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Unread 09-29-2008, 05:09 PM   #1
Jeeps4u
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Sanden 709T AC Clutch Bearing Question!!

Hey Guys,
Man O' Man! So my bearing in my AC clutch assembly is going.

1997 XJ Sport 4.0
Sanden 709T AC Compressor (Model # U 4691)

I was going to just replace the bearing, but it appears that the bearing is fixed in place by the tabs?? My machine shop said they didn't think it could be removed without breaking the little tiny friggin tabs off. Can this bearing be removed and replaced?

I picked up a used compressor from a 2001 XJ ($85 salvage yard) thinking I could swap the pulley w/ bearing and/or clutch assembly. Turns out the 2001 compressor (Sanden 709T A01 - Model # 4826) pulley is recessed, the coil is a different size and the clutch assembly won't fit properly onto my compressor.

I am really, really trying to avoid pulling the whole compressor! Can my bearing be replaced?

Thanks for any pointers! -Aaron- Madison, WI

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97' XJ Sport-4.0L I6, Forest Green, full-faced brushguard, (6) spotbeam headlights, 3" Rough Country w/ 3.5" Pro Comp packs, newly added magnaflow cat and dyno muffler
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Unread 09-29-2008, 06:32 PM   #2
Ed Rico
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The short answer is yes, the clutch pulley bearing can be replaced. As you've noted, the bearing is staked in from the compressor side to hold it in place in the pulley. On my '98 with that same Sanden compressor, I used a rotary file in an angle grinder to (carefully) remove the metal from the pulley where it was staked, after that it was straightforward to drive the bearing out through the back of the pulley. Once the new bearing is in place in the pulley (stick it in the freezer for awhile first), just use a hammer and chisel in several places around the perimeter of the bearing to restake it and hold it in place and you're ready to reinstall back onto the compressor snout.

That bearing was pretty expensive for a ball bearing. Don't bother trying to source one from a parts store, Autozone has 2 bearings listed that are both wrong and when I found the correct one at another store it listed for $90 or so. I ending up using the NSK p/n on the bearing to locate a new one from Motion Industries, the local NSK distributor here in Chicago. Was around $70, if I remember. Best part of all is that you never have to open the system to make the repair.

-Ed Rico
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Unread 09-29-2008, 08:18 PM   #3
Jeeps4u
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Ed, thank you so much for the info. That is exactly the first hand advise I was looking to hear.

Has anyone else done this method of replacing the bearing?
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Unread 09-30-2008, 04:19 AM   #4
davet1960
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yes, i had to order the bearing from Japan
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Unread 12-12-2008, 01:19 PM   #5
Jeeps4u
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I know it's been a while, but I just wanted to update this thread and help anyone that has this same dilemma. I replaced my a/c clutch bearing (from used compressor $90) by cutting out the old crap bearing and the new bearing using a dremel tool and various cutting bits. Then pounded the new one into my existing pulley wheel. So yeah, if your bearing goes, find a new one, cut the tabs off the pulley to free the bearing and you saved $150 or more by not having to buy the whole clutch assembly. Thanks for the tips guys!!
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Unread 04-14-2009, 05:40 PM   #6
eazy
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what are the benefits from putting the new bearing into the freezer ?
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Unread 04-14-2009, 06:52 PM   #7
Ed Rico
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Chilling the bearing shrinks it (very) slightly and makes it a bit easier to install in the bore of the pulley.

-Ed Rico
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Unread 06-03-2009, 07:18 PM   #8
gnfoster
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What if I don't have the part NSK number?

My bearing was completely destroyed. Does anyone still have the NSK part number of the bearing we're talking about? Can they maybe find it by description at Motion?

Thanks for any help!
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Unread 06-06-2009, 08:46 AM   #9
Ed Rico
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Mine was an NSK 35BD219DUK. Dimensions are 55mm OD 35mm ID 20mm thick.

You should be able to cross-reference that into other bearing manufacturer's part numbers if you have to find a different supplier.

-Ed Rico
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Unread 06-08-2009, 04:43 PM   #10
dickmgl
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AC Compressor Clutch

I am replacing the clutch bearing on my AC compressor for '99 Jeep Cherokee Sport. How do I get the clutch off? The compressor is a Sanden #4691
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Unread 06-08-2009, 05:19 PM   #11
AZ Jeff
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Quote:
Originally Posted by dickmgl View Post
I am replacing the clutch bearing on my AC compressor for '99 Jeep Cherokee Sport. How do I get the clutch off? The compressor is a Sanden #4691
Go here to download the manual on how to service the Sanden compressor: http://www.sanden.com/index.php?id=MTExOTk3OTEwNw6
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Unread 06-11-2009, 08:17 PM   #12
multmigs
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what is the symptom of the bearing going bad?
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Unread 06-11-2009, 09:05 PM   #13
AZ Jeff
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Quote:
Originally Posted by multmigs View Post
what is the symptom of the bearing going bad?
With the belt off the compressor, turning the pulley by hand will reveal noise and/or roughness as the pulley rotates.
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Unread 06-12-2009, 02:46 AM   #14
srb43
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Before you tear down,check to make sure when the bearing failed,it didn't tear up or overheat the front seal of the compressor.I wouldn't want to go through all the work,only to find out that you can't hold freon any more.Use an a/c sniffer to check for any leaks.
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Unread 08-29-2009, 03:28 PM   #15
kkchevy3
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what about a pully that feels tight but you can see wobbles just a tiny bit.
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