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John Deere LA150 Tractor Troubleshooting

John Deere LA150 Engine Problems

Tractor engine will not start

Empty gas tank - Fill it up.
Wrong grade of gasoline - Change fuel.
Stale fuel - Drain fuel and fill up fresh.
Clogged fuel system - Remove clogging.
Spark plug wire is loose or disconnected - Inspect and change if necessary.
Spark plug damaged - Replace as required.
Fuel filter is dirty - Replace fuel filter.
Safety contact for brake pedal defective - Install new part.
Carburetor malfunction - Check and repair as required.
Test fuel transfer pump output. Compression problems.

Engine starts hard

Spark plug fail - Check the spark and replace defective spark.
Problems with carburetor adjustment - Adjust as required.
Dirt in fuel pipes - Remove clogging from fuel pipes.
Choke cable not adjusted properly - Checking and adjusting.
Stale or improper fuel - Drain and add proper gasoline.
Electrical wiring worn out - Checking and replace.
Starter fault - Test starter and repair if necessary.

Engine stalling, surging or running rough

Clogged cooling fins - Clean cooling fins.
Loose electrical contacts - Check and repair damaged connections.
Incorrect ignition settings - Check ignition and adjust if necessary.
Choke cable sticks - Repair or change as needed.
Air filter blocked - Change air cleaner.

John Deere LA150 Engine misses under load

Spark plug failed - Test spark plug.
Carburetor is not adjusted correctly - Adjust carburetor as required.
Ignition coil not working - Replace defective component.

Engine overheats

Engine overloaded - Reduce the load.
Air intake screen plugged - Clean dirty components.
Engine oil low or too high - Inspect oil pump for damage or worn.
Improper engine oil viscosity - Change engine oil.
Check connecting rod to crankshaft bearing clearance.
Too Fast idle - Adjust carburetor idle mixture screw.

Engine doesn't idle speed

Spark plug not gapped correctly - Check spark plug gap.
Spark plug failed - Test spark and change as required.

JD LA150 Engine knocks

Stale or low octane fuel - Change gasoline.
Engine overload - Reduce the load.
Low oil level - Add to required level.
Low engine speed - Adjust carburetor.
piston rings or cylinder bore damaged - Check cylinder bore and rings for wear.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Checking for wear crankshaft or camshaft bearings.

Engine backfires

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

Insufficient engine power

Engine temperature too high - Replace air cleaner.
Overfilling engine oil - Drain excess oil.
Faulty fuel pump - Testing fuel pump output.
Governor problems - Checking and adjusting governor.
Inspect and repair carburetor.
Check engine compression.

Engine getting too much fuel

Choke doesn't open well - Replace choke cable.
Incorrect carburetor adjustment - Adjust carburetor.

Exhaust with black smoke

Air cleaner is dirty or oiled - Inspect and clean.
Throttle is partially engaged - Inspect and adjust choke.
Inspect carburetor needle valve and seat for wear or damage.

John Deere LA150 Electrical Troubleshooting

Starter does not function

Main fuse malfunction - Check and change.
Battery terminals are corroded - Clean terminals.
Battery not charged - Battery charging required.
Ignition lock problems - Replace switch.
Damaged starter - Install new starter.
Electrical wires are damaged - Reconnect wires.

Battery does not charge

Dead cell in the battery - Replace the battery.
Bad contact between battery pole and cable - Change or clean cable.

Lighting does not function

Light plug disconnected.
Replace light bulbs.
Check wiring for short circuit.

JD LA150 Machine Problems

Excessive tractor vibration

Equipment drive belts worn out - Belt replacement required.
Traction drive belt worn - Check and replace belt.
Dirt on driven pulley - Change if necessary.
Mower blades problem - Change as needed.

Machine does not move while engine is running

Parking brake locked - Disengage the park brake.
Bypass valve lever is engaged - Disengage the bypass valve lever.
Mower blades are loose - Fasten the blades securely.
Improper blade balance - Check blade balancing.
Too little transmission oil - Topping up oil.

John Deere LA150 Lawnmower Troubleshooting

Discharge Chute Plugged

Lawn mower is driving too fast - Use slower speed.
Grass too long - Adjust cutting height.
The grass is wet - Do not mow when grass is wet.
Low engine speeds - Increase engine rpm.
Restricted air flow - Adjust to high revs.
cut too low - Change cutting height.
Belt installed incorrectly - Reinstall the belt properly.

Patches of grass uncut

Debris in cutting deck - Deck cleaning required.
Defective blade - Inspect and fit new blade if required.
Deck too low - Checking and adjust deck height.
Grass bag overfilled - Clean bagger.
Speed is very fast - Need to reduce speed.

Belt slips

Sheave is dirty - Recommend cleaning the sheaves.
Belt is worn out - Inspect and replace worn belt.
Belt tension is incorrect - Correct belt tension.

Excessive mower vibration

Debris in mower deck or in pulleys - Clean deck and pulley from debris.
Mower belt or sheave damaged - Replace defective components.
Belt or pulleys out of alignment - Inspect and centering.
Incorrect blade balancing - Blade balance required.

Blades scalp grass

Cutting height improper - Raise cutting height.
Mower wheel height incorrect - Adjust rear or front wheel height.
Insufficient tire pressure - Need to inflate tires.
Blades speed too fast - Adjust the blade speed.
Bent mower blades - Replace blades.

Uneven cutting results

Mower deck not leveled properly - Leveling the mower deck.
Insufficient tire pressure - Inflate tires as required.
Wrong rollers position - Adjust mower deck wheels.
Operating at a faster ground speed - Choose recommended speed.
Mower blade worn or bent - Checking for blade fault and change if required.

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