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Author Topic: DC28 Strip down and refurb  (Read 3432 times)

Offline taran57

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DC28 Strip down and refurb
« on: January 30, 2017, 01:24:08 AM »
Here we go chaps, the worlds most complicated vacuum cleaner. And the only one dumb enough to take it to bits.  :))
Apologies for any pics that aren't too clear or the wrong way up, this is my first strip down post!

The beast itself, very brutalist looking.


AIRMUSCLE


Tools off.


cyclone off


filters out


hose and wand off, I didn't strip either down as they were quite clean and only needed a good wipe over.


hose is the same part as DC25.



Offline taran57

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Re: DC28 Strip down and refurb
« Reply #1 on: January 30, 2017, 01:35:08 AM »
Next take your trusty silver dollar (they work better than quarters) and release the sole plate,




rope seal out


wheels popped off


Big beefy brushbar, next we remove the 5 screws holding the camshaft cover on and remove it



camshaft and cams which adjust the height of the brushbar




Microswitches which tell the controller what position the camshaft is in




Offline taran57

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Re: DC28 Strip down and refurb
« Reply #2 on: January 30, 2017, 01:50:52 AM »
Next remove your internal hose


then you can unclip the belt cover


off with blockage flap


next we remove the wheels and axle which will then let you slide out the pivot for the AirMuscle acutator






Remove the suction tubing from the connections




Offline taran57

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Re: DC28 Strip down and refurb
« Reply #3 on: January 30, 2017, 02:04:23 AM »
Clear head pivot springs out,


remove the screws holding the clutch cover/airmuscle and remove the cover



exposing the clutch and looms



unclip the looms and remove the belt cover


this exposes the clutch to motor geared belt, check out the pre tensioner!


pop the clear housing from its pivots, remove the camshaft motor and motor with loom then the clear housing, clutch and brushroll are free from the machine.




Offline taran57

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Re: DC28 Strip down and refurb
« Reply #4 on: January 30, 2017, 02:22:00 AM »
clutch engage/disengage gear, driven by its own motor with position switches


remove hall effect sensor and unscrew clutch end cap


friction surfaces



remove circlip and clutch will spring apart, this also frees the clutch to brushbar belt



clutch servo motor, i elected not to remove it, but it did clean the worm gear

Offline taran57

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Re: DC28 Strip down and refurb
« Reply #5 on: January 30, 2017, 02:31:59 AM »
prise each end of the brushbar out of the clear housing




Next we remove and strip the airmuscle bleed off valve, this is operated by a cam on the camshaft, suction from the main motor is applied to the airmuscle when the machine is in medium and deep pile mode.



possible date for the machine?


last piece off the clear housing is the belt chute


then the airmuslce actuator itself is removed from the clutch cover and split



Offline taran57

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Re: DC28 Strip down and refurb
« Reply #6 on: January 30, 2017, 02:37:41 AM »
pop off the retaining clips, at least these are normal ones!



then off with the cleaner head



the microswitch loom is then unclipped from the cleaner head along with the belt tensioner rollers and springs, i elected to leave the carriers in place for fear of breakage





this is the only the cleaner head stripped, bit of a polava!  :underchair: :coffee:

Offline taran57

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Re: DC28 Strip down and refurb
« Reply #7 on: January 30, 2017, 02:49:57 AM »
Now we move onto the main duct assembly and motor which is similar do the DC27, although the American DC27 does not have a clutch knob or helix brushbar.

Off with the slip rings


unscrew and prise out the pin for the post filter lid



unscrew and wiggle out the lower motor cover





this exposes the main CB and looms







remove the diffuser


Offline taran57

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Re: DC28 Strip down and refurb
« Reply #8 on: January 30, 2017, 02:58:02 AM »
Now we have to remove the switches and interface CB.





Anyone know what this dilly whomper does? i left it alone



interface CB and switches, these control the settings





main cord off, neutral through the little black box and positive on the main switch







next out is the spine wiring, with the low voltage control cable under the main power cable.


Offline taran57

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Re: DC28 Strip down and refurb
« Reply #9 on: January 30, 2017, 03:07:05 AM »
entry seals off


want latch left in place



blockage bypass valve out next





next we unscrew and have a fight and a hissy fit to remove the motor bucket  :angryman:



then the upright switch and loom





next to remove is the changeover valve, which again works similar to DC25.

Offline taran57

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Re: DC28 Strip down and refurb
« Reply #10 on: January 30, 2017, 03:13:00 AM »
Change over valve split







port plate come off next



pry off the motor retaining ring, pull out motor and strip off rubber, i didnt remove the loom from the bucket as it was too much of a pain.







[ Specified attachment is not available ]

Offline taran57

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Re: DC28 Strip down and refurb
« Reply #11 on: January 30, 2017, 03:14:32 AM »
Onto the cyclone now, this is the same at the DC27 and DC33

Offline taran57

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Re: DC28 Strip down and refurb
« Reply #12 on: January 30, 2017, 03:21:31 AM »
Remove the bin, bin release button and then unscrew the cyclone lid







unscrew the small cone lid, my gasket was in good condition.





now prise the shroud from the cones,





then the lower cone and seals



and strip the bin of the pushrod and seal



cyclone done!

Offline taran57

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Re: DC28 Strip down and refurb
« Reply #13 on: January 30, 2017, 03:25:35 AM »
split apart the pre filter housing



screws from the DC28



Now we have a fully stripped DC28 ready for the wash, phew!





I'm sitting here completely surrounded by no beer.  :boggleeye:

Online Parwaz7862

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Re: DC28 Strip down and refurb
« Reply #14 on: January 30, 2017, 03:49:15 AM »
WOO YEH!!! American Beko style! This is awesome! I enjoyed reading this, thanks for posting!

PS that may possibly be a date on that clear part, 21st of June 2011?

I'm surprised the brushroll was removable- thought it was permanently means to stay there as a complete unit, looks like Dyson doesn't do that

Is the main motor a DC07 motor with a special spindle?
DC14s are tanks, just need a slightly longer motor life. Do plastic parts often break on DC14s? Nope. DC41- Sexy looking futuristic and powerful machine. Just needs a better designed cleaner head wheel and cyclone clip along with a dense metal rod in the chassis.

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