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DP 21-3900A treadmill Parts
Here are the diagrams and repair parts for DP 21-3900A treadmill, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for 21-3900A Fitness & Exercise
Control panel diagram
Console Assembly
Part #39344000
The manufacturer no longer makes this part, and there's no substitute part
#NI
All parts diagram
Owner's Manual
Part #60101100
The manufacturer no longer makes this part, and there's no substitute part
Cap Foot
Part #02007700
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
5/16 Locknut
Part #25009800
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Ear Clip
Part #37023700
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
J Bolt
Part #23018400
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Console Btm
Part #09134900
The manufacturer no longer makes this part, and there's no substitute part
Control panel diagram
Lock Nut
Part #25001500
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
Motor Mount
Part #38338610
The manufacturer no longer makes this part, and there's no substitute part
Motor and walking belt assembly diagram
R End Cover
Part #09118500
The manufacturer no longer makes this part, and there's no substitute part
Most common symptoms to help you fix your fitness & exercise
Choose a symptom to see related treadmill repairs.
Main causes: bad resistance motor, faulty control console, wiring failure…
Main causes: dead batteries, power supply failure, bad wiring connections, faulty control console…
Repair guides for treadmills
These step-by-step repair guides will help you safely fix what’s broken on your treadmill.
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…
Repair time and Difficulty
45 minutes or less
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…
Repair time and Difficulty
30 minutes or less
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'…
Repair time and Difficulty
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.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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