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John Deere 325 - Problem Solving

John Deere 325 Engine Troubleshooting

Tractor engine won't start

Fuel tank is empty - Fill it up.
Wrong grade of gasoline - Change fuel.
Stale fuel - Drain gasoline and fill fresh up.
Clogged fuel system - Remove clogging.
Defective spark plug wires - Install new spark plug wires.
Faulty spark plug - Replace as required.
Clogged fuel filter - Change fuel filter.
Defective safety switch - Replace if required.
Carburetor malfunction - Check and repair as required.
Check and adjust governor linkage. Test crankcase vacuum.

Gas engine is difficult to start

Spark plug malfunction - Test spark and replace as required.
Carburetor incorrectly set - Set carb correctly.
Fuel lines are clogged - Clean the system carefully.
Throttle cable damaged - Change the cable.
Stale or improper gasoline - Pour quality fuel.
Loose or corroded electrical connections - Check and replace wires if necessary.
Starter fault - Test starter and repair if necessary.

Rough running engine

Cooling fins plugged - Clean and wash cooling fins.
Loose electrical connections - Inspect and repair defective contacts.
Incorrect ignition settings - Check ignition system and adjust as required.
Choke cable sticks - Check and repair.
Air cleaner dirty - Replace air cleaner.

Engine misses

Spark plug failed - Inspect spark plug wire.
Carburetor malfunction - Inspect and overhaul.
Ignition coil not working - Replace defective component.

JD 325 Engine overheating

Engine overloaded - Reduce the load.
Air intake screen plugged - Clean dirty components.
Too little or too much oil - Inspect oil level.
Incorrect engine oil viscosity - Change oil.
Check internal bearing clearance.
Too Fast idle - Adjust fast idle.

Engine doesn't idle speed

Spark plug is loose - Tighten the spark plug correctly.
Spark plug failed - Inspect the spark, replace if necessary.

Engine knocking

Low octane fuel - Change fuel.
Engine overload - Reduce the load.
Lack of engine oil - Add to required level.
Engine runs at low revs - Adjust carburetor.
Cylinder bore or piston rings are damaged - Inspect cylinder bore or rings for worn.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Check for carbon build-up in combustion chamber.

Engine back-fire

Inspect spark plug and change if required.
Adjust or replace throttle.
Adjust carburetor idle mixture screw.
Inspect and adjust ignition coil air gap.
Inspect for sticking valves.
Checking and adjusting valve clearance.
Inspecting flywheel key.

Loss of power

Engine temperature too high - Change air filter.
Too much oil in engine - Excess oil needs to be drained.
Fuel pump problems - Test fuel pump output.
Faulty governor - Repair or replace governor.
Inspect carburetor for plugged passages.
Checking engine compression.

Engine uses too much fuel

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

Black smoke is emitted during operation

Air filter element plugged - Clean or change filter.
Choke not fully engaged - Replace or repair choke.
Checking and adjusting carburetor float level.

JD 325 Electrical System Troubleshooting

Starter does not run

Main fuse defective - Installing new fuse.
Battery contacts are corroded - Clean terminals.
Weak battery - Charge the battery.
Ignition switch is damaged - Change the lock.
Starter fault - Replace or repair.
Wiring damage - Reconnect wires.

Battery doesn't charge

One or more battery cells dead - Install new battery.
Battery cables and terminals are dirty - Replace or clean cable.

No Lights work

Light plug defective.
lamp defective.
Check wiring for short circuit.

John Deere 325 Machine Problems

Excessive tractor vibration

Equipment driven belt worn out - Inspect and replace damaged belt.
Traction drive belt damage - Installing new driven belt.
Drive pulley malfunction - Change if necessary.
Blades bent or out of balance - Tighten and balance blade.

The engine is running but tractor is not moving

Parking brake locked - Disengage the park brake.
Bypass lever is on - Disengage the bypass valve lever.
Mower blade could be loose - Inspect and fasten securely if necessary.
Unbalance in one or both blades - Inspect the blades and balance if necessary.
Transmission oil is low - Topping up oil.

John Deere 325 Mower Deck Troubleshooting

Plugged discharge chute

Lawn mower is driving too fast - Do not use high speed.
High grass - Use a shorter cutting height.
The grass is wet - Wait until later to cut.
Low engine speeds - Increase engine speed.
Airflow restriction - Set higher revs.
Mower cuts too low - Use higher cutting.
Belt installed improperly - Check belt installation.

Patches of grass uncut

Debris in mower deck - Check cutting deck and clean if necessary.
Excessive blade wear - Checking for blade fault and change if required.
Mower deck is low from ground - Deck leveling required.
Grass bag too full - Empty the grass bag.
Travel speed too fast - Need to reduce speed.

Belt slips

Debris in pulleys - Pulley cleaning required.
Worn belt - Inspect and replace worn belt.
Low belt tension - Check and adjusting belt tension.

Mower vibrates

Mower clogged or in pulleys - Clean pulley and deck from debris.
Mower belt or sheave damaged - Replace defective parts.
Misaligned belt or pulley - Inspect and align.
Incorrect blade balancing - Balance blades properly.

Blades scalping grass

Cutting height improper - Raise cutting height.
Mower height wheels not adjusted - Adjust wheel heights correctly.
Tires inflated insufficient - Need to inflate tires.
Faster mower blade speeds - Adjust the blade speed.
Blades are bent - Remove bent blade and fit new one.

Uneven Cut

Deck level is too low - Level mower deck.
Insufficient tire pressure - Check and inflate the tires.
Wrong rollers position - Adjust wheel heights correctly.
Speed too high - Don't use fast 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