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Model # 374288660 Official Lifestyler treadmill
Here are the diagrams and repair parts for Official Lifestyler 374288660 treadmill, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for
374288660 Fitness & Exercise
#18
Figure 2 diagram
Mtr/mnt asm
Part #39332900
The manufacturer no longer makes this part, and there's no substitute part
#22
Figure 2 diagram
Front roller
Part #39330300
The manufacturer no longer makes this part, and there's no substitute part
#18D
Figure 2 diagram
Flywhl pully
Part #39262900
The manufacturer no longer makes this part, and there's no substitute part
#27A
Figure 2 diagram
Incl carr
Part #38320616
The manufacturer no longer makes this part, and there's no substitute part
#39
Figure 2 diagram
Bolt
Part #22011500
The manufacturer no longer makes this part, and there's no substitute part
#9
Figure 2 diagram
Handrail as
Part #39348800
The manufacturer no longer makes this part, and there's no substitute part
#12
Figure 2 diagram
Side rail
Part #09146400
The manufacturer no longer makes this part, and there's no substitute part
#11M
Figure 1 diagram
Nut #4
Part #25022800
The manufacturer no longer makes this part, and there's no substitute part
#23
Figure 2 diagram
Speed sensor
Part #37011100
The manufacturer no longer makes this part, and there's no substitute part
#29
Figure 1 diagram
Snap bushing
Part #09141900
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.…