Nautilus
Treadmill

Model # T618 Official Nautilus t618 treadmill

Here are the diagrams and repair parts for Official Nautilus T618 t618 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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Showing 10 of 62 parts  |

Console 8009317
#1

Main asy diagram

Console

Part #8009317

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

Treadmill Safety Key 8006259
#14

Main asy diagram

Treadmill safety key

Part #8006259

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

Mcba 8009112
#NI

Main asy diagram

Mcba

Part #8009112

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

Treadmill Wire Harness, Lower 8011992
#NI

Main asy diagram

Treadmill wire harness, lower

Part #8011992

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

Wheel Deck 8005218
#NI

Main asy diagram

Wheel deck

Part #8005218

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

Rear Rolle 8009212
#NI

Main asy diagram

Rear rolle

Part #8009212

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

Cable 8011990
#NI

Main asy diagram

Cable

Part #8011990

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

Tube-shock 8009225
#NI

Main asy diagram

Tube-shock

Part #8009225

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

Mtr Cover 8010052
#NI

Main asy diagram

Mtr cover

Part #8010052

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

Cover-junc 8009293
#NI

Main asy diagram

Cover-junc

Part #8009293

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.…