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Model # 5.1T Official Horizon treadmill
Here are the diagrams and repair parts for Official Horizon 51T treadmill, as well as links to manuals and error code tables, if available.
There are a couple of ways to find the part or diagram you need:
- Click a diagram to see the parts shown on that diagram.
- In the search box below, enter all or part of the part number or the part’s name.
Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.
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For DIY troubleshooting advice and repair guides, visit our repair help section.
Model diagram and schematic
SEARCH WITHIN THIS MODEL
ALL PARTS
Showing 10 of 162 parts |
#P11
Treadmill diagram
Socket
Part #MC0703023
Replaced by #019749-A
?
Manufacturer substitution
This part replaces MC0703023. Substitute parts can look different from the original.
This item is not returnable
$9.62 |
9% OFF Phone Price : $10.62
In Stock
#KIT
Treadmill diagram
Bottle set
Part #MF0821002A
Replaced by #1000092805
?
Manufacturer substitution
This part replaces MF0821002A. Substitute parts can look different from the original.
This item is not returnable
$16.01 |
11% OFF Phone Price : $18.01
In Stock
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
#P02
Treadmill diagram
Switch
Part #MC0701002
Replaced by #003326-00
?
Manufacturer substitution
This part replaces MC0701002. Substitute parts can look different from the original.
$27.79 |
18% OFF Phone Price : $33.79
In Stock
#Q24
Treadmill diagram
End cap
Part #MB0609040
Replaced by #000920-00
?
Manufacturer substitution
This part replaces MB0609040. Substitute parts can look different from the original.
This item is not returnable
$2.80
In Stock
#M03
Treadmill diagram
Control motor
Part #SJED08011AA
Replaced by #013674-DG
?
Manufacturer substitution
This part replaces SJED08011AA. Substitute parts can look different from the original.
$416.00 |
$12.00 OFF Phone Price : $428.00
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.
$94.48
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
#P29
Treadmill diagram
Screw
Part #ME0102021
Replaced by #004364-00
?
Manufacturer substitution
This part replaces ME0102021. Substitute parts can look different from the original.
This item is not returnable
$2.52
In Stock
#P07
Treadmill diagram
Console cable
Part #MC0522013A
Replaced by #002424-A
?
Manufacturer substitution
This part replaces MC0522013A. Substitute parts can look different from the original.
$14.29
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.…