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Husqvarna TC 138L Troubleshooting
The
Husqvarna TC 138L lawn tractor was manufactured between 2019 and 2022. The
Husqvarna TC138L driveline consists of Loncin LC1P92F-1 4-cycle vertical-shaft
single cylinder air-cooled gasoline engine and Tuff Torq K46 DC belt-driven
hydrostatic transmission with infinite forward and reverse gears.
A 27.6 cubic inches (452 cc) engine has a cylinder bore of 3.62" (92
mm), piston stroke of 2.68" (68 mm), and maximum power of 16 hp (11.9
kW). The fuel system has a fixed main jet carburetor and pulse fuel
pump. The maximum forward speed - 5 mph (8 kph), maximum reverse speed -
2.2 mph (3.5 kph).
The Husqvarna TC 138L lawn tractor is equipped with a manual steering
system, pneumatic wheels, 15x6.00-6 front tires, and 18x8.50-8 rear
tires. Compatible attachments for the tractor: 38" mid-mount 2-blade
side discharge mower deck with cutting height of 1.5-4.0 in (38-101 mm),
manual blade engagement, six cut positions, and mechanical lift system
with hand operated.
| Engine Troubleshooting |
| Engine difficult to start or doesn't start |
| Empty fuel tank - Add gasoline |
| Wrong grade of gasoline - Use quality gasoline |
| Dirty fuel lines - Inspect and clean |
| Damaged spark plug wiring connection - Inspect spark plug wiring connection, change or repair |
| Spark plug is faulty - Install new spark plug |
| Plugged fuel filter - Replace fuel filter |
| Defective safety switch - Replace if required |
| Incorrect carburetor adjustment - Adjust carburetor idle mixture screw |
| Poor compression - Inspect and replace wear parts |
| Damaged or incorrectly adjusted choke cable - Adjust correctly or replace the cable |
| Plugged cooling fins - Need to clean or wash |
| Ignition failure - Check ignition and replace faulty components |
| Throttle cable is defective or stuck - Clean or change the cable |
| Air filter is dirty - Replace or service air filter |
| Clogged or damaged fuel pump - Service or change fuel pump |
| Engine starts but then stalls |
| Spark plug is faulty - Spark plug need to be replaced |
| Defective or dirty carburetor - Replace or service carburetor |
| Ignition coil is damaged - Change ignition coil as required |
| Valve springs are weak or broken - New valve springs need to be installed |
| Valves sticking - Valves need to be cleaned |
| Low engine oil level - Need to add engine oil |
| Engine is running overloaded - Reduce load |
| Cooling fins are clogged - Wash or clean as required |
| Carburetor mixture is too lean - Make the correct settings |
| Wrong ignition timing - Adjust ignition timing as required |
| Valve setting is incorrect - Set the valves properly |
| Stale or low octane fuel - Use proper gasoline |
| Engine is under excessive load - Load reducing required |
| Engine oil level low - Add oil to the engine crankcase |
| Too low idle RPM - Adjust idling as required |
| Fuel pump is dirty or defective - Test fuel pump and replace if necessary |
| Worn main bearings or crankshaft - Need to install new components |
| Valve clearance is incorrect - Check and adjust |
| Piston rings or cylinder bore are worn - Change faulty components |
| Carburetor is dirty or incorrectly adjusted - Carburetor needs to be adjusted correctly or cleaned |
| Air filter is dirty - Service or replace air filter |
| Clogged or defective fuel pump - Test fuel pump and change if necessary |
| Ignition system is defective - Inspect ignition system and change failed components |
| Worn cylinder head gasket - Change cylinder head gasket |
| Valves are burned or stuck - Replace or clean valves |
| Worn or damaged push rod - Push rod needs to be changed |
| Damaged cylinder block components - Replace defective components |
| Insufficient throttle opening - Adjust or replace throttle cable |
| Carburetor main jet adjustment is improper - Adjust it properly |
| Loose or defective spark plug - Spark plug need to be tightened or replaced |
| Burned, worn, or stuck valves - Replace or clean valves |
| Worn rings, piston, or sleeve - Replace faulty parts |
| Valve clearance is improper - Adjust valve clearance |
