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John Deere LX277 Problem Solving

John Deere LX277 Engine Troubleshooting

Engine will not start

No gasoline in tank - Fill gasoline up.
Wrong grade of gasoline - Change gasoline.
Stale gas - Drain gasoline and fill fresh up.
Fuel system clogged - Repair or replace.
Spark plug defective - Inspect and change if necessary.
Spark plug damaged - Installing new spark plug.
Plugged fuel filter - Fit new filter.
Brake pedal not depressed - Press the brake pedal.
Carburetor problems - Carburetor diagnostics required.
Inspect starter cranking speed RPM. Compression problems.

Gas engine hard to start

Faulty spark plug - Test spark and change as required.
Carburetor incorrectly set - Set carb correctly.
Fuel pipes are clogged - Servicing fuel system.
Throttle cable damaged - Change the cable.
Stale or improper fuel - Fill in correct fuel.
Electrical wiring worn out - Checking and replace.
Starter fault - Inspect the starter and change defective parts.

Rough running engine

Cooling fins blocked - Clean and wash cooling fins.
Loose electrical connections - Check and repair damaged connections.
Ignition adjustment lost - Inspect spark plug and ignition system.
Choke cable sticks - Check and change if required.
Air filter dirty - Change air cleaner.

Engine stops or misses

Spark plug malfunction - Inspect spark plug wire.
Carburetor malfunction - Inspect and overhaul.
Ignition coil is damaged - Inspect ignition coil and change if required.

Engine overheating

Excessive engine load - Reduce the load.
Cooling fins or air inlet plugged - Clean dirty components.
Too much or too little oil - Inspect oil level.
Poor quality oil - Change engine oil.
Check connecting rod to crankshaft bearing clearance.
Fast idle speed - Adjust carburetor idle mixture screw.

Engine does not idle

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

JD LX277 Engine knocking

Stale or low octane fuel - Use proper gasoline.
Engine overload - Reduce loads.
Low oil level - Add to required level.
Low engine speed - Adjust the required speed.
Cylinder bore and rings worn out - Inspect and replace if required.
Check for engine overheating from plugged cooling fins.
Check and adjust valve clearance.
Inspect for loose or wear connecting rods.

Engine backfires

Check spark plug and replace if necessary.
Inspect and adjust choke.
Test carburetor, adjust if necessary.
Checking and adjusting ignition coil air gap.
Inspect for sticking valves.
Check and adjust valve clearance.
Inspect flywheel key.

Insufficient engine power

Engine overheating - Change air filter.
High engine oil - Excess oil must be drained.
Fuel pump broken - Testing fuel pump output.
Governor problems - Inspect and adjust governor.
Check and overhaul carburetor.
Test engine compression.

Excessive fuel consumption

Throttle does not open well - Replace choke cable.
Incorrect carburetor adjustment - Check carburetor float adjustment.

Emits black smoke

Air cleaner element clogged - Clean or replace filter.
Choke partially engaged - Check and repair throttle.
Check oil fill dipstick O-ring seal or cracked cap.

JD LX277 Electrical System Troubleshooting

Starter motor will not turn engine

Blown main fuse - Check and change.
Terminals are severely corroded and heat up - Clean contacts.
Battery not charged - Battery charging required.
Ignition switch defective - Change the lock.
Faulty starter - Replace or repair.
Wires disconnected - Replace wiring.

Battery does not charge

Battery cells fails - Replace the battery.
Bad contact between battery pole and cable - Inspect and Clean.

Lights do not work

Light plug disconnected.
Replace light bulbs.
Short-circuit in cable.

John Deere LX277 Machine Troubleshooting

Excessive tractor vibration

Equipment driven belt worn out - Inspect and change damaged belt.
Traction drive belt damage - Check and replace belt.
Dirt on drive sheaves - Installing a new pulley.
The mower deck blades are bent or unbalanced - Change defective blades.

Machine does not move while engine is running

The parking brake is locked - Unlock park brake.
Bypass valve pulled out - Deactivate the bypass valve.
Loose lawnmower blades - Inspect and fasten securely if necessary.
Blades are unbalanced - Check blade balancing.
Lack of oil in transmission - Add transmission oil.

John Deere LX277 Mower Deck Troubleshooting

Discharge Chute Clogged

Speed too high - Choose recommended speed.
Grass Too Tall - Adjust the mower to a lower cutting height.
The grass is wet - Do not use the mower if grass is wet.
Engine is running at too low speed - Adjusting carburetor for higher rpm.
Airflow restriction - Check engine rpm.
Mower deck set to low cutting - Change cutting height.
Belt fitted incorrectly - Check belt installation.

Patches of grass uncut

Debris in mower deck - Deck cleaning required.
Defective blade - Check and replace the blade.
Deck level is too low - Adjust and level the deck height.
Bagger too full - Clean grass bag.
Speed is very fast - Do not use high speed.

Slipping drive belt

Debris in pulleys - Clean or replace.
Drive belt wear - Check and replace belt.
No belt tension required - Check and adjusting belt tension.

Mower vibrates

Mower clogged or in pulleys - Clean deck and pulley from debris.
Sheaves or belt faulty - Fit new components.
Misaligned belt or pulley - Check and centering.
No blade balance adjustment - Balance blades properly.

Blades scalping grass

Cutting height improper - Check and adjust height.
Mower wheel height incorrect - Adjust front or back wheel height.
Insufficient tire pressure - Increase tire pressure.
Faster mower blade speeds - Balance mower speed.
Blades are bent - Replace blades.

Uneven Cut

Deck too low - Deck leveling required.
Tire pressure unequal - Increase tire pressure.
Rollers not positioned properly - Check the rollers heights.
Travel speed too high - Operate the mower at low speed.
Mower blades blunt - Check and replace the 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