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MTD 13AL78ST099 tractor Parts
Here are the diagrams and repair parts for MTD 13AL78ST099 tractor, as well as links to manuals and error code tables, if available.
Owner’s manual
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Browse Parts for13AL78ST099 Riding Mowers & Tractors
Seat/fender diagram
Mounting Seat Bracket
Part #783-06840Replaced by #783-06840-0637
Manufacturer substitutionThis part replaces 783-06840. Substitute parts can look different from the original.In Stock$55.9910% OFF Phone Price : $61.99
Qty
Seat/fender diagram
Lawn Tractor Seat
Part #757-04145Replaced by #757-05236
Manufacturer substitutionThis part replaces 757-04145. Substitute parts can look different from the original.In Stock$314.96$12.00 OFF Phone Price : $326.96Qty331877-0869-g5 engine diagram
Muffler
Part #751-10448CReplaced by #951-05956B
Manufacturer substitutionThis part replaces 751-10448C. Substitute parts can look different from the original.In Stock$186.81Qty331877-0869-g5 engine diagram
Muffler Shield Assembly
Part #683-04549-0637Replaced by #683-05460A-0637
Manufacturer substitutionThis part replaces 683-04549-0637. Substitute parts can look different from the original.In Stock$116.749% OFF Phone Price : $128.74QtyTransmission diagram
Auto-drive Bracket Assembly
Part #683-04606Replaced by #783-06568A
Manufacturer substitutionThis part replaces 683-04606. Substitute parts can look different from the original.In Stock$57.94QtySteering/wheel diagram
Wheel Assembly
Part #634-04639-0961Replaced by #634-05067-0961
Manufacturer substitutionThis part replaces 634-04639-0961. Substitute parts can look different from the original.In Stock$104.3410% OFF Phone Price : $116.34QtyTransmission diagram
Lawn & Garden Equipment Flat Washer
Part #936-0185Replaced by #736-0185
Manufacturer substitutionThis part replaces 936-0185. Substitute parts can look different from the original.In Stock$35.14QtyTransmission diagram
Lawn & Garden Equipment Lock Nut
Part #912-3000Replaced by #712-3000
Manufacturer substitutionThis part replaces 912-3000. Substitute parts can look different from the original.In Stock$29.61QtyTransmission diagram
Lawn Mower Lever
Part #647-04266Replaced by #647-04266B
Manufacturer substitutionThis part replaces 647-04266. Substitute parts can look different from the original.In Stock$34.84QtySteering/wheel diagram
Steering Block
Part #748-04065-0637Replaced by #748-04278
Manufacturer substitutionThis part replaces 748-04065-0637. Substitute parts can look different from the original.In Stock$34.1115% OFF Phone Price : $40.11Qty
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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
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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