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Craftsman LT2500 Troubleshooting
The
Craftsman LT2500 is a 2-wheel drive lawn tractor. This model was manufactured by
MTD built between 2013 and 2019. The Craftsman LT2500 driveline system
components: Kohler Courage SV620 four-cycle single cylinder air-cooled gasoline
engine and MTD 918-04892B belt-driven hydrostatic transmission with infinite
forward and reverse gears.
A 36.4 cubic inches (597 cc) engine has a cylinder bore of 3.70" (94
mm), piston stroke of 3.38" (86 mm), and rated power of 22 hp (16.4 kW).
Max. travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 2.8 mph (4.3
km/h).
The tractor was equipped with 15x6.00-6 front tires and 20x8.00-8 rear
tires. The wheel base is 35 in (880 mm). The Craftsman LT2500 lawn
tractor can be equipped with a 46" mid-mount 2-blade mower deck with
cutting height of 1.5-4.0 in (37-100 mm) and manual lifting system.
| Engine Troubleshooting |
| Engine doesn't start or starts hard |
| Gas tank is empty - Fill fuel up |
| Incorrect fuel grade - Change gasoline |
| Air in the fuel system - Air bleeding |
| Defective wiring connection of spark plug - Check the spark plug wire connection, repair or replace |
| Damaged spark plug - Change spark plug |
| Clogged fuel filter - Change fuel filter |
| Brake pedal not depressed - Press the brake pedal |
| Carburetor problems - Carburetor diagnostics required |
| Poor cylinder compression - Check cylinder block and change worn parts |
| Damaged or not adjusted choke cable - Adjust properly or replace the cable |
| Engine runs intermittently |
| Air intake grill is clogged - Wash or clean as required |
| Defective ignition system - Check ignition and replace faulty components |
| Choke cable is faulty or stuck - Service or replace the cable |
| Plugged air filter - Service or change air filter |
| Dirty or damaged fuel pump - Test fuel pump and change if necessary |
| Engine starts but then stops |
| Defective spark plug - Change spark plug as required |
| Dirty or defective carburetor - Service or replace carburetor |
| Damaged ignition coil - Replace ignition coil as necessary |
| Valve springs are damaged or weak - New valve springs need to be installed |
| Stuck valves - Service the valves |
| Engine oil insufficient - Add oil to the engine crankcase |
| Engine is running overloaded - Load reducing required |
| Cooling fins are plugged - Wash or clean as required |
| Carburetor fuel mixture is too lean - Adjust carburetor properly |
| Ignition timing is improper - Adjust ignition timing correctly |
| Improper valve setting - Adjust valves as required |
| Abnormal engine noise or knocking |
| Stale or low octane fuel - Use correct gasoline |
| Excessive engine load - Load reducing required |
| Insufficient engine oil - Need to add engine oil |
| Wrong adjustment of low idle speed - Adjustment required |
| Fuel pump is defective or dirty - Inspect fuel pump and change as required |
| Main bearings or crankshaft failure - Need to install new components |
| Excessive valve clearance - Check and adjust |
| Damaged cylinder bore or piston rings - Replace defective parts |
| Carburetor is improperly adjusted or clogged - Adjust the carburetor properly or clean it |
| Clogged air filter - Service or replace air filter |
| Dirty or damaged fuel pump - Clean or install new fuel pump |
| Ignition system failure - Check ignition and replace faulty components |
| Defective cylinder head gasket - Replace cylinder head gasket |
| Stuck or burned valves - Replace or service valves |
| Push rod is bent or worn - Change push rod |
| Damaged cylinder block components - Defective components need to be replaced |
| Excessive fuel consumption |
| Throttle opening is not full - Adjust or change throttle cable |
| Carburetor main jet is incorrectly adjusted - Adjust it correctly |
| Spark plug is faulty or loose - Re-tighten or replace spark plug |
| Valves are stuck, worn, or burned - Service or replace valves |
| Piston, sleeve, or rings are damaged - Replace faulty parts |
| Valve clearance is not correct - Adjust valve clearance according to specifications |
| High engine oil consumption |
| Seals or gaskets are defective - To repair leaks, replace worn parts |
| Valve guides and stems are worn - Need to replace the valves |
| Stuck or worn piston rings - Install new piston rings |
| Damaged piston or cylinder liner - Inspect piston and liner, replace as required |
| Blocked breather pipe or hose - Service or replace |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Loose or broken gear shift linkage - Change defective shift linkage |
