Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Craig via Mercedes]

On Sat, 21 Mar 2020 07:09:46 -0500 Curley McLain via Mercedes
 wrote:

> Thanks Craig,
> 
> For posterity, and for those who own OM603,2,1 engines, I added the MB 
> part number from your other email and the bolt torque.
> If you own or anticipate owning an OM 603,2,1 copy the body below and 
> save it for future reference.


I ran across more information:


http://www.peachparts.com/shopforum/diesel-discussion/312419-diy-1987-300d-serpentine-belt-tensioner-replacement.html

Sepentine Belt Tensioner, 300D 2.5 Turbo
Mercedes-Benz Genuine Factory Part
   Part Number:  606 230 00 56
 601 200 17 73
   Febi P/N: FB- 601 200 17 73

   Washer is 601 990 17 40
   The PN on the plastic block (perch) is
 601 203 03 28 2
  (yes the last 2 is cast on the part)




Craig

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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Craig via Mercedes]

On Sat, 21 Mar 2020 09:30:44 -0400 Meade Dillon via Mercedes
 wrote:

> Curly - you could also spend $30 on a clutched pulley wheel for your
> alternator, and reduce the wear and tear on the tensioner and the little
> shock absorber.

Would you happen to have a part number for that part, Max?


Craig

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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Meade Dillon via Mercedes]

Curly - you could also spend $30 on a clutched pulley wheel for your
alternator, and reduce the wear and tear on the tensioner and the little
shock absorber.
-
Max
Charleston SC
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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Jim Cathey via Mercedes]

I checked my records on the SDL, which are a bit incomplete.  In 2005:

> I put the SDL back together.  The (2) new belt tensioner bearings I
> bought were 12mm thick, to replace the (1) 30mm original bearing.
> That meant I had to come up with 6mm of spacer, which I made out of
> two 3mm thick fender washers in which I burned a bigger center hole
> with the torch.  Messy job, and I probably need to re-do it at some
> time, since it turned out a little too thick and the circlip wouldn't
> go in.  But I need a new belt anyway, and I'll tackle it again when it
> comes in.

The link:

http://formicapeak.com/~jimc/SDLlog.html#11Dec2005 


Using a ball bearing in rocking service is bad, bad, bad.  Some kind of
sleeve bearing would probably be much better.  IIRC, the original 30mm
bearing just had two ball races in a single deep housing, it wasn't a
roller bearing or anything like that, which might have survived better
in rocking service.

-- Jim

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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

Thanks Craig,

For posterity, and for those who own OM603,2,1 engines, I added the MB 
part number from your other email and the bolt torque.
If you own or anticipate owning an OM 603,2,1 copy the body below and 
save it for future reference.


You can buy generic 6004 bearings for around $1.50 each.   FAG or SKF 
are around $8 each currently.




Craig via Mercedes 
March 21, 2020 at 12:15 AM
On Fri, 20 Mar 2020 23:56:03 -0500 Curley McLain via Mercedes

I found your original email:
=
From: Curley McLain via Mercedes 
To: Mercedes_Discussion_List 
Cc: Curley McLain <126die...@gmail.com>
Reply-To: Mercedes Discussion List 
Subject: [MBZ] OM601, OM602, OM603 belt tensioner bearing info
Date: Wed, 20 Feb 2019 09:00:52 -0600
Sender: "Mercedes" 
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0)
Gecko/20100101 PostboxApp/6.1.10

The bearing is FAG 565592 (previous posting had the number wrong)

ID: 20mm
OD: 42MM
Width: 29/30

Mine measured 29.3mm

Meyle number: 014 098 0020

The problem is that none appear to be available, except a few in yurp
for something in the area of 50 euro or 50 Bp when I can buy the whole
assembly for $45 from FCP.

I took Jim's solution and ordered 2 6004-2RS FAG bearings for under $12
delivered.
            6004s are 20x42x12 so you need a 4 to 6 mm wide spacer 
between them.   I ground off a ring from the old bearing, then ground it 
flat as I could, and assembled the spacer between the bearings in the arm.


Don't forget the spacer behind the arm!

