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Proform
Treadmill

Model # PFTL78571 Official Proform proform 785 treadmill

Here are the diagrams and repair parts for Official Proform PFTL78571 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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ALL PARTS
Showing 10 of 135 parts  |
Treadmill Safety Key (replaces 125589, 153017) 119038

#88

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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
In Stock
Treadmill Walking Belt Alignment Tool (replaces 161927) 128457

#99

All parts diagram

Treadmill walking belt alignment tool (replaces 161927)

Part #128457

This item is not returnable
$2.49 | 
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Treadmill Circuit Breaker, 15-amp (replaces 031103, 127202, 173322) 109382

#40

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Treadmill circuit breaker, 15-amp (replaces 031103, 127202, 173322)

Part #109382

This item is not returnable
$9.39 | 
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Treadmill Line Filter 130993

#41

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Treadmill line filter

Part #130993

$34.19 | 
15% OFF Phone Price : $40.19
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Belt 118017

#45

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Belt

Part #118017

Replaced by #220769

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Manufacturer substitution
This part replaces 118017. Substitute parts can look different from the original.
This item is not returnable
$15.29 | 
12% OFF Phone Price : $17.29
In Stock
Treadmill Incline Wheel 132314

#101

All parts diagram

Treadmill incline wheel

Part #132314

This item is not returnable
$2.16
In Stock
Screw,shldr 013307

#100

All parts diagram

Screw,shldr

Part #013307

This item is not returnable
$4.99
In Stock
#4 X 1/4" Screw 129101

#111

All parts diagram

#4 x 1/4" screw

Part #129101

This item is not returnable
$2.16
In Stock
Screw 102959

#31

All parts diagram

Screw

Part #102959

This item is not returnable
$2.16
In Stock
Proform Om,pftl78571 143251

#NI

All parts diagram

Proform om,pftl78571

Part #143251

This item is not returnable
$3.99
In Stock

Symptoms for treadmills

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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'…

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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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