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Husqvarna TC 138 M Troubleshooting

The Husqvarna TC138M lawn tractor was manufactured from 2018 to 2022. The Husqvarna TC 138 M tractor can be equipped with the following models of gasoline engines: 25 cubic inches (725 cc) Briggs and Stratton 21R707 Intek 4-cycle single cylinder OHV vertical shaft air-cooled engine with a rated power of 10.5 Hp (7.8 kW), and 21.5 cubic inches (352 cc) Loncin LC1P85FA 4-cycle vertical-shaft single cylinder air-cooled engine with a max power of 13 Hp (9.6 kW).

The tractor is fitted with a Peerless 206-578 gear transmission with 6 forward and 1 reverse gears. The maximum forward speed - 4.7 mph (7.5 km/h), maximum reverse speed - 1.4 mph (2.3 km/h). The Husqvarna TC 138 M is equipped with a manual steering system, pneumatic wheels, 15x6.00-6 front tires, and 18x8.50-8 rear tires.

The tractor is compatible with a 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 won't start or hard to start
No gasoline in tank - Fill it up
Wrong grade of gasoline - Change gasoline
Air or water in fuel system - Remove water or air from fuel system
Defective spark plug wire connection - Inspect spark plug wiring connection, change or repair
Damaged spark plug - Change spark plug
Plugged fuel filter - Install new filter
Brake pedal not depressed - Press the brake pedal
Carburetor components worn out - Repair or replace parts
Engine has low compression - Check cylinder block and replace defective parts
Worn or improperly adjusted choke cable - Replace cable or adjust properly
Engine runs intermittently
Cooling fins are plugged - Need to wash or clean
Defective ignition system - Test ignition and replace failed parts
Faulty or stuck throttle cable - Service or replace the cable
Air filter is dirty - Change or clean air filter
Dirty or defective fuel pump - Check fuel pump and change if required
Engine starts and stalls immediately
Spark plug is faulty - Replace spark plug
Carburetor is defective or clogged - Clean or install new carburetor
Defective ignition coil - Ignition coil should be replaced
Valve springs are bad or broken - New valve springs need to be installed
Valves are stuck - Clean the valves
Engine overheated
Engine oil level low - Fill up the engine oil
Excessive engine load - Reduce engine load
Air intake screen is plugged - Need to clean or wash
Too lean fuel mixture in carburetor - Set the carburetor properly
Bad ignition timing - Ignition timing needs to be adjusted correctly
Valve setting is wrong - Valves needs to be set correctly
Engine knocks or noises
Low octane fuel - Use proper gasoline
Excessive engine load - Reduce load
Engine oil level is low - Fill up the engine oil
Incorrect low idle setting - Adjustment required
Fuel pump is damaged or dirty - Clean or change fuel pump
Main bearings or crankshaft are worn out - Repair or replace defective parts
Incorrect valve clearance - Adjustment procedure required
Piston rings or cylinder bore are worn - Replace defective parts
Engine power is too low
Improperly or clogged carburetor - Adjust carburetor properly or service it
Air filter is blocked - Service or change air filter
Dirty or faulty fuel pump - Clean or replace fuel pump
Ignition system failure - Check ignition system and replace faulty parts
Defective cylinder head gasket - Replace the head gasket
Valves are burned or stuck - Replace or service valves
Push rod is bent or worn - Push rod should be replaced
Faulty cylinder block components - Replace defective components
High fuel consumption
Choke didn't open fully - Adjust or change choke cable
Carburetor main jet is improperly adjusted - Adjust main jet as required
Loose or faulty spark plug - Re-tighten or replace spark plug
Stuck, worn, or burned valves - Service or change valves
Sleeve, rings, or piston are damaged - Replace defective parts as required
Incorrect valve clearance - Check and adjust
Engine oil consumption is too high
Worn seals or gaskets - Replace worn parts to avoid leaks
Damaged valve guides or valve stems - Valves replacement required
Seized or wear piston rings - Change the piston rings as required
Scuffed piston or cylinder liner - Check liner and piston, change as required
Breather pipe or hose is blocked - Replace or clean

Transmission Troubleshooting
Hard to shift gears
Gear shift linkage is worn or rusty - Replace or lubricate the shift linkage
Worn or damaged shift forks - Shift forks need to be replaced
Worn gear shifting mechanism - Repair or change worn components if necessary
Transmission noises
Fluid level is low - Check and refill the transmission fluid
Dirty transmission oil - The oil must be changed
Bearings are damaged or gears are worn - Change defective parts
Transmission pops out of gear
Improperly installed or damaged shifting lever - Replace or install shift lever correctly
Gear teeth are worn or damaged - Install new gears
Shift forks or shift rods are faulty - Replace damaged rods or forks
Transmission slipping
Drive shaft/belt is incorrectly adjusted or worn - Install a new shaft/belt or adjust it
Clutch/brake is improperly adjusted or worn - Adjust clutch/brake or install a new one
Drive sheave is worn or faulty - Install a new sheave

Mower Deck Troubleshooting
Mower vibrates too much
Worn or dirty mower drive pulley - Clean or replace pulley
Loose or defective drive belt - Belt needs to be adjusted or replaced
Warped or not balanced mower blades - Replace or balance blades
Blade mounting bolts are loose - Tighten bolts as required
Discharge chute regular clogging
Fast mowing speed - Select a lower speed
Grass is too long - Must be set to low cutting height
Low engine speeds - Adjust throttle to full opening
Mower cuts too low - Change cutting height adjustment
Mower drive belt installation is improper - Check drive belt for correct installation
Mower leaving random uncut of grass
Deck is plugged with grass - Check cutting deck and clean as necessary
Blades are not sharp - Blades need to be sharpened
Defective or worn blades - Install new blades
Fast ground speed - Select a lower speed
Cutting level is too low - Must be set to high cutting height
Full grass bag - Clean grass bag
Blades scalping grass
Bumpy or unleveled lawn - Lawn needs to be leveled
Cutting level is too low - Must be set to high cutting height
High mowing speed - Operate at slower speed
Deck is not leveled correctly - Level the deck properly
Worn or bent blades - Change the blades
Incorrect tire pressure - Check and inflate the tires
Mower cuts uneven
Low tire pressure - Inflate tires correctly
Mower deck is not leveled properly - Deck should be adjusted correctly
Blades are excessively dull - Need a blade sharpening
Worn or bent blades - Install new blades
Deck is plugged with grass - Need to clean the mower deck
Broken mower deck housing - Rebuild or change mower deck
Loose or faulty mower spindle - Replace or repair the spindle

Electrical Troubleshooting
Battery does not charge
Corroded or loose cable connections - Tighten or clean electrical wiring connections
Defective battery terminal connectors - Terminal connectors need to be changed
Battery is defective - Battery replacement required
Starter motor turns slow
Battery voltage is low - Battery is drained, charge it
Battery drains quickly - Service charging system or change battery
Bad battery terminals or disconnected wiring - Connect wires correctly or change terminals
Starter will not crank
Battery is discharged or defective - Need to charge or replace the battery
Wiring is improperly connected or disconnected - Check wiring and connect properly
Battery capacity is low - Charge the battery
Spark plug gapped improperly or faulty - Replace or clean and gap
Damaged starter motor or solenoid - Repair starter or change solenoid



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