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Model # 21-2850 Official DP ergometer treadmill
Here are the diagrams and repair parts for Official DP 21-2850 ergometer treadmill, as well as links to manuals and error code tables, if available.
By Schematic
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21-2850 Fitness & Exercise
Side rail rh
Part #38176616
The manufacturer no longer makes this part, and there's no substitute part
Side rail 2h
Part #38176916
The manufacturer no longer makes this part, and there's no substitute part
#134
Motor and walking belt assembly diagram
Mtr mount
Part #38215710
The manufacturer no longer makes this part, and there's no substitute part
#140
Motor and walking belt assembly diagram
Motor
Part #37020500
The manufacturer no longer makes this part, and there's no substitute part
Elec console
Part #37021000
The manufacturer no longer makes this part, and there's no substitute part
#7
Unit parts diagram
Grip
Part #04025700
The manufacturer no longer makes this part, and there's no substitute part
#175
Motor and walking belt assembly diagram
Hose clamp
Part #29091700
The manufacturer no longer makes this part, and there's no substitute part
#105
Control panel diagram
Handle bar
Part #39184300
The manufacturer no longer makes this part, and there's no substitute part
#137
Motor and walking belt assembly diagram
Cotter pin
Part #29058400
The manufacturer no longer makes this part, and there's no substitute part
#9
Unit parts diagram
Red key cvr
Part #29282000
The manufacturer no longer makes this part, and there's no substitute part
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.…