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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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22,117 Posts
Discussion Starter #1
I have to replace the rear diff pinion seal.

WIS is calling for measuring the friction torque before taking it out.

Not even the dealer woul/could tell me the range of torque of the MB torque
measuring tool.

I can borrow one that ranges from 27 - 135nm or one that ranges from 39-200nm
Is the second one sensitive enough for that measurement or should I use the first one.
The second one is 20 miles closer so I am hoping 39nm is low enough.
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
Joined
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22,117 Posts
Discussion Starter #3
I did and did not give a range of energy measured in nm or ft lb.
 

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Outstanding Contributor
2002 ML320, 2003 A160, 2002 ML500, 2018 GLS350d
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4,405 Posts
You didn't answer my first question, but I'll answer yours.

I deleted the numbers for those who want to play at home.

BTW, torque although measured in Nm, is not the same as energy even though the dimensions seem equivalent. The relationship is: a torque of x Nm applied through 1 radian expends x joules of energy, i.e. 2πx J per revolution.
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
Joined
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22,117 Posts
Discussion Starter #5
Yes indeed that is the one. Thanks for getting the specs.

I had to have my wife use our emergency heart defibrillator after I looked at the price.
$525!!!!!
 

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Outstanding Contributor
2002 ML320, 2003 A160, 2002 ML500, 2018 GLS350d
Joined
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4,405 Posts
No worries. You know, if you want the info, just make it easier for us by quoting the WIS doc number and/or the tool number. I don't want to search through pages to find the number when you've already done it.
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
Joined
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22,117 Posts
Discussion Starter #7
I had the WIS doc # on my notebook which usually is with me, it also runs my SDS, but I had let a friend with a shop use it and kept forgetting to pick it up.

It is just 2 miles away, but with all the back to school frenzy here in the states I have been
going crazy with the publishing we do, and I have to have corporate tax return done in
15 days.
So I just kept forgetting to pick up the notebook and SDS system.
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
Joined
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22,117 Posts
Discussion Starter #8
I think I may have gotten lucky.
A local oval track race car builder says he has one sensitive enough, so I am hoping it is.

Another tech I talked to says he does them just with a digital torque wrench adapter so
it looks like there are some options.
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
Joined
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22,117 Posts
Discussion Starter #10
I wondered if I was making this more complicated than it needed to be and you showed me I am. It is a relief to know I can relax about measuring the friction torque value.

I will just index the the nut and flange with a spring loaded punch and make sure they are on the mark when putting it all back together.

It really does not seem to be a rough job. Just some patience accuracy. Slow and steady wins the race.
 
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