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My Dust Collector sucks at sucking

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Forum topic by Marleywoodie posted 09-24-2019 02:14 PM 1041 views 0 times favorited 17 replies Add to Favorites Watch
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Marleywoodie

30 posts in 974 days


09-24-2019 02:14 PM

Hi Friends,

The DC system in my shop has developed a distinct last of suction. All the hoses are clear and the gates are properly closed. Used to be much more suction. A while back the motor was making a funny noise when shutting off/winding down, but it sounds OK(ish) now. I took the squirrel wheel cover off, and all the blades on the impeller are find. Is it time to put her down? It’s a Central Machinery 2HP. It’s gotta 10+ years old, I’m not the original owner.

-- - Not all who wander are lost -


17 replies so far

View Redoak49's profile

Redoak49

4245 posts in 2533 days


#1 posted 09-24-2019 02:16 PM

Plug
Leak
Filter
Motor. Check with meter

View therealSteveN's profile

therealSteveN

4177 posts in 1119 days


#2 posted 09-24-2019 02:57 PM

Still sporting the cloth bag for filtration/air movement? If so they are the weak spot, and if you swapped to a pleated type filter, or even shook the daylights out of that bag, and then sent it through a trip through a LAUNDROMAT washer dryer. Believe me Momma would kill you using the home equipment…..

I think the cleaning, or all together swapping out of the filter material would also bring around the suction you remember. Maybe even better with a pleated filter.

Probably the most often suggested pleated filter comes from here.

Cleaning the filter costs almost nothing, and would quickly tell you if you were on the right track. If right after you are seeing renewed suction, you know which way to head. If the $$$$$ for the filter is more than you want to put into the HF system (understandable) then you know on a semi regular basis you need to make a trip to the laundromat.

Seeing as it’s still comfortable weather everywhere in the US, if you had a washtub, you could shake it out, suction it off with a shop vac from the inside, where all the junk hits it, then dunk it several times in some soapy water, then hang it outside to dry. What happens is the pores of the cloth get filled with dust, sap, and whatever from the wood, and just plug the cloth fibers so they will hardly allow water to pass through. You need to wash that stuff out completely, then after it dries, “almost” as good as new. There will come a time, when even washing doesn’t help anymore, and buying a new cloth bag, or a pleated filter are your only option.

-- Think safe, be safe

View EarlS's profile

EarlS

3249 posts in 2892 days


#3 posted 09-24-2019 05:09 PM

Check all of your lines to make sure there aren’t any pieces of wood scrap or shavings hung up in it. Clean out your filter. Make sure the shaft bolt holding the impeller on the motor shaft hasn’t worked loose.

-- Earl "I'm a pessamist - generally that increases the chance that things will turn out better than expected"

View CaptainKlutz's profile

CaptainKlutz

1962 posts in 2039 days


#4 posted 09-24-2019 06:19 PM

+1 what they said above.


A while back the motor was making a funny noise when shutting off/winding down, but it sounds OK(ish) now.
- Marleywoodie

First: Did you spin the impeller by hand, and check the motor bearings for noise or play?
If fan motor makes squealing/screeching noise after power is removed, most time you have worn bearings. Motor will eventually slow down, burn up, or get locked rotor condition if bearings are not replaced.
IME – Cheap Chinese motor bearings last ~5 yr with regular use. After 10-15 years, the grease in any shielded/sealed bearing gets waxy, stops lubricating as it was intended, and needs to be replaced.
Can fix it yourself spending ~$20 on some decent motor bearings. Motor shop will charge $75-125 to replace them.

If motor is ok, and don’t have loose wire: next most likely reason for lack of suck is filter medium is clogged. If a bag, take it off, turn it inside out, and beat the dust of it outside wearing mask. If pleated filter, gently use air hose and blow the dust out of pleats from outside. Both of these are considered regular maintenance items.

Best Luck.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View pottz's profile

pottz

6779 posts in 1529 days


#5 posted 09-24-2019 07:10 PM

+2 to what has been said.as the cap’n said could be a bearing problem.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View ibewjon's profile

ibewjon

1040 posts in 3338 days


#6 posted 09-24-2019 11:54 PM

Don’t wash the bag. The dust cake on the inside increases filtration. To a point. Shake and beat ( outside ) but don’t wash.

View therealSteveN's profile

therealSteveN

4177 posts in 1119 days


#7 posted 09-25-2019 06:39 AM

I own a HF dust collector, and unlike many of the higher end DC’s the bags on them aren’t treated with anything more than the size of the holes in the material. 5 Micron, bats can fly through the pores, no treatment.

For the OP, try just using a shop vac, and compressed air to clean it. see if anything happens. If all else fails, and you are going to have to buy another bag, or a pleated filter, what do you have to lose, wash it. I have mine several times, and it improves the air flow, and thus the suction.

-- Think safe, be safe

View Charlie H.'s profile

Charlie H.

390 posts in 1195 days


#8 posted 09-28-2019 04:03 PM



......... a trip through a LAUNDROMAT washer dryer. Believe me Momma would kill you using the home equipment…..
- therealSteveN

If you get nothing else out of this thread listen carefully to the advice quoted above…... I lived, but it was a touch-n-go situation.

-- Regards, Charlie in Rowlett, TX --------I talk to myself, because sometimes I need expert advice.---------

View Marleywoodie's profile

Marleywoodie

30 posts in 974 days


#9 posted 10-17-2019 02:18 PM

So, update, after cleaning out the upper bag, it appears suction is much better. I can’t check the full system as my shop is torn up due to replacing the windows in it. I’m going to re-run the hose for more clear routes with less dips, etc. I’ll update when I get that completed. Thanks for all the suggestions.

-- - Not all who wander are lost -

View ibewjon's profile

ibewjon

1040 posts in 3338 days


#10 posted 10-17-2019 03:52 PM

For better suction, put in hard duct.. A world of difference over hose…even straight hose has a lot of drag.

View Marleywoodie's profile

Marleywoodie

30 posts in 974 days


#11 posted 10-17-2019 06:04 PM



For better suction, put in hard duct.. A world of difference over hose…even straight hose has a lot of drag.

- ibewjon

What do you use for that?

-- - Not all who wander are lost -

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ibewjon

1040 posts in 3338 days


#12 posted 10-17-2019 06:16 PM

I use steel duct, 26 guage, 5” diameter. The ridges in the hose really slow things down.

View awsum55's profile

awsum55

696 posts in 1053 days


#13 posted 10-17-2019 10:56 PM

I use 4” PVC the thin stuff, not schedule 40 and it works great, much better than the hose.

-- John D, OP, KS

View therealSteveN's profile

therealSteveN

4177 posts in 1119 days


#14 posted 10-17-2019 11:55 PM

Ridged hose is the lowest denominator to carry stuff to the vac. Smoother the better, and on sweeps, and turns the gentler the arc the better. hard 90’s on ridged plastic hose can stop you dead in your tracks if you are using it on runs. Now a 10’ piece of ridged plastic hose on a DC you are bringing around tool to tool will work ok. So it really matters the type system you are talking about.

-- Think safe, be safe

View Marleywoodie's profile

Marleywoodie

30 posts in 974 days


#15 posted 11-14-2019 10:07 PM



I use 4” PVC the thin stuff, not schedule 40 and it works great, much better than the hose.

- awsum55

Where do you get that? I quickly realized regular 4” PVC was overkill…

-- - Not all who wander are lost -

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