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Horizon CST3.5 treadmill Parts
Here are the diagrams and repair parts for Horizon CST3.5 treadmill, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for CST3.5 Fitness & Exercise
Treadmill assy diagram
Washer
Part #MZE0502198A
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Bracket
Part #SP0026015AA
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Cover
Part #MB0236062AB
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Hook Cover
Part #MB0717003A
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Washer
Part #MZE0504014
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Switch
Part #MC0701002
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
End Cap
Part #MB0665027BA
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Link Arm
Part #SP0022013AC
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Screw
Part #MZE0107010
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Controller
Part #SZTM113MCB
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 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
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
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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