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MTD 668 lawn tractor Parts
Here are the diagrams and repair parts for MTD 668 lawn tractor, as well as links to manuals and error code tables, if available.
Owner’s manualBy Schematic
By Part
SELECT DIAGRAM
Browse Parts for 668 Riding Mowers & Tractors
Transaxle diagram
Spring
Part #732-0369Replaced by #932-0369
Manufacturer substitutionThis part replaces 732-0369. Substitute parts can look different from the original.In Stock$18.51
Qty
Brake assembly diagram
Complete Spring
Part #732-0863Replaced by #932-05125
Manufacturer substitutionThis part replaces 732-0863. Substitute parts can look different from the original.This item is not returnableIn Stock$7.66QtyBrake assembly diagram
Sleeve Bearing
Part #741-0340Replaced by #741-05060
Manufacturer substitutionThis part replaces 741-0340. Substitute parts can look different from the original.This item is not returnableIn Stock$15.9211% OFF Phone Price : $17.92
QtySteering wheel diagram
Pivot Bar
Part #683-0002AReplaced by #753-0642-0637
Manufacturer substitutionThis part replaces 683-0002A. Substitute parts can look different from the original.In Stock$133.088% OFF Phone Price : $145.08QtyEngine diagram
Muffler Bracket
Part #783-0615CReplaced by #783-0615E-0637
Manufacturer substitutionThis part replaces 783-0615C. Substitute parts can look different from the original.In Stock$94.916% OFF Phone Price : $100.91QtyTransmission diagram
V-belt
Part #754-04002Replaced by #954-04002
Manufacturer substitutionThis part replaces 754-04002. Substitute parts can look different from the original.This item is not returnableGet free shipping with Automatic ReorderIn Stock$20.69QtySteering wheel diagram
Steering Shaft
Part #738-0919Replaced by #738-0919B
Manufacturer substitutionThis part replaces 738-0919. Substitute parts can look different from the original.In Stock$67.218% OFF Phone Price : $73.21QtySpindle assembly diagram
Skirt-42" De
Part #783-1146AReplaced by #753-0884
Manufacturer substitutionThis part replaces 783-1146A. Substitute parts can look different from the original.In Stock$150.58QtyEngine diagram
Exhaust Pipe
Part #751-0619AReplaced by #751-0619B
Manufacturer substitutionThis part replaces 751-0619A. Substitute parts can look different from the original.In Stock$92.376% OFF Phone Price : $98.37QtyTransaxle diagram
Lawn Tractor Wheel Assembly
Part #634-0104Replaced by #634Z0104-0637
Manufacturer substitutionThis part replaces 634-0104. Substitute parts can look different from the original.In Stock$224.04Qty
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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