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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
Washer
Part #19252016Replaced by #532121749
Manufacturer substitutionThis part replaces 19252016. Substitute parts can look different from the original.This item is not returnableIn Stock$3.3623% OFF Phone Price : $4.36
Qty
Main frame diagram
Lock Washer
Part #10040600Replaced by #596238701
Manufacturer substitutionThis part replaces 10040600. Substitute parts can look different from the original.This item is not returnableIn Stock$4.7317% OFF Phone Price : $5.73QtyMain frame diagram
Tire
Part #6032HReplaced by #532122075
Manufacturer substitutionThis part replaces 6032H. Substitute parts can look different from the original.In Stock$69.878% OFF Phone Price : $75.87QtyMain frame diagram
Washer
Part #19131316Replaced by #819131316
Manufacturer substitutionThis part replaces 19131316. Substitute parts can look different from the original.This item is not returnableIn Stock$27.3618% OFF Phone Price : $33.36QtyMain frame diagram
Lock Washer
Part #10040500Replaced by #596238801
Manufacturer substitutionThis part replaces 10040500. Substitute parts can look different from the original.This item is not returnableIn Stock$25.7319% OFF Phone Price : $31.73QtyTransmission diagram
Differential Carrier
Part #774028Replaced by #774028A
Manufacturer substitutionThis part replaces 774028. Substitute parts can look different from the original.In Stock$87.93QtyMain frame diagram
Foot Pedal
Part #4382HReplaced by #510089501
Manufacturer substitutionThis part replaces 4382H. Substitute parts can look different from the original.In Stock$12.5814% OFF Phone Price : $14.58QtyTransmission diagram
Gear
Part #778019Replaced by #778019A
Manufacturer substitutionThis part replaces 778019. Substitute parts can look different from the original.In Stock$55.80QtyTransmission diagram
Bearing
Part #780055Replaced by #780055
Manufacturer substitutionThis part replaces 780055. Substitute parts can look different from the original.In Stock$24.51QtyTransmission diagram
Axle Rh
Part #774045Replaced by #774068
Manufacturer substitutionThis part replaces 774045. Substitute parts can look different from the original.In Stock$95.40Qty
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
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
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
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.
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
Learn some of the most common symbols found in a wiring diagram and what they mean.…
Learn how to connect cables safely to jump-start your mower’s battery.…
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