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John Deere 324H Troubleshooting

The John Deere 324H wheel loader is powered by John Deere PowerTech 4045D 4-cylinder liquid-cooled diesel engine with a rated power of 80 hp (59 kW) at 2400 rpm. The John Deere 324H is equipped with a two-range hydrostatic transmission, power steering system, hydraulic dual disc brakes, and 15.5x25 standard tires. The hydraulic system has a pump with fluid flow rate of 30.3 gpm (115 lpm). The hydraulic pressure is 3045 psi (210 bar). The wheel loader has a rated operating capacity of 4885 lbs (2215 kg) and tipping load of 9770 lbs (4430 kg). The maximum lift height is 131.7" (3345 mm) to hinge pin, and bucket breakout force is 16630 lbs (7545 kg).

Engine Troubleshooting

Engine starts hard or doesn't start
There is air in the fuel system - Bleed the system.
Fuel filter plugging - Filter maintenance required.
Clogged or defective injection nozzles - Replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Valve out of adjustment - Adjustment procedure required.
Fuel injection pump failure - Change or repair the pump.

Diesel starts but stalls immediately
Air filter is plugged - Clean or replace element.
Fuel filter plugging - Change filter element.
Fuel injection pump is leaking - Repair any leaks.
Defective or clogged fuel injectors - Inspect fuel injectors and change as required.
Fuel injection pump malfunction - Rebuild or change fuel pump.

Engine shuts off suddenly during operation
Low coolant temperature - Normalize the temperature by warming up the engine.
Fuel filter is plugged - Change filter element.
Air in fuel system - Bleed fuel system.
Clogged injection nozzle - Change fuel injection nozzles.
Fuel injection pump timing is wrong - Use the correct fuel injection pump timing adjustment.

Engine stalling at idle
Incorrect low idle setting - Adjust as required.
Damaged fuel injection pump - Replacement or repair required.
Fuel injector fault - Change or clean fuel injectors.
The valve clearance is incorrect - Correct valve clearance needs to be set.

Engine power is insufficient
Clogged air cleaner - Clean or replace element.
Fuel injection nozzles are faulty or clogged - Replace injection nozzles.
Fuel injection pressure is wrong - Correct the pressure settings.
The valve clearance is not adjusted - Correct valve clearance.
Incorrectly adjusted low idle speed - Adjustment required.
Dirt in the fuel hoses or lines - Service fuel hoses and lines.
Cylinder head gasket is damaged - Change cylinder head gasket.
Worn or broken piston rings - Replace the piston rings as required.

Engine overheats
Engine has a lack of coolant - Fill the cooling system and check components for leaks or other faults.
Lack of engine oil - Fill up the engine oil.
Defective radiator cap or clogged radiator core - Change cap or clean radiator.
Broken or loose fan belt - Fan belt must be replaced.
Engine overload - Load reducing required.

Oil pressure is insufficient
Lack of oil - Add oil as required.
Clogged oil filter - Replace or clean engine oil filter element.
Wrong oil viscosity - Drain crankcase and refill with correct oil.
Excessive crankshaft bearing oil clearance - Replace bearings.
Defective oil pump - Inspect and change as required.

Engine noises or knocks
Insufficient engine oil - Need to add engine oil.
Engine not warmed up - Normalize the temperature by warming up the engine.
Improper fuel injection timing - Adjust according to specifications.
Low idle speed adjustment is incorrect - Correct low idle settings.
Clogged or defective injectors - Test and replace fuel injectors if necessary.
Faulty or misaligned connecting rod - Alignment procedure or replacement is required.
Scored or worn pistons - Pistons need to be replaced.

Hydrostatic Transmission Troubleshooting

Hydrostatic transmission noises
Contaminated transmission fluid or low fluid level - Top up to proper level or change transmission fluid.
Speed control pedal linkage is bent or not adjusted - Adjust or repair linkage.
Relief valve is stuck - Replace valve as required.
Excessive loading - Reduce the load is required.
Worn or defective parts of the hydrostatic transmission - After disassembly and inspection, replace defective components.

Loss of power
Transmission fluid level is low - Need to add transmission fluid.
Relief valve is stuck - Install a new valve.
Speed control pedal linkage is bent or not adjusted - Adjust or repair linkage.

Hot transmission oil
Lack of transmission fluid - Check and refill the transmission fluid.
Transmission oil filter element clogging - Clean or change transmission oil filter.
Damaged or clogged cooling components - Check all cooling components and repair or change if required.
Transmission overload - Reduce the load is required.

Transmission oil leakage
Worn seals or gaskets - Install new components.
Transmission case internal pressure is too high - Repair or replace damaged components.
Clogged transmission fluid return pipe - Clean or change return pipe.

Hydraulics Troubleshooting

Hydraulic system overheats
Hydraulic pressure is not adjusted correctly - Adjust pressure as required.
Main relief valve is defective or unadjusted - Replace or set up the relief valve.
Hydraulic fluid contamination - The fluid must be changed.
Lack of hydraulic fluid - Add fluid to the hydraulic system.
Worn hydraulic oil pump - Repair or replace pump if necessary.

Boom can't lift or drop
Lift controls malfunction - Change or repair.
Hydraulic pump failure - Replace or repair pump if necessary.
Damaged hydraulic control valve - Install a new valve or repair it.
Hydraulic cylinder is defective - Repair or change hydraulic cylinder.
Insufficient hydraulic oil - Check and refill the hydraulic oil.

Bucket tilt does not work
Defective bucket controls - Inspect and repair if necessary.
Hydraulic pump is broken - Change or repair hydraulic pump if required.
Hydraulic control valve failure - Repair or change hydraulic valve.
Broken bucket cylinder - Repair or install a new cylinder.
Hydraulic fluid is insufficient - Checking hydraulic fluid level and add if necessary.

Boom or bucket is moving slowly
Defective hydraulic pump - Test the pump flow rate and install new pump if required.
Leaking hydraulic cylinder - Change cylinder piston seals.
Low hydraulic fluid level - Checking hydraulic fluid level and add if necessary.
Damaged or incorrect adjusted hydraulic control valve - Adjust correctly or repair.
Low hydraulic pressure - Hydraulic pressure must be set correctly.

Bucket or boom movements are jerky
There is air in the hydraulic system - Bleed hydraulic system.
Hydraulic oil filter is clogged - Clean or replace the filter.
Hydraulic oil contamination - Fill up with fresh hydraulic oil.
Cylinder rod or tube is scratched - Change damaged component.

Hydraulic pump makes excessive noise
Lack of oil or hydraulic leakage - Top up hydraulic oil or remedy leakage in system.
Dirty hydraulic filter - Service or replace hydraulic filter.
Plugged suction line - Suction line must be serviced.
Pump is sucking air - Air bleeding is required.
Damaged pump components - Rebuild or install new pump.

Electrical Troubleshooting

Battery cannot be charged
Corroded or loose cable connections - Tighten or clean connections.
Defective battery terminal connectors - Terminal connectors need to be changed.
Bad cell in battery - Battery change required.
Defective or loose belt - Belt needs to be adjusted or changed.

Starter motor turns slow
Low battery output voltage - Recharge the battery.
Battery is not holding charge - Service or change the battery.
Disconnected cables or faulty battery terminals - Check cable connections and replace or service terminals.

Starter is not cranking
Battery is discharged or worn - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery voltage is low - Battery is drained, recharge it.
Starter motor is defective - Starter needs to be replaced.