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Model # 9178400 Official Craftsman heavy-duty riding unit
Here are the diagrams and repair parts for Official Craftsman 9178400 heavy-duty riding unit, as well as links to manuals and error code tables, if available.
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9178400 Riding Mowers & Tractors
E-ring
Part #98000071
Replaced by #812000029
?
Manufacturer substitution
This part replaces 98000071. Substitute parts can look different from the original.
This item is not returnable
$4.51 |
18% OFF Phone Price : $5.51
In Stock
Washer
Part #19252016
Replaced by #532121749
?
Manufacturer substitution
This part replaces 19252016. Substitute parts can look different from the original.
This item is not returnable
$4.31 |
19% OFF Phone Price : $5.31
In Stock
#60
Transaxle diagram
Seal
Part #788009
Replaced by #788009
?
Manufacturer substitution
This part replaces 788009. Substitute parts can look different from the original.
$11.60
In Stock
#49
Transaxle diagram
Screw
Part #792007
Replaced by #792007
?
Manufacturer substitution
This part replaces 792007. Substitute parts can look different from the original.
This item is not returnable
$4.37
In Stock
#29
Transaxle diagram
Shifter stop
Part #784074
Replaced by #784074
?
Manufacturer substitution
This part replaces 784074. Substitute parts can look different from the original.
$15.29
In Stock
#40
Transaxle diagram
Spur
Part #778024
Replaced by #778024A
?
Manufacturer substitution
This part replaces 778024. Substitute parts can look different from the original.
$26.29
In Stock
#15A
Transaxle diagram
Axle rh
Part #774045
Replaced by #774068
?
Manufacturer substitution
This part replaces 774045. Substitute parts can look different from the original.
$95.40
In Stock
#41
Transaxle diagram
Washer
Part #780001
Replaced by #780001
?
Manufacturer substitution
This part replaces 780001. Substitute parts can look different from the original.
This item is not returnable
$4.34
In Stock
#10
Transaxle diagram
Ball
Part #792004
Replaced by #792004
?
Manufacturer substitution
This part replaces 792004. Substitute parts can look different from the original.
This item is not returnable
$4.37
In Stock
#46A
Transaxle diagram
Housing assembly
Part #782023
Replaced by #782023A
?
Manufacturer substitution
This part replaces 782023. Substitute parts can look different from the original.
$129.40
In Stock
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: punctured tire or inner tube, leaky valve stem, damaged wheel rim…
Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …
Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, …
Main causes: shift lever needs adjustment, neutral control needs adjustment…
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…
Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components…
Main causes: faulty battery, bad alternator…
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 a riding lawn mower rear tire
Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…
Repair difficulty
Time required
60 minutes or less
How to replace a riding lawn mower blade
If a blade on your mower is dull or bent, replace it following the steps in this repair guide.…
Repair difficulty
Time required
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 difficulty
Time required
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.
Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
Check the starter solenoid, starter motor, wiring, battery and engine.…