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John Deere X734 Lawn Tractor Problems

John Deere X734 Engine Troubleshooting

Kawasaki engine starting problems

No fuel in fuel tank - Fill fuel up.
Improper fuel grade - Use quality fuel.
Old gasoline - Drain gasoline and change with fresh.
Fuel system clogged - Repair or replace.
Spark plug defective - Check wires connection.
Faulty spark plug - Inspect ignition spark.
Dirty fuel filter - Change fuel filter.
Brake pedal not pushed down - Push the brake pedal down.
Carburetor problems - Carburetor diagnostics required.
Inspect and adjust choke. Compression problems.

Engine long starting

Faulty spark plug - Check the spark and replace defective spark.
Carburetor not adjusted - Adjust according to instructions.
Dirt in fuel lines - Clean the system carefully.
Worn throttle cable - Replace as required.
Stale or incorrect gasoline - Drain and add quality fuel.
Electrical connections are damaged - Checking and replace wiring if necessary.
Starter problems - Check starter, repair or replace.

Rough running engine

Cooling fins blocked - Clean cooling fins.
Loose electrical contacts - Check and repair defective connections.
Ignition system problems - Check spark plug and ignition.
Throttle cable sticks - Check and repair.
Air filter dirty - Clean or replace the air filter.

Engine stops or misses

Spark plug malfunction - Test spark plug.
Carburetor problems - Test and repair.
Ignition coil not working - Replace defective component.

Kawasaki engine overheats

Excessive engine load - Reduce loads.
Air intake screen blocked - Clean and wash dirty components.
Engine oil low or too high - Inspect oil level.
Poor quality oil - Change engine oil.
Check internal bearing clearance.
Fast idle speed - Adjusting fast idle speed.

Engine does not idle

Spark plug not gapped correctly - Tighten the spark plug correctly.
Faulty spark plug - Check the spark and change defective spark.

Engine knocking

Low octane fuel - Use correct fuel.
Engine overloaded - Reduce the load.
Oil level low - Add to required level.
Engine speed too low - Adjust the speed.
Piston rings and cylinder bore worn - Inspect and replace if required.
Inspect for engine overheats from clogged cooling fins.
Check and adjust valve clearance.
Check for carbon build-up in combustion chamber.

Kawasaki engine backfires

Inspect spark plug and change if required.
Adjust or change the choke.
Test carburetor, adjust if necessary.
Check and adjust ignition coil air gap.
Check for sticking valves.
Check valve clearance, adjust if required.
Checking flywheel key.

Engine loses power

Engine overheats - Clogged air filter element.
High engine oil - Excess oil needs to be drained.
Fuel pump broken - Test fuel pump output.
Governor problems - Inspect and adjust governor.
Check and overhaul carburetor.
Checking engine compression.

Engine uses too much fuel

Throttle does not open well - Adjust throttle cable.
Carburetor problems - Check carburetor float adjustment.

Emits black smoke

Air filter is dirty or oil soaked - Clean or replace filter.
Throttle not fully engaged - Inspecting and adjusting throttle.
Checking and adjusting carburetor float level.

John Deere X734 Electrical System Troubleshooting

Starter does not run

Main fuse malfunction - Fit new fuse.
Poor terminal connection - Clean contacts.
Battery discharged - Need to charge the battery.
Ignition switch problems - Replace the lock.
Damaged starter - Replace or repair.
Wiring damage - Connect wires.

Battery doesn't charge

One or several cells defective - Fit new battery.
Bad contact between battery pole and cable - Replace or clean cable.

Lighting does not function

Headlight wire connector disconnected.
Loose or burned out bulb.
Wiring damaged - Check and replace.

John Deere X734 Machine Troubleshooting

The machine vibrates

Equipment driven belt worn out - Inspect and replace damaged belt.
Traction drive belt worn - Installing new driven belt.
Dirt on driven pulley - Replace if necessary.
Mower blades problem - Replace defective blades.

Machine does not move while engine is running

parking brake blocks the tractor - Unlock park brake.
Bypass valve lever is engaged - Disengage the bypass valve lever.
Blades loose - Tighten mower blades.
Improper blade balance - Inspect the blades and balance if necessary.
Transmission oil is low - Add transmission oil.

John Deere X734 Mower Deck Problems

Plugged discharge chute

Speed too high - Need to reduce speed.
High grass - Adjusting cutting height.
Wet grass - Wait until the grass dries.
Engine is running at too low speed - The choke is not fully opening.
Loss of airflow - Check engine speed.
Low cutting height - Adjust cutting settings.
Improper belt installation - Reinstall the belt properly.

Streaking of uncut grass

Debris in mower deck - Mower deck needs cleaning.
Defective blade - Check for blade damage and replace if necessary.
Deck level is too low - Deck leveling required.
Bagger too full - Clean grass bag.
Speed is very fast - Choose recommended speed.

Belt slips

Debris in pulleys - Recommend cleaning the sheaves.
Drive belt wear - Check and change damaged belt.
Low belt tension - Check and adjusting belt tension.

The lawn mower vibrates excessively

Debris on mower deck or in sheaves - Clean deck and pulley from debris.
Damaged mower belt or pulleys - Change worn components.
Pulleys or belt misaligned - Inspect and adjust.
Improper blade balancing - Blade balance required.

Blade strips grass

Cutting height too low - Raise cutting height.
Mower wheel height incorrect - Adjust rear or front wheel height.
Low tire pressure - Increase tire pressure.
High blade speed during mowing - Balance mower speed.
Blades are bent - Install new blades.

Uneven Cut

Deck too low - Leveling the mower deck.
Low tire inflation - Check and inflate the tires.
Wrong wheel position - Check wheel adjustment.
Traveling too fast - Operate the mower at low speed.
Blades blunt - Installing 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