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Husqvarna LTH18542 Troubleshooting
The
Husqvarna LTH18542 is a 2WD lawn tractor. This model was manufactured by AYP
built from 2003 to 2004. The Husqvarna LTH18542 drivetrain system components:
Briggs and Stratton 31Q777 4-stroke single cylinder air-cooled gasoline engine,
and Hydro-Gear 322-0510 hydrostatic transaxle with foot-controlled variable
speed drive.
A 30.6 cu.in (501 cc) engine has a cylinder bore of 3.56" (90 mm),
piston stroke of 3.06" (78 mm), and max power of 18.5 hp (13.8 kW). The
maximum travel speed (forward/reverse): 5.2 mph (8.4 km/h) and 2.7 mph
(4.3 km/h).
The Husqvarna LTH18542 lawn tractor is equipped with a manual steering
system, disc brakes, 15x6.00-6 front tires, and 18x9.50-8 rear tires.
The tractor is compatible with a 42" mid-mount 2-blade side discharge
mower deck with cutting height of 1.5-4.0 in (38-102 mm), manual blade
engagement, six cut positions, and mechanical lifting system.
| Engine Troubleshooting |
| Engine hard to start or won't start |
| No fuel in fuel tank - Add gasoline |
| Incorrect fuel grade - Change fuel |
| Air in the fuel pipes - Bleed the fuel pipes |
| Spark plug wire is loose or disconnected - Check the spark plug wire connection, repair or replace |
| Defective spark plug - Change spark plug as required |
| Fuel filter is plugged - Fuel filter needs changing |
| Brake pedal not pushed down - Push the brake pedal down |
| Carburetor components worn out - Repair or replace parts |
| Poor engine compression - Check cylinder block and replace damaged components |
| Unadjusted or worn throttle cable - Replace cable or adjust correctly |
| Engine runs intermittently |
| Cooling fins are blocked - Need to clean or wash |
| Ignition failure - Inspect ignition system and change failed components |
| Defective or stuck choke cable - Replace or clean the cable |
| Clogged air filter - Replace or service air filter |
| Fuel pump is clogged or faulty - Service or change fuel pump |
| Defective spark plug - Change spark plug as required |
| Clogged or faulty carburetor - Service or change carburetor |
| Faulty ignition coil - Replace ignition coil as necessary |
| Valve springs are broken or bad - New valve springs need to be installed |
| Valves are stuck - Valves must be cleaned |
| Engine oil level is insufficient - Fill up the engine oil |
| Excessive engine load - Load reducing is recommended |
| Air intake screen is plugged - Need to wash or clean |
| Too lean fuel mixture in carburetor - Make the correct settings |
| Ignition timing is improper - Adjust ignition timing as required |
| Valve setting is wrong - Set the valves correctly |
| Low octane gasoline - Use correct fuel |
| Engine is running overloaded - Reduce the load |
| Not enough engine oil - Check and refill engine oil |
| Low idle speed setting is not correct - Correct idle settings |
| Dirty or defective fuel pump - Check fuel pump and replace if necessary |
| Crankshaft or main bearings failure - Change or repair worn components |
| Valve clearance is incorrect - Check and adjust |
| Piston rings or cylinder bore are damaged - Change defective parts |
| Engine power is insufficient |
| Dirty or incorrectly adjusted carburetor - Service or correctly adjust carburetor |
| Air filter is dirty - Change or clean air filter |
| Clogged or damaged fuel pump - Check fuel pump and replace if necessary |
| Ignition system malfunction - Inspect ignition system and change failed components |
| Damaged cylinder-head gasket - Cylinder-head gasket replacement required |
| Stuck or burned valves - Replace or service valves |
| Bent or worn push rod - Push rod needs to be changed |
| Worn cylinder block parts - Replace defective parts as required |
| Throttle is not fully open - Change or adjust throttle cable |
| Incorrect adjustment of carburetor main jet - Adjust the carburetor main jet correctly |
| Loose or defective spark plug - Re-tighten or change the spark plug |
| Worn, stuck, or burned valves - Replace or clean valves |
| Sleeve, piston, or rings are damaged - Replace faulty components |
| Valve clearance is wrong - Adjust valve clearance according to specifications |
| High engine oil consumption |
| Seals or gaskets are defective - Change worn parts according to specifications |
