Dyson DC04 motor change
Remember to have the appliance unplugged before attempting this repair
Possible symptoms of a damaged motor
The things to look out for are:
A strong smell of burning
The motor may sound laboured
The motor may make a low popping bubbling noise
Smoke from motor case area
High pitched noise may indicate motor bearings are worn.
Tools needed and other information
A T15 torx screwdriver is needed for the screws ( you can purchase a cheap top quality one here )
Large flat blade screwdriver for the retainers on the soleplate.
This repair was carried out on a silver and grey machine these have a single belt.
Repairs to dual belt machines are similar to this guide but brush bar removal etc is quite different.

Unclip bin from body

Remove bin from body

Unscrew three soleplate retainers

Remove soleplate

Pull belt of motor shaft.

Pull brushbar out

The small hose here needs to be pulled off

It comes of quite easily

Now unclip the soleplate away from the foot of the vacuum

Both sides. It does sometimes require a bit of effort

Unclip this inspection tube

Now unclip these green plastic retainers, a screwdriver helps

Both sides

Just ease them off

Now put the vacuum in this position

Bend these lugs away from the body on both side

A steady hand is needed

And it comes off completely

This is what you should have now

Eight T15 torx screws to remove. Heres the first circled

Two on this side circled

Three at the bottom

The other two are behind the filter. Unclip the cover

Pull out this filter

The top two need unscrewing

Close up

With the screws out the motor outer case will pull apart

Remove from the body of the vacuum

Pull this piece of trim off

Four lugs on the motor case hold the lid in place

Unclip the lugs gently and remove the lid

The motor now needs pushing out of the case, this can require some effort and is best pushed with two thumbs (camera was in other hand)

The motor is now out of its case

This is the old motor and the top motor mount.
Note the wires and disconnet the motor

This is the new motor

I have taken the old motor mount and put it on the new motor

Now remove the lower motor mount from the old motor

And fit it to the new motor

Attach the wires and push the new motor back into the case.
There are 2 pins that push into the top mount (arrowed)

Put the lid back on

Refit this piece of trim

Sit it back into the body

Refit the top motor case and screw it together

Refit the base of the vacuum

Now refit the retainers on both sides

Refit the small hose

Clip the soleplate back

Push belt and brushbar back into position

Refit the belt

Check brushroll moves free

Refit soleplate and screw retainers

Refit the inspection tube

Replace the lid and filter

Refit the dust bin and test
Please remember to PAT test your appliance after repair and if in any doubt get a professional to do it.
If you have any comments on this guide please email me