Or the whole arm is MB# 601 200 17 73

Genuine Mercedes Bolt Cover at Center Bolt of Belt Tensioner Lever
P/N: 6012020622

Torque is 74 ft-lb.


=


Craig

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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Craig via Mercedes]

On Fri, 20 Mar 2020 23:56:03 -0500 Curley McLain via Mercedes
 wrote:

> yeah, the actual bearing is 5935xx, and somewhere between 26 and 30 mm 
> wide.   It is unobtanium.   Last year I found 2 FAG 6004s on fleabay
> for cheap. THose went in the 87.  I made a center spacer from the shell
> of the old bearing.   6004s are only 12mm wide.   I was thinking the
> spacer was about 3 mm.

I found your original email:
=
From: Curley McLain via Mercedes 
To: Mercedes_Discussion_List 
Cc: Curley McLain <126die...@gmail.com>
Reply-To: Mercedes Discussion List 
Subject: [MBZ] OM601, OM602, OM603 belt tensioner bearing info
Date: Wed, 20 Feb 2019 09:00:52 -0600
Sender: "Mercedes" 
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0)
Gecko/20100101 PostboxApp/6.1.10

The bearing is FAG 565592   (previous posting had the number wrong)

ID: 20mm
OD: 42MM
Width: 29/30

Mine measured 29.3mm

Meyle number: 014 098 0020

The problem is that none appear to be available, except a few in yurp 
for something in the area of 50 euro or 50 Bp when I can buy the whole 
assembly for $45 from FCP.

I took Jim's solution and ordered 2 6004-2RS FAG bearings for under $12 
delivered.
=


Craig

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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Craig via Mercedes]

On Fri, 20 Mar 2020 20:43:24 -0500 Curley McLain via Mercedes
 wrote:

> Just got the belt tensioner arm from AZ for the 91 OM602.   If is a 606 
> part number which autohaus shows as correct for the 91.  However it
> does not have the same roller bearing in the middle as I am used to
> with the 603 in 124 and 126.   THis has a much larger hole and what
> looks like spring steel inserts over front and rear bushings, where the
> bearing should be.   It also looks deeper front to back than the 603
> arm.   It would require a much larger diameter bolt.


From my file of the things I have done:

12 Jul 2019
Done - Call AutohausAZ, 1-800-240-4620: When will order ship? They said
the tensioner will come from one of their "sister"
warehouses and may not arrive until Wednesday/Thursday
Done - Ordered from AutohausAZ:
Genuine Mercedes Bolt Cover at Center Bolt of Belt Tensioner Lever
P/N: 6012020622 $ 1.44
Febi Bilstein Belt Tensioner Lever P/N: FB-6012001773   $44.21
  Parts Total   $45.65
USPS Priority Mail  $ 9.99
  Tax   $ 0.00
Total   $55.64

The tensioner lever does come with the bearing installed.



> Anyone had the arm off a 91 or newer OM602 turbo?   Does it have the 
> bearing retained by a internal circlip?  (roller bearing about 1/8" 
> wider than 2 of ball bearings of the same od/id as the roller bearing 
> that can't be purchased separately.   I wanna say it was 2 6004
> bearings with a spacer that I used last time to avoid buying the whole
> arm.

I don't recall what the part looked like, and I did not take pictures of
the part and how it went together. Perhaps looking for the part number
listed above on AutohausAZ's website will yield a picture.

I do recall your email about the bearings and put the information in a
file here on my system, but I cannot find it now.

I already have the radiator in and the other things assembled, so I
am very hesitant to take the car apart and photograph what the part looks
like.

However, I may still have the old tensioner arm (the one which came on
the car). If I find it, I can take a picture of it and post it to the
list -- tomorrow, I need to get to bed now.


Craig

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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

yeah, the actual bearing is 5935xx, and somewhere between 26 and 30 mm 
wide.   It is unobtanium.   Last year I found 2 FAG 6004s on fleabay for 
cheap. THose went in the 87.  I made a center spacer from the shell of 
the old bearing.   6004s are only 12mm wide.   I was thinking the spacer 
was about 3 mm.


