Here are the diagrams and repair parts for Official MTD 138-668-088 lawn tractor, as well as links to manuals and error code tables, if available.
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Part #710-0837
Single speed transaxle right hand diagram
Part #736-0188
Single speed transaxle right hand diagram
Part #710-0809
Choose a symptom to see related riding mower and lawn tractor repairs.
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…
Main causes: faulty battery, bad alternator…
Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…
Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…
Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…
Main causes: shift lever needs adjustment, neutral control needs adjustment…
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: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…
These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.
Your mower can’t run on a damaged rear tire. Here’s how to install a new one.…
If a blade on your mower is dull or bent, replace it following the steps in this repair guide.…
Help your mower run better by replacing the fuel filter during your riding mower's annual tune-up.…
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.…