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Husqvarna LTA18538 Troubleshooting
The
Husqvarna LTA18538 lawn tractor was manufactured from 2015 to 2018. The
Husqvarna LTA18538 driveline includes a Briggs and Stratton 33R777 Intek 4-cycle
vertical-shaft single cylinder air-cooled gasoline engine and continuously
variable transmission (CVT) with infinite forward and reverse gears.
A 32.9 cu.in (540 cc) engine has a cylinder bore of 3.70" (94 mm),
piston stroke of 3.06" (77.8 mm), and rated power of 18.5 hp (13.8 kW).
The maximum forward speed - 7.4 mph (11.8 kph), maximum reverse speed -
2.9 mph (4.6 kph). The Husqvarna LTA18538 is fitted with 15x6.00-6 front
tires and 20x8.00-8 rear tires.
The wheelbase is 46.8 inches (1190 mm). The Husqvarna lawn tractor is
equipped with a 38" mid-mount 2-blade side discharge mower deck with
cutting height of 1.5-4.0" (38-101 mm) and mechanical lift system with
hand operated.
| Engine Troubleshooting |
| Engine difficult to start or doesn't start |
| No fuel in fuel tank - Add gasoline |
| Wrong fuel grade - Use quality gasoline |
| Air trapped in fuel system - Bleed air |
| Spark plug wire is loose or disconnected - Inspect spark plug wiring connection, change or repair |
| Faulty spark plug - Replace spark plug |
| Dirty fuel filter - Fuel filter needs changing |
| Brake pedal not pushed down - Push the brake pedal down |
| Carburetor not adjusted - Adjust according to instructions |
| Weak cylinder compression - Inspect cylinder block and change worn parts |
| Damaged or incorrectly adjusted choke cable - Change cable or adjust properly |
| Cooling fins are blocked - Wash or clean as required |
| Ignition system failure - Check ignition system and replace faulty parts |
| Defective or stuck choke cable - Clean or replace the cable |
| Clogged air filter - Replace or clean air filter |
| Fuel pump is faulty or clogged - Clean or change fuel pump |
| Engine starts but then stops |
| Faulty spark plug - Change spark plug as required |
| Carburetor is faulty or clogged - Clean or change carburetor |
| Damaged ignition coil - Change ignition coil as required |
| Valve springs are worn or loose - Replace valve springs |
| Valves sticking - Service the valves |
| Insufficient engine oil - Fill up the engine oil |
| Engine overloaded - Reduce engine load |
| Clogged cooling fins - Need to wash or clean |
| Carburetor is running lean - Set the carburetor properly |
| Bad ignition timing - Ignition timing needs to be adjusted correctly |
| Valve setting is improper - Adjust valves as required |
| Engine knocking sound or abnormal noise |
| Stale fuel - Change gasoline |
| Excessive engine load - Reduce load |
| Lack of engine oil - Fill the crankcase with engine oil |
| Wrong adjustment of low idle speed - Correct the settings |
| Dirty or defective fuel pump - Test fuel pump and change if necessary |
| Worn crankshaft or main bearings - Repair or replace defective parts |
| Incorrect valve clearance - Adjust valve clearance |
| Cylinder bore or piston rings are worn - Replace faulty parts |
| Engine power is insufficient |
| Carburetor is clogged or incorrectly adjusted - Adjust carburetor properly or service it |
| Dirty air filter element - Service or replace air filter |
| Dirty or faulty fuel pump - Check fuel pump and replace if necessary |
| Defective ignition system - Check ignition and replace faulty components |
| Damaged cylinder-head gasket - Replace the gasket as required |
| Burned or stuck valves - Clean or change valves |
| Worn or bent push rod - Install a new push rod |
| Worn cylinder block components - Defective components need to be replaced |
| Engine using too much gasoline |
| Insufficient throttle opening - Adjust or replace throttle cable |
| Improper carburetor main jet adjustment - Adjust it correctly |
| Faulty or loose spark plug - Spark plug need to be replaced or tightened |
| Valves are stuck, worn, or burned - Clean or replace valves |
| Rings, sleeve, or piston are damaged - Replace defective parts |
| Valve clearance is not correct - Adjustment procedure required |
| Engine consuming too much oil |
