Horizon
Treadmill

Model # RT1 Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon RT1 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 135 parts  |

Wheel MB0103006B
#L05

Cycle diagram

Wheel

Part #MB0103006B

Replaced by #000021-B

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Manufacturer substitution
This part replaces MB0103006B. Substitute parts can look different from the original.
This item is not returnable
In Stock
Rail Lock MB0643001
#L10

Cycle diagram

Rail lock

Part #MB0643001

Replaced by #001251-F

?
Manufacturer substitution
This part replaces MB0643001. Substitute parts can look different from the original.
This item is not returnable
In Stock
Sensor MC0510041A
#P14

Cycle diagram

Sensor

Part #MC0510041A

Replaced by #002248-D

?
Manufacturer substitution
This part replaces MC0510041A. Substitute parts can look different from the original.
In Stock
Sensor MC0510031D
#P14

Cycle diagram

Sensor

Part #MC0510031D

Replaced by #002248-D

?
Manufacturer substitution
This part replaces MC0510031D. Substitute parts can look different from the original.
In Stock
Cable MC0503001B
#P08

Cycle diagram

Cable

Part #MC0503001B

Replaced by #002124-B

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Manufacturer substitution
This part replaces MC0503001B. Substitute parts can look different from the original.
This item is not returnable
In Stock
Motor Set SZTM61MTR
#M01

Cycle diagram

Motor set

Part #SZTM61MTR

Replaced by #016507-Z

?
Manufacturer substitution
This part replaces SZTM61MTR. Substitute parts can look different from the original.
In Stock
Kss Clip MB0905016
#P12

Cycle diagram

Kss clip

Part #MB0905016

Replaced by #001675-00

?
Manufacturer substitution
This part replaces MB0905016. Substitute parts can look different from the original.
This item is not returnable
In Stock
Belt MD0602023
#R03

Cycle diagram

Belt

Part #MD0602023

Replaced by #1000109577

?
Manufacturer substitution
This part replaces MD0602023. Substitute parts can look different from the original.
In Stock
End Cap MB0609018B
#N61

Cycle diagram

End cap

Part #MB0609018B

Replaced by #000906-B

?
Manufacturer substitution
This part replaces MB0609018B. Substitute parts can look different from the original.
This item is not returnable
In Stock
Screw MZE0104203
#R04

Cycle diagram

Screw

Part #MZE0104203

Replaced by #004486-00

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Manufacturer substitution
This part replaces MZE0104203. 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.…