Horizon
Treadmill

Model # 820T Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon 820T treadmill, 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 111 parts  |

Deck Bolt MZE0105005
#B19

Treadmill diagram

Deck bolt

Part #MZE0105005

Replaced by #004562-00

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Manufacturer substitution
This part replaces MZE0105005. Substitute parts can look different from the original.
This item is not returnable
In Stock
Wheel MB0103040CA
#B24

Treadmill diagram

Wheel

Part #MB0103040CA

Replaced by #000037-CA

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Manufacturer substitution
This part replaces MB0103040CA. Substitute parts can look different from the original.
This item is not returnable
In Stock
Sensor MC0510031D
#P14

Treadmill diagram

Sensor

Part #MC0510031D

Replaced by #002248-D

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Manufacturer substitution
This part replaces MC0510031D. Substitute parts can look different from the original.
In Stock
T-wrench MZE1002003
#KIT

Treadmill diagram

T-wrench

Part #MZE1002003

Replaced by #005393-00

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Manufacturer substitution
This part replaces MZE1002003. Substitute parts can look different from the original.
In Stock
Nut MZE0204013
#M18

Treadmill diagram

Nut

Part #MZE0204013

Replaced by #004934-00

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Manufacturer substitution
This part replaces MZE0204013. Substitute parts can look different from the original.
This item is not returnable
In Stock
Screw MZE0112120
#Z11

Treadmill diagram

Screw

Part #MZE0112120

Replaced by #004777-Z

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Manufacturer substitution
This part replaces MZE0112120. Substitute parts can look different from the original.
This item is not returnable
In Stock
Washer MZE0505033
#H08

Treadmill diagram

Washer

Part #MZE0505033

Replaced by #005196-00

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Manufacturer substitution
This part replaces MZE0505033. Substitute parts can look different from the original.
This item is not returnable
In Stock
Nylon Nut ME0204025
#B31

Treadmill diagram

Nylon nut

Part #ME0204025

Replaced by #004941-00

?
Manufacturer substitution
This part replaces ME0204025. Substitute parts can look different from the original.
This item is not returnable
In Stock
Washer MZE0502017
Washer

Part #MZE0502017

Replaced by #020425-00

?
Manufacturer substitution
This part replaces MZE0502017. Substitute parts can look different from the original.
This item is not returnable
In Stock
Arc Washer ME0503001
Arc washer

Part #ME0503001

Replaced by #005163-00

?
Manufacturer substitution
This part replaces ME0503001. Substitute parts can look different from the original.
This item is not returnable
In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…

Main causes: rear roller out of alignment, damaged walking belt, bad roller…

Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor…

Main causes: faulty sensors, wiring failure, bad control console…

Main causes: bad control console, wiring failure, bad motor control board…

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor…

Main causes: damaged walking belt, improper belt tension, bad roller bearing…

Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

How to replace a treadmill motor controller

How to replace a treadmill motor controller

Your treadmill motor won't run with a defective motor controller. Replace the motor controller if it doesn't operate the…

Repair difficulty
Time required
 15 minutes or less
How to replace a treadmill walking belt

How to replace a treadmill walking belt

A worn walking belt will begin to slow down during use. If your treadmill walking belt is worn out, replace it using the…

Repair difficulty
Time required
 45 minutes or less
How to replace a treadmill drive motor

How to replace a treadmill drive motor

A defective drive motor won't run when activated by the motor controller. Replace the treadmill drive motor if it doesn'…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your fitness & exercise

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

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…