[W126 Coupe] Power Steering

[Josh Allen]

I found out that with some care and ingenuity, you can replace the front 
seal without tearing down the whole pump.

When my 300sd's pump was slinging fluid from the back of the pulley, I 
ended up pulling the pulley, drilling very small holes in the seal to 
thread some screws into the metal reinforcement collar inside it, and 
then pulling it out using some different thickness material set on the 
edge to be able to rock a set of vice grip pliers on, working the seal 
out from side to side.
A careful cleaning to make sure that no filings had fallen inside and 
been left there (helped by the fact that the fluid in the reservoir was 
constantly trying to run out that way, any time it wasn't upended), was 
followed by carefully tapping the new seal into place.

That was around 15k miles ago, and no further signs of power steering 
leakage.

I know that there are seal pullers that should fit this, but the ones 
that I had available in the local area rental sources wouldn't fit.


This all being said, it's not the main way in the manual, and does 
require getting a bit messy and thinking outside the box a little.

Best of luck,
-Josh


On 8/30/2011 5:28 AM, David Zatz wrote:

> You need to have your pump rebuilt.You must  disassemble the pump to 

> replace the front seal. You can buy a rebuilt pump for  under $200- if 

> you look around. Check Parts Geek.

>

> On Mon, Aug 29, 2011 at 4:26 PM, Jim Hunress <jhuntress at bellsouth.net 

> <mailto:jhuntress at bellsouth.net>> wrote:

>

>     It is blowing out the front behind the pulley, not the high

>     pressure hose connections.

>

>     *From:*mbcoupes-bounces at mbcoupes.com

>     <mailto:mbcoupes-bounces at mbcoupes.com>

>     [mailto:mbcoupes-bounces at mbcoupes.com

>     <mailto:mbcoupes-bounces at mbcoupes.com>] *On Behalf Of *Michael Ramay

>     *Sent:* Monday, August 29, 2011 6:22 PM

>     *To:* Mercedes Coupes Mailing Lists

>     *Subject:* Re: [W126 Coupe] Sun Roof Problem

>

>     Where is blowing from? If it's in the rear of the pump, then it's

>     a DIY to replace that 2" o-ring. Otherwise, the high pressure hose

>     is generally the fault. Whatcha got??

>

>     On Mon, Aug 29, 2011 at 2:54 PM, Jim Hunress

>     <jhuntress at bellsouth.net <mailto:jhuntress at bellsouth.net>> wrote:

>

>     Quick question has anyone a power steering pump for a 87 sec for

>     sale. Mine is blowing fluid like crazy. Thanks, Jim

>

>


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