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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.
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Browse Parts for CST3.5 Fitness & Exercise
Treadmill assy diagram
Washer,spr
Part #MTK168112
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Spring
Part #MZE1117004D
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Screw
Part #MZE0104112
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Rail Cover
Part #MB0238024BA
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Bolt
Part #MZE0121003
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Deck
Part #MD0701051BA
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Screw
Part #MJ3022007B
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Nut
Part #ME0204030
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Roller Set
Part #SM0907031A
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assy diagram
Key
Part #MC0602233A
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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