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John Deere LA135 Troubleshooting
The
John Deere LA135 is a 2-wheel drive lawn tractor from LA105 series. This model
was manufactured between 2008 and 2010.
The components of John Deere LA135 powerline system: 40 cu.in (656 cc)
Briggs and Stratton 407777 4-cycle 2-cylinder OHV vertical-shaft
air-cooled gasoline engine with a rated power of 22 hp (16.4 kW), and
Tuff Torq T40 belt-driven hydrostatic transmission with infinite forward
and reverse gears. Max. forward speed - 5.5 mph (8.8 kph), maximum
reverse speed - 3.2 mph (5.1 kph).
The tractor is equipped with a manual steering system, disc brakes,
15x6.00-6 front tires, and 20x10.00-8 rear tires. The wheelbase is 49"
(1240 mm). The John Deere LA135 is compatible with the following
attachments: a 42" mid-mount 2-blade mower deck with manual lifting
system and cutting height of 1.0-4.0 inches (25-102 mm), 46" front blade
with lift height of 6" (150 mm), or 44" front-mount two-stage snow
blower with clearing height of 18" (450 mm).
Engine Troubleshooting |
Engine starts hard or will not start |
Fuel tank is empty - Fill it up |
Improper fuel grade - Change gasoline |
Fuel system clogged - Repair or replace |
Spark plug wire is disconnected or loose - Check the spark plug wire connection, repair or replace |
Spark plug is defective - Change spark plug as required |
Clogged fuel filter - Install new filter |
Brake pedal not depressed - Press the brake pedal |
Carburetor problems - Carburetor diagnostics required |
Engine has low compression - Check cylinder block and replace defective parts |
Worn or improperly adjusted choke cable - Adjust properly or replace the cable |
Air intake screen is plugged - Need to wash or clean |
Ignition system malfunction - Test ignition and replace failed parts |
Stuck or defective throttle cable - Change or clean the cable |
Dirty air filter element - Replace or clean air filter |
Fuel pump is faulty or clogged - Test fuel pump and change if necessary |
Engine starts and stops immediately |
Faulty spark plug - Change spark plug as required |
Defective or dirty carburetor - Service or change carburetor |
Damaged ignition coil - Replace ignition coil as necessary |
Broken or loose valve springs - Install new valve springs |
Stuck valves - Service the valves |
Lack of engine oil - Checking oil level and add if necessary |
Engine is under excessive load - Reduce the load |
Cooling fins are plugged - Need to wash or clean |
Carburetor fuel mixture is too lean - Set the carburetor correctly |
Ignition timing is improper - Adjust ignition timing as required |
Valve setting is incorrect - Set the valves properly |
Abnormal engine noise or knocking |
Low octane fuel - Use proper gasoline |
Engine overload - Reduce load |
Low engine oil level - Need to add engine oil |
Low idle speed adjustment is incorrect - Test and adjust |
Dirty or faulty fuel pump - Clean or change fuel pump |
Worn main bearings or crankshaft - Have bearings or crankshaft replaced |
Valve clearance is improper - Need to adjust valve clearance |
Piston rings or cylinder bore are worn - Replace defective parts |
Engine power is insufficient |
Incorrectly adjusted or dirty carburetor - Service or correctly adjust carburetor |
Dirty air filter element - Service or replace air filter |
Fuel pump is faulty or clogged - Service or replace fuel pump |
Defective ignition - Check ignition and replace faulty components |
Blown cylinder head gasket - Replace the gasket as required |
Valves are stuck or burned - Replace or clean valves |
Push rod is worn or bent - Install a new push rod |
Cylinder block parts are worn out - Change defective components |
Excessive fuel consumption |
Insufficient throttle opening - Adjust or replace throttle cable |
Incorrect adjustment of carburetor main jet - Adjust it correctly |
Spark plug is defective or loose - Spark plug need to be tightened or replaced |
Valves are worn, burned or stuck - Clean or replace valves |
Worn piston, rings, or sleeve - Replace faulty components |
Improper valve clearance - Need to adjust valve clearance |
Engine consuming too much oil |
Defective seals or gaskets - New components need to be installed |
Damaged valve guides or valve stems - Install new valves |
Seized or wear piston rings - Piston rings need to be replaced |
Piston or cylinder liner is scored - Check liner and piston, change as required |
Breather hose or pipe is blocked - Change or clean |
Hydrostatic Transmission Troubleshooting |
Hydrostatic transmission is making noise |
Speed control linkage is defective or unadjusted - Adjust or repair linkage |
Transmission overload - Load needs to be reduced |
Insufficient oil level or contaminated oil - Fill to required level or change the transmission oil |
Damaged or worn components of transmission - After disassembly and inspection, replace defective components |
Shift linkage is stuck or damaged - Clean or change linkage |
Hydrostatic pump is stuck or worn - Repair or replace pump |
Misadjusted or faulty transmission shift control components - Adjust properly or change |
Insufficient transmission oil - Fill the transmission housing to proper oil level |
Faulty or worn drive sheave - Change sheave |
Shift linkage is damaged or unadjusted - Adjust properly or change linkage |
Speed control linkage is worn or unadjusted - Repair or adjust linkage |
Transmission gaskets or seals are damaged - Seals and gaskets need to be replaced |
Final drive shaft leakage - Replace shaft seals |
Transmission case is cracked - Install a new transmission case |
Mower Deck Troubleshooting |
Mower vibrates excessively |
Drive sheave of mower deck is dirty or worn - Clean or change sheave |
Damaged or loose drive belt - Change belt or adjust belt tension |
Bent or unbalanced cutting blades - Balance blades or replace it |
Blade bolts are not tightened well - Tighten bolts as required |
Discharge chute is regularly plugged |
Mowing speed is too high - Need to slow down |
Long grass - Must be set to low cutting height |
Low engine speeds - Throttle is not fully open |
Mower deck set to low cutting - Use correct cutting height |
Incorrect mower drive belt installation - Check drive belt for correct installation |
Mower deck is clogged - Mower deck needs to be cleaned |
Blades are too dull - Sharpen the blades |
Worn or damaged blades - Install new blades |
High ground speed - Need to slow down |
Cutting level is too low - Use correct cutting height |
Filled bagger - Clean bagger |
Bumpy or not smooth lawn - Roll or level the lawn |
Mower cuts too low - Raise the cutting height |
Ground speed is too fast - Operate at slower speed |
Deck level is not correct - Adjust mower deck level properly |
Blades are bent or worn - Blades must be changed |
Low tire inflation - Inflate tires correctly |
Tire pressure is too low - Need to inflate tires |
Improperly leveled mower deck - Level the deck properly |
Blades are not sharp - Sharpen the blades |
Worn or defective blades - Install new blades |
Deck is plugged with grass - Need to clean the mower deck |
Damaged mower deck shell - Replace or rebuild mower deck |
Mower spindle is faulty or loose - Install new spindle or repair it |
Electrical Troubleshooting |
Battery cannot be charged |
Loose or corroded cable connections - Tighten or clean electrical wiring connections |
Faulty battery terminal connectors - Terminal connectors need to be changed |
Dead cell in battery - Use a new battery |
Low battery capacity - Low battery charging, charge as required |
Battery discharges quickly - Service or change the battery |
Faulty battery terminals or disconnected cables - Connect wiring correctly or install new terminals |
Battery is low or faulty - Battery needs to be recharged or replaced |
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required |
Battery power is low - Low battery charging, charge as required |
Spark plug gapped improperly or faulty - Clean and gap or replace |
Solenoid or starter motor failure - Repair starter or replace solenoid |
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Lawn and Garden Tractors Technical Specs |