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Husqvarna TC338 Troubleshooting
The
Husqvarna TC 338 2WD garden tractor was manufactured between 2014 and 2018. The
Husqvarna TC338 driveline consists of Briggs and Stratton 40S777 -cycle V-twin
cylinder OHV air-cooled gasoline engine and Tuff Torq K46 DF belt-driven
hydrostatic transmission with infinite forward and reverse gears.
A 40.1 cubic inches (656 cc) engine has a cylinder bore of 2.97" (75
mm), piston stroke of 2.89" (73 mm), and rated power of 20 hp (14.8 kW).
The fuel system has a float-feed fixed main jet carburetor and integral
type fuel pump. The maximum forward speed - 5 mph (8 kph), maximum
reverse speed - 2.2 mph (3.5 kph).
The Husqvarna TC 338 lawn tractor is equipped with a manual steering
system, pneumatic wheels, 15x6.00-6 front tires, and 18x9.50-8 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),
electric blade engagement, 6 cut positions, and mechanical lift system
with hand operated.
| Engine Troubleshooting |
| Engine starts up hard or doesn't start |
| Empty fuel tank - Fill fuel up |
| Improper fuel grade - Use quality gasoline |
| Air in fuel system - Bleed fuel system |
| Spark plug wire is loose or disconnected - Check spark plug wiring connection, repair or change |
| Spark plug is faulty - Change spark plug |
| Dirty fuel filter - Install new filter |
| Defective safety switch - Replace if required |
| Carburetor components worn out - Repair or replace parts |
| Bad compression - Check and change damaged parts |
| Damaged or not adjusted choke cable - Adjust correctly or change the cable |
| Air intake screen is blocked - Need to clean or wash |
| Defective ignition system - Inspect ignition system and change failed components |
| Throttle cable is defective or stuck - Replace or service the cable |
| Plugged air filter - Service or replace air filter |
| Clogged or damaged fuel pump - Clean or replace fuel pump |
| Engine starts but immediately shuts off |
| Damaged spark plug - Install new spark plug |
| Dirty or defective carburetor - Clean or change carburetor |
| Ignition coil is damaged - Install a new ignition coil |
| Bad or broken valve springs - Install new valve springs |
| Valves are stuck - Valves must be cleaned |
| Engine oil level is low - Fill up the engine oil |
| Engine overloaded - Load reducing is recommended |
| Cooling fins are clogged - Need to wash or clean |
| Carburetor is running lean - Set the carburetor correctly |
| Bad ignition timing - Set the ignition timing correctly |
| Valve setting is incorrect - Valves needs to be adjusted properly |
| Low octane fuel - Change fuel |
| Engine is running overloaded - Load reducing required |
| Low engine oil level - Need to add engine oil |
| Wrong adjustment of low idle speed - Adjust as required |
| Clogged or damaged fuel pump - Clean or replace fuel pump |
| Crankshaft or main bearings failure - Install new parts as as required |
| Valve clearance is incorrect - Adjust valve clearance according to specifications |
| Piston rings or cylinder bore are worn - Replace faulty components |
| Carburetor is incorrectly adjusted or clogged - Clean or correctly adjust carburetor |
| Clogged air filter - Clean or replace air filter |
| Fuel pump is damaged or dirty - Service or change fuel pump |
| Ignition system problems - Inspect ignition system and change failed components |
| Defective cylinder head gasket - Change cylinder head gasket |
| Stuck or burned valves - Service or change valves |
| Worn or defective push rod - Replace push rod |
| Cylinder block components are damaged - Replace defective parts |
| Excessive fuel consumption |
| Throttle is not fully open - Change or adjust throttle cable |
| Carburetor main jet is incorrectly adjusted - Adjust main jet as required |
| Spark plug is loose or defective - Re-tighten or replace spark plug |
| Worn, stuck, or burned valves - Clean or replace valves |
| Worn sleeve, rings, or piston - Replace defective parts |
| Excessive valve clearance - Adjust valve clearance |
| High engine oil consumption |
| Worn gaskets or seals - Defective components must be replaced |
