Troubleshooting
2Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Engine Will Not Crank | Check battery voltage. Is battery voltage 12.4 volts or higher? Charge battery and perform a no-load test. Is battery voltage 12.4 volts or higher? • Battery defective Does starter solenoid click when ignition switch is turned to START position? • Fusible link open • Starter solenoid defective • Defective switches or wiring • Engine seized • Starter solenoid defective • Starter pinion gear sticking or damaged • Starter motor defective NO YES NO YES See Electrical Troubleshooting Repair or replace |
| Engine Cranks But Will Not Start | IMPORTANT: Perform a visual inspection first to determine if battery cables are tight and not corroded and if the battery is of sufficient size to turn the engine over at minimum cranking speed of 350 rpm. To test specific electrical components, see Electrical Section and refer to either Diagnostics or Tests & Adjustments for further guidance. • Battery defective Does fuel shutoff solenoid click when ignition switch is turned to START/RUN position? • Defective fuel shutoff solenoid • Defective switches or wiring Does engine have internal resistance? NOTE: Remove spark plugs and turn engine over by hand. Engine should rotate freely with little resistance. NO YES NO YES See Electrical Troubleshooting Repair or replace • Starter motor defective Does engine crank slow? YES NO • Piston rings or other internal components binding YES NO Is choke operating properly? Adjust YES Do spark plugs have a strong blue spark? NO YES • Defective spark plugs • Magneto kill circuit shorted to ground • Flywheel magnet weak • Ignition coil air gap not adjusted properly See Electrical Troubleshooting Are tappets adjusted properly? Adjust YES Is engine getting fuel? • Air cleaner plugged • Excessively rich fuel mixture • Water in fuel • Float needle stuck open YES NO • Not enough compression See Tests & Adjustments NO • Fuel shutoff valve closed • Fuel lines/vent plugged • Fuel pump defective • Insufficient engine vacuum |
Fault codes and symptom→remedy steps extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
Aftermarket parts that fit this tractor
60M127926 PartsGeek FridayParts $39.99 LT133 PartsGeek LT155 PartsGeek LT166 PartsGeek AM104405 PartsGeek FridayParts $65.70 CV15S PartsGeek 1438GS PartsGeek 1438HS PartsGeek 1538H PartsGeek 1538HS PartsGeek 1542GS PartsGeek 1546G PartsGeek 1642H PartsGeek 1642HS PartsGeek M125828 PartsGeek FridayParts $13.00 LT150 PartsGeek LT180 PartsGeek LT190 PartsGeek LTR166 PartsGeek LTR180 PartsGeek LX288 PartsGeek AM116299 PartsGeek AM133602 PartsGeek M111489 PartsGeek GT242 PartsGeek AM133627 PartsGeek LX173 PartsGeek GT225 PartsGeek LTR150 PartsGeek L110 PartsGeek M81463 PartsGeek FC420V PartsGeek FC540V PartsGeek GX70 PartsGeek GX85 PartsGeek SA329 PartsGeek SX75 PartsGeek S2348 PartsGeek SST15 PartsGeek SST18 PartsGeek AT75769 PartsGeek FridayParts $9.80 L120 PartsGeek L130 PartsGeek LA100 PartsGeek LA105 PartsGeek LA110 PartsGeek LA115 PartsGeek LA120 PartsGeek LA125 PartsGeek LA130 PartsGeek 155C PartsGeek F1145 PartsGeek F510 PartsGeek F525 PartsGeek F910 PartsGeek F911 PartsGeek F912 PartsGeek F915 PartsGeek F925 PartsGeek F930 PartsGeek
Parts listed by aftermarket suppliers as fitting this tractor — leads compiled from supplier catalogs; verify the exact part for your serial number.
Available documents
Service manual
About
John Deere LT133 — tractor. Specifications and parts compiled from manufacturer documents.