________________________________________________________________________________

John Deere 320 - Problems and Solutions

John Deere 320 Engine Troubleshooting

Tractor engine doesn't start

No gasoline in tank - Fill fuel up.
Improper fuel grade - Change fuel.
Old gas - Drain gasoline and change with fresh.
Dirty fuel lines - Inspect and clean.
Spark plug defective - Check wires connection.
Spark plug damaged - Change as required.
Plugged fuel filter - Fit new filter.
Faulty safety switch - Change damaged switch.
Carburetor is clogged - Clean the carburetor.
Test fuel transfer pump output. Test compression.

Engine starts hard

Spark plug malfunction - Test spark and change as required.
Carburetor not adjusted - Adjust according to instructions.
Fuel lines are clogged - Clean the system carefully.
Choke cable not adjusted properly - Checking and adjusting.
Stale or incorrect gasoline - Pour quality fuel.
Electrical wires are damaged - Inspect 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.
Ignition setting defective - Check spark plug and ignition.
Choke cable sticks - Repair or replace.
Air cleaner dirty - Replace air cleaner.

Engine misses

Spark plug fail - Test spark plug.
Carburetor problems - Test and repair.
Ignition coil air gap incorrect - Check and adjust ignition coil air gap.

Engine overheats

Engine runs under excessive load - Reduce loads.
Cooling fins or air inlet plugged - Clean dirty components.
Too little or too much oil - Inspect oil pump for damage or worn.
Poor quality oil - Change oil.
Inspect crankshaft to main bearing clearance.
Idle speed problems - Adjust carburetor idle mixture screw.

Engine doesn't idle speed

Spark plug not gapped correctly - Adjust spark plug gap.
Spark plug worn out - Inspect the spark, change if necessary.

JD 320 Engine knocks

Low octane gasoline - Use correct gasoline.
Excessive engine load - Reduce loads.
Lack of engine oil - Check oil level and add if necessary.
Low engine speed - Adjust carburetor.
Cylinder bore and rings are wear - Replace damaged parts.
Check for engine overheating from plugged cooling fins.
Checking and adjusting valve clearance.
Check for loose or worn connecting rods.

Engine backfires

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

Engine loses power

Engine overheats - Replace air cleaner.
Overfilling engine oil - Excess oil must be drained.
Defective fuel pump - Inspect and repair fuel pump.
Governor is damage - Inspect and repair governor.
Inspect and repair carburetor.
Test engine compression.

Excessive Fuel Consumption

Insufficient choke opening - Replace throttle cable.
Carburetor malfunction - Check and adjust carburetor.

Exhaust with black smoke

Air filter element clogged - Clean or change filter.
Choke partially engaged - Inspect and adjust throttle.
Check and adjust carburetor float level.

John Deere 320 Electrical System Troubleshooting

Starter motor will not turn engine

Fuse is defective - Installing new fuse.
Terminals are severely corroded and heat up - Clean terminals.
Low battery voltage - Charge the battery.
Ignition lock problems - Change the lock.
Faulty starter - Repair or replace.
Wires disconnected - Change wiring.

Battery will not charge

Battery cells defective - Change the battery.
Battery terminals and cables are dirty - Change or clean cable.

Lighting does not function

Headlight wire connector disconnected.
Check lamps.
Wiring short circuit.

JD 320 Machine Problems

The machine vibrates

Attachment drive belts worn or damaged - Check and replace worn belt.
Traction drive belt damage - Inspect and replace traction belt.
Dirt on drive sheaves - Installing a new pulley.
Bent cutting blade or no balance - Balance the blades or replace.

Engine runs but tractor won't move

Parking brake holds the tractor - Disengage the park brake.
Bypass valve pulled out - Set bypass valve to the off position.
Blade becomes loose - Fasten the blades securely.
Blades are unbalanced - Check blade balancing.
Too little transmission oil - Fill transmission with oil.

John Deere 320 Lawn Mower Troubleshooting

Clogged discharge chute

Lawn mower is driving too fast - Operate the mower at low speed.
High grass - Adjust the mower to a lower cutting height.
Grass too wet - Do not mow when grass is wet.
Engine rpm reduced - Adjust carburetor to higher rpm.
Loss of airflow - Set higher revs.
Low cutting height - Change cutting height.
Belt is loose - Reinstall the belt properly.

Patches of grass uncut

Cutting deck clogging - Mower deck needs cleaning.
Defective blade - Check and replace the blade.
Mower deck low - Checking and adjust deck height.
Grass bag too full - Clean grass bag.
Travel speed too fast - Need to reduce speed.

Slipping drive belt

Pulley is dirty - Recommend cleaning the sheaves.
Drive belt damage - Check and replace belt.
Belt tension improper - Adjust belt tension.

The lawn mower vibrates excessively

Debris in sheaves or on mower deck - Remove debris from the pulley or deck.
Sheaves or belt faulty - Replace defective components.
Pulleys or belt misaligned - Check and centering.
The blades are unbalanced - Blade balance required.

Blade strips grass

Cutting height incorrect - Set the correct cutting height.
Mower height wheels not adjusted - Adjust mower deck wheels.
Tires inflated insufficient - Inflate tires as required.
Higher blade speed - Blade speed required.
Bent mower blades - Remove bent blade and fit new one.

Uneven cutting results

Mower deck low - Level mower deck.
Tires inflated insufficient - Need to inflate tires.
Wrong rollers position - Check the wheel heights.
Ground speed too high - Choose recommended speed.
Blades blunt - 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