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Hoover
Upright Vacuum

Model # U3721910 Official Hoover vacuum

Here are the diagrams and repair parts for Official Hoover U3721910 vacuum, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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ALL PARTS
Showing 10 of 186 parts  |
Vacuum Screw 21447041
#18

Handle diagram

Vacuum screw

Part #21447041

The manufacturer no longer makes this part, and there's no substitute part

Tape 54821001
#13

Motor diagram

Tape

Part #54821001

The manufacturer no longer makes this part, and there's no substitute part

Housing Cover 37951006
#19

Power max diagram

Housing cover

Part #37951006

The manufacturer no longer makes this part, and there's no substitute part

Canister Vacuum Screw 21447014
#20

Agitator housing diagram

Canister vacuum screw

Part #21447014

The manufacturer no longer makes this part, and there's no substitute part

Valve Spring 36132001
#47

Agitator housing diagram

Valve spring

Part #36132001

The manufacturer no longer makes this part, and there's no substitute part

Power Drive Unit 43124013
#17

Agitator housing diagram

Power drive unit

Part #43124013

The manufacturer no longer makes this part, and there's no substitute part

Washer 12 Pk 21312772
#6

Agitator housing diagram

Washer 12 pk

Part #21312772

The manufacturer no longer makes this part, and there's no substitute part

Flat Washer 21312801
#45

Agitator housing diagram

Flat washer

Part #21312801

The manufacturer no longer makes this part, and there's no substitute part

Vacuum Conical Washer 21347003
#3

Agitator diagram

Vacuum conical washer

Part #21347003

The manufacturer no longer makes this part, and there's no substitute part

Speed Nut 21362006
#30

Agitator housing diagram

Speed nut

Part #21362006

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your vacuum cleaners

Choose a symptom to see related vacuum cleaner repairs.

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Why does my vacuum cleaner shut off suddenly?

Main causes: damaged vacuum hose, clogged motor air filter, bad suction motor…

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Why doesn't my vacuum cleaner have good suction?

Main causes: weak suction motor, vacuum bag is full, clog in suction air path, dirty exhaust filter, leaky vacuum hose…

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Why doesn't my vacuum cleaner's brush roll spin?

Main causes: broken drive belt, damaged brush roll, tripped brush roll motor overload, bad brush roll motor, wiring fail…

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Why won't my vacuum cleaner turn on?

Main causes: lack of power, bad power cord, drive motor failure, wiring failure…

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Effective articles & videos to help repair your vacuum cleaners

Use the advice and tips in these articles and videos to get the most out of your vacuum.

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How to use a multimeter to test electrical parts video

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10 must-have tools for appliance repair

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Vacuum common questions

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