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Weslo
Treadmill

Model # WL840031 Official Weslo cadence 840 treadmill

Here are the diagrams and repair parts for Official Weslo WL840031 cadence 840 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 84 parts  |
Image Treadmill Safety Key Assembly 106337
#5

Cadence 840 treadmill diagram

Image treadmill safety key assembly

Part #106337

This item is not returnable
$6.59 | 
13% OFF Phone Price : $7.59
In Stock
Nut,hex Nyl 012082
#16

Cadence 840 treadmill diagram

Nut,hex nyl

Part #012082

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

Walking Belt Assembly 126255
#46

Cadence 840 treadmill diagram

Walking belt assembly

Part #126255

Replaced by #124882

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Manufacturer substitution
This part replaces 126255. Substitute parts can look different from the original.
$54.79 | 
10% OFF Phone Price : $60.79
In Stock
Guide,belt,l 109265
#41

Cadence 840 treadmill diagram

Guide,belt,l

Part #109265

Replaced by #198640

?
Manufacturer substitution
This part replaces 109265. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Exercise Equipment Bolt 103053
#56

Cadence 840 treadmill diagram

Exercise equipment bolt

Part #103053

This item is not returnable
$2.16
In Stock
Exercise Equipment Hex Nut 012108
#34

Cadence 840 treadmill diagram

Exercise equipment hex nut

Part #012108

This item is not returnable
$2.16
In Stock
Black & Decker Treadmill Power Cord (replaces 031033, 031143, 031147, 247991) 031229
#28

Cadence 840 treadmill diagram

Black & decker treadmill power cord (replaces 031033, 031143, 031147, 247991)

Part #031229

$11.39 | 
15% OFF Phone Price : $13.39
In Stock
Exercise Equipment Bolt 104581
#37

Cadence 840 treadmill diagram

Exercise equipment bolt

Part #104581

This item is not returnable
$2.16
In Stock
Weider Exercise Equipment Screw 112609
#32

Cadence 840 treadmill diagram

Weider exercise equipment screw

Part #112609

This item is not returnable
$2.16
In Stock
Cotter Pin,3 106334
#12

Cadence 840 treadmill diagram

Cotter pin,3

Part #106334

This item is not returnable
$2.16
In Stock

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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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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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 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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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…

Read more
Repair difficulty
Time required
 15 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
How to replace a treadmill walking board

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…

Read more
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.

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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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