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John Deere LA110 Troubleshooting

The John Deere LA110 is a two-wheel drive lawn tractor from LA100 series. This model was manufactured between 2007 and 2009.

The John Deere LA110 driveline system components: 30.6 cu.in (501 cc) 4-cycle single cylinder OHV vertical shaft air-cooled gasoline engine with a rated power of 19.5 hp (14.5 kW) and Tuff Torq K46 belt-driven hydrostatic transmission with infinite forward and reverse gears.

The engine has a float feed carburetor, pulse type fuel pump, lubrication system with oil pump and filter, and air cleaner with paper and foam elements. The maximum travel speed (forward/reverse): 5.5 mph (8.8 km/h) and 3.2 mph (5 km/h).

The John Deere LA110 was equipped with a manual steering, wet disc brakes, 15x6.00-6 front tires, and 20x8.00-8 rear tires. The wheelbase is 49 in (1240 mm). The tractor is compatible with a 42" mid-mount 2-blade mower deck with cutting height of 1.0-4.0" (25-102 mm) and manual lifting system.

Engine Troubleshooting
Engine doesn't start or difficult to start
Fuel tank is empty - Add fuel
Wrong fuel grade - Use correct fuel grade
Dirty fuel lines - Inspect and clean
Faulty spark plug wire connection - Check the spark plug wire connection, repair or replace
Faulty spark plug - Change spark plug as required
Fuel filter is dirty - Install new filter
Defective safety switch - Replace if required
Carburetor incorrectly set - Set carb correctly
Poor cylinder compression - Check cylinder block and change worn parts
Worn or unadjusted choke cable - Replace cable or adjust properly
Unstable engine running
Plugged cooling fins - Wash or clean as required
Ignition system failure - Check ignition and replace faulty components
Stuck or defective throttle cable - Service or change the cable
Air filter element is clogged - Change or service air filter
Fuel pump is faulty or clogged - Test fuel pump and replace if necessary
Engine starts but stalls suddenly
Faulty spark plug - Spark plug need to be replaced
Defective or clogged carburetor - Clean or install new carburetor
Faulty ignition coil - Ignition coil must be replaced
Loose or broken valve springs - Change valve springs
Valves are stuck - Clean the valves
Engine overheats
Engine oil level is low - Fill up the engine oil
Engine overloaded - Load reducing is recommended
Air intake grill is clogged - Need to clean or wash
Carburetor is running lean - Adjust carburetor correctly
Ignition timing is improper - Ignition timing needs to be adjusted correctly
Valve setting is wrong - Adjust valves as required
Engine noise or knocking
Stale or low octane fuel - Use correct gasoline
Engine overload - Load reducing is recommended
Lack of engine oil - Need to add engine oil
Low idle speed set incorrectly - Correct the settings
Fuel pump is faulty or clogged - Clean or change fuel pump
Worn crankshaft or main bearings - Have bearings or crankshaft replaced
Valve clearance is improper - Check and adjust
Worn piston rings or cylinder bore - Replace defective parts
Engine lacks power
Improperly adjusted or dirty carburetor - Service or properly adjust carburetor
Air filter is blocked - Replace or clean air filter
Clogged or damaged fuel pump - Service or change fuel pump
Ignition system malfunction - Inspect ignition system and change failed components
Cylinder head gasket is damaged - Replace the head gasket
Stuck or burned valves - Clean or replace valves
Push rod is damaged or worn - Replace push rod
Cylinder block parts are damaged - Replace defective components
Engine using too much gasoline
Choke is not fully open - Check choke cable and adjust it
Carburetor main jet is incorrectly adjusted - Adjust the carburetor main jet correctly
Loose or defective spark plug - Tighten or replace spark plug
Valves are stuck, worn, or burned - Service or change valves
Worn rings, piston, or sleeve - Replace defective parts as required
Valve clearance is wrong - Adjustment procedure required
Engine consuming too much oil
Seals or gaskets are wearing excessively - To repair leaks, replace worn parts
Worn valve guides and valve stems - Replace defective valves
Worn or broken piston rings - Install new piston rings
Cylinder liner or piston is scored - Check piston and liner, change as required
Blocked breather hose or pipe - Service or change

Hydrostatic Transmission Troubleshooting
HST transmission noise
Defective or not adjusted speed control pedal linkage - Adjust or install new linkage
Transmission is under excessive load - Load needs to be reduced
Oil is dirty or oil level is too low - Add oil to the correct level or fill the transmission with fresh oil
Transmission parts are worm or defective - Change or repair defective parts
Difficult to shift
Stuck or worn shift linkage - Linkage need to be replaced
Hydrostatic pump is blocked or defective - Change or repair pump
Damaged or unadjusted transmission shift control components - Adjust properly or change
Loss of power
Lack of transmission oil supply - Fill the transmission housing to proper oil level
Defective or worn drive sheave - Install a new sheave
Shifter linkage is faulty or not adjusted - Replace or adjust linkage
Speed control linkage is defective or unadjusted - Adjust or install new linkage
Transmission leaking
Transmission gaskets or seals are worn - Change seals or gaskets
Final drive shaft is leaking - Replace shaft seals
Cracked transmission housing - Install a new transmission housing

Mower Deck Troubleshooting
Mower vibrates too much
Mower deck drive sheave is clogged or worn - Replace or service sheave
Drive belt is worn or loose - Replace belt or adjust belt tension
Mower blades are warped or not balanced - Change or balance blades
Loose blade bolts tightening - Tighten bolts as required
Discharge chute regular clogging
Ground speed is too fast - Use a lower speed
Long grass - Adjust mower to lower cutting height
Reduced engine speeds - Adjust throttle to full opening
Cutting height is too low - Need to set high cutting height
Incorrect mower drive belt installation - Reinstall drive belt properly
Streaking of uncut grass
Cutting deck clogging - Mower deck needs to be cleaned
Not sharp blades - Sharpen the blades
Worn or defective blades - Blades need to be replaced
Mowing speed is too high - Use a slower speed
Cutting height is too low - Adjust mower to higher cutting height
Full bagger - Bagger must be empty
Blades scalp the grass
Lawn is bumpy or not smooth - Level the lawn
Cutting level is too low - Use a higher cutting height
High mowing speed - Select a lower speed
Improper mower deck level - Deck should be adjusted correctly
Worn or bent blades - Change the blades
Incorrect tire pressure - Need to inflate tires
Uneven cutting
Incorrect tire pressure - Check and inflate the tires
Mower deck is not leveled properly - Level the deck correctly
Blades are excessively dull - Sharpen the blades
Blades are defective or worn - Blades need to be replaced
Mower deck is clogged - Inspect and clean cutting deck
Deck shell is damaged - Rebuild or change mower deck
Mower spindle is faulty or loose - Spindle needs to be repaired or replaced

Electrical Troubleshooting
Battery cannot be charged
Corroded or loose electrical wire connections - Tighten or service connections
Electrical terminal connectors are faulty - Terminal connectors should be replaced
Battery dead cell - Replace the battery
Starter turns slowly
Battery power is low - Battery needs to be recharged
Battery drains quickly - Service charging system or change battery
Battery terminals are corroded or wires are disconnected - Check cables and replace or service terminals
Starter does not work
Battery is low or faulty - Charge or replace the battery
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly
Battery voltage is low - Charge the battery
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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