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Horizon QUANTUM II treadmill Parts
Here are the diagrams and repair parts for Horizon QUANTUM II treadmill, as well as links to manuals and error code tables, if available.
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Browse Parts for QUANTUM II Fitness & Exercise
Treadmill assembly diagram
Fxng Plate
Part #SP0028002A
The manufacturer no longer makes this part, and there's no substitute part
#NI04
All parts diagram
T-wrench
Part #MZE1002003
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
Pad
Part #MB0606002
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
Control Board
Part #MC0202052C
The manufacturer no longer makes this part, and there's no substitute part
#NI05
All parts diagram
End Cap
Part #MB0609040
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
C-clip
Part #MZE0902001
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
Base Frame
Part #SP0021003A
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
End Cap
Part #MB0238004D
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
Bolt
Part #MZE0102091
The manufacturer no longer makes this part, and there's no substitute part
Treadmill assembly diagram
Sleeve
Part #MJ3021002A
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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