Screeching from HF Central Machinery Dust Collector

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Forum topic by danoaz posted 12-25-2013 04:12 PM 1235 views 0 times favorited 9 replies Add to Favorites Watch
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222 posts in 2167 days

12-25-2013 04:12 PM

Topic tags/keywords: dust collector noise central machinery machine noise harbor freight

Back in September I bought the Central Machinery 2HP Dust Collector. It is doing what all I wanted except when I turn it off it whines down with a horrible screeching noise. I hesitate to start putting grease anywhere. I see on the instructions diagram there is a “packing” washer like thing and wonder if that could be the issue.
The noise is worse than fingernails on a chalkboard and since I am in the attached Garage it just transfers into the house. Ugh!!

Anyone else have or had this problem?

-- "Simplicity and repose are the qualities that measure the true value of any work of art." Frank LLoyd Wright

9 replies so far

View Paul Stoops's profile

Paul Stoops

348 posts in 2558 days

#1 posted 12-27-2013 12:52 AM

You don’t give us a whole lot of information to go on, but I will give it a whirl. It is possible that the impeller has come loose and moved down the motor shaft and is making contact with the fan casing/cover. When the DC is operating the air is flowing into the center of the fan, which pushes the fan away from the cover—hence you don’t hear the noise. However, when you turn it off, that inward force is no longer there and the fan can move outward toward the cover. If the fan is loose on the motor shaft it could move as I have described above. Another possibiliity is that you have sucked in something that is caught on one of the fan blades, but it only makes contact when the inward air pressure is released.

I would take out the row of screws/bolts around the face of the fan housing and remove the cover. It is a good idea to mark one of the hole positions on the fan case which will make it easier to get it back together. Once you can see the fan you should be able to determine the cause of your mysterious noise.

Let us know what you find.

-- Paul, Auburn, WA

View DKV's profile


3940 posts in 2501 days

#2 posted 12-27-2013 12:54 AM

danoaz, the problem is HF… :-)

-- This is a Troll Free zone.

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Paul Stoops

348 posts in 2558 days

#3 posted 12-27-2013 01:02 AM

I think it is sad DKV, when someone makes a request for help that all you can come up with is sarcasm. For someone who uses an avatar depicting the Jesus that I know, this seems like a curious response.

-- Paul, Auburn, WA

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3940 posts in 2501 days

#4 posted 12-27-2013 01:04 AM

Paul, the problem couldn’t be HF?

-- This is a Troll Free zone.

View JollyGreen67's profile


1669 posts in 2760 days

#5 posted 12-27-2013 02:49 AM

Mine screeches like a banshee when it’s initially turned on, then goes quiet after a few minutes. I attribute it to being cold, it being winter and all, because it doesn’t screech when it’s warm. I’ve disassembled it a “thousand” times and found nothing wrong. Cold bearings?

-- When I was a kid I wanted to be older . . . . . this CRAP is not what I expected !

View Shawn Masterson's profile

Shawn Masterson

1325 posts in 1945 days

#6 posted 12-27-2013 04:17 AM

junk bearings

View ajosephg's profile


1880 posts in 3558 days

#7 posted 12-27-2013 05:41 AM

Harbor Freight dust collectors generally have good reviews. +1 for what Paul said. I’d also look for a piece of wood that may have gotten lodged between the fan and the motor.

-- Joe

View PaulDoug's profile


1535 posts in 1700 days

#8 posted 12-27-2013 04:14 PM

If it is still under their warranty I would return it. It shouldn’t do that. I’ve had mine for years and not had a problem with it other than the switch going out. that was a very easy fix.

-- “We all die. The goal isn't to live forever; the goal is to create something that will.” - Chuck Palahniuk

View thesoninlaw's profile


97 posts in 1782 days

#9 posted 12-27-2013 06:24 PM

I agree with PaulDoug—I have the DC in question and it runs quite quietly, starts quietly and spools down quietly.

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