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John Deere D105 Problems

John Deere D105 Engine Troubleshooting

Tractor engine does not start

Empty gas tank - Add gasoline.
Wrong fuel grade - Use quality gasoline.
Stale fuel - Drain fuel and add fresh.
Dirt and debris in fuel system - Remove debris and dirt.
Spark plug wire is loose or disconnected - Inspect and change if necessary.
Spark plug damaged - Installing new spark plug.
Fuel filter is dirty - Fuel filter needs to be replaced.
Faulty safety switch - Change damaged switch.
Carburetor malfunction - Check and repair as required.
Inspect and adjust choke. Test compression.

Engine hard to start

Spark plug wear - Inspect the spark, change if necessary.
Carburetor settings incorrect - Adjusting as required.
Clogged fuel lines - Remove clogging from fuel pipes.
Throttle cable worn - Install new throttle cable.
Stale or improper gasoline - Fill in proper gasoline.
Loose or corroded electrical connections - Inspect and replace wiring as needed.
Starter fault - Inspect the starter and change defective parts.

Engine runs unevenly

Cooling fins blocked - Clean and wash cooling fins.
Electrical connections damaged - Check and repair damaged connections.
Ignition adjust incorrect - Check ignition system and adjust as required.
Choke cable sticks - Check and replace.
Air cleaner blocked - Clean air filter.

Engine runs but misses

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

Engine overheating

Engine overloaded - Reduce the load.
Air intake screen blocked - Clean and wash dirty components.
Too little or too much oil - Add or drain oil.
Improper engine oil viscosity - Change engine oil.
Check internal bearing clearance.
Fast idle speed - Adjust carburetor for slower idle speed.

Engine will not idle

Poor spark plug contact - Check spark plug gap.
Faulty spark plug - Check the spark and change defective spark.

JD D105 Engine knocks

Stale or low octane fuel - Change fuel.
Engine overloaded - Reduce the load.
Lack of engine oil - Add engine oil.
Engine is running at low revs - Adjust carburetor.
Piston rings and cylinder bore worn - Check cylinder bore and rings for wear.
Check for engine overheating from plugged cooling fins.
Check and adjust valve clearance.
Checking for wear crankshaft or camshaft bearings.

Engine backfires

Checking spark plug.
Adjust or replace choke.
Check and adjust carburetor.
Checking and adjusting ignition coil air gap.
Check inlet and outlet valves.
Check and adjust valve clearance.
Inspecting flywheel key.

Engine does not develop full power

Engine overheating - Clean or replace air filter.
Excess engine oil - Remove excess oil.
Fuel pump is not working properly - Testing fuel pump output.
Governor is damage - Repair or replace governor.
Check carburetor float adjustment.
Checking engine compression.

Engine gets too much gas

Choke didn't open fully - Replace choke cable.
Carburetor is not adjusted - Adjust carburetor.

Emits black smoke

Air filter is dirty or oil soaked - Clean or replace filter.
Choke partially engaged - Inspecting and adjusting choke.
Inspect carburetor needle valve and seat for wear or damage.

John Deere D105 Electrical System Troubleshooting

Starter doesn't work or will not turn engine

Blown fuse - Install new fuse.
Poor terminal connection - Clean contacts.
Battery not charged - Need to charge the battery.
Ignition switch defective - Replace switch.
Starter fault - Change the starter.
Wires disconnected - Replace wiring.

Battery doesn't charge

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

Lighting does not function

Light connector defective.
lamp defective.
Wiring damaged.

JD D105 Machine Problems

Tractor vibrates excessively

Implements driven belt damaged or worn - Belt replacement required.
Traction drive belt worn - Install new belt.
Drive sheaves malfunction - if required.
Blades bent or out of balance - Change defective blades.

Engine runs but tractor won't move

The parking brake is locked - Unlock park brake.
Bypass valve lever activated - Deactivate the bypass valve.
Mower blades are loose - Check mower blades and fasten as required.
Poor blade balancing - Check blades for damage and balance as required.
Transmission oil is low - Topping up oil.

John Deere D105 Mower Deck Troubleshooting

Plugged discharge chute

Travel speed too fast - Choose recommended speed.
High grass - try operating a short cutting height.
Grass too wet - Wait until the grass dries.
Engine speed reduced - Engine speed must be increased.
Restricted air flow - Check engine speed.
Mower deck set to low cutting - Adjust to higher cutting.
Belt installed incorrectly - Check belt installation.

Patches of grass uncut

Debris in mower deck - Check cutting deck and clean if necessary.
Damaged blade - Inspect and fit new blade if required.
Mower deck low - Deck leveling required.
Grass bag overfilled - Empty the grass bag.
Speed is very fast - Use slower speed.

Belt Slipping

Sheave is dirty - Recommend cleaning the sheaves.
Belt is loose - Fit new belt.
Belt tension is incorrect - Belt tension needs to be adjusted.

The lawn mower vibrates excessively

Debris in sheaves or on mower deck - Clean deck and pulley from debris.
Worn belt or pulley - Change worn parts.
Belt or pulleys out of alignment - Inspect and align.
Improper blade balancing - Adjust blade balance.

Blades scalp grass

Wrong cutting height - Set the correct cutting height.
Mower rollers height wrong - Adjust wheel heights correctly.
Low tire inflation - Inflate tires as required.
Higher blade speed - Adjust the blade speed.
Bent blades during operation - Replace blades.

Uneven cutting results

Mower deck low - Level mower deck.
Tires inflated insufficient - Check and inflate the tires.
Wrong rollers position - Adjust mower deck wheels.
Gear too high - Operate the mower at low speed.
Blades worn - Install new blade.

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