Photo DI'M'- P/S Pump Overhaul IN SITU Method a la llast993 - Mercedes-Benz Forum
 
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post #1 of 3 (permalink) Old 04-15-2012, 01:57 PM Thread Starter
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Photo DI'M'- P/S Pump Overhaul IN SITU Method a la llast993

I owe a Huge thank you and shout-out to SDHOW, for so aptly pointing out my tiny "Oooops" on my original Powersteering Pump overhaul. I had placed the Impeller Base in UPSIDE DOWN, so there was a "Beveled" edge up against the Circlip, rather than the FLAT edge.

Actually, it was a blessing in disguise.... the Previous Overhaul set (non-OEM), was already showing some signs of rubber break-down, so I am very thankful I purchased a OEM M-B Overhaul set.


This post is dedicated to llast993, who so cleverly "invented" this Non-WIS version of Pump Overhaul.


As always, this is "For Entertainment Value ONLY", and is not intended to be used a repair guide.

G
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post #2 of 3 (permalink) Old 04-15-2012, 02:00 PM Thread Starter
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part 2
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post #3 of 3 (permalink) Old 06-15-2019, 04:10 PM
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Power steering pump seals - additional items FYI

Just did my old '98 S420 - THANKS to all for the info, really appreciate it! First, an important add. It says, urgently, right after your repairs to turn the steering wheel all the way left then all the way right 30 times (!) BEFORE starting the engine to avoid air bubbles into the rack & system. I did, no issues. Secondly, I broke the circlip getting it off and any spare part of this DOES NOT EXIST. For W140's you will have to find 90's MB's or BMW's with (in my case) ZF pumps and get the circlip out of one of those (I did, at a junkyard). It's a shame to disassemble a pump just for this clip, but it is non-stock clip size. Otherwise, you'll have to buy a reman'd unit. Finally, I bent the circlip getting that one off, I think you need to use 3 small screwdrivers to first get it in the back across from the gap, then work it both sides forward from that. Trying to pull it off the back opens it up too much coming off the shaft.
I searched EVERYWHERE for a circlip, it MAY be available in a BMW rebuild kit in which they include the circlip with the new seals. I ordered it but it hasn't come in and I'll not accept it now, but maybe I'll go look just to verify it exists that way ($40-50 for their kit!). Thank you.
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