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Horizon
Treadmill

Model # RCT7.6 Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon RCT76 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 164 parts  |
Socket MC0703023
#P07

Treadmill diagram

Socket

Part #MC0703023

Replaced by #019749-A

?
Manufacturer substitution
This part replaces MC0703023. Substitute parts can look different from the original.
This item is not returnable
$9.62 | 
9% OFF Phone Price : $10.62
Back Order
Breaker MC0702011
#P02

Treadmill diagram

Breaker

Part #MC0702011

Replaced by #003346-00

?
Manufacturer substitution
This part replaces MC0702011. Substitute parts can look different from the original.
$14.80
In Stock
Nut MZE0204005
Nut

Part #MZE0204005

Replaced by #004926-00

?
Manufacturer substitution
This part replaces MZE0204005. Substitute parts can look different from the original.
This item is not returnable
$2.16
Back Order
Nut ME0204008AB
#D10

Treadmill diagram

Nut

Part #ME0204008AB

Replaced by #004926-00

?
Manufacturer substitution
This part replaces ME0204008AB. Substitute parts can look different from the original.
This item is not returnable
$2.16
Back Order
Drive Belt MD0602001
#R03

Treadmill diagram

Drive belt

Part #MD0602001

Replaced by #1000109551

?
Manufacturer substitution
This part replaces MD0602001. Substitute parts can look different from the original.
$55.69 | 
10% OFF Phone Price : $61.69
In Stock
Rail Lock MB0643001
#B12

Treadmill 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
$3.92
In Stock
Elastomer MB0502018A
#B60

Treadmill diagram

Elastomer

Part #MB0502018A

Replaced by #018951-A

?
Manufacturer substitution
This part replaces MB0502018A. Substitute parts can look different from the original.
$8.67
In Stock
L Tray MB0601118AA
#N12

Treadmill diagram

L tray

Part #MB0601118AA

Replaced by #056318-AA

?
Manufacturer substitution
This part replaces MB0601118AA. Substitute parts can look different from the original.
This item is not returnable
$3.04
In Stock
Motor Cover MB0236083AA
#Q02

Treadmill diagram

Motor cover

Part #MB0236083AA

Replaced by #056259-AD

?
Manufacturer substitution
This part replaces MB0236083AA. Substitute parts can look different from the original.
$44.99
In Stock
Hardware SM0039217A

#NI03

All parts diagram

Hardware

Part #SM0039217A

Replaced by #057925-A

?
Manufacturer substitution
This part replaces SM0039217A. Substitute parts can look different from the original.
$17.61
In Stock

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'…

Read more
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…

Read more
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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