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John Deere 314 Tractor Problems

Gasoline Engine Troubleshooting

John Deere 314 Engine not starting

Gas tank is empty - Add gasoline.
Incorrect fuel grade - Change gasoline.
Old fuel - Drain fuel and fill up fresh.
Dirty fuel system - Check and clean.
Spark plug defective - Check the spark plug wires.
Spark plug not working - Replace as required.
Fuel filter is dirty - Replace fuel filter.
Defective safety switch - Replace if required.
Carburetor problems - Carburetor diagnostics required.
Check and adjust governor linkage. Test compression.

Engine is difficult to start

Spark plug fail - Inspect the spark, change if necessary.
Wrong carburetor adjustment - Adjusting carburetor correctly.
Clogged fuel lines - Service required.
Choke cable damaged - Replacement required.
Stale or improper gasoline - Fill in proper gasoline.
Electrical connection problems - Inspect and change wires if required.
Starter is not working - Check starter, repair or replace.

Engine runs unevenly

Plugged cooling fins - Remove dirt from cooling fins.
Electrical contacts are damaged - Check and replace defective connections.
Incorrect ignition settings - Test ignition and spark plug.
Throttle cable sticks - Check and repair.
Air cleaner element plugged - Clean air filter.

Engine stops or misses

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

JD 314 Engine overheats

Excessive engine load - Reduce loads.
Air inlet or cooling fins blocked - Clean clogged components.
Too little or too much oil - Add or drain oil.
Low quality engine oil - Change engine oil.
Inspect crankshaft to main bearing clearance.
Idle speed problems - Adjust fast idle.

Engine doesn't idle speed

Spark plug is loose - Check spark plug gap.
Spark plug failed - Check the spark and replace defective spark.

Engine knocks

Stale fuel - Use correct gasoline.
Excessive engine load - Reduce loads.
Oil level low - Add engine oil.
Engine speed too low - Adjust the speed.
Cylinder bore or piston rings are damaged - Replace damaged parts.
Check for engine overheating from plugged cooling fins.
Check and adjust valve clearance.
Inspect for loose or wear connecting rods.

Engine back-fire

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

Engine lacks power

Engine overheating - Replace air cleaner.
Excess engine oil - Excess oil needs to be drained.
Fuel pump is not working properly - Testing fuel pump output.
Governor not work - Checking and adjusting governor.
Check carburetor float adjustment.
Checking engine compression.

Engine gets too much gas

Choke didn't open fully - Adjust throttle cable.
Incorrect carburetor adjustment - Adjust carburetor.

Exhaust with black smoke

Air cleaner element plugged - Check and clean.
Throttle not fully engaged - Inspecting and adjusting throttle.
Inspect carburetor needle valve and seat for wear or damage.

John Deere 314 Electrical System Troubleshooting

Starter motor will not turn engine

Blown main fuse - Check and replace.
Terminals are severely corroded and heat up - Inspect and clean contacts.
Battery is discharged - Need to charge the battery.
Ignition switch problems - Replace switch.
Faulty starter - Install new starter.
Wiring damage - Replace electric wires.

Battery does not charge

Battery cells fails - Change the battery.
No contact between cable and battery terminal - Inspect and Clean.

Lights do not work

Headlight wire connector disconnected.
Replace the lamps.
Wiring short circuit.

John Deere 314 Machine Problems

Excessive tractor vibration

Attachment driven belt worn or damaged - Check and replace worn belt.
Traction drive belt worn - Install new belt.
Drive sheaves malfunction - Clean or replace.
Bent cutting blade or no balance - Replace defective blades.

Tractor will not move with engine running

Parking brake locked - Release the park brake.
Bypass valve lever is engaged - Deactivate the bypass valve.
Loose lawnmower blades - Checking blades for loose bolts.
Blades are unbalanced - Check blades for damage and balance as required.
Too much or too little oil - Topping up oil.

JD 314 Lawnmower Troubleshooting

Discharge Chute Plugged

Travel speed too fast - Do not use high speed.
High grass - Use a shorter cutting height.
Grass too wet - Wait until the grass dries.
Engine rpm reduced - Open throttle fully.
Loss of airflow - Adjust to high revs.
Mower cuts too low - Adjust cutting settings.
Belt fitted incorrectly - Check belt installation.

Patches of grass uncut

Cutting deck clogging - Mower deck needs cleaning.
Blade wornout - Install new blade.
Deck level is too low - Leveling the mower deck.
Grass bag too full - Clean bagger.
Travel speed too fast - Use slower speed.

Slipping drive belt

Dirt in the pulley - Recommend cleaning the sheaves.
Drive belt damage - Check and replace belt.
Belt tension problems - Check belt tension.

John Deere 314 Mower vibrates

Debris in sheaves or on mower deck - Clean deck and pulley from debris.
Sheaves or belt faulty - Replace defective parts.
Pulley or belt out of alignment - Check and align.
Blades out of balance - Adjust blade balance.

Blade strips grass

Cutting too low - Raise cutting height.
Mower wheels not adjusted correctly - Adjust mower deck wheels.
Low tire pressure - Tire pressure required.
Higher blade speed - Adjust the blade speed.
Bent mower blades - Replace blades.

Uneven Cut

Mower deck not leveled properly - Level mower deck.
Tires inflated insufficient - Tire pressure required.
Incorrect rollers height - Check rollers adjustment.
Travel speed too high - Use slower speed.
Blades worn - Inspect and fit new blade 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