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  |

Fr Roller 8009123
#NI

Main asy diagram

Fr roller

Part #8009123

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

Cover-cons 8009296
#2

Main asy diagram

Cover-cons

Part #8009296

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

Deck Lift 8009216
#NI

Main asy diagram

Deck lift

Part #8009216

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

Hardware 8009265
#NI

Main asy diagram

Hardware

Part #8009265

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

Drop Deck 8010049
#NI

Main asy diagram

Drop deck

Part #8010049

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

Shroud-bas 8009253
#6

Main asy diagram

Shroud-bas

Part #8009253

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

Weldment-t 8009065
#5A

Main asy diagram

Weldment-t

Part #8009065

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

Shroud 8011998
#5H

Main asy diagram

Shroud

Part #8011998

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

Belt Guide 8005326
#NI

Main asy diagram

Belt guide

Part #8005326

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.…