Craftsman LT1000 Riding Mower Service Manual

The Craftsman LT1000 is a 17.5 HP, 42-inch deck riding lawn mower designed for residential use. This manual provides comprehensive service, maintenance, and troubleshooting information for owners and technicians. Below are key sections covering safety, specifications, maintenance schedules, engine service, drive system, electrical system, deck service, and troubleshooting procedures.

1. Features at a Glance 2. Safety Precautions 3. Specifications 4. Maintenance Schedule 5. Engine Service 6. Drive System & Transmission 7. Electrical System 8. Mower Deck Service 9. Troubleshooting 10. Parts List & Diagrams 11. Warranty Information

Features at a Glance

Key components: 17.5 HP Briggs & Stratton engine, 42-inch stamped steel cutting deck, 6-speed manual transmission, electric start, manual PTO engagement, adjustable cutting height, and comfortable high-back seat.

FeatureDescription
Engine17.5 HP Briggs & Stratton, single-cylinder, OHV
Cutting Width42 inches
Transmission6-speed manual gear drive
Starting SystemElectric key start with 12V battery
Fuel Capacity2.5 gallons
Cutting Height AdjustmentLever-actuated, 1.5 to 4 inches
Deck EngagementManual PTO lever
Tire Size (Front)15 x 6.00-6
Tire Size (Rear)20 x 10.00-8
SeatHigh-back, adjustable

Safety Precautions

Always follow safety guidelines to prevent injury or damage.

  1. Read manual thoroughly before operation or service.
  2. Operate only in clear, daylight conditions.
  3. Keep hands and feet away from moving parts.
  4. Disconnect spark plug wire before performing any maintenance.
  5. Use proper lifting equipment for heavy components.

WARNING! Gasoline is flammable; refuel in well-ventilated area with engine off and cool. Never smoke near fuel.

Specifications

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

IntervalService Task
Before each useCheck tire pressure, fuel level, deck for debris
Every 8 hoursCheck engine oil level
Every 25 hoursChange engine oil (first 5 hours for break-in)
Every 50 hoursReplace air filter, check spark plug
Every 100 hoursReplace spark plug, check drive belt tension
SeasonallySharpen blades, lubricate pivot points, check battery
StorageDrain fuel or add stabilizer, clean deck, charge battery

Engine Service

Procedures for basic engine maintenance and troubleshooting.

  1. Oil Change: Run engine to warm oil. Drain via plug under engine. Refill with 1.5 quarts of SAE 30 or 10W-30.
  2. Air Filter: Remove cover, clean or replace foam/pre-filter and paper element.
  3. Spark Plug: Gap at 0.030 inches. Replace if worn or fouled.
  4. Fuel System: Inspect fuel lines for cracks. Clean fuel filter annually.
  5. Carburetor Adjustment: Refer to engine manual for idle and mixture screws.

CAUTION! Engine components are hot after operation. Allow to cool before servicing.

Drive System & Transmission

Service procedures for transmission, belts, and linkages.

  1. Drive Belt Inspection: Check for cracks, fraying, or glazing. Replace if worn.
  2. Belt Replacement: Release tensioner, remove old belt, route new belt per diagram.
  3. Transmission Fluid: Check level via dipstick (if equipped). Change every 200 hours.
  4. Clutch Adjustment: Adjust pedal free play to 1 inch at midpoint.
  5. Brake Adjustment: Adjust brake rod nut for proper stopping distance.

Tip: Keep linkage points lubricated with grease to ensure smooth operation.

Electrical System

Battery, starting, and charging system service.

  1. Battery: Check terminals for corrosion. Maintain charge with trickle charger.
  2. Starting Circuit: Test solenoid if engine does not crank. Check key switch and safety interlocks.
  3. Charging System: Test voltage regulator output (approx. 13.5-14.5V at high idle).
  4. Fuses: Locate and test 20A fuse in wiring harness near battery.
  5. Headlights: Replace bulbs by removing lens cover.

WARNING! Disconnect battery negative terminal before performing electrical work.

Mower Deck Service

Blade sharpening, belt replacement, and deck leveling.

  1. Blade Removal: Block blade, use socket to remove retaining bolt (usually 5/8" or 15/16").
  2. Blade Sharpening: Sharpen at original angle. Balance blade before reinstalling.
  3. Deck Belt: Release idler tension, remove belt, install new belt per routing diagram.
  4. Deck Leveling: Place on flat surface. Adjust gauge wheels and lift links for even cut.
  5. Spindle Service: Grease zerks regularly. Replace bearings if noisy or loose.

CAUTION! Wear gloves when handling blades. Ensure deck is securely supported.

Troubleshooting

SymptomPossible CauseCorrective Action
Engine won't startDead battery, bad spark plug, clogged fuel filterCharge battery, replace spark plug, clean fuel filter
Engine runs poorlyDirty air filter, old gasoline, carburetor issueReplace air filter, drain old fuel, clean carburetor
Loss of powerClogged deck, dull blades, slipping drive beltClean deck, sharpen blades, adjust/replace belt
Uneven cuttingDeck not level, worn blades, low tire pressureLevel deck, replace blades, inflate tires
Excessive vibrationUnbalanced blade, loose spindle, damaged deckBalance blade, tighten spindle bolts, inspect deck
Transmission slipsLow fluid, worn belt, adjustment neededCheck fluid, replace belt, adjust linkage

Reset: For safety interlock issues, ensure all switches (seat, PTO, brake) are functioning.

Parts List & Diagrams

Refer to official Craftsman parts diagrams for replacement part numbers. Common parts include:

For complete parts breakdown, visit www.searspartsdirect.com or contact authorized service center.

Warranty Information

Craftsman LT1000 includes a limited warranty covering defects in materials and workmanship. Residential use: 2-year limited warranty. Commercial use: 90-day limited warranty. Proof of purchase required. Warranty does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact Sears Customer Service at 1-888-331-4569 or visit www.craftsman.com.

Service Support: 1-888-331-4569; www.craftsman.com

Craftsman LT1000 Riding Mower Service Manual © - All Rights Reserved 2025