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Down the power steering shaft seal rabbit hole

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Old 01-10-2014 | 03:27 AM
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Default Down the power steering shaft seal rabbit hole

Installing a power steering pump in the zombie, figured I'd re-seal it just for S's & G's. Bought a reseal kit from Rennbay, take the pump apart, clean everything up. The mother in law is trying to talk at me while I'm trying to tap the new shaft seal into the housing, so of course I get it a little cockeyed and now it looks buggered:



Dumbass. (The MIL, that is....)

The seal in the Rennbay kit is a KOK PS-39040, N257C. No amount of Googling reveals a source or specs on these numbers.

Original 1989 PS pump shaft seal:


FWIW, the power steering shaft is 19 mm:




With a little internet jockeying, I think this is made by Simrit. BASL is a particular cross section:



I assume that 33.33 is the OD, 19.05 is the shaft opening, and 7.93 is the width, since that's about what this seal measures.

Bottom line is I can't find a source or a cross-reference for either of these.

Simrit's parts catalog goes from 32x19x7 to 35x19x8, skipping right over 33.33 mm OD..

Anyone got a source so I don't have the pleasure of spending $25 for a single shaft seal?
Old 01-10-2014 | 03:40 AM
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Tough to tell if the entire seal is distorted or just the dust seal.

Tap it in a tiny bit more and see if it straightens out.....
Old 01-10-2014 | 04:14 AM
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I literally just did this aswell, its $15 for the kit on pelican, and when you put the seal in, i recommend using a piece of wood or something broad and flat to tap it in, one edge likes to pop up everytime you hit the other. Incase anyone else was interested, i went off this video of a 944 pump, its exactly the same internally:
Old 01-10-2014 | 05:54 AM
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The guy on the video, doesn´t he say a 10mm wrench? At the end, the video is showing a 13mm wrench. I have checked a couple of pumps and 13mm is correct.
Åke
Old 01-10-2014 | 06:42 AM
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both, 10 mm for the pulley if you want that off, and 13 mm for the bolts holding it all together
Old 01-10-2014 | 10:52 AM
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That will teach you to talk to your MIL.
Old 01-10-2014 | 12:24 PM
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Originally Posted by Rob Edwards
...
I assume that 33.33 is the OD, 19.05 is the shaft opening, and 7.93 is the width, since that's about what this seal measures.

Bottom line is I can't find a source or a cross-reference for either of these.

Simrit's parts catalog goes from 32x19x7 to 35x19x8, skipping right over 33.33 mm OD..

Anyone got a source so I don't have the pleasure of spending $25 for a single shaft seal?
And 19.05 mm happens to be 3/4", 33.33mm happens to be 1-5/16", and just by coincidence 7.93mm happens to work out to 5/16".
So I think this might be a metric seal based on the US-metric standard of 25.4 mm...
Maybe try searching for a seal for a 3/4" shaft with a 1-5/16" OD?
Old 01-10-2014 | 12:31 PM
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ZF würde eine SAE-Wellendichtring benutzen? Ach du lieber!
Old 01-10-2014 | 12:35 PM
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Originally Posted by Rob Edwards
ZF würde eine SAE-Wellendichtring benutzen? Ach du lieber!
Nein, es ist deutlich markiert "19.05 x 33.33" -- Voilà, metric!
Old 01-10-2014 | 01:26 PM
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Okay, with that clarification,

Code:
Part Number Style Material Shalt Bore Width
BD1295-E0 TB NBR 0.750 1.311 0.311
BPP301-A0 TB ACM 0.750 1.318 0.311
AP0921-E0 TB ACM 0.750 1.318 0.311
AD0921-E1 TB NBR 0.750 1.318 0.311

So TB is the equivalent of Simrit's European BASL design. I'd guess one of these would work, probably the ones made out of NBR.

Of course, any cross-reference site leads you to an e-mail address to inquire about purchasing large lots of these.....


EDIT: BD1295-E0 cross references to SKF 7475. Will order one see how they match up.

Last edited by Rob Edwards; 01-10-2014 at 01:53 PM.
Old 01-10-2014 | 02:05 PM
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Originally Posted by Rob Edwards
Okay, with that clarification,

Code:
Part Number Style Material Shalt Bore Width
BD1295-E0 TB NBR 0.750 1.311 0.311
BPP301-A0 TB ACM 0.750 1.318 0.311
AP0921-E0 TB ACM 0.750 1.318 0.311
AD0921-E1 TB NBR 0.750 1.318 0.311

So TB is the equivalent of Simrit's European BASL design. I'd guess one of these would work, probably the ones made out of NBR.

Of course, any cross-reference site leads you to an e-mail address to inquire about purchasing large lots of these.....


EDIT: BD1295-E0 cross references to SKF 7475. Will order one see how they match up.
This might work: http://www.mscdirect.com/browse/?navid=4287920935+4288103163+4288102628&searchterm=shaft+seal, from MSC.
It's thinner, 6.35mm vs. 7.68, but the ID/OD are correct.
Just push it in with a block so the outer face is flush, with a catch-pan under
Old 01-10-2014 | 02:08 PM
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Yes, same dimensions as the SKF 7475. Its lip would run ~1.5 mm lower on the shaft than the original, that might be a good thing (?)
Old 01-10-2014 | 03:03 PM
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http://www.showmetheparts.com/BIN/do...T08_037-F2.pdf

Åke
Old 01-10-2014 | 05:09 PM
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I have the kit in stock
Old 01-10-2014 | 05:53 PM
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Heh, I geek out for 2 hours about radial seal specs and now you tell me


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