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NordicTrack
Treadmill

Model # NTTL18905 Official NordicTrack apex 4100i treadmill

Here are the diagrams and repair parts for Official NordicTrack NTTL18905 apex 4100i 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 180 parts  |
Treadmill Safety Key Assembly 160695
Treadmill safety key assembly

Part #160695

This item is not returnable
$5.99
In Stock
Black & Decker Treadmill Washer 014063

#62

All parts diagram

Black & decker treadmill washer

Part #014063

This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Magnet,rnd,m 100498

#107

All parts 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
Back Order
Treadmill Screw 149442
Treadmill screw

Part #149442

This item is not returnable
$2.16
In Stock
Exercise Equipment Nut 012179

#77

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Exercise equipment nut

Part #012179

This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Reed Switch 157504

#20

All parts diagram

Black & decker exercise equipment reed switch

Part #157504

This item is not returnable
$10.99
In Stock
Treadmill Drive Motor 172833

#12

All parts diagram

Treadmill drive motor

Part #172833

$458.27
In Stock
Healthrider Lock Knob Spring 100076

#88

All parts diagram

Healthrider lock knob spring

Part #100076

This item is not returnable
$2.16
In Stock
Wire,jmpr,4" 109407

#NI07

All parts diagram

Wire,jmpr,4"

Part #109407

This item is not returnable
$2.16
In Stock
Black & Decker Exercise Equipment Screw 154848

#117

All parts diagram

Black & decker exercise equipment screw

Part #154848

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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