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John Deere LA135 Troubleshooting

John Deere LA135 Engine Problems

Tractor engine won't start

Fuel tank is empty - Fill fuel up.
Low-quality gasoline - Use quality fuel.
Old gasoline - Drain fuel and fill up fresh.
Water or air in fuel system - Remove air or water from system.
Defective spark plug wires - Install new spark plug wires.
Spark plug damaged - Inspect ignition spark.
Plugged fuel filter - Fit new filter.
Faulty safety switch - Change damaged switch.
Carburetor is not adjusted - Check carburetor float adjustment.
Inspect and adjust throttle cable. Test crankcase vacuum.

Engine is difficult to start

Spark plug malfunction - Check the spark and change defective spark.
Carburetor incorrectly set - Set carb correctly.
Dirt in fuel lines - Servicing fuel system.
Choke cable damaged - Replacement required.
Stale or incorrect gasoline - Pour quality gasoline.
Electrical wiring worn out - Inspect and replace wiring as needed.
Starter is not working - Check the starter and replace defective components.

Engine stalling, surging or running rough

Clogged cooling fins - Remove dirt from cooling fins.
Loose electrical connections - Check and replace damaged connections.
Ignition adjust incorrect - Inspect spark plug and ignition system.
Throttle cable sticks - Repair or replace.
Air cleaner blocked - Clean or change air filter.

Engine misses under load

Spark plug worn out - Inspect spark plug wire.
Carburetor defective or not adjusted - Repair or adjust.
Ignition coil not working - Replace defective component.

Engine overheating

Excessive engine load - Reduce the load.
Air intake screen blocked - Clean clogged components.
Too much or too little oil - Inspect oil pump for damage or worn.
Incorrect engine oil viscosity - Change engine oil.
Check internal bearing clearance.
Idle speed problems - Adjusting fast idle speed.

Engine will not idle

Poor spark plug contact - Adjust spark plug gap.
Spark plug wear - Check the spark and change defective spark.

JD LA135 Engine knocks

Low octane gasoline - Change gasoline.
Excessive engine load - Reduce loads.
Lack of engine oil - Add to required level.
Engine is running at low revs - Adjust the required speed.
Piston rings and cylinder bore are wear - Replace damaged parts.
Check for engine overheating from plugged cooling fins.
Check and adjust crankshaft end play.
Check for worn crankshaft or camshaft bearings.

Engine back-fire

Checking spark plug.
Adjust or replace throttle.
Checking and adjusting carburetor.
Inspect and adjust ignition coil air gap.
Inspect for sticking valves.
Check and adjust valve clearance.
Check flywheel key.

Loss of power

Engine overheats - Check air cleaner for plugged condition.
Excess engine oil - Remove excess oil.
Fuel pump problems - Repair or replace fuel pump.
Governor is damage - Repair or replace governor.
Inspect carburetor for plugged passages.
Test engine compression.

Excessive fuel consumption

Insufficient throttle opening - Replace throttle cable.
Incorrect carburetor adjustment - Adjust or repair carburetor.

Black exhaust smoke

Air cleaner element clogged - Clean or change filter.
Throttle is partially engaged - Inspect and adjust throttle.
Check oil fill dipstick O-ring seal or cracked cap.

John Deere LA135 Electrical Troubleshooting

Starter does not run

Main fuse malfunction - Check and replace.
Terminals are severely corroded and heat up - Clean terminals.
Battery is discharged - Battery charging required.
Ignition switch defective - Replace switch.
Starter is damaged - Replace or repair.
Wiring damage - Replace electric wires.

Battery will not charge

One or several cells defective - Fit new battery.
Poor contact between cable and battery pole - Clean or replace cable.

No Lights work

Headlight wire connector disconnected.
Loose or burned out bulb.
Wiring short circuit.

JD LA135 Machine Troubleshooting

The machine vibrates

Implements drive belts damaged or worn - Inspect and replace damaged belt.
Worn traction drive belt - Installing new driven belt.
Dirt on drive sheaves - Clean the sheaves.
The mower deck blades are bent or unbalanced - Tighten and balance blade.

Machine does not move while engine is running

parking brake blocks the tractor - Release the parking brake.
Bypass valve lever in the push position - Deactivate the bypass valve.
Loose lawnmower blades - Check mower blades and fasten as required.
Poor blade balancing - Balance the mower blades correctly.
Too little transmission oil - Check transmission oil lever.

John Deere LA135 Mower Deck Troubleshooting

Discharge Chute Clogged

Lawn mower is driving too fast - Choose recommended speed.
High grass - Adjusting cutting height.
Grass too wet - Do not use the mower if grass is wet.
Low engine speeds - The choke is not fully opening.
Loss of airflow - Adjust to high revs.
Lack of cutting height - Adjust to higher cutting.
Belt is loose - Reinstall the belt properly.

Lawn mower leaving uncut grass

Mower deck clogged - Need to clean the mower deck.
Blades dull or damaged - Install new blade.
Mower deck is low from ground - Level mower deck.
Grass bagger overfilled - Empty bagger.
Speed too high - Operate the mower at low speed.

Belt Slipping

Dirt in the pulley - Clean or replace.
Drive belt wear - Fit new belt.
Belt tension is incorrect - Check belt tension.

The lawn mower vibrates excessively

Mower clogged or in pulleys - Clean pulley and deck from debris.
Worn sheaves or belt - Replace worn parts.
Belt or pulleys no adjustment - Inspect and centering.
Incorrect blade balancing - Balance blades properly.

Blades scalp grass

Incorrect height cutting - Set the correct cutting height.
Mower wheel height incorrect - Adjust wheel heights correctly.
Low tire pressure - Check and inflate the tires.
Blades speed too fast - Adjust the blade speed.
Blades are bent - Replace blades.

Uneven cutting results

Mower deck not leveled properly - Adjust and level the deck height.
Tire pressure unequal - Inflate tires as required.
Incorrect rollers height - Adjust wheel heights correctly.
Gear too high - Choose recommended speed.
Blades worn - Sharpen the blade or install a new one.

JOHN DEERE TRACTORS ATTACHMENTS
420	430	455	790	990
X300	X320	X330	X350	X475
X485	X500	X540	X570	X590
X700	X720	X738	X758	1023E
2025R	2210	2520	3025E	3032E
3038E	3038R	3039R	3046R	3203
3320	3520	4052R	4066R	4100
4105	4115	4200	4310	4320
4400	4410	4520	4600	4720

JD TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R