| Shift forks are damaged or worn - Replace defective shift forks |
| Defective parts in the gearshift mechanism - Replace defective parts |
| Transmission is excessively noisy |
| Fluid level is low - Check and refill the transmission fluid |
| Transmission oil is dirty - Transmission oil change required |
| Bearings or gears are worn - Change gears or bearings |
| Transmission pops out of gear |
| Incorrectly installed or bent shift lever - Install the lever properly or replace it |
| Worn or damaged gear teeth - Install new gears |
| Worn shift rods or shift forks - Replace defective forks or rods |
| Drive belt/shaft is incorrectly adjusted or defective - Adjust or replace belt/shaft |
| Clutch/brake is incorrectly adjusted or defective - Adjust clutch/brake or install a new one |
| Worn or defective drive pulley - Replace pulley |
| Hydrostatic Transmission Troubleshooting |
| HST transmission is making noise |
| Speed control pedal linkage is damaged or out of adjustment - Adjust or replace linkage |
| Transmission overload - Reduce transmission load |
| Transmission oil is contaminated or oil level is insufficient - Change transmission oil or top up to proper level |
| Damaged or worn components of hydrostatic transmission - Check internal transmission parts for damage or wear and replace if required |
| Shift linkage is stuck or damaged - Clean or change linkage |
| Hydrostatic pump is blocked or defective - Repair or change pump |
| Unadjusted or damaged transmission shift control parts - Change or adjust correctly |
| Lack of transmission fluid - Add fluid to the transmission housing |
| Drive sheave is defective or worn - Install a new sheave |
| Misadjusted or faulty shifting linkage - Change or adjust linkage |
| Defective or not adjusted speed control pedal linkage - Adjust or replace linkage |
| Broken transmission gaskets or seals - Replace seals or gaskets |
| Final drive shaft is leaking - Shaft seals need to be changed |
| Cracked transmission case - Change broken case |
| Mower Deck Troubleshooting |
| Excessive mower vibration |
| Dirty or worn mower drive sheave - Service or replace sheave |
| Damaged or loose drive belt - Adjust belt tension or change the belt |
| Bent or unbalanced cutting blades - Balance or change blades |
| Loose blade mounting bolts - Tighten it fast |
| Discharge chute is constantly plugged |
| High ground speed - Select a slower speed |
| Long grass - Need to set low cutting height |
| Engine runs at low revs - Adjust choke to full opening |
| Mower cuts too low - Need to set high cutting height |
| Mower drive belt installation is improper - Drive belt must be installed correctly |
| Clogged mower deck - Inspect and clean cutting deck |
| Blades are too dull - Need a blade sharpening |
| Worn or defective blades - Blades need to be replaced |
| High mowing speed - Use a lower speed |
| Low cutting height - Use correct cutting height |
| Full grass bag - Grass bag must be empty |
| Blades are scalping the grass |
| Lawn is bumpy or not smooth - Level the lawn |
| Mower deck cutting height is set too low - Need to set high cutting height |
| High ground speed - Operate at slower speed |
| Improper mower deck level - Deck should be adjusted correctly |
| Bent or worn blades - Blades must be changed |
| Incorrect tire pressure - Correct tire pressure |
| Low tire inflation - Check and inflate the tires |
| Mower deck is not leveled properly - Adjust the level of mower deck correctly |
| Blades are not sharp - Need a blade sharpening |
| Worn or bent blades - Blades must be changed |
| Cutting deck is clogged - Clean out the mower deck |
| Deck shell is broken - Repair or replace the deck |
| Mower spindle is bent or loose - Repair or change the spindle |
| Electrical Troubleshooting |
| Battery won’t charge |
| Wiring connections are corroded or loose - Tighten or service connections |
| Faulty battery terminal clamps - Install new terminal clamps |
| Dead cell in battery - Battery change required |
| Low battery capacity - Low battery charging, charge as required |
| Battery discharges quickly - Service or replace the battery |
| Bad battery terminals or disconnected wiring - Check wiring and clean or replace terminals |
| Battery is discharged or worn - Charge or change the battery |
| Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly |
| Low battery output voltage - Charge the battery |
| Spark plug faulty or incorrectly gapped - Clean and gap or replace |
| Solenoid or starter motor is faulty - Repair starter or change solenoid |
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| Lawn and Garden Tractors Technical Specs |
