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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

  • Spacer for Craftsman 9178420 - Part 786017

    Transmission diagram

    Spacer

    Part #786017

    Replaced by #786017

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    Manufacturer substitution
    This part replaces 786017. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $4.46
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  • Drive Pin for Craftsman 9178420 - Part 792049

    Transmission diagram

    Roll Pin

    Part #792002

    Replaced by #792049

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    Manufacturer substitution
    This part replaces 792002. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $6.77
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  • Housing Bushing for Craftsman 9178420 - Part 782022A

    Transmission diagram

    Housing Assembly

    Part #782022

    Replaced by #782022A

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    Manufacturer substitution
    This part replaces 782022. Substitute parts can look different from the original.
    In Stock
    $140.40
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  • Lawn & Garden Equipment Screw for Craftsman 9178420 - Part 792020

    Transmission diagram

    Screw

    Part #792020

    Replaced by #792020

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    Manufacturer substitution
    This part replaces 792020. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $4.37
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  • Axle Rh for Craftsman 9178420 - Part 774068

    Transmission diagram

    Axle Rh

    Part #774045

    Replaced by #774068

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    Manufacturer substitution
    This part replaces 774045. Substitute parts can look different from the original.
    In Stock
    $95.40
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  • Husqvarna Mower Foot Pad for Craftsman 9178420 - Part 510089501

    Main frame diagram

    Foot Pedal

    Part #4382H

    Replaced by #510089501

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    Manufacturer substitution
    This part replaces 4382H. Substitute parts can look different from the original.
    In Stock
    $12.58
    14% OFF Phone Price : $14.58Info Icon
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  • Lawn & Garden Equipment Washer for Craftsman 9178420 - Part 780001

    Transmission diagram

    Washer

    Part #780001

    Replaced by #780001

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    Manufacturer substitution
    This part replaces 780001. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $4.34
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  • Ring Gear for Craftsman 9178420 - Part 778033A

    Transmission diagram

    Gear

    Part #778033

    Replaced by #778033A

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    Manufacturer substitution
    This part replaces 778033. Substitute parts can look different from the original.
    In Stock
    $119.52
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  • Drive Pin for Craftsman 9178420 - Part 786019

    Transmission diagram

    Pin

    Part #786019

    Replaced by #786019

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    Manufacturer substitution
    This part replaces 786019. Substitute parts can look different from the original.
    This item is not returnable
    In Stock
    $15.17
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  • Lawn Tractor Transaxle Spur Gear for Craftsman 9178420 - Part 778019A

    Transmission diagram

    Gear

    Part #778019

    Replaced by #778019A

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    Manufacturer substitution
    This part replaces 778019. Substitute parts can look different from the original.
    In Stock
    $55.80
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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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