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Speed Queen
Washer

Model # SWT420QA Official Speed Queen commercial washer

Here are the diagrams and repair parts for Official Speed Queen SWT420QA commercial washer, as well as links to manuals and error code tables, if available.

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  • In the search box below, enter all or part of the part number or the part’s name.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 176 parts  |
Washer Drain Pump 201566P
#17

Motor assy diagram

Washer drain pump

Part #201566P

$57.42
In Stock
Washer Drive Motor 38034P
#3

Motor assy diagram

Washer drive motor

Part #38034P

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

Washer Drive Block 39508P
#10

Agitator diagram

Washer drive block

Part #39508P

$50.82
In Stock
Washer Agitator Screw And O-ring 39432
#11

Agitator diagram

Washer agitator screw and o-ring

Part #39432

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

Screw 35369
Screw

Part #35369

This item is not returnable
$4.91
In Stock
Hose Clamp 36801
#14

Valve assy diagram

Hose clamp

Part #36801

This item is not returnable
$5.89
In Stock
Washer 37772
#28

Motor assy diagram

Washer

Part #37772

This item is not returnable
$2.16
In Stock
Washer Gear Case 38165P
#16

Transmission diagram

Washer gear case

Part #38165P

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

Screen 24122
#10

Valve assy diagram

Screen

Part #24122

Replaced by #24122

?
Manufacturer substitution
This part replaces 24122. Substitute parts can look different from the original.
$10.71
In Stock
Washer Brake Pad Kit 735P3
#3

Brake assy diagram

Washer brake pad kit

Part #735P3

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

Most common symptoms to help you fix your washers

Choose a symptom to see related washer repairs.

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Why your washing machine won't finish its cycle

Main causes: broken lid switch or lid lock, bad pressure switch, broken shifter assembly, faulty control system…

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Why doesn't my washing machine work at all?

Main causes: lack of electrical power, wiring failure, bad power cord, electronic control board failure, bad user interf…

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Why does my washing machine overfill?

Main causes: leaky water inlet valve, faulty water-level pressure switch, bad electronic control board…

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Why is the water in my washing machine the wrong temperature?

Main causes: water heater failure, bad water temperature switch, faulty control board, bad water valve, faulty water tem…

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Why won't my washing machine fill?

Main causes: no water supply, bad water valves, water-level pressure switch failure, control system failure, bad door lo…

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Why won't my washing machine agitate or spin?

Main causes: worn agitator dogs, bad clutch, broken motor coupler, shifter assembly failure, broken door lock, suspensio…

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Why is my washing machine noisy or shaking?

Main causes: unbalanced load, loose spanner nut, worn drive block, broken shock absorber or suspension spring, debris in…

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Why won't my washing machine drain?

Main causes: clogged drain hose, house drain clogged, bad drain pump, water-level pressure switch failure, bad control b…

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Why won't my washing machine start?

Main causes: bad lid switch or door lock, bad timer or electronic control board, wiring failure, bad water inlet valve a…

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Repair guides for top-mount refrigerators

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How to replace a refrigerator water valve

How to replace a refrigerator water valve

Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace the compressor run capacitor in a top-freezer refrigerator

How to replace the compressor run capacitor in a top-freezer refrigerator

The run capacitor sends electric current to the compressor motor to help the motor run efficiently. Replace the run capa…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace the defrost thermistor in a top-freezer refrigerator

How to replace the defrost thermistor in a top-freezer refrigerator

The defrost thermistor attaches to the evaporator coil and measures the evaporator coil temperature during defrost.…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your washers

Use the advice and tips in these articles and videos to get the most out of your washer.

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How to use your washing machine efficiently

How to use your washing machine efficiently

Find tips for using your washing machine efficiently to save energy and help reduce utility bills.…

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How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

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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.…

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