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  |

Deck 8009107
#5J

Main asy diagram

Deck

Part #8009107

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

Upright Le 8009079
#9

Main asy diagram

Upright le

Part #8009079

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

Shroud-bas 8009252
#7

Main asy diagram

Shroud-bas

Part #8009252

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

Svc Kit,mt 8006012
#NI

Main asy diagram

Svc kit,mt

Part #8006012

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

Upper Cable 8011991
#NI

Main asy diagram

Upper cable

Part #8011991

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

Tray-cross 8010343
#11

Main asy diagram

Tray-cross

Part #8010343

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

Adjustable Foot 8005139
#NI

Main asy diagram

Adjustable foot

Part #8005139

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

Power Box Trim Motor Cover 8004478
#NI

Main asy diagram

Power box trim motor cover

Part #8004478

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: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor...

Main causes: damaged walking belt, improper belt tension, bad roller bearing...

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: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co...

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 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
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...

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.

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....