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John Deere GT275 - Problem Solving

John Deere GT275 Engine Troubleshooting

Tractor engine starting problems

Empty fuel tank - Add gasoline.
Wrong fuel grade - Change fuel.
Old fuel - Drain gasoline and change with fresh.
Dirty fuel system - Check and clean.
Defective spark plug wires - Check wires connection.
Spark plug damaged - Clean, adjust gap or replace.
Fuel filter is clogged - Fuel filter needs changing.
Brake pedal not depressed - Press the brake pedal.
Carburetor is not adjusted - Check carburetor float adjustment.
Check and adjust governor linkage. Compression problems.

Engine hard starting

Faulty spark plug - Inspect the spark, replace if necessary.
Carburetor not adjusted - Adjust according to instructions.
Clogged fuel pipes - Service required.
Worn throttle cable - Replace as required.
Old or improper fuel - Pour quality fuel.
Electrical connection problems - Inspect and replace.
Failing starter - Check starter, repair or replace.

Rough running engine

Cooling fins plugged - Clean and wash cooling fins.
Loose electrical connections - Check and restore defective connections.
Incorrect ignition settings - Check ignition system and adjust as required.
Throttle cable sticks - Check and replace.
Air cleaner element plugged - Change air cleaner.

Engine misses

Faulty spark plug - Inspect spark plug wire.
Carburetor malfunction - Inspect and overhaul.
Ignition coil air gap incorrect - Check and adjust ignition coil air gap.

Engine overheats

Engine overloaded - Reduce the load.
Air intake screen clogged - Clean and wash dirty components.
Too little or too much oil - Add or drain oil.
Low quality engine oil - Change engine oil.
Check internal bearing clearance.
Too Fast idle - Adjust carburetor idle mixture screw.

Engine does not idle

Poor spark plug contact - Check tightness of spark plug.
Faulty spark plug - Inspect the spark, change if necessary.

JD GT275 Engine knocks

Low octane fuel - Use proper gasoline.
Engine overload - Reduce loads.
Lack of engine oil - add oil as required.
Low engine speed - Adjust carburetor as needed.
Cylinder bore or piston rings are damaged - Replace damaged parts.
Inspect for engine overheats from clogged cooling fins.
Check and adjust valve clearance.
Inspect for loose or wear connecting rods.

Engine backfires

Check spark plug for fouled.
Adjust or change the throttle.
Checking and adjusting carburetor.
Check and adjust ignition coil air gap.
Inspect for sticking valves.
Inspect and set valve clearance.
Inspect flywheel key.

Loss of power

Engine overheats - Air cleaner element plugged.
High engine oil - Excess oil needs to be drained.
Defective fuel pump - Test fuel pump output.
Defective governor - Checking and adjusting governor.
Inspect and repair carburetor.
Test engine compression.

Engine getting too much fuel

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

Emits black smoke

Air filter is dirty or oil soaked - Clean or change filter.
Choke partially engaged - Check and repair throttle.
Inspect carburetor needle valve and seat for wear or damage.

John Deere GT275 Electrical System Troubleshooting

Starter does not function

Main fuse defective - Install new fuse.
Battery contacts are corroded - Inspect and clean contacts.
Low battery voltage - Battery charging required.
Ignition lock defective - Replace switch.
Starter is damaged - Install new starter.
Wires disconnected - Reconnect wires.

Battery doesn't charge

One or several cells defective - Change the battery.
Battery cables and terminals are dirty - Clean or change cable.

Lights do not work

Headlight wire connector disconnected.
Check light bulbs.
Wiring damaged.

JD GT275 Machine Problems

Tractor vibrates too much or rattles excessively

Implements driven belt damaged or worn - Inspect and change damaged belt.
Traction drive belt worn - Inspect and replace traction belt.
Dirt on drive sheaves - Replace if necessary.
Unbalancing or bending of blades - Replace damaged blades.

Tractor doesn't move when engine runs

Parking brake is applied - Unlock park brake.
Bypass valve lever in the push position - Disengage the bypass valve lever.
Mower blades are loose - Fasten the blades securely.
Incorrect blade balance - Balance the mower blades correctly.
Transmission oil is low - Pour oil as required.

John Deere GT275 Mower Deck Troubleshooting

Plugged discharge chute

Speed too high - Use slower speed.
High grass - Adjust the mower to a lower cutting height.
The grass is wet - Do not mow when grass is wet.
Low engine speeds - Adjust carburetor to higher rpm.
Airflow restriction - Check engine rpm.
Lack of cutting height - Adjust cutting settings.
Belt installed improperly - Reinstall the belt properly.

Lawn mower leaving uncut grass

Debris in cutting deck - Mower deck needs cleaning.
Blades dull or damaged - Inspect and fit new blade if required.
Mower deck low - Level mower deck.
Grass bag overfilled - Clean grass bag.
Speed is very high - Do not use high speed.

Belt slips

Pulley is dirty - Recommend cleaning the sheaves.
Belt is worn out - Inspect and replace worn belt.
Poor belt tension - Check belt tension.

The lawn mower vibrates excessively

Debris in sheaves or on mower deck - Clean mower deck and sheave from debris.
Mower belt or sheave damaged - Replace defective parts.
Pulley or belt out of alignment - Inspect and align.
Blades are not balanced correctly - Blade balance required.

Blades scalp grass

Cutting height improper - Set the proper cutting height.
Mower rollers not adjusted improperly - Check the wheel heights.
Tires inflated insufficient - Increase tire pressure.
Higher blade speed - Blade speed required.
Bent mower blades - Install new blades.

Uneven cutting results

Mower deck not leveled properly - Leveling the mower deck.
Tire pressure uneven - Increase tire pressure.
Incorrect wheel height - Check wheel adjustment.
Traveling too fast - Operate the mower at low speed.
Mower blades dull - 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