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Treadmill

Model # T912 Official Nautilus treadmill

Here are the diagrams and repair parts for Official Nautilus T912 treadmill, as well as links to manuals and error code tables, if available.

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Browse Parts forT912 Fitness & Exercise

  • Cover,mtr SM41108
    #32

    Covers assy diagram

    Cover,mtr

    Part #SM41108

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

  • Nautilus Treadmill Motor Control Board SM41094
    #20

    Motor asy diagram

    Nautilus treadmill motor control board

    Part #SM41094

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

  • Lock Washer SM41260
    #10

    Motor asy diagram

    Lock washer

    Part #SM41260

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

  • Speed Sensor Kit SM26407
    #30

    Motor asy diagram

    Speed sensor kit

    Part #SM26407

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

  • Screw  Selftapping SM27764
    #99

    Console assy diagram

    Screw selftapping

    Part #SM27764

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

  • Kit,siderail-r SM41517
    #67

    Rail assy diagram

    Kit,siderail-r

    Part #SM41517

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

  • Grommet SM41269
    #59

    Belt assy diagram

    Grommet

    Part #SM41269

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

  • Screw 3/8-16x5 SM41532
    #98

    Front 2 assy diagram

    Screw 3/8-16x5

    Part #SM41532

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

  • Extrusion,rub.s.rail-top SM41078
    #68

    Rail assy diagram

    Extrusion,rub.s.rail-top

    Part #SM41078

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

  • Ac Cord,rght Angle SM41197
    #NI

    Motor asy diagram

    Ac cord,rght angle

    Part #SM41197

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

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.…

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