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Husqvarna LGT48DXL Troubleshooting
The
Husqvarna LGT48DXL lawn tractor was manufactured from 2017 to 2021. The
Husqvarna LGT48DXL driveline includes a Kohler 7000 Series KT725 4-cycle
twin-cylinder air-cooled vertical shaft gasoline engine and Tuff Torq K46
belt-driven hydrostatic transmission with infinite forward and reverse gears.
A 44.2 cubic inches (725 cc) engine has a cylinder bore of 3.27" (83
mm), piston stroke of 2.64" (67 mm), max power of 25 hp (18.2 kW), and
maximum torque of 54.8 Nm (40.4 lb-ft) at 2600 rpm. Max. forward speed -
5.5 mph (8.8 km/h), max. reverse speed - 2.5 mph (4 km/h).
The Husqvarna LGT48DXL was equipped with a manual steering system, disc
brakes, 16x6.50-8 front tires, and 22x9.50-12 rear tires. The wheel base
is 48" (1220 mm). The tractor is compatible with a 48" mid-mount 3-blade
side discharge mower deck with cutting height of 1.5-4.0 in (38-101 mm),
seven cut positions, four anti-acalp wheels, electric blade engagement,
and mechanical lift system.
Engine Troubleshooting |
Engine won't start or difficult to start |
Empty gas tank - Fill gasoline up |
Wrong grade of gasoline - Use correct fuel grade |
Air in fuel tank - Bleed fuel tank |
Damaged spark plug wiring connection - Check the spark plug wire connection, repair or replace |
Spark plug is defective - Change spark plug as required |
Clogged fuel filter - Fuel filter needs changing |
Brake pedal not depressed - Press the brake pedal |
Carburetor problems - Carburetor diagnostics required |
Poor engine compression - Check cylinder block and replace damaged components |
Not adjusted or damaged throttle cable - Replace cable or adjust correctly |
Engine runs intermittently |
Cooling fins are blocked - Need to wash or clean |
Ignition system is defective - Inspect ignition system and change failed components |
Choke cable is faulty or stuck - Replace or clean the cable |
Plugged air filter - Service or replace air filter |
Fuel pump is defective or dirty - Clean or install new fuel pump |
Engine starts and stops immediately |
Defective spark plug - Replace spark plug |
Carburetor is faulty or dirty - Clean or install new carburetor |
Ignition coil is defective - Replace ignition coil as necessary |
Valve springs are damaged or weak - Install new valve springs |
Valves are stuck - Clean the valves |
Low engine oil level - Fill up the oil to required level |
Engine overloaded - Reduce the load |
Cooling fins are plugged - Wash or clean as required |
Too lean carburetor mixture - Set the carburetor correctly |
Ignition timing is incorrect - Ignition timing needs to be set properly |
Valve setting is incorrect - Valves needs to be adjusted properly |
Stale fuel - Change gasoline |
Engine overload - Reduce the load |
Engine oil level is insufficient - Fill up the oil to required level |
Low idle speed set incorrectly - Need to adjust idle speed |
Clogged or defective fuel pump - Service or change fuel pump |
Worn main bearings or crankshaft - Need to install new components |
Incorrect valve clearance - Check and adjust |
Piston rings or cylinder bore are worn - Replace defective components |
Carburetor is incorrectly adjusted or dirty - Adjust the carburetor correctly or clean it |
Air filter element is clogged - Clean or replace air filter |
Fuel pump is faulty or clogged - Test fuel pump and change if necessary |
Ignition failure - Check ignition system and replace faulty parts |
Cylinder head gasket is defective - Cylinder-head gasket replacement required |
Valves are stuck or burned - Clean or replace valves |
Push rod is worn or bent - Change push rod |
Cylinder block parts are worn out - Replace defective components as required |
Excessive fuel consumption |
Choke is not fully open - Check choke cable and adjust it |
Carburetor main jet is improperly adjusted - Adjust it properly |
Loose or faulty spark plug - Re-tighten or change the spark plug |
Valves are stuck, burned, or worn - Clean or change valves |
Worn sleeve, piston, or rings - Replace faulty components as required |