| Valve guides or stems are damaged - Replace the valves |
| Stuck or defective piston rings - Piston rings need to be replaced |
| Scored piston or cylinder liner - Check liner and piston, install new components as required |
| Breather pipe or hose is plugged - Replace or clean |
| Hydrostatic Transmission Troubleshooting |
| Excessive hydrostatic transmission noise |
| Bent or unadjusted speed control pedal linkage - Adjust or repair linkage |
| Excessive loading - Reduce the load is required |
| Fluid is contaminated or fluid level is insufficient - Add fluid to the correct level or fill the transmission with fresh fluid |
| Transmission parts are worm or defective - Check hydrostatic transmission components for defect or damage and change if necessary |
| Shift linkage is worn or rusty - Replace or lubricate the linkage |
| Hydrostatic pump is defective or blocked - Replace or repair pump |
| Transmission shift control components are defective or misadjusted - Adjust properly or change |
| Low oil level - Check transmission oil level and add oil as required |
| Drive pulley is worn or faulty - Change pulley |
| Misadjusted or faulty shifting linkage - Change or adjust linkage |
| Speed control linkage is defective or unadjusted - Adjust or replace linkage |
| Transmission seals or gaskets are broken - Seals and gaskets need to be replaced |
| Final drive shaft is leaking - Replace shaft seals |
| Cracked transmission case - Change broken case |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Clogged or damaged mower drive sheave - Clean or replace sheave |
| Worn or loose drive belt - Adjust belt tension or replace belt |
| Cutting blades are not balanced or warped - Balance blades or replace it |
| Loose blade mounting bolts - Bolts should be tightened |
| Constant clogging of discharge chute |
| Mowing speed is too high - Use a slower speed |
| Grass is too high - Must be set to low cutting height |
| Reduced engine speeds - Adjust carburetor to higher rpm |
| Mower deck set to low cutting - Change cutting height adjustment |
| Drive belt installed improperly - Install drive belt as required |
| Clogged mower deck - Mower deck needs to be cleaned |
| Blades are excessively dull - Sharpen the blades |
| Defective or worn blades - Change the blades |
| Fast ground speed - Use a slower speed |
| Cutting height is too low - Adjust mower to higher cutting height |
| Grass bag is overfilled - Grass bag must be empty |
| Blades are scalping the grass |
| Uneven or bumpy lawn - Level the lawn |
| Mower deck set to low cutting - Use correct cutting height |
| Ground speed is too fast - Need to slow down |
| Improperly leveled mower deck - Adjust the level of mower deck correctly |
| Worn or bent blades - Change the blades |
| Incorrect tire pressure - Correct tire pressure |
| Low tire pressure - Need to inflate tires |
| Improper mower deck level - Adjust the level of mower deck correctly |
| Blades are too dull - Need a blade sharpening |
| Blades are defective or worn - Change the blades |
| Deck clogged with grass clippings - Check cutting deck and clean as necessary |
| Broken mower deck shell - Rebuild or replace mower deck |
| Mower spindle is bent or loose - Repair or replace the spindle |
| Electrical Troubleshooting |
| Battery will not charge |
| Loose or corroded cable connections - Tighten or clean electrical wiring connections |
| Faulty battery terminal clamps - Install new terminal clamps |
| Bad cell in battery - Use a new battery |
| Starter motor cranks slow |
| Low battery power - Battery is drained, charge it |
| Battery does not hold charge - Service charging system or change battery |
| Bad terminals or disconnected battery cables - Connect wiring correctly or install new terminals |
| Battery is discharged or defective - Battery needs to be recharged or replaced |
| Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required |
| Low battery output voltage - Battery is drained, charge it |
| Spark plug faulty or incorrectly gapped - Clean, gap or replace spark plug |
| Starter motor or solenoid is defective - Change solenoid or repair starter |
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| Lawn and Garden Tractors Technical Specs |
