The Craftsman LT1500 is a 15.5 HP lawn tractor designed for residential mowing and light-duty towing. This service manual provides detailed instructions for maintenance, troubleshooting, and repair of the engine, transmission, cutting deck, electrical system, and chassis. Below are key sections covering safety, specifications, maintenance schedules, component service, and troubleshooting procedures.
Key components: 15.5 HP Briggs & Stratton engine, 6-speed manual transmission, 42-inch cutting deck, electric PTO clutch, manual blade engagement, adjustable cutting height, and tow hitch.
| Feature | Description |
|---|---|
| Engine | 15.5 HP Briggs & Stratton, single-cylinder, OHV |
| Transmission | 6-speed manual gear drive with reverse |
| Cutting Deck | 42-inch stamped steel, 3-blade system |
| PTO Clutch | Electric engagement for mower blades |
| Cutting Height | Adjustable from 1.5 to 4 inches in 0.5-inch increments |
| Fuel Tank | 2.5-gallon capacity |
| Tires | Front: 15x6.00-6, Rear: 20x10.00-8 |
| Seat | High-back with armrests |
| Battery | 12V, 280 CCA |
| Weight | Approximately 450 lbs |
Always follow safety guidelines to prevent injury or damage.
WARNING! Never operate mower without discharge chute or grass bag properly installed. Always remove key when not in use.
Regular maintenance ensures optimal performance and longevity.
| Interval | Service Task |
|---|---|
| Before each use | Check tire pressure, fuel level, and for loose parts |
| Every 8 hours | Check engine oil level |
| Every 25 hours | Change engine oil (first 5 hours for break-in) |
| Every 50 hours | Replace air filter, check spark plug |
| Every 100 hours | Replace spark plug, sharpen mower blades |
| Seasonally | Lubricate steering and deck linkages, check battery |
| End of season | Drain fuel or add stabilizer, clean deck, store properly |
Procedures for maintaining and repairing the Briggs & Stratton engine.
CAUTION! Always disconnect battery and spark plug before servicing engine components.
Service for manual transmission, belts, and drive components.
Maintenance for mower deck, blades, and PTO system.
WARNING! Always disconnect spark plug and PTO before working under deck.
Diagnosis and repair of wiring, battery, and switches.
| Component | Test Procedure |
|---|---|
| Battery | Check voltage (12.6V fully charged); load test if below 12V. |
| Starter | Listen for click; test solenoid with jumper wire. |
| Ignition Switch | Continuity test across terminals in each position. |
| Safety Switches | Check seat and PTO switches for continuity when engaged. |
| Charging System | Measure voltage at battery with engine running (13.5-14.5V). |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Dead battery, faulty spark plug, clogged fuel filter | Charge/replace battery; check spark; replace fuel filter. |
| Poor cutting performance | Dull blades, uneven deck, low engine RPM | Sharpen blades; level deck; adjust governor to 3600 RPM. |
| Excessive vibration | Unbalanced blade, loose pulley, damaged spindle | Balance or replace blade; tighten pulleys; inspect spindle bearings. |
| Transmission slips | Low fluid, worn drive belt, adjustment needed | Check fluid level; replace belt; adjust linkage. |
| Battery not charging | Faulty alternator, loose wiring, bad regulator | Test alternator output; secure connections; replace regulator. |
Refer to Craftsman part numbers for replacements. Common parts:
For full diagrams, visit www.searspartsdirect.com or contact authorized dealer.
Limited 2-year warranty for residential use. Contact Craftsman support for service inquiries.
Customer Support: 1-888-331-4569
Online Resources: www.craftsman.com/service
Service Centers: Locate via Sears or independent authorized dealers.