Since I found one with a good bearing, i'll use it, but will look to 
procure a couple 6004s and get the next one ready to go in.


Yes, I think a good bronze bushing may do better.  But I have no way to 
machine one and I bet you can't buy one the right size.


fleabay has some double roller bearings the right ID and OD, but 30 mm 
wide.  might work, but they are $50 to $120, so you'd be as well of to 
just buy the new arm for $70.   I think I got the 2 6004s last year for $8.



OK Don via Mercedes 
March 20, 2020 at 11:36 PM
IIRC, for the 602 and 603, it was a double wide bearing, which was
expensive and hard to find. However, someone here pointed me to using two
regular bearings - which worked fine.
However, that use of a roller bearing is one of the worst cases for them -
frequent partial rotation/ I wonder if a nice brass bushing wouldn't do
better in that location?
Is there an engineer in the house???

On Fri, Mar 20, 2020 at 11:30 PM Curley McLain via Mercedes <



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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[OK Don via Mercedes]

IIRC, for the 602 and 603, it was a double wide bearing, which was
expensive and hard to find. However, someone here pointed me to using two
regular bearings - which worked fine.
However, that use of a roller bearing is one of the worst cases for them -
frequent partial rotation/ I wonder if a nice brass bushing wouldn't do
better in that location?
Is there an engineer in the house???

On Fri, Mar 20, 2020 at 11:30 PM Curley McLain via Mercedes <
mercedes@okiebenz.com> wrote:

> Found my box of used belt tensioner arms.   I had marked on the box need
> 2x 6004 bearings.   I found one in there with a good bearing I was
> pretty sure I had salvaged from a 124 with a 606 in it.   I will put
> that one on tomorrow, then I don't have to mess with trying to find
> 6004, or wait a week to get bearings or a $70 arm.
>
> Want to do the tensioner arm, the fan clutch and change coolant all at
> once.
>
> Maybe late 606 or turbo 606 have that different tensionerarm?
>
> I found a youboob about changing the bearing, but he does not say where
> he got the bearing.  calls himself turbodieselweasel.
> https://www.youtube.com/watch?v=p1Cc7XSHZlA
> I don't need a how to change the bearing, I need a "Where the H can you
> BUY the special roller bearing for it."   FAG does not even list the
> number in their crossover catalogs.   No bearing house can find it.  MB
> does not have it.Easy enough to change, if only you could find the
> bearing.
>
> > Kaleb Striplin via Mercedes 
> > March 20, 2020 at 9:14 PM
> > That is the 606 version, it will not work on a 602.
> >
>
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>

-- 
OK Don

"Whenever you find yourself on the side of the majority, it is time to
pause and reflect." 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
2017 Subaru Legacy, 30 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

Found my box of used belt tensioner arms.   I had marked on the box need 
2x 6004 bearings.   I found one in there with a good bearing I was 
pretty sure I had salvaged from a 124 with a 606 in it.   I will put 
that one on tomorrow, then I don't have to mess with trying to find 
6004, or wait a week to get bearings or a $70 arm.


Want to do the tensioner arm, the fan clutch and change coolant all at once.

Maybe late 606 or turbo 606 have that different tensionerarm?

I found a youboob about changing the bearing, but he does not say where 
he got the bearing.  calls himself turbodieselweasel.

https://www.youtube.com/watch?v=p1Cc7XSHZlA
I don't need a how to change the bearing, I need a "Where the H can you 
BUY the special roller bearing for it."   FAG does not even list the 
number in their crossover catalogs.   No bearing house can find it.  MB 
does not have it.    Easy enough to change, if only you could find the 
bearing.



Kaleb Striplin via Mercedes 
March 20, 2020 at 9:14 PM
That is the 606 version, it will not work on a 602.



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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

crap, I can't find the bearing number.   I changed one about a year ago 
and posted the bearing number.   I think  it was 6004.  but I may be 
confusing that with the driveshaft carrier bearing.   I changed that 
about the same time.


