.5 ac volts at idle and 
  climbs when the throttle is increased.The OVP relay has been substituted 
  with a known good and a new one, no change.Swapped the KLIMA for a known 
  good one, no change. The ECU computer was also tried with a replacement, 
  again, no change, still dead.As the intermittent signal supplies both the 
  instrument and the Idle speed control, I can only assume that the signal is 
  going missing before the common point.Any one have any ideas as to where to 
  look for bad connection/broken wire/gremlins/vegas (?) ?Fred.
  
  Fred Moir.Lynn MA.Diesel preferred. 

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Re: [MBZ] '87 30TD rev counter.

2015-07-11 Thread Dan Penoff via Mercedes
Don’t know about 87s, but earlier models had issues with electrolytic caps in 
the tach that dried out.

Have you popped the cluster and taken a look around?

Dan


 On Jul 11, 2015, at 7:17 PM, Fred Moir via Mercedes mercedes@okiebenz.com 
 wrote:
 
 Calling all genii.My 1987 300TD had an intermittent rev counter(Tachometer) 
 that has since died.The signal would cut in and out making the car lurch at 
 idle, ~500 rpm to 650 rpm.The signal pickup has 4.5 ac volts at idle and 
 climbs when the throttle is increased.The OVP relay has been substituted with 
 a known good and a new one, no change.Swapped the KLIMA for a known good one, 
 no change. The ECU computer was also tried with a replacement, again, no 
 change, still dead.As the intermittent signal supplies both the instrument 
 and the Idle speed control, I can only assume that the signal is going 
 missing before the common point.Any one have any ideas as to where to look 
 for bad connection/broken wire/gremlins/vegas (?) ?Fred.
 
 Fred Moir.Lynn MA.Diesel preferred. 
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