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From: John De Armond
Newsgroups: rec.outdoors.rv-travel
Subject: Re: roof A/C problem
Date: Sun, 03 Jun 2007 15:35:12 -0400
Message-ID: <>

Yes.  The motor will be exposed.  Unless they've vibrated out there should be an oil
tube on each end of the motor that is almost flush with the frame.  If they have
vibrated out then you'll see a U-shaped notch on the frame.  Look directly down the
hole with a flashlight and you'll see the oil hole in the bearing housing.  You'll
need an oiler with a long snout to reach down in there.

One word of caution.  Fan motor fail to start after the bearings wear out enough that
the rotor is no longer centered in the stator.  Even a little offset greatly reduces
starting torque.  Oiling up the bearings will make the motor work again but not for
long.  The wear will continue until the rotor drags on the stator. You'll probably
get another season out of the motor but do plan to replace it.

When you do replace the motor, remove it from the unit and take it to an electric
motor repair and supply company.  An alternative might be an HVAC supply if they
happen to sell motors.  The price will be half of what the mfr will charge.


On Sun, 03 Jun 2007 11:17:55 -0700, Hustlin' Hank <> wrote:

>So, my question is this, When I take the cover off the roof unit, will
>I be able to grease/lube the fan motor bearings/sleeves? Anybody else
>have this problem? Both units are Duo-therm.
>Hank <~~thinks it should be called a Hamster wheel because of all the
>trouble it has caused  :-)

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