All Manuals Close Window

Troubleshooting


Using Troubleshooting Chart

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

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

Engine

IF

CHECK

Engine Will Not Crank

Travel pedals not in neutral.

Mow-transport lever not in transport position.

Park brake not locked.

Backlapping valve on.

Loose or corroded battery connections.

Low battery output.

Sulfated or worn-out battery.

Faulty starter.

Open fuse.

Open fusible link.

Open circuit in wiring.

Engine Hard to Start

Engine is cold.

Plugged fuel filter.

Engine oil viscosity too heavy.

Cold start system not being used, or malfunctioning.

Dirty or faulty fuel injectors.

Air in fuel system.

Loose or corroded electrical connections.

Stale or improper fuel.

Open fuse.

Engine Misses Under Load

Stale or dirty fuel.

Plugged fuel filter.

Engine Runs Rough When Hot

Fuel tank vent plugged.

Dirt in fuel filter.

Engine Runs Unevenly

Loose electrical connections.

Improper fuel.

Stale or dirty fuel.

Fuel line or fuel filter plugged.

Air in fuel system.

Dirty or faulty fuel injectors.

Plugged air intake system.

Governor failed. (See Technical Manual or your John Deere Distributor.)

Engine overheated - clean radiator and screens.

Engine Will Not Start

Fuel level too low.

Fuel shut-off valve closed.

Plugged fuel filter.

Wrong, dirty or stale fuel.

Air in fuel system.

Dirty or faulty injectors. (See Technical Manual or your John Deere Distributor.)

Engine Misses Under Load

Air in fuel system.

Fuel is stale or dirty.

Air filter is dirty.

Fuel filter plugged or dirty.

Engine Hard to Start

Dirty or faulty injectors. (See Technical Manual or your John Deere Distributor.)

Fuel is dirty.

Electrical connections dirty.

Air lock in fuel line. Disconnect fuel line from filter. Fuel should flow.

Engine Will Not Slow Idle

Fuel and/or fuel filter is dirty.

Plugged fuel line.

Valves not seating correctly - adjust valves. (See Technical Manual or your John Deere Distributor.)

Engine Overheats

Air filter is dirty or plugged.

Coolant level low.

Radiator screen/cooling fins plugged or dirty.

Loose or defective fan/alternator belt.

Engine oil is low.

Engine speed - operate at MAXIMUM speed not SLOW idle.

Engine Backfires

Valves not seating correctly - adjust valves. (See Technical Manual or your John Deere Distributor.)

Engine Loses Power

Engine overheating.

Fuel and/or fuel filter is dirty.

Air filter is dirty or plugged.

Too much engine oil - drain oil to correct level.

Engine overheated - clean radiator and screens.

Engine overload - reduce load.

High altitude operation.

Engine Knocks

Stale fuel.

Engine overload - reduce load.

Loose connecting rod. (See Technical Manual or your John Deere Distributor.)

Carbon in combustion chamber. (See Technical Manual or your John Deere Distributor.)

Low engine speed - raise engine rpm.

Low engine oil level.

Engine overheated - clean radiator and screens.

Engine Emits Black Smoke

Excessive fuel.

Dirty air cleaner.

Engine overloaded.

Diesel Model: Dirty or faulty fuel injectors.

Engine Emits White Smoke

Diesel Model: Low cetane fuel.

Low engine temperature.

Head gasket leakage.


Electrical

IF

CHECK

Battery will not take a charge

Dead cell in battery.

Loose or corroded connections.

Battery worn out.

Battery electrolyte level.

Starter does not work

Loose or corroded connections.

Battery worn out, output is low.

Faulty starter.

Starter cranks slowly

Battery worn out, output is low.

Engine oil is too heavy.

Loose or corroded connections.

Electrical system does not work

Blown fuse.

Loose or corroded connections.

Battery worn out, output is low.

Battery light comes on when engine is running

Low engine speed.

Faulty voltage regulator/alternator.

Faulty battery.

Grounded wire in circuit.

Indicator light(s) does not come on in START position

Faulty indicator bulb.

Faulty wiring.

Faulty switch or sensor.

Battery will not take a charge

Dead cell in battery.

Loose or corroded connections.

Sulfated or worn out battery.

Electrolyte level low.

Low engine speed or excessive idling.

Faulty charging system.


Hydraulic Drive System

IF

CHECK

Hydraulic system fails to function

Oil level low.

Faulty relief valve.

Faulty pump or motor.

Clogged suction line.

Noisy pump

Low oil level/wrong oil.

Air leaks.

Foaming oil

Low oil level.

Wrong oil.

Air leaks. Tighten fittings - check O-rings.

Slow reel speed

Oil level low.

Oil overheated.

Wrong oil.

Worn pump or motor.

Worn or stuck relief valve.

Dirty relief valve.

Reels too tight against bed knife.

Oil overheats

Low oil level.

High-pressure internal leak.

Dirty oil/ Wrong oil.

Weight transfer valve closed carrying too much weight.

Oil cooler plugged.

High ambient temperatures working under heavy loads. Need oil cooler.


Hydrostatic Drive

IF

CHECK

Machine will not move forward or backward

Low oil level/wrong oil.

Park brake locked.

Control linkage out of adjustment.

Low charge pressure.

Internal pump damage.

Noisy system

Low oil level.

Air in system.

Oil filter plugged.

Internal pump or motor damage.

Park brake locked.

Accelerates slowly

Low oil level.

Air in system.

Control linkage loose or out of adjustment.

Low charge pressure.

Park brake locked.

Machine moves with engine running and travel pedal in neutral

Linkage out of adjustment.

Pedals do not return to neutral

Spring out of adjustment.


Cutting Units

IF

CHECK

Poor cutting

Reel-to-bed knife out of adjustment.

Reel dull.

Ground speed too high. Engine speed too slow.

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.

Grass buildup on rollers

Scraper out of adjustment.

Mowers will not raise/lower

Not enough oil in reservoir.

Transaxle pump does not rotate.

No output from pump.

Control valve spool does not move.

Mower reels squeal

Operating reel without grass (juice lubricates reel and bed knife).

Reel-to-bed knife clearance is inadequate.

Reels will not rotate

Reels too tight against bed knife.

Not enough oil in reservoir.

Hydraulic pump does not rotate.

No output from pump.

Broken or shorted wiring.

Defective solenoid.

Control valve spool does not move.


Steering

IF

CHECK

Steering is difficult

Improper tire inflation.

Hydraulic oil level low.

Steering cylinder lubrication.