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Roadmaster
Treadmill

Model # 9896SR Official Roadmaster 3400 programmable treadmill

Here are the diagrams and repair parts for Official Roadmaster 9896SR 3400 programmable 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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ALL PARTS
Showing 10 of 74 parts  |
Hex Bolt HH0824T
Hex bolt

Part #HH0824T

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

Switch HH4514T
#24

Console and upright assembly diagram

Switch

Part #HH4514T

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

Nylon Lock Nut HH1256T
Nylon lock nut

Part #HH1256T

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

Decal FF0279T

#NI

All parts diagram

Decal

Part #FF0279T

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

Channel R 350087T
#68

Walking belt assembly diagram

Channel r

Part #350087T

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

Monitor QQ0021T
#22

Console and upright assembly diagram

Monitor

Part #QQ0021T

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

Motor Base 350157T
#60

Walking belt assembly diagram

Motor base

Part #350157T

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

Decal FF0274T

#NI

All parts diagram

Decal

Part #FF0274T

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

Crutch Tip MM0035T
#30

Walking belt assembly diagram

Crutch tip

Part #MM0035T

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

Safety Switch KK6081T

#NI

All parts diagram

Safety switch

Part #KK6081T

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

Symptoms for treadmills

Choose a symptom to see related treadmill repairs.

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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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