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NordicTrack
Treadmill

Model # NTHK99901 Official NordicTrack adventure treadmill

Here are the diagrams and repair parts for Official NordicTrack NTHK99901 adventure treadmill, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Model diagram and schematic

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Showing 10 of 170 parts  |
Treadmill Walking Belt Alignment Tool (replaces 161927) 128457
#65

Frame diagram

Treadmill walking belt alignment tool (replaces 161927)

Part #128457

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
Back Order
Treadmill Circuit Breaker, 15-amp (replaces 031103, 127202, 173322) 109382
#39

Frame diagram

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

Part #109382

This item is not returnable
$9.39 | 
10% OFF Phone Price : $10.39
Back Order
Magnet,rnd,m 100498
#13

Frame diagram

Magnet,rnd,m

Part #100498

Replaced by #113842

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Manufacturer substitution
This part replaces 100498. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Reed Switch 157504
#87

Frame diagram

Black & decker exercise equipment reed switch

Part #157504

This item is not returnable
$10.99
In Stock
Handrail End Cap 131221
#86

Frame diagram

Handrail end cap

Part #131221

This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Screw 013438
#33

Frame diagram

Black & decker exercise equipment screw

Part #013438

This item is not returnable
$2.16
In Stock
Lifestyler Exercise Equipment Screw 013607
#118

Frame diagram

Lifestyler exercise equipment screw

Part #013607

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Black & Decker Clamp,8cabl 016057
#47

Frame diagram

Black & decker clamp,8cabl

Part #016057

This item is not returnable
$2.16
In Stock
Assy,rail,de 166535
#2

Frame diagram

Assy,rail,de

Part #166535

$43.99
In Stock
Compact Disc 225214

#NI

All parts diagram

Compact disc

Part #225214

$75.99
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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