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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.
Owner’s manualBy Schematic
SELECT DIAGRAM
Browse Parts for
T618 Fitness & Exercise
#NI
Main asy diagram
Weldment-t
Part #8010053
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Tube-shock
Part #8009225
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Belt guide
Part #8005326
The manufacturer no longer makes this part, and there's no substitute part
#5E
Main asy diagram
Shroud
Part #8009262
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Steel cabl
Part #8009221
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Wheel
Part #8005405
The manufacturer no longer makes this part, and there's no substitute part
#9
Main asy diagram
Upright le
Part #8009079
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Document k
Part #8009251
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Weldment
Part #8009222
The manufacturer no longer makes this part, and there's no substitute part
#NI
Main asy diagram
Power inlet
Part #8004776
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
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
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
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.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…