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John Deere G100 Tractor Problems

John Deere G100 Engine Problems

Tractor engine not to start

No gasoline in tank - Add fuel.
Low-quality gasoline - Use correct fuel grade.
Stale gas - Drain fuel and add fresh.
Dirty fuel lines - Inspect and clean.
Spark plug wires are damaged - Replace if necessary.
Faulty spark plug - Replace as required.
Fuel filter is plugged - Install new filter.
Safety contact for brake pedal defective - Install new part.
Carburetor is not working properly - Inspect and adjust.
Check starter cranking RPM. Test compression.

Engine hard starting

Spark plug worn out - Check the spark and change defective spark.
Wrong carburetor adjustment - Adjusting carburetor correctly.
Dirt in fuel lines - Clean fuel system components.
Choke cable damaged - Replacement required.
Stale or improper gasoline - Pour quality fuel.
Electrical wiring worn out - Inspect and change wires if required.
Starter problems - Check the starter and replace defective components.

Rough running engine

Cooling fins are clogged - Clean cooling fins.
Electrical contacts are damaged - Check and replace damaged connections.
Ignition system problems - Inspect spark plug and ignition system.
Choke cable sticking - Check and change if required.
Air filter dirty - Clean or change air filter.

John Deere G100 Engine misses

Faulty spark plug - Replace spark plug.
Carburetor defective or not adjusted - Repair or adjust.
Ignition coil defective - Test ignition coil and replace if necessary.

Engine overheats

Engine runs under excessive load - Reduce loads.
Cooling fins or air inlet plugged - Clean dirty components.
Too little or too much oil - Add or drain oil.
Incorrect engine oil viscosity - Change engine oil.
Check connecting rod to crankshaft bearing clearance.
Fast idle speed - Adjust carburetor for slower idle speed.

Engine doesn't idle speed

Poor spark plug contact - Tighten the spark plug correctly.
Faulty spark plug - Inspect the spark, change if necessary.

JD G100 Engine knocking

Stale fuel - Use correct gasoline.
Engine overloaded - Reduce the load.
Oil level low - Add engine oil.
Low engine speed - Adjust carburetor.
piston rings or cylinder bore damaged - Replace damaged parts.
Check for engine overheating from plugged cooling fins.
Checking and adjusting valve clearance.
Check for worn crankshaft or camshaft bearings.

Engine backfires

Check spark plug for fouled.
Inspect and adjust choke.
Check and adjust carburetor.
Checking and adjusting ignition coil air gap.
Inspect for sticking valves.
Check and adjust valve clearance.
Inspecting flywheel key.

Insufficient engine power

Engine temperature too high - Replace air cleaner.
Overfilling engine oil - Remove excess oil.
Defective fuel pump - Testing fuel pump output.
Governor is damage - Inspect and adjust governor.
Check and overhaul carburetor.
Test engine compression.

Excessive Fuel Consumption

Choke didn't open fully - Check throttle cable.
Incorrect carburetor adjustment - Check and adjust carburetor.

Exhaust with black smoke

Air cleaner element plugged - Clean or replace filter.
Throttle is partially engaged - Inspect and adjust choke.
Check for correct main jet for elevation.

John Deere G100 Electrical Troubleshooting

Starter does not run

Blown main fuse - Check and change.
Terminals are severely corroded and heat up - Clean connections.
Battery discharged - Charge the battery.
Ignition lock defective - Replace the lock.
Damaged starter - Install new starter.
Electrical wires are damaged - Connect wires.

Battery will not charge

Dead cell in the battery - Change the battery.
Battery cables and terminals are dirty - Check and Clean.

No Lights work

Light plug disconnected.
Replace the lamps.
Wiring short circuit.

JD G100 Mechanical Troubleshooting

Excessive tractor vibration

Implements drive belts damaged or worn - Check and change worn belt.
Worn traction drive belt - Install new belt.
Drive sheaves malfunction - Replace if necessary.
Mower blades malfunction - Replace damaged blades.

Tractor will not move with engine running

Parking brake locked - Release the park brake.
Bypass valve pulled out - Deactivate the bypass valve.
Blade becomes loose - Checking blades for loose bolts.
Incorrect blade balancing - Balance the mower blades correctly.
Lack of oil in transmission - Fill transmission with oil.

John Deere G100 Lawnmower Troubleshooting

Clogged discharge chute

Traveling too fast - Choose recommended speed.
High grass - Adjust the mower to a lower cutting height.
The grass is wet - Do not mow when grass is wet.
Engine rpm reduced - Open throttle wide.
Loss of airflow - Check engine rpm.
Cutting too low - Change cutting height.
Belt is loose - Install the belt correctly.

Streaking of uncut grass

Mower's cutting deck is clogged - Deck cleaning required.
Damaged or worn blade - Check and replace the blade.
Mower deck low - Leveling the mower deck.
Grass bag too full - Empty the grass bag.
Traveling too fast - Do not use high speed.

Belt slips

Debris in pulleys - Pulley cleaning required.
Belt is loose - Fit new belt.
Low belt tension - Adjust belt tension.

Excessive mower vibration

Debris in mower deck or in pulleys - Remove debris from deck or pulley.
Belt or pulley faulty - Change worn components.
Belt or pulleys out of alignment - Inspect and align.
The blades are unbalanced - Adjust blade balance.

Blades scalping grass

Cutting height incorrect - Raise cutting height.
Mower height wheels not adjusted - Check wheel adjustment.
Tires inflated insufficient - Inflate tires as required.
Faster mower blade speeds - Adjust the blade speed.
Bent mower blades - Install new blades.

Uneven cutting results

Deck too low - Deck leveling required.
Low tire inflation - Tire pressure required.
Wheels not positioned correctly - Adjust wheel heights correctly.
Ground speed too fast - Don't use fast speed.
Blades blunt - Sharpen the blade or install a new one.

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