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Horizon
Treadmill

Model # QUANTUM Official Horizon treadmill

Here are the diagrams and repair parts for Official Horizon QUANTUM 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 119 parts  |
Breaker MC0702011
#P04

Treadmill assembly 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
Washer MZE0505033
#B65

Treadmill assembly diagram

Washer

Part #MZE0505033

Replaced by #005196-00

?
Manufacturer substitution
This part replaces MZE0505033. Substitute parts can look different from the original.
This item is not returnable
$2.26
In Stock
Insert MZE0301009
#K10

Treadmill assembly diagram

Insert

Part #MZE0301009

Replaced by #004972-00

?
Manufacturer substitution
This part replaces MZE0301009. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Wheel MB0103029C
#L01

Treadmill assembly diagram

Wheel

Part #MB0103029C

Replaced by #000031-C

?
Manufacturer substitution
This part replaces MB0103029C. Substitute parts can look different from the original.
This item is not returnable
$3.05
In Stock
Screw MZE0104203
#R04

Treadmill assembly diagram

Screw

Part #MZE0104203

Replaced by #004486-00

?
Manufacturer substitution
This part replaces MZE0104203. Substitute parts can look different from the original.
This item is not returnable
$3.79
In Stock
Insert MZE0301013
#B63

Treadmill assembly diagram

Insert

Part #MZE0301013

Replaced by #004974-00

?
Manufacturer substitution
This part replaces MZE0301013. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Nut MZE0204004
Nut

Part #MZE0204004

Replaced by #004925-00

?
Manufacturer substitution
This part replaces MZE0204004. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Safety Key SZTM58SFK
#AN2

Treadmill assembly diagram

Safety key

Part #SZTM58SFK

Replaced by #016488-Z

?
Manufacturer substitution
This part replaces SZTM58SFK. Substitute parts can look different from the original.
$8.91
In Stock
Bolt ME0112117
#C10

Treadmill assembly diagram

Bolt

Part #ME0112117

Replaced by #004774-00

?
Manufacturer substitution
This part replaces ME0112117. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Motor Set SZTM59MTR-1
#M01

Treadmill assembly diagram

Motor set

Part #SZTM59MTR-1

Replaced by #016507-Z

?
Manufacturer substitution
This part replaces SZTM59MTR-1. Substitute parts can look different from the original.
$261.04 | 
$12.00 OFF Phone Price : $273.04
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…

Read more
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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