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John Deere D100 - Problem Solving

John Deere D100 Engine Troubleshooting

Tractor engine doesn't start

No fuel in fuel tank - Add gasoline.
Low-quality gasoline - Use correct gasoline grade.
Stale gasoline - Drain gasoline and fill fresh up.
Clogged fuel system - Remove clogging.
Faulty spark plug wire - Replace if necessary.
Spark plug not working - Check ignition spark.
Plugged fuel filter - Install new filter.
Faulty safety switch - Change damaged switch.
Carburetor is clogged - Clean the carburetor.
Inspect and adjust choke. Check the Valves and Compression System.

Engine hard to start

Spark plug malfunction - Test spark and change as required.
Carburetor components worn out - Repair or replace parts.
Fuel pipes are clogged - Clean fuel system components.
Choke cable damaged - Replacement required.
Stale or improper gasoline - Drain and add proper gasoline.
Electrical wiring worn out - Inspect and replace.
Starter fault - Inspect the starter and change defective parts.

Engine runs roughly

Cooling fins are clogged - Clean cooling fins.
Electrical connections damaged - Check and replace defective connections.
Ignition setting defective - Test ignition and spark plug.
Choke cable sticks - Repair or replace.
Air cleaner element plugged - Clean or change air filter.

Engine misses under load

Spark plug worn out - Test spark plug.
Carburetor malfunction - Inspect and overhaul.
Ignition coil air gap incorrect - Check and adjust ignition coil air gap.

JD D100 Engine overheating

Engine overloaded - Reduce loads.
Air inlet or cooling fins blocked - Clean and wash dirty components.
Too much or too little oil - Inspect oil pump for damage or worn.
Improper engine oil viscosity - Change oil.
Check internal bearing clearance.
Too Fast idle - Adjust fast idle.

Engine doesn't idle speed

Spark plug is loose - Check tightness of spark plug.
Spark plug fail - Inspect the spark, replace if necessary.

Engine knocking

Low octane gasoline - Use correct gasoline.
Excessive engine load - Reduce loads.
Oil level low - Add engine oil.
Engine speed too low - Adjust the speed.
Cylinder bore and rings worn out - Inspect cylinder bore or rings for worn.
Check for engine overheating from plugged cooling fins.
Check and adjust valve clearance.
Check for worn crankshaft or camshaft bearings.

Engine backfires

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

Loss of power

Engine temperature too high - Air cleaner element plugged.
Too much oil in engine - Drain excess oil.
Fuel pump broken - Repair or replace fuel pump.
Defective governor - Repair or replace governor.
Check and overhaul carburetor.
Test engine compression.

Engine getting too much fuel

Throttle does not open well - Replace throttle cable.
Carburetor is not working properly - Checking and adjusting carburetor.

Black smoke is emitted during operation

Air cleaner element clogged - Clean or replace filter.
Throttle not fully engaged - Inspect and adjust choke.
Checking and adjusting carburetor float level.

John Deere D100 Electrical System Troubleshooting

Starter doesn't work or will not turn engine

Blown fuse - Check and replace.
Battery contacts are corroded - Clean connections.
Battery discharged - Battery charging required.
Ignition switch problems - Install new switch.
Starter is not working - Repair or replace.
Wiring disconnected - Replace wiring.

Battery does not charge

Dead cell in the battery - Change the battery.
Battery cables and terminals are dirty - Clean or change cable.

Lighting does not function

Light plug not connected.
Check lamps.
Wiring short circuit.

JD D100 Machine Problems

Tractor vibrates too much or rattles excessively

Implements drive belts damaged or worn - Belt replacement required.
Traction drive belt damage - Check and replace belt.
Drive sheaves are dirty - Replace if necessary.
Mower blades problem - Change as needed.

Machine does not move while engine is running

Parking brake locked - Release the park brake.
Bypass valve lever activated - Disengage the bypass valve lever.
Blade becomes loose - Checking blades for loose bolts.
Incorrect blade balancing - Check mower blade balancing.
Lack of oil in transmission - Fill transmission with oil.

John Deere D100 Lawn Mower Troubleshooting

Clogged discharge chute

Traveling too fast - Need to reduce speed.
High grass - Adjusting cutting height.
Grass too wet - Wait until later to cut.
Engine rpm too low - Adjusting carburetor for higher rpm.
Lack of air flow - Adjust to high revs.
Low cutting height - Adjust to higher cutting.
Belt is loose - Fit belt correctly.

Patches of grass uncut

Cutting deck clogging - Mower deck needs cleaning.
Defective blade - Install new blade.
Deck level is too low - Adjust and level the deck height.
Bagger too full - Empty the grass bag.
Ground speed too fast - Need to reduce speed.

Belt Slipping

Debris in sheaves - Pulley cleaning required.
Belt is worn out - Fit new belt.
Belt tension improper - Correct belt tension.

The lawn mower vibrates excessively

Debris in sheaves or on mower deck - Remove debris from the pulley or deck.
Damaged sheaves or belt - Change defective parts.
Belt or pulleys no adjustment - Check and align.
Blades out of balance - Balance blades properly.

Blade strips grass

Cutting height improper - Set the proper cutting height.
Mower wheels not adjusted correctly - Adjust wheel heights correctly.
Tires inflated insufficient - Increase tire pressure.
Blades speed too fast - Adjust the speed of blades.
Bent blades during operation - Replace blades.

Uneven cutting results

Deck too low - Deck leveling required.
Tire pressure unequal - Tire pressure required.
Wrong wheel position - Check the wheel heights.
Operating at a faster ground speed - Use slower speed.
Blades worn - 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