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John Deere LT133 Troubleshooting

John Deere LT133 Engine Problems

Engine doesn't start

Fuel tank is empty - Add gasoline.
Incorrect fuel grade - Use quality fuel.
Stale gas - Drain gasoline and change with fresh.
Clogged fuel system - Remove clogging.
Plug connection defective - Replace if necessary.
Spark plug not working - Inspect ignition spark.
Fuel filter is dirty - Change fuel filter.
Faulty safety switch - Change damaged switch.
Carburetor malfunction - Check and repair as required.
Inspect starter cranking speed RPM. Test compression.

Gas engine is difficult to start

Spark plug failed - Check the spark and change defective spark.
Problems with carburetor adjustment - Adjust as required.
Clogged fuel pipes - Service required.
Worn throttle cable - Replace as required.
Stale or improper fuel - Fill in correct fuel.
Electrical connection problems - Checking and replace wiring if necessary.
Starter fault - Check starter, repair or replace.

Engine stalling, surging or running rough

Cooling fins plugged - Remove dirt from cooling fins.
Loose electrical contacts - Check and replace damaged connections.
Ignition adjust incorrect - Check spark plug and ignition.
Choke cable sticking - Check and change if required.
Air filter dirty - Change air cleaner.

Engine misses under load

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

Engine overheats

Engine overloaded - Reduce loads.
Air intake screen clogged - Clean clogged components.
Too much or too little oil - Inspect oil level.
Low quality engine oil - Change oil.
Check internal bearing clearance.
Idle speed problems - Adjusting fast idle speed.

Engine will not idle

Spark plug not gapped correctly - Tighten the spark plug correctly.
Spark plug failed - Inspect the spark, change if necessary.

JD LT133 Engine knocking

Low octane fuel - Use correct gasoline.
Excessive engine load - Reduce the load.
Low oil level - Add to required level.
Engine runs at low revs - Adjust the required speed.
Piston rings and cylinder bore are wear - Replace damaged parts.
Inspect for engine overheats from clogged cooling fins.
Checking and adjusting valve clearance.
Inspect for loose or wear connecting rods.

Engine back-fire

Check spark plug and replace if necessary.
Adjust or change the choke.
Check and adjust carburetor.
Inspect and adjust ignition coil air gap.
Check inlet and outlet valves.
Test valve clearance, adjusting if necessary.
Inspect flywheel key.

Engine does not develop full power

Engine overheats - Check air cleaner for plugged condition.
Engine oil overfilled - Drain excess oil.
Defective fuel pump - Test fuel pump output.
Governor not work - Inspect and repair governor.
Check carburetor float adjustment.
Check engine compression.

Excessive fuel consumption

Throttle does not open well - Inspect choke cable.
Incorrect carburetor adjustment - Check and adjust carburetor.

Black smoke is emitted during operation

Air cleaner element clogged - Inspect and clean.
Choke partially engaged - Inspect and adjust throttle.
Check oil fill dipstick O-ring seal or cracked cap.

John Deere LT133 Electrical Troubleshooting

Starter doesn't work or will not turn engine

Main fuse defective - Check and change.
Battery contacts are corroded - Inspect and clean contacts.
Battery is discharged - Need to charge the battery.
Ignition switch is damaged - Replace the lock.
Damaged starter - Change the starter.
Wiring disconnected - Replace wiring.

Battery does not charge

Battery cells defective - Install new battery.
No contact between cable and battery terminal - Clean or replace cable.

No Lights work

Light plug not connected.
lamp does not work.
Wiring damaged.

JD LT133 Machine Troubleshooting

Excessive tractor vibration

Attachment drive belts worn or damaged - Inspect and replace damaged belt.
Traction drive belt worn - Fit new belt.
Drive pulley is dirty - Installing a new pulley.
The mower deck blades are bent or unbalanced - Change as needed.

Tractor doesn't move when engine runs

Parking brake is applied - Unlock park brake.
Bypass valve lever is engaged - Deactivate the bypass valve.
Blades loose - Fasten the blades securely.
Incorrect blade balancing - Inspect the blades and balance if necessary.
Transmission oil too low - Add transmission oil.

John Deere LT133 Mower Deck Problems

Clogged discharge chute

Travel speed too fast - Operate the mower at low speed.
High grass - Adjust the mower to a lower cutting height.
The grass is wet - Don't mow while wet grass.
Engine rpm reduced - Engine speed must be increased.
Restricted air flow - Adjust to high revs.
Lack of cutting height - Use higher cutting.
Incorrect belt installation - Reinstall the belt properly.

Lawn mower leaving uncut grass

Mower deck clogged - Check cutting deck and clean if necessary.
Blade wornout - Sharpen the blade or install a new one.
Mower deck is low from ground - Leveling the mower deck.
Grass bag too full - Clean grass bag.
Traveling too fast - Use slower speed.

Belt slips

Debris in pulleys - Need to clean the pulley.
Belt is damaged - Check and replace belt.
Belt tension improper - Check and adjusting belt tension.

Too much mower vibration

Mower deck clogged or in sheaves - Remove debris from deck or pulley.
Damaged pulleys or belt - Change worn components.
Belt or pulleys out of centering - Inspect and centering.
Blades are not balanced correctly - Balance blades correctly.

Blades scalping grass

Cutting too low - adjust cutting height.
Mower wheels not adjusted correctly - Check wheel adjustment.
Low tire inflation - Tire pressure required.
Faster mower blade speeds - Correct blades speed.
Bent blades during operation - Remove bent blade and install new one.

Uneven Cut

Mower deck not leveled properly - Level mower deck.
Tires inflated insufficient - Increase tire pressure.
Rollers not positioned properly - Adjust front or back wheel height.
Travel speed too high - Operate the mower at low speed.
Blades dull - 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