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Model # T4 Official Horizon treadmill
Here are the diagrams and repair parts for Official Horizon T4 treadmill, as well as links to manuals and error code tables, if available.
By Schematic
SELECT DIAGRAM
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T4 Fitness & Exercise
Nut
Part #MZE0204005
Replaced by #004926-00
?
Manufacturer substitution
This part replaces MZE0204005. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
#KIT
Treadmill diagram
T-wrench
Part #MZE1002003
Replaced by #005393-00
?
Manufacturer substitution
This part replaces MZE1002003. Substitute parts can look different from the original.
$8.50
In Stock
#M07
Treadmill diagram
Rubber pad
Part #MB0607001B
Replaced by #056374-AA
?
Manufacturer substitution
This part replaces MB0607001B. Substitute parts can look different from the original.
This item is not returnable
$5.66
In Stock
#P17
Treadmill diagram
Screw
Part #ME0102042
Replaced by #004381-00
?
Manufacturer substitution
This part replaces ME0102042. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
#R03
Treadmill diagram
Drive belt
Part #MD0602003
Replaced by #004158-00
?
Manufacturer substitution
This part replaces MD0602003. Substitute parts can look different from the original.
$58.57
In Stock
#R09
Treadmill diagram
Screw
Part #ME0104085
Replaced by #004488-00
?
Manufacturer substitution
This part replaces ME0104085. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
#KIT
Treadmill diagram
Spd sensor
Part #SSED080434DA
Replaced by #060295-DA
?
Manufacturer substitution
This part replaces SSED080434DA. Substitute parts can look different from the original.
$37.18
In Stock
#P13
Treadmill diagram
Screw
Part #MZE0103001
Replaced by #004415-Z
?
Manufacturer substitution
This part replaces MZE0103001. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
#B39
Treadmill diagram
Screw
Part #MZE0107023
Replaced by #004620-00
?
Manufacturer substitution
This part replaces MZE0107023. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
#H20
Treadmill diagram
Nylon nut
Part #ME0204025
Replaced by #004941-00
?
Manufacturer substitution
This part replaces ME0204025. Substitute parts can look different from the original.
This item is not returnable
$2.16
In Stock
Symptoms for treadmills
Choose a symptom to see related treadmill repairs.
Main causes: no power, bad power cord, tripped or faulty overload switch, bad power switch, wiring failure, bad motor co…
Main causes: rear roller out of alignment, damaged walking belt, bad roller…
Main causes: missing safety key, bad control console, wiring failure, faulty motor control board, bad drive motor…
Main causes: faulty sensors, wiring failure, bad control console…
Main causes: bad control console, wiring failure, bad motor control board…
Main causes: damaged walking belt, improper belt tension, lack of belt lubricant, bad drive motor…
Main causes: damaged walking belt, improper belt tension, bad roller bearing…
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 motor controller
Your treadmill motor won't run with a defective motor controller. Replace the motor controller if it doesn't operate the…
Repair difficulty
Time required
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 difficulty
Time required
45 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 difficulty
Time required
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.…