Author Topic: Pre-filter keeps blocking (Read 6275 times)

dsam · « **on:** March 20, 2015, 11:34:15 pm »

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.

Madrat · « **Reply #1 on:** March 21, 2015, 04:45:57 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.

dsam · « **Reply #2 on:** March 22, 2015, 05:40:00 pm »

tried this and was ok, even changed it with another 1 and still no joy.

MVacs · « **Reply #3 on:** March 22, 2015, 05:57:20 pm »

Is the cyclone leaking at any of its joints. Look for a hissing from the middle of the cyclone when running.

Madrat · « **Reply #4 on:** March 22, 2015, 06:50:58 pm »

The noise that comes from a DC07 would you be able to hear a hiss ?

beko1987 · « **Reply #5 on:** March 22, 2015, 09:28:56 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?

MVacs · « **Reply #6 on:** March 23, 2015, 12:54:56 am »

Quote from: Madrat on March 22, 2015, 06:50:58 pm

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.

Madrat · « **Reply #7 on:** March 23, 2015, 12:41:18 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.

dsam · « **Reply #8 on:** March 23, 2015, 01:05:08 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.