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Ajay
Treadmill

Model # 400P Official Ajay treadmill

Here are the diagrams and repair parts for Official Ajay 400P 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 65 parts  |
Nut 92002

#14

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Nut

Part #92002

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

Nut 1411

#18

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Nut

Part #1411

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

Nut 57193

#13

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Nut

Part #57193

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

Nut 70106

#21

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Nut

Part #70106

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

Screw 90956

#3

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Screw

Part #90956

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

Handle Bar 100079

#7

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Handle bar

Part #100079

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

End Cover 97853

#30

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End cover

Part #97853

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

Ear Pulse 91448

#62

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Ear pulse

Part #91448

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

Bottom Cover 100133

#51

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Bottom cover

Part #100133

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

Speed Sensor 99788

#60

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Speed sensor

Part #99788

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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