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Troubleshooting


Using Troubleshooting Chart

If you are experiencing a problem that is not listed in this chart, see your John Deere dealer for service.

When you have checked all the possible causes listed and you are still experiencing the problem, see your John Deere dealer.

Engine

IF

CHECK

Engine Hard To Start or Engine Will Not Start

Fuel tank is empty.

Fuel system leaks.

Starter relay connections loose or corroded.

Low battery voltage.

Wrong engine oil.

Wrong fuel. (See “Using Proper Fuel” in “Service Miscellaneous” section).

Water, dirt, or air in fuel system:

Check fuel filter. Drain, flush, fill, bleed system.

Dirty or faulty injectors.

Fuel shut-off solenoid failure.

Operator off the seat and parking brake is not locked.

Loose or corroded electrical connections.

Forward and reverse pedal must be in the neutral position.

Mow-transport lever must be in the transport position.

Engine Runs Irregularly or Stalls

Faulty thermostat.

Replace fuel filter element.

Water, dirt, or air in fuel system.

Drain, flush, fill, bleed.

Wrong fuel. (See “Using Proper Fuel” in “Service Miscellaneous” section).

Plugged air intake screen or air cleaner.

Air restriction indicator.

Brake lock not disengaged.

Fuel pickup disconnected in fuel tank.

Engine Knocks

Engine oil low.

Faulty thermostat.

Engine overheating.

Slow idle speed too slow.

Low Oil Pressure

Oil filter plugged.

Engine oil low. Check for possible oil leaks.

Wrong engine oil.

Bad oil pump.

Faulty diode for audible alarm.

Engine Lacks Power

Reduce load or reduce speed.

Plugged air intake screen or air cleaner.

Fuel filter plugged.

Wrong fuel. (See “Using Proper Fuel” in “Service Miscellaneous” section).

Engine overheating.

Wrong engine oil.

Faulty thermostat.

Wrong valve clearance.

Dirty or faulty injectors.

Air restriction indicator.

Fuel solenoid not fully engaged.

Engine Overheats

Reduce load or speed.

Coolant low.

Faulty radiator cap or fan.

Dirty intake screen or radiator.

Cooling system needs flushing.

Faulty thermostat.

Faulty water temperature indicator or sender.

Air restriction indicator.

Engine Uses Too Much Oil

Plugged intake screen or air cleaner.

Wrong engine oil.

Oil leaks.

Plugged breather.

No O-ring on drain plug.

Excessive Vibration

Engine speed too slow.

Driveshaft worn.

Throttle linkage out of adjustment.

Will Not Move with Engine Running

Park brake locked.

Transmission oil low.

Machine Creeps with Engine Running and Travel Pedals in the Neutral Position

Linkage needs adjustment.

Park brake not locked.

Engine Stops when Forward or Reverse Travel Pedal Is Depressed

Park brake is locked. Unlock park brake by pressing down on park brake knob.


Electrical System

IF

CHECK

Battery Will Not Take A Charge

Clean or tighten connections.

Electrolyte level low.

Dead cell.

Alternator belt loose or faulty.

Faulty alternator.

Battery Indicator Stays On When Engine Is Running

Slow engine speed.

Faulty battery or alternator.

Loose alternator belt

Lights Do Not Work

Fuse blown.

Light burned out.

Starter Will Not Work

Fuse blown.

Clean or tighten connections.

Low battery output.

Neutral start switch faulty or not adjusted right.

Key switch or starter faulty.

Starter relay diode pack.

Operator not on seat.

Starter Turns Slowly

Low battery output.

Low battery power.

Wrong engine oil.

Clean or tighten connections.


Brakes And Steering

IF

CHECK

Brakes Not Working

Adjust linkage.

Steering Not Working Right

Tire inflation wrong.

Linkage needs lubrication.

Toe-in needs adjustment.


Cutting Units

IF

CHECK

Poor Cutting

Reel-to-bed knife out of adjustment.

Reel dull.

Ground speed too high. Engine speed too slow (not at rated 3000

Bed knife and/or reel grooved, ribbed, or rifled due to reel-to-bed knife adjustment too tight or running machine without grass in the reels.

Corrugated or Ribbed Appearance to Turf.

Ground speed too high or engine rpm too slow (not at rated 3000 50 rpm).

Grass Buildup on Rolls

Scraper out of adjustment.

Mowers Will Not Raise/Lower

Not enough oil in reservoir.

Double gear pump does not rotate.

No output from pump.

Broken or shorted wiring.

Defective solenoid.

Control valve spool does not move.

Reels Will Not Rotate

Reels too tight against bed knife.

Not enough oil in reservoir.

Double gear pump does not rotate.

No output from pump.

Broken or shorted wiring.

Defective solenoid.

Control valve spool does not move.

Mower Reels Squeal

Operating reel without grass (grass cuttings lubricate reel and bed knife).

Reel-to-bed knife gap is too close.

Reels Turning Backward

Reels turning at high rpm.

Backlapping knob not returned to forward position.

Oil Leaks from Cutting Unit Motor

Motor seal leaks.