Motor operating temperature, normal or abnormal?

[Klectrolux]

I finally got around to cleaning out the motor half of my Silverado the other night. The motor cover appears to be warped from heat, although there is no heat damage on the wires. The cover, and the plastic diffuser top is a bit warped. Curious me got out my trusty infrared thermometer and, today, after about 20 mins of vacuuming I measured the temperature coming out the exhaust. I always leave the blower door open to allow more airflow.

When the machine was on I pointed the thermometer at the motor cover and got a reading of 72.3 celsius, but remember the reading is going to be skewed cause the hot air is blowing into the meter while its reading the motor cover temp. Immediately after shutdown I got a more accurate reading of about 55-61 celsius, and the metal body around the motor during operation was about 44 celsius. The air coming out of the motor is pretty warm, not as warm as my FQ, that machine runs HOT. Is this normal? And what could cause the motor cover to warp and the diffuser cover to slightly warp?

I know there were two different motors put into the Silverado during its production run, but so far none of them look like mine. My motor is mounted on an angle, as in the bearing plate/metal piece that holds the bearing and brushes is not parallel with the floor, it sits on about a 20 degree angle. Said bearning plate/brush cradle is marked "ELECTROLUX, USA" etc.. So it appears to be an Electrolux motor, anyone heard of this before?

 

[powertank]

My DJ runs pretty hot, but it certainly doesn't melt or warp any motor shields. I think yours is running a little hot. Does the motor sound labored? I'm not a lux expert, but I didn't think they made motors that mounted anything else but horizontally.

For us Americans, 60c is 140 degrees fahrenheit, and 44c is 111.2 F.

 

[Klectrolux]

The motor sounds fine, and has plenty of suction. Perhaps someone fooled around with the machine before I had it and plugged it up? Who knows.

 

[whirlpolf]

Euro Luxes

I can only speak for European Lux models, they all run pretty warm/hot compared to other brands. But neither have I ever found motor shield warping or non-horizontally mounted motors. They all go suction port, dust bag (Lux calls them "dust containers" here), then motor, then cable winder: All lined up horizontally and contentrically.

Z 325: Blows out handwarm air (less than a hairdryer on its lowest setting)
Z 730 and 770: The same.
Z 795: Even cooler.
A guess somewhat between 40 and 50 °C.
That's why I use them for de-icing freezer compartments, the warm air will crawl underneath any ice lumps in seconds and they fly off and can be taken out. Neither do I risk plastic parts of the freezer to get warped (like I would when using regular hair dryers). Just neat.

On rare occasions I have heard of some Lux machines having a high heat output along with a distinct smell of "insulation gone wrong". Maybe 2 or 3 in my life. Lux always swapped the motors with no charge against the latest development of motors available for that particular model, no questions asked.
But 73 °C seems a bit out of range to me.

Maybe the US models are different (look different) although I can see that the basic technology is the same: double pressure gauges for the bag, woven conical hoses, exhaust-air connector for the hose, aluminum wands with inner nylon sockets, winged upholstery-duster brush combo tool, flip-over nozzle on older machines and so on.
So why would motors be any different?

 

[whirlpolf]

correction on 795

in this machine, the motor is mounted in a 90° angle, a quarter of a full circle. Nevertheless: No odd angle here whatsoever.

 

[Klectrolux]

The first reading I think was skewed cause it was reading hot air blowing into the sensor and the surface at the same time, after shutdown the motor housing was about 61C.

It must be an Electrolux motor though? Electrolux USA is stamped all over the bearing plate/brush holder. Im gonna take the machine apart again and see if some "handyman" was in there playing around and didn't mount the motor back on properly. Cause there are 3 bolts holding the mounting plate onto the motor, so maybe, just maybe, Mr.Handyman didn't mount the motor plate back on the fan casing properly. We will see.