Improper valve clearance - Adjust valve clearance according to specifications |
Excessive oil consumption |
Seals or gaskets are defective - Defective components must be replaced |
Worn valve guides and valve stems - Valves need to be changed |
Worn or stuck piston rings - Replace piston rings |
Scored piston or cylinder liner - Inspect liner and piston, change as necessary |
Breather hose or pipe is blocked - Change or service |
Hydrostatic Transmission Troubleshooting |
Hydrostatic transmission makes noise |
Speed control linkage is defective or unadjusted - Adjust or repair linkage |
Transmission overload - Reduce transmission load |
Insufficient oil level or contaminated oil - Fill to required level or change the transmission oil |
Damaged or worn components of hydrostatic transmission - After disassembly and inspection, replace defective components |
Worn or rusty shift linkage - Install new linkage |
Worn or seized hydrostatic pump - Change or repair pump |
Worn or misadjusted transmission shift control parts - Adjust correctly or replace |
Lack of transmission fluid - Fill the transmission housing to proper fluid level |
Drive sheave is worn or faulty - Replace sheave |
Shifter linkage is not adjusted or faulty - Replace or adjust linkage |
Speed control linkage is worn or unadjusted - Replace or adjust linkage |
Transmission gaskets or seals are damaged - Seals and gaskets need to be replaced |
Final drive shaft leakage - Install new shaft seals |
Cracked transmission case - Install a new transmission case |
Mower Deck Troubleshooting |
Mower vibration is excessive |
Mower deck drive pulley is worn or dirty - Replace or clean pulley |
Damaged or loose drive belt - Belt needs to be adjusted or replaced |
Cutting blades are bent or unbalanced - Balance or replace blades |
Loose blade mounting bolts - Tighten bolts as required |
Discharge chute is constantly plugged |
Mowing speed is too high - Use a lower speed |
Tall grass - Must be set to low cutting height |
Reduced engine rpm - Choke is not fully opening |
Mower deck set to low cutting - Adjust mower to higher cutting height |
Incorrect mower drive belt installation - Drive belt must be installed correctly |
Grass patches are not cut |
Discharge chute is plugged - Inspect and clean cutting deck |
Blades are not sharp - Blades need to be sharpened |
Damaged or worn blades - Blades need to be replaced |
Fast mowing speed - Select a lower speed |
Mower deck set to low cutting - Use a higher cutting height |
Filled bagger - Bagger must be empty |
Lawn is uneven or bumpy - Level the lawn |
Mower deck set to low cutting - Use correct cutting height |
High mowing speed - Need to slow down |
Incorrect level of mower deck - Adjust the level of mower deck correctly |
Blades are worn or bent - Install new blades |
Tires are not correctly inflated - Inflate tires as required |
Tires are not correctly inflated - Check and inflate the tires |
Deck is not leveled correctly - Adjust the level of mower deck correctly |
Excessive blade dullness - Need to sharpen the blades |
Blades are worn or damaged - Replace the blades |
Discharge chute is plugged - Need to clean the mower deck |
Broken mower deck housing - Repair or replace the deck |
Loose or defective mower spindle - Change or repair the spindle |
Electrical Troubleshooting |
Battery won’t charge |
Electrical cable connections are corroded or loose - Tighten or clean connections |
Battery terminal clamps are faulty - Replace terminal clamps |
Worn-out battery - Battery change required |
Low battery voltage - Charge the battery |
Battery does not hold charge - Service battery or replace it |
Disconnected cables or faulty battery terminals - Connect wires correctly or change terminals |
Battery is drained or defective - Charge or replace the battery |
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed |
Low battery capacity - Charge the battery |
Improperly gapped or dirty spark plug - Replace or clean and gap |
Starter motor or solenoid is damaged - Starter/solenoid needs to be replaced |
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Lawn and Garden Tractors Technical Specs |