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DP 21-3900 treadmill Parts
Here are the diagrams and repair parts for DP 21-3900 treadmill, as well as links to manuals and error code tables, if available.
By Schematic
SELECT DIAGRAM
Browse Parts for 21-3900 Fitness & Exercise
Figure 2 diagram
Bolt
Part #22011200
The manufacturer no longer makes this part, and there's no substitute part
Figure 2 diagram
Washer
Part #26000100
The manufacturer no longer makes this part, and there's no substitute part
Lock Nut
Part #25011100
The manufacturer no longer makes this part, and there's no substitute part
Figure 1 diagram
Monitor
Part #37036800
The manufacturer no longer makes this part, and there's no substitute part
Figure 2 diagram
Rear Roller
Part #39311600
The manufacturer no longer makes this part, and there's no substitute part
Figure 2 diagram
Mtor Mnt Asm
Part #39337200
The manufacturer no longer makes this part, and there's no substitute part
Figure 2 diagram
Flywhl Pully
Part #39262900
The manufacturer no longer makes this part, and there's no substitute part
Screw
Part #20016000
The manufacturer no longer makes this part, and there's no substitute part
Figure 2 diagram
Side Rail
Part #09137600
The manufacturer no longer makes this part, and there's no substitute part
Figure 1 diagram
Bracket Assembly
Part #39344700
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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