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John Deere 332G Troubleshooting

The John Deere 332G skid steer loader driveline system components: a 186.3 cubic inches (3.1L) Yanmar 4TNV94FHT 4-cylinder turbocharged intercooled diesel engine with a rated power of 100 hp (74.6 kW), and 2-speed transmission. The hydraulic system has a pump with a rated capacity of 25 gpm (95 lpm). The system relief pressure is 3450 psi (238 bar). The John Deere 332G is equipped with hydraulic wet disc brakes and 14x17.5 tires. The skid steer loader has a boom lifting force of 8520 lbs (3865 kg) and bucket breakout force of 13904 lbs (6307 kg). The rated operating capacity is 3600 lbs (1633 kg), and tipping load is 7200 lbs (3272 kg).

Engine Troubleshooting

Engine hard to start or won't start
There is air in the fuel system - Bleed the system.
Fuel filter plugged - Clean the filter or install new filter element.
Burnt or clogged injection nozzle - If necessary, replace with a new nozzle.
Water in the fuel system - Change fuel and repair fuel system.
The valve clearance is incorrect - Adjust to proper valve clearance.
Fuel injection pump malfunction - Change or repair the pump.

Engine starts but stalls immediately
Plugged air filter - Install new air filter element.
Fuel filter element is clogged - Install new filter element.
Fuel injection pump is leaking - Repair any leaks.
Fuel injectors are dirty or defective - Change or clean fuel injectors.
Fuel injection pump malfunctioning - Repair or install new pump.

Engine shuts off while running
Engine not warmed up - Warm up engine as required.
Clogged fuel filter - Change filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Fuel injection nozzles are faulty or clogged - Test injection nozzles and change if necessary.
Fuel injection pump timing is wrong - Adjust fuel injection pump as required.

Engine stalls when idle
Low idle speed setting is not correct - Adjust as required.
Fuel injection pump failure - Replace or rebuild injection pump.
Fuel injector fault - Change or clean fuel injectors.
Valve out of adjustment - Adjust valve clearance according to specifications.

Engine power is too low
Air filter is dirty - Clean or change filter.
Dirty or faulty injection nozzles - Inspect nozzles and replace if necessary.
Improper fuel injection pressure - Correct the pressure settings.
The valve clearance is not adjusted - Adjust valve clearance.
Incorrectly set low idle speed - Adjust as required.
Clogged fuel lines or hoses - Service fuel lines and hoses.
Cylinder head gasket is worn - Replace cylinder head gasket.
Piston rings are leaking or defective - Piston rings replacement required.

Engine is overheated
Not enough coolant - The cooling system needs to be refilled and checked for faults.
Not enough engine oil - Fill the crankcase with engine oil.
Defective radiator cap or clogged radiator core - Clean radiator or replace cap.
Fan belt is broken or worn - Change as required.
Engine overloaded - Reduce load on the engine.

Oil pressure too low
Engine oil insufficient - Fill up the engine oil.
Dirty oil filter - Service or change engine oil filter element.
Improper type of engine oil - Fill up with the proper oil viscosity.
Incorrect oil clearance in crankshaft bearing - Replace bearings.
Oil pump is defective - Repair or change.

Engine noises or knocks
Engine oil level low - Checking oil level and add if necessary.
Coolant temperature is low - Warm up engine as required.
Fuel injection pump timing is not adjusted - Adjust according to specifications.
Low idle speed set incorrectly - Correct low idle adjustment.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Connecting rod is defective or misaligned - Align or change connecting rod.
Piston wear or scoring - Pistons replacement required.

Drive System Troubleshooting

Drive system сan't work in either direction
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Drive chain failure - Check drive chain and change defective components.
Input drive shaft failure - Change or repair.
Relief valve is damaged or worn - Repair or change.
Hydraulic filter or suction line is dirty - Service suction line or replace hydraulic filter.
Hand or foot controls failure - Change or repair.
Defective drive pump or motor - Check and repair if required.

Lack of power
Hydraulic oil filter is plugged - Replace or clean hydraulic filter.
Relief valve is open or defective - Change or close relief valve.
Faulty or worn transmission components - Check and change faulty components.
Stuck input drive shaft - Repair or install a new drive shaft.
Air trapped in hydraulic system - Bleed hydraulic system.

Overheated drive system
Low hydraulic oil level - Checking hydraulic oil level and add if necessary.
Plugged hydraulic fluid filter - Change hydraulic filter.
Relief valve is damaged or worn - Repair or change.
Hydraulic motor or drive pump is defective - Change or repair faulty component.
Hydraulic oil cooler is plugged - Cooling fins should be cleaned.
Drive system is overloaded - Reduce drive system load.

Drive system is noisy
Oil viscosity is incorrect - Use proper oil viscosity.
Hydraulic system is leaking air - Bleed air from hydraulic system.
Drive pump or hydraulic motor malfunction - Change or repair faulty component.
Mechanical components of drive system are defective or worn - Check and replace if necessary.

Hydraulics Troubleshooting

Hydraulic system overheating
Hydraulic pressure incorrectly adjusted - Set pressure correctly.
Main relief valve malfunction or improper adjustment - Adjust relief valve or change if required.
Hydraulic oil is dirty - Hydraulic oil change required.
Not enough hydraulic oil in the system - Fill the hydraulic system with oil.
Hydraulic pump is worn - Repair or change pump if required.

Boom won't lower or raise
Damaged lift controls - Check and repair as required.
Damaged hydraulic oil pump - Repair or change pump if required.
Hydraulic control valve is faulty - Install a new hydraulic valve or repair it.
Hydraulic cylinder is defective - Install a new boom cylinder or repair it.
Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.

Bucket won't move
Bucket tilt controls are damaged - Change or repair.
Hydraulic pump failure - Install new pump or repair it.
Hydraulic control valve is faulty - Install a new hydraulic valve or repair it.
Defective bucket cylinder - Replace or repair cylinder.
Low hydraulic oil level - Need to add oil.

Slow bucket or lift arm operation
Hydraulic pump is faulty - Flow-rate pump and change pump if necessary.
Hydraulic cylinder oil leakage - Change cylinder piston seals.
Low hydraulic oil level - Need to add oil.
Worn or unadjusted hydraulic control valve - Adjust properly or repair.
Hydraulic pressure has dropped - Adjust pressure as required.

Lift arm or bucket jerks when working
Air leaks in hydraulic system - Bleed air from hydraulic system.
Plugged hydraulic oil filter - Service or change the hydraulic filter.
Contaminated hydraulic oil - The oil must be changed.
Scored cylinder tube or rod - Change defective component.

Hydraulic pump is noisy
Not enough oil or hydraulic system leaking - Refill hydraulic oil or repair leaks in system.
Plugged hydraulic filter - Clean or replace the filter.
Suction line is dirty - Suction line must be serviced.
Air in hydraulic pump - Bleed air.
Pump parts are damaged - Change or rebuild pump.

Electrical Troubleshooting

Battery does not charge
Wiring connections are corroded or loose - Tighten or clean connections.
Electrical terminal connectors are defective - Change terminal connectors.
Battery is defective - Replace the battery.
Loose or worn belt - Install a new belt or adjust belt tension.

Starter turns slowly
Low battery power - Battery is drained, recharge it.
Battery runs out quickly - Service battery or replace it.
Bad terminals or disconnected battery cables - Check cable connections and change or clean terminals.

Starter doesn't crank
Battery is discharged or defective - Charge or change the battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery power is low - Battery is drained, charge it.
Starter motor is defective - Replace or repair starter.