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Craftsman 9178420 heavy-duty riding unit

Craftsman 9178420 heavy-duty riding unit Parts

Here are the diagrams and repair parts for Craftsman 9178420 heavy-duty riding unit, as well as links to manuals and error code tables, if available.

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Browse Parts for 9178420 Riding Mowers & Tractors

  • Brake Bracket for Craftsman 9178420 - Part 5409H

    Steering assembly diagram

    Brake Bracket

    Part #5409H

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

  • Bracket for Craftsman 9178420 - Part 4327H

    Main frame diagram

    Bracket

    Part #4327H

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

  • King Pin for Craftsman 9178420 - Part 615A18

    Main frame diagram

    King Pin

    Part #615A18

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

  • E-ring for Craftsman 9178420 - Part 98000074

    Steering assembly diagram

    E-ring

    Part #98000074

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

  • Nut for Craftsman 9178420 - Part 03220400

    Generator diagram

    Nut

    Part #03220400

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

  • Ring for Craftsman 9178420 - Part 792017

    Transmission diagram

    Ring

    Part #792017

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

  • Tire for Craftsman 9178420 - Part 6030H

    Main frame diagram

    Tire

    Part #6030H

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

  • Gear for Craftsman 9178420 - Part 778021

    Transmission diagram

    Gear

    Part #778021

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

  • Battery Cable for Craftsman 9178420 - Part 6121H1

    Generator diagram

    Battery Cable

    Part #6121H1

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

  • Strap for Craftsman 9178420 - Part 4340H

    Steering assembly diagram

    Strap

    Part #4340H

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

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Main causes: faulty battery, bad alternator…

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Most common repair guides to help fix your riding mowers & tractors

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

How to replace the starter solenoid on a riding lawn mower

How to replace the starter solenoid on a riding lawn mower

Replace the starter solenoid if it doesn't click when you turn the ignition key.…

Repair time and Difficulty

 30 minutes or less
How to replace a riding lawn mower ignition coil

How to replace a riding lawn mower ignition coil

If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…

Repair time and Difficulty

 30 minutes or less
How to replace a riding lawn mower fuel filter

How to replace a riding lawn mower fuel filter

Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…

Repair time and Difficulty

 15 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

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.…

Wiring schematic symbols explained video

Wiring schematic symbols explained video

Learn some of the most common symbols found in a wiring diagram and what they mean.…

Jump-starting a riding lawn mower battery video

Jump-starting a riding lawn mower battery video

Learn how to connect cables safely to jump-start your mower’s battery.…

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