Model # 770 Official MTD lawn tractor
Here are the diagrams and repair parts for Official MTD 770 lawn tractor, as well as links to manuals and error code tables, if available.
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Model diagram and schematic
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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: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun...
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: punctured tire or inner tube, leaky valve stem, damaged wheel rim...
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: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components...
Main causes: shift lever needs adjustment, neutral control needs adjustment...
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, ...
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 seat switch on a riding lawn mower
Follow the steps in this guide to install a new riding mower seat switch in about 15 minutes....
How to replace a riding lawn mower spark plug
If the engine is hard to start or if the spark plug electrode is burnt or cracked, take 15 minutes to replace it....
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....
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.
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Check the starter solenoid, starter motor, wiring, battery and engine....