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John Deere D155 Tractor Problems

John Deere D155 Engine Troubleshooting

Tractor engine not starting

Empty gas tank - Fill it up.
Wrong grade of gasoline - Use correct fuel grade.
Stale fuel - Drain gasoline and add fresh.
Water or air in fuel system - Remove air or water from system.
Spark plug wires are damaged - Inspect and change if necessary.
Faulty spark plug - Installing new spark plug.
Fuel filter is clogged - Install new filter.
Faulty safety switch - Change damaged switch.
Carburetor is not working properly - Inspect and adjust.
Inspect and adjust throttle cable. Compression problems.

Gas engine hard to start

Spark plug malfunction - Inspect the spark, replace if necessary.
Carburetor settings incorrect - Adjusting as required.
Clogged fuel pipes - Service required.
Throttle cable damaged - Change the cable.
Stale or improper gasoline - Pour quality fuel.
Electrical wires are damaged - Checking and replace wiring if necessary.
Starter is not working - Test starter and repair if necessary.

Engine runs unevenly

Cooling fins plugged - Remove dirt from cooling fins.
Electrical contacts are damaged - Check and restore defective connections.
Ignition system problems - Inspect spark plug and ignition system.
Choke cable sticks - Check and change if required.
Air filter dirty - Replace air cleaner.

Engine misses under load

Spark plug wear - Inspect spark plug wire.
Carburetor is not adjusted correctly - Adjust carburetor as required.
Ignition coil air gap incorrect - Check and adjust ignition coil air gap.

JD D155 Engine overheating

Excessive engine load - Reduce loads.
Air intake screen clogged - Clean and wash dirty components.
Too much or too little oil - Inspect oil level.
Poor quality oil - Change oil.
Inspect crankshaft to main bearing clearance.
Idle speed problems - Adjusting fast idle speed.

Engine doesn't idle speed

Spark plug not gapped correctly - Tighten the spark plug correctly.
Faulty spark plug - Test spark and change as required.

Engine knocks

Stale gasoline - Use correct fuel.
Excessive engine load - Reduce loads.
Low oil level - add oil as required.
Engine is running at low revs - Adjust carburetor as needed.
Cylinder bore and rings are wear - Replace defective components.
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.
Test carburetor, adjust if necessary.
Checking and adjusting ignition coil air gap.
Inspect inlet and outlet valves.
Inspect and set valve clearance.
Checking flywheel key.

John Deere D155 Engine loses power

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

Engine getting too much fuel

Choke is not fully open - Replace choke cable.
Carburetor is not working properly - Check carburetor float adjustment.

Black smoke is emitted during operation

Air cleaner is dirty or oiled - Clean or replace filter.
Choke partially engaged - Inspecting and adjusting throttle.
Checking and adjusting carburetor float level.

JD D155 Electrical Troubleshooting

Starter does not function

Fuse is defective - Check and change.
Battery terminals are corroded - Clean connections.
Low battery voltage - Charge the battery.
Ignition switch is damaged - Install new switch.
Damaged starter - Replace or repair.
Electrical wires are damaged - Change wiring.

Battery does not charge

One or more battery cells dead - Install new battery.
Battery cables and terminals are dirty - Check and Clean.

Lights do not work

Light plug disconnected.
Replace light bulbs.
Check wiring for short circuit.

John Deere D155 Machine Troubleshooting

Tractor vibrates excessively

Attachment driven belt worn or damaged - Belt replacement required.
Traction drive belt damage - Installing new driven belt.
Dirt on driven pulley - Change if necessary.
Blades bent or out of balance - Change defective blades.

Tractor will not move with engine running

parking brake blocks the tractor - Unlock park brake.
Bypass valve lever activated - Deactivate the bypass valve.
Blade becomes loose - Checking blades for loose bolts.
Poor balancing after sharpening - Balance the mower blades correctly.
Too little transmission oil - Fill transmission with oil.

John Deere D155 Mower Deck Problems

Clogged discharge chute

Ground speed too fast - Operate the mower at low speed.
Grass too long - Adjust cutting height.
The grass is wet - Wait until later to cut.
Engine is running at too low speed - Open choke wide.
Airflow restriction - Check engine rpm.
Mower deck set to low cutting - Choose the correct cutting height.
Belt is loose - Check belt installation.

Patches of grass uncut

Cutting deck clogging - Deck cleaning required.
Blades dull or damaged - Installing new blade.
Deck too low - Level mower deck.
Bagger too full - Clean bagger.
Speed is very high - Need to reduce speed.

Belt slips

Sheave is dirty - Check and clean.
Belt is loose - Check and change damaged belt.
Belt tension is incorrect - Correct belt tension.

The lawn mower vibrates excessively

Debris in pulleys or in mower deck - Clean sheave and deck from clogging.
Worn belt or pulley - Change worn parts.
Belt or sheaves no adjustment - Inspect and centering.
Incorrect blade balancing - Blades need balancing.

Blades scalp grass

Wrong cutting height - Check and adjust height.
Mower height wheels not adjusted - Adjust mower deck wheels.
Low tire pressure - Inflate tires as required.
Blades speed too fast - Adjust the speed of blades.
Bent mower blades - Remove bent blade and fit new one.

Uneven cutting results

Deck too low - Deck leveling required.
Tire pressure unequal - Increase tire pressure.
Incorrect rollers height - Check the rollers heights.
Traveling too fast - Don't use fast speed.
Mower blades blunt - Check and replace the 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