| Excessive oil consumption |
| Gaskets or seals may be damaged - Worn parts need to be replaced |
| Damaged valve guides or valve stems - Valves replacement required |
| Piston rings are stuck or broken - Install new piston rings |
| Scored piston or cylinder liner - Inspect liner and piston, replace as necessary |
| Breather hose or pipe is plugged - Service or change |
| Hydrostatic Transmission Troubleshooting |
| HST transmission is excessively noisy |
| Worn or out of adjustment speed control linkage - Change or adjust linkage |
| Transmission is under excessive load - Reduce loading |
| Low transmission oil level or contaminated oil - Add oil to the correct level or fill the transmission with fresh oil |
| Worn or defective transmission components - Change or repair defective parts |
| Stuck or damaged gshift linkage - Replace or repair the linkage |
| Blocked or faulty hydrostatic pump - Replace or repair pump |
| Misadjusted or faulty transmission shift control components - Change or adjust correctly |
| Lack of transmission fluid - Add fluid to the transmission housing |
| Defective or worn drive sheave - Install a new sheave |
| Shifter linkage is not adjusted or faulty - Adjust properly or replace linkage |
| Worn or out of adjustment speed control linkage - Adjust or repair linkage |
| Worn transmission seals or gaskets - Install new seals or gaskets |
| Final drive shaft leaks - Change shaft seals |
| Cracked transmission housing - Replace housing or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibrates too much |
| Mower deck drive sheave is clogged or worn - Replace or clean sheave |
| Loose or damaged drive belt - Adjust belt tension or install a new belt |
| Cutting blades are bent or unbalanced - Change or balance blades |
| Blade mounting bolts are loose - Bolts should be tightened |
| Discharge chute is constantly plugged |
| Mowing speed is too high - Use a slower speed |
| Long grass - Use a lower cutting height |
| Low engine speeds - Adjust throttle to full opening |
| Cutting level is too low - Adjust mower to higher cutting height |
| Improper drive belt installation - Drive belt must be installed correctly |
| Deck clogged with grass clippings - Need to clean the mower deck |
| Blades are too dull - Blades need to be sharpened |
| Worn or damaged blades - Blades must be changed |
| Fast ground speed - Use a lower speed |
| Cutting level is too low - Change cutting height adjustment |
| Grass bag is full - Clean grass bag |
| Bumpy or unleveled lawn - Lawn leveling required |
| Mower deck set to low cutting - Need to set high cutting height |
| High mowing speed - Use a lower speed |
| Improper mower deck level - Level the deck correctly |
| Blades are bent or worn - Blades must be changed |
| Tires are not correctly inflated - Inflate tires as required |
| Incorrect tire pressure - Inflate tires as required |
| Deck level is not correct - Level the deck properly |
| Not sharp blades - Need to sharpen the blades |
| Blades are worn or damaged - Blades need to be replaced |
| Discharge chute is plugged - Need to clean the mower deck |
| Damaged mower deck housing - Replace or rebuild mower deck |
| Mower spindle is loose or defective - Replace or repair the spindle |
| Electrical Troubleshooting |
| Battery won’t charge |
| Wiring connections are loose or corroded - Tighten or clean connections |
| Defective battery terminal clamps - Change terminal clamps |
| Bad cell in battery - Battery replacement required |
| Low battery output - Battery is drained, recharge it |
| Battery runs out quickly - Service or replace the battery |
| Battery cables are disconnected or terminals are faulty - Connect cables properly or replace terminals |
| Battery is low or faulty - Charge or replace the battery |
| Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly |
| Battery voltage is low - Charge the battery |
| Faulty or incorrectly gapped spark plug - Replace or clean and gap |
| Starter motor or solenoid is damaged - Repair starter or install a new solenoid |
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| Lawn and Garden Tractors Technical Specs |
