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Horizon
Treadmill

Model # T30 Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon T30 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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Showing 10 of 60 parts  |
Rail Lock MB0643001
#Q10

Treadmill assembly diagram

Rail lock

Part #MB0643001

Replaced by #001251-F

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Manufacturer substitution
This part replaces MB0643001. Substitute parts can look different from the original.
This item is not returnable
$3.92
In Stock
Screw MZE0104203
#R04

Treadmill assembly diagram

Screw

Part #MZE0104203

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

Insert MZE0301009
#K10

Treadmill assembly diagram

Insert

Part #MZE0301009

Replaced by #004972-00

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Manufacturer substitution
This part replaces MZE0301009. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Decal-d MG0256025A
#V13

Treadmill assembly diagram

Decal-d

Part #MG0256025A

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

Wheel MB0103007B
#L06

Treadmill assembly diagram

Wheel

Part #MB0103007B

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

Base Frame SP0021003AB
#AK1

Treadmill assembly diagram

Base frame

Part #SP0021003AB

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

Screw MZE0107010
#B54

Treadmill assembly diagram

Screw

Part #MZE0107010

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

Pad MB0606002
#B53

Treadmill assembly diagram

Pad

Part #MB0606002

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

Washer ME0502053
#L10

Treadmill assembly diagram

Washer

Part #ME0502053

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

Deck Exten MB0603001
#B55

Treadmill assembly diagram

Deck exten

Part #MB0603001

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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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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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 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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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…

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Repair difficulty
Time required
 15 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
How to replace a treadmill walking board

How to replace a treadmill walking board

A worn-out walking board creates friction with the walking belt and causes the belt to slow down during use. Replace the…

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Repair difficulty
Time required
 30 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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