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Treadmill

Model # PFTL78574 Official Proform proform 785 treadmill

Here are the diagrams and repair parts for Official Proform PFTL78574 proform 785 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 137 parts  |
Treadmill Safety Key (replaces 125589, 153017) 119038

#88

All parts diagram

Treadmill safety key (replaces 125589, 153017)

Part #119038

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This item is not returnable
$3.14 | 
24% OFF Phone Price : $4.14
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Black & Decker Treadmill Power Cord (replaces 031033, 031143, 031147, 247991) 031229

#36

All parts diagram

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

Part #031229

$11.39 | 
15% OFF Phone Price : $13.39
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Weider Exercise Equipment Optic Sensor 102955

#30

All parts diagram

Weider exercise equipment optic sensor

Part #102955

This item is not returnable
$9.29 | 
10% OFF Phone Price : $10.29
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Black & Decker Treadmill Washer 014063

#51

All parts diagram

Black & decker treadmill washer

Part #014063

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
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Healthrider Treadmill Front Roller And Pulley 141760

#18

All parts diagram

Healthrider treadmill front roller and pulley

Part #141760

$64.99
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Exercise Equipment Rubber Pad 126650

#96

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Exercise equipment rubber pad

Part #126650

This item is not returnable
$2.16
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Weider Treadmill Pan Fastener 138853

#57

All parts diagram

Weider treadmill pan fastener

Part #138853

This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Nut 012149

#43

All parts diagram

Black & decker exercise equipment nut

Part #012149

This item is not returnable
$2.16
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Image Exercise Equipment Nut 119439

#13

All parts diagram

Image exercise equipment nut

Part #119439

This item is not returnable
$2.16
In Stock
Lifestyler Spcr,bumpon, 019173

#NI

All parts diagram

Lifestyler spcr,bumpon,

Part #019173

This item is not returnable
$2.16
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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…

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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'…

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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…

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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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