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John Deere X304 Problems and Solutions

John Deere X304 Engine Troubleshooting

Engine not starting

Empty fuel tank - Fill fuel up.
Incorrect fuel grade - Use quality fuel.
Old gas - Drain gasoline and change with fresh.
Dirty fuel system - Check and clean.
Spark plug wire is loose or disconnected - Install new spark plug wires.
Spark plug not working - Spark plugs need to be replaced.
Dirty fuel filter - Change fuel filter.
Faulty safety switch - Change damaged switch.
Carburetor is not adjusted - Check carburetor float adjustment.
Inspect and adjust choke. Test crankcase vacuum.

Engine is difficult to start

Spark plug malfunction - Inspect the spark, change if necessary.
Carburetor components worn out - Repair or replace parts.
Fuel lines are clogged - Service required.
Throttle cable worn - Install new throttle cable.
Stale or improper gasoline - Pour quality fuel.
Electrical connections are damaged - Inspect and replace wiring as needed.
Starter is not working - Check starter, repair or replace.

Engine runs roughly

Clogged cooling fins - Clean and wash cooling fins.
Loose electrical contacts - Inspect and replace defective contacts.
Ignition adjust incorrect - Test ignition and spark plug.
Choke cable sticks - Check and change if required.
Air cleaner element plugged - Change air cleaner.

Engine stops or misses

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

Engine overheating

Engine runs under excessive load - Reduce loads.
Cooling fins or air inlet plugged - Clean dirty components.
Engine oil low or too high - Check oil level. Test engine oil pressure.
Low quality engine oil - Change engine oil.
Check connecting rod to crankshaft bearing clearance.
Idle speed problems - Adjust fast idle.

Engine doesn't idle speed

Spark plug is loose - Tighten the spark plug correctly.
Faulty spark plug - Check the spark and replace defective spark.

JD X304 Engine knocks

Low octane fuel - Use correct fuel.
Engine overloaded - Reduce the load.
Low oil level - Add engine oil.
Engine is running at low revs - Adjust the speed.
Piston rings and cylinder bore worn - Check cylinder bore and rings for wear.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Check for worn crankshaft or camshaft bearings.

Engine backfires

Check spark plug and replace if necessary.
Adjust or replace throttle.
Check and adjust carburetor.
Inspect and adjust ignition coil air gap.
Inspect for sticking valves.
Check valve clearance, adjust if required.
Check flywheel key.

Engine lacks power

Engine overheating - Air cleaner element plugged.
Engine oil overfilled - Drain excess oil.
Fuel pump broken - Inspect and repair fuel pump.
Faulty governor - Inspect and repair governor.
Check carburetor float adjustment.
Checking engine compression.

Engine getting too much fuel

Choke doesn't open well - Adjust choke cable.
Carburetor is not adjusted - Check carburetor float adjustment.

Emits black smoke

Air filter element plugged - Clean or change filter.
Throttle not fully engaged - Inspecting and adjusting throttle.
Check for correct main jet for elevation.

JD X304 Electrical System Troubleshooting

Starter doesn't work or will not turn engine

Blown fuse - Check and replace.
Battery terminals are corroded - Clean terminals.
Battery not charged - Battery charging required.
Ignition switch defective - Change switch.
Starter is damaged - Change the starter.
Wiring damage - Replace wiring.

Battery does not charge

Battery cells fails - Install new battery.
Poor contact between cable and battery pole - Clean or change cable.

Lighting does not function

Light plug disconnected.
lamp defective.
Inspect electrical wires for short- circuit.

John Deere X304 Machine Problems

Tractor vibrates excessively

Implements driven belt damaged or worn - Belt replacement required.
Traction drive belt damage - Check and change worn belt.
Drive sheaves are dirty - Fit new pulley.
Unbalancing or bending of blades - Replace damaged blades.

The engine is running but tractor is not moving

Parking brake holds the tractor - Release the park brake.
Bypass valve lever activated - Deactivate the bypass valve.
Blades loose - Checking blades for loose bolts.
Improper blade balance - Check mower blade balancing.
Transmission oil is insufficient - Fill transmission with oil.

John Deere X304 Lawn Mower Troubleshooting

Plugged discharge chute

Speed too high - Choose recommended speed.
Too high grass for mowing - Adjust the mower to a lower cutting height.
The grass is wet - Wait for the grass to dry.
Engine rpm too low - Open throttle wide.
Loss of airflow - Adjust to high revs.
Low cutting height - Adjust cutting settings.
Belt is loose - install belt as required.

Streaking of uncut grass

Mower deck clogged - Need to clean the mower deck.
Damaged blade - Check and replace the blade.
Deck too low - Level mower deck.
Grass bagger overfilled - Empty bagger.
Speed is very fast - Use slower speed.

Belt slips

Dirt in the pulley - Need to clean the pulley.
Belt is loose - Install new belt.
Low belt tension - Check and adjusting belt tension.

The lawn mower vibrates excessively

Debris in pulleys or in mower deck - Remove debris from the pulley or deck.
Worn sheaves or belt - Replace damaged parts.
Pulleys or belt misaligned - Check and adjust.
Incorrect blade balancing - Balance the blades.

Blades scalp grass

Cutting height incorrect - Set the correct cutting height.
Mower wheel height incorrect - Adjust rear or front wheel height.
Tires inflated insufficient - Check and inflate the tires.
Faster mower blade speeds - Balance mower speed.
Bent blades during operation - Install new blades.

Uneven cutting results

Deck level is too low - Checking and adjust deck height.
Tires inflated insufficient - Inflate tires as required.
Rollers not positioned properly - Check the rollers heights.
Traveling too fast - Don't use fast speed.
Mower blade worn or bent - Check for blade damage and replace if necessary.

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