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Model # 29653 Official Lifestyler 3400 programmable treadmill
Here are the diagrams and repair parts for Official Lifestyler 29653 3400 programmable treadmill, as well as links to manuals and error code tables, if available.
By Schematic
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29653 Fitness & Exercise
#24
Console and upright assembly diagram
Switch
Part #HH4514T
The manufacturer no longer makes this part, and there's no substitute part
#7
Walking belt assembly diagram
Arm assembly
Part #350094T
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Decla
Part #FF0280T
The manufacturer no longer makes this part, and there's no substitute part
#76
Console and upright assembly diagram
Elev pot
Part #AA0002T
The manufacturer no longer makes this part, and there's no substitute part
#9
Walking belt assembly diagram
Ny lock nut
Part #HH1753T
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Decal
Part #FF0276T
The manufacturer no longer makes this part, and there's no substitute part
#78
Console and upright assembly diagram
Tether
Part #KK6080T
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Decal
Part #FF0294T
The manufacturer no longer makes this part, and there's no substitute part
#39
Console and upright assembly diagram
Hex nut
Part #HH0765T
The manufacturer no longer makes this part, and there's no substitute part
#2
Console and upright assembly diagram
Hex bolt
Part #HH1306T
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
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
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
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.

Get answers to frequently asked questions about Sears and Sears PartsDirect.…