Horizon
Treadmill

Model #T51 Horizon treadmill

Here are the diagrams and repair parts for Horizon T51 treadmill, as well as links to manuals and error code tables, if available.


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    Showing 10 of 115 parts

    Consl Case

    #N01A

    Horizon treadmill Diagram

    Consl case

    Part #001055-DA
    ?
    Manufacturer substitution
    This part replaces MB0617074BA. Substitute parts can look different from the original.
    This part replaces MB0617074BA
    $50.21

    In Stock

    Rubber Pad

    #M07

    Horizon treadmill Diagram

    Rubber pad

    Part #056374-AA
    ?
    Manufacturer substitution
    This part replaces MB0607001B. Substitute parts can look different from the original.
    This part replaces MB0607001B
    This item is not returnable
    $5.66

    In Stock

    Left Side Rail End Cap

    #Q07

    Horizon treadmill Diagram

    Left side rail end cap

    Part #001340-EA
    ?
    Manufacturer substitution
    This part replaces MB0665020BA. Substitute parts can look different from the original.
    This part replaces MB0665020BA
    $7.58

    In Stock

    Treadmill Reed Switch

    #N13

    Horizon treadmill Diagram

    Treadmill reed switch

    Part #001963-A
    ?
    Manufacturer substitution
    This part replaces MC0403014A. Substitute parts can look different from the original.
    This part replaces MC0403014A
    This item is not returnable
    $3.02

    In Stock

    Exercise Equipment Nut

    #L08

    Horizon treadmill Diagram

    Exercise equipment nut

    Part #004941-00
    ?
    Manufacturer substitution
    This part replaces ME0204025. Substitute parts can look different from the original.
    This part replaces ME0204025
    This item is not returnable
    $2.16

    In Stock

    Decal

    #V03

    Horizon treadmill Diagram

    Decal

    Part #006089-A
    ?
    Manufacturer substitution
    This part replaces MG0209008A. Substitute parts can look different from the original.
    This part replaces MG0209008A
    This item is not returnable
    $2.32

    In Stock

    Exercise Equipment Screw

    #P15

    Horizon treadmill Diagram

    Exercise equipment screw

    Part #004356-00
    ?
    Manufacturer substitution
    This part replaces MZE0102010. Substitute parts can look different from the original.
    This part replaces MZE0102010
    This item is not returnable
    $2.16

    In Stock

    SCREW

    #M31

    Horizon treadmill Diagram

    Screw

    Part #004408-00
    ?
    Manufacturer substitution
    This part replaces MZE0102093. Substitute parts can look different from the original.
    This part replaces MZE0102093
    This item is not returnable
    $2.16

    In Stock

    Exercise Equipment Screw

    #L11

    Horizon treadmill Diagram

    Exercise equipment screw

    Part #004425-B
    ?
    Manufacturer substitution
    This part replaces MZE0103014. Substitute parts can look different from the original.
    This part replaces MZE0103014
    This item is not returnable
    $2.16

    In Stock

    Treadmill Screw

    #M45

    Horizon treadmill Diagram

    Treadmill screw

    Part #004480-Z
    ?
    Manufacturer substitution
    This part replaces MZE0104073. Substitute parts can look different from the original.
    This part replaces MZE0104073
    This item is not returnable
    $2.16

    In Stock

    Symptoms for treadmills

    Choose a symptom to see related treadmill repairs.

    Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor
    Main causes: faulty sensors, wiring failure, bad control console
    Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor
    Main causes: rear roller out of alignment, damaged walking belt, bad roller
    Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor control board
    Main causes: bad control console, wiring failure, bad motor control board
    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.

    June 1, 2015
    By Lyle Weischwill
    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't run.

    Repair difficulty
    Time required
     15 minutes or less
    June 1, 2015
    By Lyle Weischwill
    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 motor correctly.

    Repair difficulty
    Time required
     15 minutes or less
    June 1, 2015
    By Lyle Weischwill
    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 walking board if it's worn or damaged.

    Repair difficulty
    Time required
     30 minutes or less

    Articles and videos for treadmills

    Use the advice and tips in these articles and videos to get the most out of your treadmill.

    January 18, 2016

    How to use a multimeter to test electrical parts video

    By Sears PartsDirect staff

    Learn how to use a multimeter to check for wiring problems in an appliance that's not working

    June 29, 2015

    Easy DIY treadmill repairs

    By Sears PartsDirect staff

    Learn about treadmill repairs that you can easily do yourself.

    June 1, 2015

    Treadmill common questions

    By Sears PartsDirect staff

    These answers to common questions can help you make the most of your treadmill.