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John Deere LA145 Troubleshooting

John Deere LA145 Engine Problems

Tractor engine not to start

Empty gas tank - Add gasoline.
Improper fuel grade - Change gasoline.
Old gasoline - Drain gasoline and fill fresh up.
Dirty fuel lines - Inspect and clean.
Spark plug wires are damaged - Check wires connection.
Faulty spark plug - Change as required.
Plugged fuel filter - Fit new filter.
Defective safety switch - Replace if required.
Carburetor problems - Carburetor diagnostics required.
Check starter cranking RPM. Test compression.

Gas engine starts hard

Spark plug failed - Inspect the spark, replace if necessary.
Carburetor components worn out - Repair or replace parts.
Clogged fuel pipes - Clean the system carefully.
Choke cable damaged - Replacement required.
Old or improper fuel - Pour quality fuel.
Loose or corroded electrical connections - Inspect and replace.
Starter is not working - Test starter and repair if necessary.

Engine runs roughly

Cooling fins plugged - Clean cooling fins.
Electrical connections damaged - Check and restore damaged connections.
Ignition setting defective - Check ignition system and adjust as required.
Throttle cable sticks - Repair or replace.
Air filter dirty - Clean air filter.

Engine misses

Spark plug failed - Test spark plug.
Carburetor problems - Test and repair.
Ignition coil is damaged - Inspect ignition coil and change if required.

JD LA145 Engine overheats

Engine runs under excessive load - Reduce loads.
Air intake screen clogged - Clean dirty components.
Engine oil high or too low - Add or drain oil.
Improper engine oil viscosity - Change oil.
Check internal bearing clearance.
Idle speed problems - Adjust carburetor idle mixture screw.

Engine will not idle

Spark plug is loose - Check tightness of spark plug.
Spark plug fail - Inspect the spark, change if necessary.

Engine knocking

Stale gasoline - Change gasoline.
Engine overloaded - Reduce loads.
Lack of engine oil - add oil as required.
Engine runs at low revs - Adjust carburetor as needed.
Cylinder bore and rings are wear - Replace defective components.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Checking for wear crankshaft or camshaft bearings.

Engine back-fire

Check spark plug for fouled.
Adjust or replace choke.
Checking and adjusting carburetor.
Checking and adjusting ignition coil air gap.
Check inlet and outlet valves.
Checking and adjusting valve clearance.
Inspecting flywheel key.

Engine does not develop full power

Engine temperature too high - Air cleaner element plugged.
Excess engine oil - Excess oil must be drained.
Fuel pump is damage - Inspect and repair fuel pump.
Governor not work - Checking and adjusting governor.
Check carburetor float adjustment.
Check engine compression.

Excessive fuel consumption

Choke didn't open fully - Check throttle cable.
Carburetor is not adjusted - Check carburetor float adjustment.

Exhaust with black smoke

Air cleaner element clogged - Clean or change filter.
Choke partially engaged - Check and repair throttle.
Inspect carburetor needle valve and seat for wear or damage.

JD LA145 Electrical System Troubleshooting

Starter doesn't work or will not turn engine

Blown main fuse - Check and replace.
Poor terminal connection - Clean terminals.
Low battery voltage - Battery charging required.
Ignition switch problems - Change switch.
Starter fault - Repair or replace.
Wires disconnected - Reconnect wires.

Battery doesn't charge

Faulty cell in battery - Replace the battery.
Poor contact between cable and battery pole - Change or clean cable.

No Lights work

Light connector defective.
Bulbs defective.
Check wiring for short circuit.

John Deere LA145 Machine Problems

The machine vibrates

Implements driven belt damaged or worn - Inspect and change damaged belt.
Traction drive belt worn - Check and replace belt.
Drive pulley malfunction - Fit new pulley.
Cutting blade loose or unbalanced - Replace damaged blades.

The engine is running but tractor is not moving

Parking brake is applied - Release the park brake.
Bypass valve lever in the push position - Disengage the bypass valve lever.
Mower blades are loose - Fasten the blades securely.
Incorrect blade balance - Check blade balancing.
Too much or too little oil - Topping up oil.

John Deere LA145 Mower Deck Troubleshooting

Discharge Chute Clogged

Lawn mower is driving too fast - Do not use high speed.
High grass - Adjust the mower to a lower cutting height.
Wet grass - Do not mow when grass is wet.
Engine runs at low revs - The choke is not fully opening.
Loss of airflow - Check engine rpm.
Mower deck set to low cutting - Adjust to higher cutting.
Belt is loose - Install the belt correctly.

Lawn mower leaving uncut grass

Debris in mower deck - Deck cleaning required.
Damaged or worn blade - Checking for blade fault and change if required.
Deck level is too low - Adjust and level the deck height.
Bagger too full - Empty the grass bag.
Travel speed too fast - Do not use high speed.

Belt slips

Pulley is dirty - Check and clean.
Belt is loose - Check and change damaged belt.
No belt tension required - Check and adjusting belt tension.

Excessive mower vibration

Mower clogged or in pulleys - Remove clogging from mower deck or sheaves.
Damaged mower belt or pulleys - Fit new components.
Misaligned belt or pulley - Inspect and centering.
Blades out of balance - Balance blades correctly.

Blade strips grass

Incorrect height cutting - Set the correct cutting height.
Mower wheel height incorrect - Check the wheel heights.
Tire pressure is uneven - Tire pressure required.
Blades speed too fast - Correct blades speed.
Blades are bent - Install new blades.

Uneven cutting results

Mower deck not level - Deck leveling required.
Tires inflated insufficient - Tire pressure required.
Incorrect rollers height - Adjust front or back wheel height.
Ground speed too fast - Choose recommended speed.
Blades dull - Install new blade.

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