| Worn gaskets or seals - Defective components must be replaced |
| Worn valve guides and valve stems - Valves must be replaced |
| Worn or broken piston rings - Install new piston rings |
| Worn piston or cylinder liner - Check liner and piston, change as required |
| Blocked breather pipe or hose - Change or clean |
| Continuously Variable Transmission Troubleshooting |
| CVT transmission is excessively noisy |
| Speed control linkage is worn or unadjusted - Change or adjust linkage |
| Transmission overloaded - Reduce loading |
| Contaminated transmission fluid or low fluid level - Top up to proper level or change transmission fluid |
| Defective or worn transmission parts - Change or repair defective parts |
| Stuck or worn shift linkage - Linkage need to be replaced |
| Faulty or blocked hydrostatic pump - Change or repair pump |
| Transmission shift control parts are faulty or unadjusted - Replace or adjust as required |
| Low oil level - Check and refill the transmission oil |
| Worn or damaged drive sheave - Change sheave |
| Shifting linkage is broken or misadjusted - Replace or adjust linkage |
| Speed control linkage is worn or unadjusted - Adjust or replace linkage |
| Transmission gaskets or seals are worn - Replace seals or gaskets |
| Final drive shaft leaks - Shaft seals need to be changed |
| Transmission case is cracked - Replace case or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibration is excessive |
| Clogged or damaged mower drive sheave - Clean or replace sheave |
| Worn or loose drive belt - Replace belt or adjust belt tension |
| Mower blades are not balanced or warped - Balance blades or replace it |
| Blade bolts are not tightened well - Tighten it fast |
| Constant clogging of discharge chute |
| Ground speed is too fast - Select a lower speed |
| Tall grass - Need to set low cutting height |
| Engine is running at too low speed - Adjust carburetor to higher rpm |
| Mower deck set to low cutting - Use correct cutting height |
| Mower drive belt installation is improper - Reinstall drive belt properly |
| Grass patches are not cut |
| Clogged mower deck - Check cutting deck and clean as necessary |
| Blades are excessively dull - Need a blade sharpening |
| Worn or damaged blades - Blades must be changed |
| Ground speed is too fast - Use a slower speed |
| Mower cuts too low - Need to set high cutting height |
| Grass bag is full - Clean grass bag |
| Bumpy or unleveled lawn - Roll or level the lawn |
| Low cutting height - Use correct cutting height |
| Mowing speed is too high - Select a lower speed |
| Improper mower deck level - Adjust mower deck level properly |
| Blades are worn or bent - Blades must be changed |
| Tire pressure is too low - Check and inflate the tires |
| Incorrect tire pressure - Check and inflate the tires |
| Incorrect level of mower deck - Level the deck properly |
| Blades are not sharp - Need a blade sharpening |
| Worn or bent blades - Change the blades |
| Cutting deck is clogged - Check cutting deck and clean as necessary |
| Deck housing is damaged - Rebuild or replace mower deck |
| Loose or faulty mower spindle - Change or repair the spindle |
| Electrical Troubleshooting |
| Battery does not charge |
| Loose or corroded cable connections - Tighten or clean electrical wiring connections |
| Battery terminal connectors are defective - Terminal connectors should be replaced |
| Battery is worn - Battery replacement required |
| Low battery capacity - Battery is drained, recharge it |
| Battery is draining quickly - Battery needs to be serviced or replaced |
| Disconnected wires or corroded battery terminals - Check wiring and clean or replace terminals |
| Starter motor is not working |
| Battery is drained or defective - Change or recharge battery |
| Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required |
| Low battery voltage - Charge the battery |
| Spark plug worn or incorrectly gapped - Clean, gap or change spark plug |
| Faulty solenoid or starter motor - Change solenoid or repair starter |
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| Lawn and Garden Tractors Technical Specs |
