Does the MVP vacuum motor armature have brushes that need to be changed?

First check if the batteries are all good. If all batteries are good, check the carbon brushes if they still able to make contact to the armature of the motor. If the carbon brushes cannot make contact or all worn-out, replace the carbon brushes. If if it still does not work clean the armature of the motor by using emery paper. If still it doesn't work check your armature bearings and armature. Replace the defective parts.

The armature is bad, you need to replace the whole motor. IF the armature has worn down where the brushes contact it, then it is continuously shorting out when it runs.

if the old brushes does not work (there is an activated autostop from inside the brush to protect the armature collectors to get the spring after the brush between it . 1 look at the color of the fieldcoil of the motor and also the commutator (all collectors of the armature)
in 60% of cases with motors between 1200 and 1800 watt in many cases it is not worth the brush exchange. field coil is dark colored then the bearings are dry
Often the engines in a number of operating hours built and only has one collector to stabbing something and within a week you lose your brushes again, have you a motor in a Vacuum below 1000w then is the change to make 1 succesfully change of the brushes much higher . in most cases there are several equivalent motors for vaccuums The brand fixapart is one of the very good motors to use for equivalent . its good in Festool Protool Starmix and many more

Here an example
Fixapart Stofzuiger motor AB86 1000 W Miele Fixapart Vacuum cleaner motor AB86 1000 Miele W7 18501

The carbon brushes in your motor are worn out and "sparking" against the motor armature. DO NOT operate the vacuum in this condition or you may damage the armature so badly it will need replacement. Most vacuum dealers can replace the carbon brushes and resurface the armature. This should cost $40 to $50. If you need a new armature you are looking at $100 or more.

The likeliest causes would be a large item sucked up and into the fan, causing a loud rattling noise, or a piece of the fan broke, resulting in the same noise. This means replacing the fan assembly.
The armature brushes could also be worn down to the point of causing the brush holders to contact the armature, which will, and probably has, ruin the motor. A replacement of the motor is necessary.
Cost of repair/replacement would probably be higher than the vacuum is worth.

Some debris, even sand or dirt, probably got into the motor, causing damage to the armature. If this is the case, you will need to replace the motor. The burning smell from the motor is generally a sure sign of a bad motor.

SHORT carbon BRUSHES in the motor look on one of the two brushes the autostop protection protrudes at the front of the brush out. replace not direct the brushes , look for a healthy brass-colored wire of the stator field and armature if its dark beware of a short time of pleasure if the collectors are damaged if the engine has had its operating hours because of heating by fine dust cocked filters by time new brushes can have be shorted in a very short time again , and therfore is a brushes replace to expensive .

or a electric field contact a little change if its not a defect collector in the armature turn the motor a little on the top fan and switch the vaccuum on replace the motor if its run with bad noise replace the motor directly by a equivalent FIXAPART brand or any good equivalent , differs on the age of the whole vaccuum what the customer preferred.

The brushes that make contact with the motor's armature need to be cleaned. If you get into the motor and find that the armature is scored or burnt then you'll have to replace the motor.

4 possible reasons.
1 – one or both bearings are worn so armature (rotating part) wobbles as it is spinning and cause motor brushes to wear fast. Solution – change bearings too.
2 – Whoever replaced brushes – did not use some brush seating sticks to make cmutator smother and contour brushes to the shape of the comutator (not likely). Solution – appropriately install new set of brushes.
3 – Comutator is so warped that seating sticks do not help anymore – solution – new armature or turn the old armature.
4 – The fact that ONLY ONE brush was worn may mean that there is something wrong with the brush or housing. Maybe it could not move freely within the housing? I think this may be most likely cause it it may be a combination of all 4.Is it worth to fix? Hmm depends how much will it be. If this is 100+ - I’d say get newer Kirby for 300 ad enjoy the tech drive (Heritage does not have tech drive so it is much harder to vacuum with than the newer models)

You can replace the carbon brushes and most repair shops should have them. Also tho, the armature could be causing the problem, if you put in new brushs and it still arcs badly, then the armature is bad.