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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 |