| Worn valve guides and valve stems - Valves replacement required |
| Stuck or defective piston rings - Change piston rings |
| Damaged piston or cylinder liner - Inspect liner and piston, replace as necessary |
| Breather hose or pipe is blocked - Change or clean |
| Hydrostatic Transmission Troubleshooting |
| HST transmission noise |
| Speed control linkage is defective or unadjusted - Adjust or change linkage |
| Transmission overloaded - The load should be reduced |
| Insufficient oil level or contaminated oil - Add oil to proper level or pour fresh transmission oil |
| Worn or defective parts of the hydrostatic transmission - Change or repair defective parts |
| Shift linkage is stuck or worn - Clean or replace linkage |
| Blocked or faulty hydrostatic pump - Repair or change pump |
| Worn or misadjusted transmission shift control parts - Adjust correctly or replace |
| Transmission oil insufficient - Add oil to the transmission housing |
| Drive sheave is damaged or worn - Install a new sheave |
| Shifting linkage is misadjusted or broken - Adjust correctly or change linkage |
| Speed control pedal linkage is bent or not adjusted - Adjust or replace linkage |
| Broken transmission gaskets or seals - Install new seals or gaskets |
| Final drive shaft leakage - Install new shaft seals |
| Cracked transmission case - Replace defective case or transmission assembly |
| Mower Deck Troubleshooting |
| Mower vibrates excessively |
| Worn or dirty mower drive pulley - Service or replace pulley |
| Damaged or loose drive belt - Adjust belt tension or replace belt |
| Not balanced or bent mower blades - Balance or replace blades |
| Loose blade bolts tightening - Bolts need to be tightened |
| Constant clogging of discharge chute |
| Ground speed is too fast - Select a lower speed |
| Grass is too high - Use a lower cutting height |
| Engine runs at low revs - Choke is not fully opening |
| Cutting level is too low - Must be set to high cutting height |
| Incorrect mower drive belt installation - Check drive belt for correct installation |
| Lawn mower leaving uncut grass |
| Discharge area is clogged - Clean mower deck as required |
| Blades are not sharp - Sharpen the blades |
| Damaged or worn blades - Change the blades |
| High mowing speed - Select a slower speed |
| Cutting height is too low - Adjust mower to higher cutting height |
| Grass bag is full - Grass bag must be empty |
| Lawn is bumpy or not smooth - Lawn needs to be leveled |
| Mower deck set to low cutting - Must be set to high cutting height |
| High ground speed - Select a slower speed |
| Incorrect level of mower deck - Level the deck properly |
| Blades are bent or worn - Change the blades |
| Low tire pressure - Need to inflate tires |
| Mower deck to cut unevenly |
| Low tire pressure - Correct tire pressure |
| Mower deck is not leveled properly - Deck should be adjusted correctly |
| Blades are excessively dull - Sharpen the blades |
| Worn or bent blades - Blades need to be replaced |
| Discharge chute is plugged - Mower deck needs to be cleaned |
| Damaged mower deck housing - Repair or change the deck |
| Mower spindle is loose or defective - Repair or change the spindle |
| Electrical Troubleshooting |
| Battery won’t charge |
| Loose or corroded cable connections - Service or tighten connections |
| Defective battery terminal clamps - Terminal clamps should be changed |
| Battery dead cell - Battery replacement required |
| Low battery capacity - Battery needs to be recharged |
| Battery will not hold charge - Battery needs service or replacement |
| Disconnected cables or faulty battery terminals - Check cables and clean or change terminals |
| Starter motor is not working |
| Battery is discharged or defective - Recharge or replace battery |
| Disconnected or improperly connected wiring harness - Inspect battery wiring harness and connect as required |
| Low battery capacity - Battery needs to be recharged |
| Spark plug worn or incorrectly gapped - Clean and gap or replace |
| Solenoid or starter motor is faulty - Starter/solenoid should be replaced |
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| Lawn and Garden Tractors Technical Specs |
