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John Deere X750 Lawn Tractor Problems
John Deere X750 Diesel Engine
Troubleshooting
Yanmar engine starting problems
Stale diesel fuel - Drain fuel and fill fresh up.
Fuel system clogged - Repair or replace.
Plugged fuel filter - Fuel filter needs to be replaced.
Faulty safety switch - Change damaged switch.
Fuel injector pump problems - Fuel pump diagnostics required.
Check starter cranking RPM. Test crankcase vacuum.
Engine starts hard
Fuel injection pump not adjusted - Adjust according to instructions.
Fuel pipes are clogged - Servicing fuel system.
Stale or incorrect fuel - Drain and add proper fuel.
Loose or corroded electrical connections - Check and replace.
Starter fault - Test starter and repair if necessary.
Rough running engine
Cooling fins blocked - Clean and wash cooling fins.
Loose electrical contacts - Check and repair damaged connections.
Dirty fuel injectors - Clean fuel injectors.
Air filter dirty - Replace air cleaner.
Yanmar diesel engine overheats
Excessive engine load - Reduce the load.
Air inlet or cooling fins blocked - Clean dirty components.
Engine oil low or too high - Checking oil level and oil pressure.
Incorrect engine oil viscosity - Change oil.
Check internal bearing clearance.
Idle speed problems - Adjust fast idle.
Engine knocks
Engine overloaded - Reduce loads.
Oil level low - Add to required level.
Low engine speed - Adjust carburetor.
Cylinder bore or piston rings are damaged - Check cylinder bore and
rings for wear.
Check for engine overheating from plugged cooling fins.
Check and adjust crankshaft end play.
Inspect for loose or wear connecting rods.
Loss of power
Engine overheats - Air cleaner element plugged.
Engine oil overfilled - Remove excess oil.
Fuel injection pump is not working properly - Test fuel pump output.
Governor is damage - Inspect and repair governor.
Test engine compression.
John Deere X750 Electrical Troubleshooting
Starter doesn't work or will not turn engine
Main fuse defective - Installing new fuse.
Battery contacts are corroded - Clean connections.
Low charging voltage - Battery charging required.
Starter is not working - Change the starter.
Wires disconnected - Reconnect wires.
Battery does not charge
One or several cells defective - Fit new battery.
No contact between cable and battery terminal - Inspect and Clean.
Lighting does not function
Light connector defective.
Check light bulbs.
Check wiring for short circuit.
John Deere X750 Machine Troubleshooting
Excessive tractor vibration
Implements drive belts damaged or worn - Inspect and change damaged
belt.
Traction drive belt worn - Installing new driven belt.
Dirt on driven pulley - Fit new pulley.
Mower blades malfunction - Balance the blades or replace.
Tractor will not move with engine running
Parking brake is applied - Unlock park brake.
Bypass valve lever in the push position - Disengage the bypass valve
lever.
Loose lawnmower blades - Tighten mower blades.
Poor balancing after sharpening - Balance the blades correctly.
Lack of oil in transmission - Add oil to the transmission.
John Deere X750 Lawn Mower Problems
Discharge Chute Clogged
Speed too high - Choose recommended speed.
Grass has grown too long - try operating a short cutting height.
Wet grass - Do not use the mower if grass is wet.
Engine runs at low revs - Increase engine speed.
Lack of air flow - Check engine speed.
Mower cuts too low - Adjust to higher cutting.
Belt installed improperly - Fit belt correctly.
Streaking of uncut grass
Cutting deck clogging - Check cutting deck and clean if necessary.
Damaged or worn blade - Check and replace the blade.
Mower deck low - Level mower deck.
Bagger too full - Empty bagger.
Speed too high - Use slower speed.
Belt slips
Dirt in the sheaves - Need to clean the pulley.
Drive belt damage - Install new belt.
No belt tension required - Check and adjusting belt tension.
Excessive mower vibration
Mower clogged or in pulleys - Clean deck and pulley from debris.
Worn belt or pulley - Change worn components.
Misaligned belt or pulley - Check and centering.
Blades out of balance - Balance the blades.
Blades scalping grass
Wrong cutting height - adjust cutting height.
Mower height wheels not adjusted - Check wheel adjustment.
Tire pressure is uneven - Inflate tires as required.
High blade speed during mowing - Blade speed required.
Bent mower blades - Replace blades.
Uneven Cut
Mower deck low - Level mower deck.
Low tire pressure - Increase tire pressure.
Wrong rollers position - Check wheel adjustment.
Gear too fast - Don't use fast speed.
Mower blades blunt - Sharpen the blade or install a new one.
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JOHN DEERE LAWN TRACTORS SPECIFICATIONS |
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ENGINES FOR JOHN DEERE LAWN TRACTORS |
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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 |
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JOHN DEERE FRONT END LOADERS |
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JD TRACTORS TROUBLESHOOTING | ||||
2640 | 3040 | 3310 | 3650 | 4100 |
5050D | 5090R | 5410 | 6105R | 7200R |
E130 | L111 | LA110 | LT155 | X300R |
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JOHN DEERE FARM TRACTORS SPECIFICATIONS |
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