Little Giant
Farming

Model # 581506/3-MDQ-SC Official Little Giant pump

Here are the diagrams and repair parts for Official Little Giant 581506-3-MDQ-SC pump, 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 31 parts  |

Volute 180079
#12

Replacement parts diagram

Volute

Part #180079

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

Shaft 180059
#6

Replacement parts diagram

Shaft

Part #180059

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

Ceramic Thrust Washer 921077
#9

Replacement parts diagram

Ceramic thrust washer

Part #921077

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

Adapter 180037
#2

Replacement parts diagram

Adapter

Part #180037

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

Shaft 180057
#6A

Replacement parts diagram

Shaft

Part #180057

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

Magnet Assembly 182602
#5A

Replacement parts diagram

Magnet assembly

Part #182602

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

Magnet 180602
#5

Replacement parts diagram

Magnet

Part #180602

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

Stud 911403
#8

Replacement parts diagram

Stud

Part #911403

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

Impeller 181144
#10B

Replacement parts diagram

Impeller

Part #181144

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

Impeller 182132
#10D

Replacement parts diagram

Impeller

Part #182132

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

Symptoms for gas walk-behind mowers

Choose a symptom to see related walk-behind mower repairs.

Main causes: drive control cable failure, worn or broken drive belt, bad transmission, broken drive wheel…

Main causes: engine needs tune up, dirty or clogged carburetor, damaged flywheel key…

Main causes: dirty carburetor, bad spark plug, clogged air filter, engine choke problems, clogged gas cap vent…

Main causes: damaged cutting blade, loose cutting blade, damaged flywheel key, engine needs tune up…

Main causes: stale gas, engine needs tune up, bad spark plug, dead battery, bad recoil starter, faulty safety switch, ba…

Main causes: uneven wheel height settings, damaged wheel, dull or damaged cutting blade…

Repair guides for gas walk-behind mowers

These step-by-step repair guides will help you safely fix what’s broken on your walk-behind lawn mower.

How to replace a lawn mower spark plug

How to replace a lawn mower spark plug

Take a few minutes to replace the spark plug during your lawn mower's annual tune-up or if the spark plug is burnt or cr…

Repair difficulty
Time required
 15 minutes or less
How to replace a lawn mower drive cable

How to replace a lawn mower drive cable

The drive cable engages the transmission to spin the drive wheels and move the mower across the grass. Replace the drive…

Repair difficulty
Time required
 60 minutes or less
How to replace a lawn mower starter rope

How to replace a lawn mower starter rope

These step-by-step instructions show how to replace a broken starter pull rope on a walk-behind lawn mower.…

Repair difficulty
Time required
 30 minutes or less

Articles and videos for gas walk-behind mowers

Use the advice and tips in these articles and videos to get the most out of your walk-behind lawn mower.

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.…

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.…

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Lawn mower won't start troubleshooting video: spark plug and ignition problems video

Find out how to test and fix problems with the spark plug, stop wire, ignition coil and flywheel.…