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Lifestyler
Treadmill

Model # 374288900 Official Lifestyler treadmill

Here are the diagrams and repair parts for Official Lifestyler 374288900 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 76 parts  |
Assy,front R 39330900
#22

Figure 2 diagram

Assy,front r

Part #39330900

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

Rear Roller 39311600
#21

Figure 2 diagram

Rear roller

Part #39311600

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

Washer 26000100
#49

Figure 2 diagram

Washer

Part #26000100

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

Spd Cnt Knob 39215000
#11D

Figure 1 diagram

Spd cnt knob

Part #39215000

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

Treadbrd/cvr 39319300
#20

Figure 2 diagram

Treadbrd/cvr

Part #39319300

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

Tens Brkt 31279910
#31

Figure 2 diagram

Tens brkt

Part #31279910

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

Bolt 22011500
#42

Figure 1 diagram

Bolt

Part #22011500

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

Lock Nut 25011100
Lock nut

Part #25011100

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

Screw 20016000
Screw

Part #20016000

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

Front Support 38319816
#7

Figure 1 diagram

Front support

Part #38319816

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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Why won't my treadmill power up?

Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…

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Why is my treadmill's walking belt off center?

Main causes: rear roller out of alignment, damaged walking belt, bad roller…

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Why won't my treadmill start even though the console display works?

Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor…

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Why is my treadmill's heart rate sensor not accurate?

Main causes: faulty sensors, wiring failure, bad control console…

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Why does my treadmill have no display?

Main causes: bad control console, wiring failure, bad motor control board…

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Why does my treadmill's walking belt slow down?

Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor…

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Why is my treadmill's walking belt slipping?

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

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Repair guides for treadmills

These step-by-step repair guides will help you safely fix what’s broken on your treadmill.

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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…

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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…

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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'…

Read more
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.

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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.…

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