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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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Discussion Starter #1
Uuffffff.

It REALLY ticks me off when companies are so greedy that they forget about the customer....

Case in point:

My wife's W140 developed a TINY leak in the Front Shaft Seal of the Power Steering pump. Since it drives me NUTS to have orange PS fluid on my nice white floors, I decided to finally deal with it....

So, lets look in the EPC to find a repair/seal kit... NONE!!

Ok, says I, thinking I'm sooo smart, I will track down the manufacturer (ZF Pumps) in Germany..... and write them.... "Oh, no, we don't sell seal kits... you have to purchase a WHOLE NEW PUMP!!!"

What sort of idiot company builds pumps but NO seals to service it??!!

Hmmmm, this means war.... After numerous routes, I FINALLY track down a BMW part number for a "similar" pump.. yada yada ya......

I finally found a company who makes a seal kit for $12 Bucks!!! Ha!! I win the war MB/ZF!!! No need to buy your silly $500 Pump, all for a stupid $1 front seal!!

Anyway, here is a Step-by-Step on how to do your own repair.

Here's the how to for V-Belt R/R:
http://www.benzworld.org/forums/w140-s-class/1436736-photo-diy-v-belt-change.html
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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3,093 Posts
Discussion Starter #2
part 2
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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3,093 Posts
Discussion Starter #3
part 3
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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Discussion Starter #4
part 4
 

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1996 Mercedes-Benz S 600 L (W140)
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1,272 Posts
Loveley work man :)
Keep up :)
 

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'07 CLK350
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1,144 Posts
Another amazing G-AMG Photo DIY! Man, I wish I had your garage!
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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3,093 Posts
Discussion Starter #10
Where did you get the seal kit from?
..::importec::.. Wholesale Mercedes Parts : BMW Parts : Volvo Parts ...

$12 bucks!

In RETROSPECT, I just noticed the part# on the package.... the 000 460 47 80 and it *IS* a MB number as well...

I now ran it through the EPC and it comes out as a "good" part#, but NOT APPLICABLE to my particular P/S pump.

The above number kit had a few "extra" gaskets which did not apply to my pump, but what the hey.... the gaskets I *DID* need were in there...
 

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1994 Benz S320 SWB / 1986 Porsche 911 Targa / 1998 Benz CL 500
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1,290 Posts
W o W! Nice Job:thumbsup:

I wonder if there is a DIY or a REMEDY for the steering pump noise. For the last 2 years every damn winter when I turn the steering wheel to leave the garage I hear a whistle like sound coming from the pump and every summer it dissapears, whats the deal with seasonal temperature changes I still dont know though and even though its pretty chilly allready no noise coming from the pump this year, weird.:confused:
 

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Nice pictorial steps! I may need to do this myself, I have a '97 S420 with a leak somewhere on the pump, not sure, buy I do see a fluid build-up under pump and behind reservoir. Where did you purchase your specialty tools? Would Northern Tools or Harbor Freight carry them?

Luke
 

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'07 CLK350
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1,144 Posts
G-AMG, I replaced my PS pump yesterday using your procedure, Things on my '97 were slightly different, so I thought I'd share.

The back side bolts on mine were 13mm hex instead of E12.

You are correct, that second bold it a major pain to get at! It actually took me longer to get this one bolt out and in than the entire rest of the job! I actually was not able to get at it from under the car since I didn't have extensions long enough to reach in all the way from the pittman arm. I was able to access it from the top by reaching in there with my left hand and working my way around kind of backwards. Obviously, I wasn't able to get a torque wrench on that bolt, so I'm going to ask the mechanic to torque it for me next time I have the car in for service.

If you don't have the counter stay, leave the belt on when you break torque on the three pulley bolts. The belt provides enough friction to hold the pulley in place. The same goes for re-torquing them. Put the bolts on and snug them up, install the belt, and then torque.

For everyone else, G-AMG's pictures don't really show it in too much detail, but the pump is on a mounting bracket as well. If you look at the pictures showing the 6mm Inhex bolt you can see it. That bolt is on the bracket and not the pump itself. The bracket is connected to the pump with two 13mm hex bolts on the front and two 6mm hex bolts at the back.

Thanks again for the great write-up, G-AMG! :thumbsup:
 

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72 300SEL 4.5 92 500 SEL 86 300 SE 90 230 CE
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20 Posts
Great work!!

Great work!!

I thank you very much. It will be very helpful.​
 

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W124 E280, R129 SL500, BMW 525i E34
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288 Posts
Very good info, my steering wheel is difficult to roll back after make a U-turn(have to pull it back for a bit )

I may need to follow your instruction when that day comes
 

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97 SL 500R, 10 E350 Sedan
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7 Posts
Great tutorial. Removing all of the dust shields below the engine on the left side (fender liner, etc.) make accessing the lower bolt on the back much easier. I did not rebuild my pump. Instead, I replaced it with a rebuilt one that I bought from Autopartswarehouse.com. They had the best price on the ZF pump and it arrived the next day after ordering it. No shipping and no sales tax. $363.95 including $50 for the core return. Of course, rebuilding it yourself will save you significantly. I am a good mechanic but did not want to take the chance of not doing it right.
 

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'04 G55 '80 280GE '99 S420 '98 E320 2011 E350 2016 GLA250
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Discussion Starter #20
I am a good mechanic but did not want to take the chance of not doing it right.

Ohhh, come-on now... where's your sense of adventure?? If I (the Mechanical Temple Monkey) can do it... anybody can.

What's the worst thing which will happen, "It Leaks Again???!"

Anyhooo, you have a nice fancy new one, so enjoy the (smooth steering) Ride...

Cheers,
G
 
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