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  #1  
Old 08-23-2013, 08:27 PM
Pooka
 
Join Date: Sep 2005
Posts: 664
Removing a P/S pump from a 1966 230S...

I have been asked by a friend to replace the power steering unit on a 1966 230S. Sounds easy enough, but it is about 400 remote miles away and I have never done this.

I have all the tools I think are necessary, but if I need something it would be a two hour drive to a town that might have what I need and a six hour drive to a town that would for sure have what I need.

So... Anyone know just what tools are needed? And is there a special pulley puller I need to take? Must the pulley be removed to remove the power steering unit? This looks like an easy thing to do, but the oldest Mercedes I normally get close to would be a 109. And this pump mounts on the engine; there is no air pump in front of it like the air suspension cars have.

I think it would be difficult to find a tool needed that I don't own, but just in case.... Any advice is welcome.

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  #2  
Old 08-24-2013, 10:13 AM
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Join Date: Dec 2009
Location: Northwest Ohio
Posts: 605
Standard sockets and wrenches will remove the pump. The problem will be removing the pulley.

Mercedes makes a special puller, but I used heat from a torch, a vise, and a wooden mallet to knock it off. I was replacing the seals so I wasn't worried about any heat damage. The shaft should have a taper and a key/keyway.

You don't have to get it red hot, but a certain temperature will mess with the seal. If you can't get the special tool, you might want to buy a seal kit (pretty cheap) to have on hand. Might not be a bad idea to replace it anyway while you're in there.

You might want to check ahead of time that you are replacing pump for pump. Some of those engines had a remote reservoir, if I'm not mistaken.
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1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"
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  #3  
Old 08-24-2013, 10:53 PM
Pooka
 
Join Date: Sep 2005
Posts: 664
Thanks.

I might be able to pull the pulley off in their shop (they are farmers and have a nice set of tools for fixing farm equipment) but do I need the pulley off in order to remove the pump? I cannot tell from looking at the photos I have been able to find.

And you are correct about the remote tank. This has one.

I tried asking them and they were scared to even venture a guess since they are new to this Mercedes stuff.
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  #4  
Old 08-25-2013, 05:25 PM
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Join Date: Dec 2009
Location: Northwest Ohio
Posts: 605
No, you don't need to remove the pulley unless the replacement pump doesn't have one. Or if you want to replace the seal.
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1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"
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  #5  
Old 08-25-2013, 07:27 PM
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Join Date: Apr 2009
Location: Los Angeles (Altadena)
Posts: 1,782
Quote:
Originally Posted by Carpenterman View Post
No, you don't need to remove the pulley unless the replacement pump doesn't have one. Or if you want to replace the seal.
I disagree. On my car you need to remove the pulley in order to get to one of the bolts that holds the pump in. I was able to borrow the tool from my local Mercedes mechanic and then it took no time at all. If you use a mallet and bend the pulley trying to remove it you are screwed. Of course I may be all wrong since I was removing it from an M130 engine rather than the engine you have...
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  #6  
Old 08-25-2013, 11:12 PM
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Join Date: Dec 2009
Location: Northwest Ohio
Posts: 605
As I recall, I removed the entire bracket, then separated the pump from the bracket on the bench.

Yea, if you can get the special tool, you can remove the pulley on the car. If not, you are left with the knockoff method and if you are careful, will not cause any damage.
__________________
1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"
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  #7  
Old 08-25-2013, 11:41 PM
Pooka
 
Join Date: Sep 2005
Posts: 664
Thanks so much. I will report back in a few days on how all of this went.

This is a rather arcane sort of thing, but this thread will live for years and years and I cannot be the last person to ever need to replace a P/S pump on a W111 or W110.

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