DP
Treadmill

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.

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Model diagram and schematic

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Showing 10 of 88 parts  |

5/16 Locknut 25009800
5/16 locknut

Part #25009800

The manufacturer no longer makes this part, and there's no substitute part

Bolt 22009900
#119

Motor and walking belt assembly diagram

Bolt

Part #22009900

The manufacturer no longer makes this part, and there's no substitute part

Side Rail Rh 38176616
Side rail rh

Part #38176616

The manufacturer no longer makes this part, and there's no substitute part

Motor 37020500
#140

Motor and walking belt assembly diagram

Motor

Part #37020500

The manufacturer no longer makes this part, and there's no substitute part

Mtr Mount 38215710
#134

Motor and walking belt assembly diagram

Mtr mount

Part #38215710

The manufacturer no longer makes this part, and there's no substitute part

Side Rail 2h 38176916
Side rail 2h

Part #38176916

The manufacturer no longer makes this part, and there's no substitute part

Switch Bracket 31176910
#152

Motor and walking belt assembly diagram

Switch bracket

Part #31176910

The manufacturer no longer makes this part, and there's no substitute part

Bearing 09058400
#131

Motor and walking belt assembly diagram

Bearing

Part #09058400

The manufacturer no longer makes this part, and there's no substitute part

Elec Console 37021000
Elec console

Part #37021000

The manufacturer no longer makes this part, and there's no substitute part

Grommet 09084600
#112

Control panel diagram

Grommet

Part #09084600

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

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

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

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.

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…