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Horizon
Treadmill

Model # T81 Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon T81 treadmill, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 112 parts  |
Treadmill Nut 004926-00
#H26

Frame assy diagram

Treadmill nut

Part #004926-00

This item is not returnable
$2.16
In Stock
Exercise Equipment Washer 005196-00
#H27

Frame assy diagram

Exercise equipment washer

Part #005196-00

This item is not returnable
$2.26
In Stock
Bolt 004714-AD
#Z14

Frame assy diagram

Bolt

Part #004714-AD

This item is not returnable
$2.16
In Stock
Horizon Label 079318
#V03

Console assy diagram

Horizon label

Part #079318

This item is not returnable
$2.53
In Stock
Horizon Decal 079316
#V01

Belt assy diagram

Horizon decal

Part #079316

This item is not returnable
$6.62
In Stock
Washer 005070-00
#NI

Frame assy diagram

Washer

Part #005070-00

This item is not returnable
$2.16
In Stock
Afg Wheel 000037-CC
#L05

Frame assy diagram

Afg wheel

Part #000037-CC

This item is not returnable
$2.49
In Stock
Screw 004614-AB
#N59

Console assy diagram

Screw

Part #004614-AB

This item is not returnable
$2.16
In Stock
Horizon Sticker 079321
#NI

Frame assy diagram

Horizon sticker

Part #079321

This item is not returnable
$2.53
In Stock
Motor Cover 081676
#NI

Frame assy diagram

Motor cover

Part #081676

This item is not returnable
$5.66
In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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Why won't my treadmill power up?

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

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Why is my treadmill's walking belt off center?

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

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Why won't my treadmill start even though the console display works?

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

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Why is my treadmill's heart rate sensor not accurate?

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

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Why does my treadmill have no display?

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

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Why does my treadmill's walking belt slow down?

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

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Why is my treadmill's walking belt slipping?

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

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Repair guides for treadmills

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

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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…

Read more
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…

Read more
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'…

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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.

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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.…

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