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  #1  
Old 11-14-2014, 09:49 AM
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Driveshaft Wrenches

All,

Going to be replacing my flex discs, center bearing and support, etc on the driveshaft in the next couple of weeks. I see by the write ups that I need a 41 mm and a 46 mm wrench to use on the nuts to separate the driveshaft havles.

My question is where can I purchase them reasonably priced? I don't want to spend a ton of money on two wrenches I only see myself using once in a great while.

Those of you that have done the job, did you use specific wrenches, or could I get by with some adjustable crescent wrenches or a pipe wrench?

Thanks for any advice,

Glenn

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  #2  
Old 11-14-2014, 09:54 AM
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I've seen lots of mention of using pipe wrenches on here for this particular job. Should be fine.

I chose to get the specific wrenches because I found them for about $25/ea on eBay.

I haven't done the job yet. But I do have several of these cars, so I'll use them a few time. Then, I'll keep one in the trunk of each of my cars for those kneecap kind of days
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  #3  
Old 11-14-2014, 10:45 AM
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I picked up a set from my local Harbor Freight. Was long enough ago that I don't remember the price, only that they were cheap.

were I to do it again, I'd check the Amazon price
for just the 2.
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Old 11-14-2014, 10:58 AM
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Use a large pair of CHANNEL Lock pliers, or some times referd to as Water Pump pliers. Put trans in gear to hold shaft, and then turn the 46mm nut.

This wrench has been mentioned also



Charlie
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Old 11-14-2014, 11:32 AM
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I used a Chain Type Pipe Wrench to loosen the Collar Nut and I cannot remember what I used in place of the 41mm Wrench.

When I assembled it I had bought a large US Size Combination Wrench that = 46mm at a cheapie tool store and I was supposed to cut it but never did. I managed to use it to tighten the Collar Nut. I don't think I uses anything where the 41mm Wrench would have gone as all Wheels were on the Ground and I could barely squeeze under the Car to tighten the Collar Nut.

The Collar Nut has a specific Torque but no one I read of has ever done that and it does not seem to make a difference.

A lot of issues should be covered in the below Repair Links:
Fast navigation http://www.peachparts.com/shopforum/diy-links-parts-category/146034-fast-navigation-do-yourself-links.html

DIY Links by Parts Category - PeachParts Mercedes ShopForum

PeachPartsWiki: Do It Yourself Articles - Mercedes Vehicles
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  #6  
Old 11-14-2014, 11:33 AM
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Quote:
Originally Posted by charmalu View Post
Use a large pair of CHANNEL Lock pliers, or some times referd to as Water Pump pliers. Put trans in gear to hold shaft, and then turn the 46mm nut.

This wrench has been mentioned also



Charlie

toilet pliers - also great to use to remove fuel tank strainer.
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Old 11-14-2014, 11:41 AM
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Quote:
Originally Posted by Diesel911 View Post
I used a Chain Type Pipe Wrench to loosen the Collar Nut and I cannot remember what I used in place of the 41mm Wrench.

When I assembled it I had bought a large US Size Combination Wrench that = 46mm at a cheapie tool store and I was supposed to cut it but never did. I managed to use it to tighten the Collar Nut. I don't think I uses anything where the 41mm Wrench would have gone as all Wheels were on the Ground and I could barely squeeze under the Car to tighten the Collar Nut.

The Collar Nut has a specific Torque but no one I read of has ever done that and it does not seem to make a difference.

A lot of issues should be covered in the below Repair Links:
Fast navigation http://www.peachparts.com/shopforum/diy-links-parts-category/146034-fast-navigation-do-yourself-links.html

DIY Links by Parts Category - PeachParts Mercedes ShopForum

PeachPartsWiki: Do It Yourself Articles - Mercedes Vehicles


the torque is about 20 lb/ft or something low like that. - it allows the shaft to slip on the splines while still remaining somewhat tight.
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  #8  
Old 11-14-2014, 12:10 PM
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Northern tool or harbor freight. Next time I'm using big channel locks because getting the wrenches onto the driveshaft is a pain and the thread is rather fine so it took me a while
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  #9  
Old 11-14-2014, 01:49 PM
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I used a pair of adjustable wrenches from harbor freight. I figure I can use them for dodgeball training too
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  #10  
Old 11-14-2014, 02:51 PM
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Quote:
Originally Posted by Zulfiqar View Post
the torque is about 20 lb/ft or something low like that. - it allows the shaft to slip on the splines while still remaining somewhat tight.
Thanks I have the Service Manual. However, what did you Torque it with?

After I rolled the Car back and forth to center it I could barely fit under the Car to tighten it with a regular Wrench. Not sure I could have fit under with a Torque Wrench.

I shopped for a Crows Foot type Wrench but never found one sold singly that was cheap. I ended up buying a short US sized wrench that fits when the price was good on eBay but since then I have not needed to remove the Drive Shaft.

The slip brings up another issue; the need to be sure the Shaft is greased.
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  #11  
Old 11-14-2014, 03:47 PM
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One option for large wrenches is a stubby "knock wrench". Search for that on ebay. It has a pad you hit with a hammer. Especially good in tight spaces. We used one at a former company to take the top off a large valve, w/ one guy standing on top swinging a sledgehammer like a golf club to hit the big knock wrench. I have only seen as a box wrench, so might need to cut a slot to get it over the shaft.
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  #12  
Old 11-14-2014, 07:09 PM
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41 MM + 46MM Propeller Shaft nut crowsfoot wrenches

SEE:

http://www.peachparts.com/shopforum/diesel-discussion/308674-tool-question-2.html
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  #13  
Old 11-15-2014, 06:13 AM
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I just did the job I used one pipe wrench and locked the shaft by putting a bar in the u-joint. The nut is not really that tight because it is supposed to be able to move on the spline yet. Make sure you have some grease on the spline when putting back together.
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  #14  
Old 11-15-2014, 10:43 AM
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What I don't understand is all the fuss to tighten the nut with the suspension loaded, when the spline is supposed to be able slide anyway.
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  #15  
Old 11-15-2014, 11:06 AM
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Quote:
Originally Posted by Carpenterman View Post
What I don't understand is all the fuss to tighten the nut with the suspension loaded, when the spline is supposed to be able slide anyway.
It makes sense if you are not using the Proper Torque and the majority of the People are not Torquing.

Also is that sliding something you read in the Service Manual or an observation?

Torque Chart Looks like 22-29.5 foot-pounds
Attached Thumbnails
Driveshaft Wrenches-drive-shaft-clamping-nut-torque.jpg  

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Last edited by Diesel911; 11-15-2014 at 11:21 AM.
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