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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
Steering wheel diagram
Spacer
Part #750-0535Replaced by #950-0535
Manufacturer substitutionThis part replaces 750-0535. Substitute parts can look different from the original.This item is not returnableIn Stock$8.20
Qty
Brake assembly diagram
Thrust Washer
Part #736-0519Replaced by #936-0519
Manufacturer substitutionThis part replaces 736-0519. Substitute parts can look different from the original.This item is not returnableIn Stock$9.34QtyTire
Part #734-1731Replaced by #734-3186A
Manufacturer substitutionThis part replaces 734-1731. Substitute parts can look different from the original.In Stock$63.98QtyTransaxle diagram
Brake Spring
Part #732-0722AReplaced by #932-0722A
Manufacturer substitutionThis part replaces 732-0722A. Substitute parts can look different from the original.In Stock$19.40QtySteering wheel diagram
Steering Wheel
Part #631-04008Replaced by #631-04008B
Manufacturer substitutionThis part replaces 631-04008. Substitute parts can look different from the original.In Stock$73.7332% OFF Was : $107.67
QtyHood 660/665/680/685 diagram
Headlight Lens
Part #731-1099AReplaced by #931-1099A
Manufacturer substitutionThis part replaces 731-1099A. Substitute parts can look different from the original.In Stock$132.788% OFF Phone Price : $144.78QtySpindle assembly diagram
Chute Asm-co
Part #731-1032BReplaced by #631-05229
Manufacturer substitutionThis part replaces 731-1032B. Substitute parts can look different from the original.In Stock$108.8610% OFF Phone Price : $120.86QtyFoot Pad
Part #735-0196Replaced by #735-0239A
Manufacturer substitutionThis part replaces 735-0196. Substitute parts can look different from the original.In Stock$22.3721% OFF Phone Price : $28.37QtyTransmission diagram
Pin
Part #714-0209Replaced by #914-0209
Manufacturer substitutionThis part replaces 714-0209. Substitute parts can look different from the original.This item is not returnableIn Stock$29.84QtyBlades diagram
Extension Spring
Part #732-0594AReplaced by #932-0594A
Manufacturer substitutionThis part replaces 732-0594A. Substitute parts can look different from the original.In Stock$23.0221% OFF Phone Price : $29.02Qty
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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