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Date:         Mon, 31 Jul 2000 10:36:54 -0700
Reply-To:     "Markov, Greg" <GMarkov@TeachMaster.com>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         "Markov, Greg" <GMarkov@TeachMaster.com>
Subject:      Re: Rad. fan R & R
Content-Type: text/plain; charset="iso-8859-1"

Jerry and others,

Below a post from my Mercedes list about the reparation of an Aux. fan. It comes courtesy of Dan Penoff. Hope this helps.

Cheers, Greg

Marshall,

I would tend to disagree. I've successfully rebuilt a number of aux fans over the years and have only had one that was a basket case upon opening. Here's what I've found:

1.) Stuck brushes.

2.) Worn brushes

3.) Crudded-up commutator

4.) Broken solder joint(s)

They're amazingly simple and don't require any special tools or know-how to rebuild. If you have one of those Ace or True Value hardware stores with the little pull-out boxes that have all the bizarre hardware you can find brushes for $2-$3 bucks.

I usually pull them apart, clean the commutator and undercut the bars with an Xacto knife, clean any and all bushings and bearings, put some ATF on the shaft and bushings/bearing and button them up. A 5-10 minute run-in off a spare battery (watch those blades! This fan is VERY powerful!!!) and it goes back in the car or on the shelf. I have a spare sitting there right now.

The one I did come across that was trashed had a bad bearing in it. Rather than mess with trying to find a replacement I just cannibalized it for future use. I'm willing to bet a trip to my local bearing supplier would net the proper bearing for it for very little $$$.

Dan Penoff 1984 300CD "Meuxmobile" http://www.dhc.net/~pmhack/mercedes/300cd841.HTM 1982 300SD "Ingrid" http://www.dhc.net/~pmhack/mercedes/300sd-82.htm Tampa, FL

-----Original Message----- From: Gerald Masar [mailto:azsun99@earthlink.net] Sent: Saturday, July 29, 2000 6:25 PM To: vanagon@GERRY.VANAGON.COM Subject: Rad. fan R & R

Listees, In the heat of the current Arizona summer, my cooling system and A/C are getting a real workout. When the rad. fan is on low speed, it sounds more or less normal for a van with 126K miles. But with the A/C on and the rad. fan switches to high speed, it is really noisey, more so when driving at moderate speed, almost as though it is overspeeding, like it is getting extra juice from the alternator. Is this possible, or is it just worn out bearings/bushings, or something else vibrating? Is there an easy (relative to Vanagons) way to R & R the rad fan? I see nothing in the Bentley other than that dropping the radiator can be done without draining it. Any help, as usual is greatly appreciated.

Jerry


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