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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