6004 is 20x42x12mm

Carrier bearing I found is 6006-2rs   30x55x13

so it is 2 6004 I need to rebuild one of the old tensioners.   Wonder 
who has a couple for cheep?   Local would be best!




Kaleb Striplin via Mercedes 
March 20, 2020 at 9:14 PM
That is the 606 version, it will not work on a 602.



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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Buggered Benzmail via Mercedes]

I should probably have one on the shelf

--FT
Sent from iPhone

> On Mar 20, 2020, at 10:22 PM, Curley McLain via Mercedes 
>  wrote:
> 
> Ok, thanks.   Guess I'd better find the bearing number and get a couple.   I 
> have 2 old tensioners I can rebuild.   That way I don't have to wait a week 
> and pay $60-70.
> 
> Anyone need a 606 tensioner?
> 
>> Kaleb Striplin via Mercedes 
>> March 20, 2020 at 9:14 PM
>> That is the 606 version, it will not work on a 602.
>> 
> 
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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

Ok, thanks.   Guess I'd better find the bearing number and get a 
couple.   I have 2 old tensioners I can rebuild.   That way I don't have 
to wait a week and pay $60-70.


Anyone need a 606 tensioner?


Kaleb Striplin via Mercedes 
March 20, 2020 at 9:14 PM
That is the 606 version, it will not work on a 602.



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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Kaleb Striplin via Mercedes]

That is the 606 version, it will not work on a 602.

Sent from my iPhone

> On Mar 20, 2020, at 8:44 PM, Curley McLain via Mercedes 
>  wrote:
> 
> Just got the belt tensioner arm from AZ for the 91 OM602.   If is a 606 part 
> number which autohaus shows as correct for the 91.  However it does not have 
> the same roller bearing in the middle as I am used to with the 603 in 124 and 
> 126.   THis has a much larger hole and what looks like spring steel inserts 
> over front and rear bushings, where the bearing should be.   It also looks 
> deeper front to back than the 603 arm.   It would require a much larger 
> diameter bolt.
> 
> Anyone had the arm off a 91 or newer OM602 turbo?   Does it have the bearing 
> retained by a internal circlip?  (roller bearing about 1/8" wider than 2 of 
> ball bearings of the same od/id as the roller bearing that can't be purchased 
> separately.   I wanna say it was 2 6004 bearings with a spacer that I used 
> last time to avoid buying the whole arm.
> 
> I don't want to take it apart and have the car sit for a week while the right 
> arms gets here.   This would take a completely different bolt also.  Much 
> larger diameter.  I;m trying to figure out if this is just wrong, or if this 
> engine has been updated and this is the right arm.
> 
> THanks for any ideas.
> 
> 
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Re: [MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

Sort of.   What was under that big black plug?   A bearing, or a front 
and back bushing with spring steel sleeves?



Craig via Mercedes 
March 20, 2020 at 8:56 PM
On Fri, 20 Mar 2020 20:43:24 -0500 Curley McLain via Mercedes

Is the attached picture what you are looking for?


Craig



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[MBZ] Belt tensioner arm OM603, vs OM602, VS OM606

[Curley McLain via Mercedes]

Just got the belt tensioner arm from AZ for the 91 OM602.   If is a 606 
part number which autohaus shows as correct for the 91.  However it does 
not have the same roller bearing in the middle as I am used to with the 
603 in 124 and 126.   THis has a much larger hole and what looks like 
spring steel inserts over front and rear bushings, where the bearing 
should be.   It also looks deeper front to back than the 603 arm.   It 
would require a much larger diameter bolt.


Anyone had the arm off a 91 or newer OM602 turbo?   Does it have the 
bearing retained by a internal circlip?  (roller bearing about 1/8" 
wider than 2 of ball bearings of the same od/id as the roller bearing 
that can't be purchased separately.   I wanna say it was 2 6004 bearings 
with a spacer that I used last time to avoid buying the whole arm.


I don't want to take it apart and have the car sit for a week while the 
right arms gets here.   This would take a completely different bolt 
also.  Much larger diameter.  I;m trying to figure out if this is just 
wrong, or if this engine has been updated and this is the right arm.


THanks for any ideas.


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