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Author Topic: Pre-filter keeps blocking  (Read 2168 times)

Offline dsam

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Pre-filter keeps blocking
« on: March 21, 2015, 01:34:15 AM »
Hi, does anyone know why the filter blocks up after about 4-5 uses, it seems to be sucking to to much dust and fluff threw the cyclone onto the sponge filter. Ive swaped the cyclone unit with another 1 and it doesnt block up so its definately something to do with the old cyclone, power washed clean to no avail.

Online Madrat

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Re: Pre-filter keeps blocking
« Reply #1 on: March 21, 2015, 06:45:57 PM »
Check the rubber ring at the bottom of the cyclone.  It will probably be split or perished letting the dust through onto the filter.

Offline dsam

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Re: Pre-filter keeps blocking
« Reply #2 on: March 22, 2015, 07:40:00 PM »
tried this and was ok, even changed it with another 1 and still no joy.

Online MVacs

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Re: Pre-filter keeps blocking
« Reply #3 on: March 22, 2015, 07:57:20 PM »
Is the cyclone leaking at any of its joints. Look for a hissing from the middle of the cyclone when running.

Online Madrat

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Re: Pre-filter keeps blocking
« Reply #4 on: March 22, 2015, 08:50:58 PM »
The noise that comes from a DC07 would you be able to hear a hiss ? 

Online beko1987

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Re: Pre-filter keeps blocking
« Reply #5 on: March 22, 2015, 11:28:56 PM »
Run a small bead of silicone around the middle joint if it's leaking air. Did the top handle seal refit correctly when you took it off to wash the cyclone?
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Online MVacs

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Re: Pre-filter keeps blocking
« Reply #6 on: March 23, 2015, 02:54:56 AM »
The noise that comes from a DC07 would you be able to hear a hiss ?

Its challenging I know, but we had one recently leaking there on test after refurb. It just didn't sound right and performance was down. It took a few minutes of testing, but we found the hiss in the end. After a new cyclone it was golden.

Online Madrat

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Re: Pre-filter keeps blocking
« Reply #7 on: March 23, 2015, 02:41:18 PM »
I always give the top seal a good spray of silicone polish to make sure it sits properly, if there dry they are almost impossible to get back together.

Offline dsam

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Re: Pre-filter keeps blocking
« Reply #8 on: March 23, 2015, 03:05:08 PM »
I think were veering off topic, the suction is great no leaks. The question was why does hoover pick up ok but drag dust and fluff through to the pre-filter? In my eyes can only be the fdc seal at bottom of cyclone (which is fine) or the cyclone itself.

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