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New Holland L221 Troubleshooting

The New Holland L221 skid steer loader is powered by 207 cu.in (3.4L) FPT F5H FL463 4-cylinder turbocharged diesel engine with a rated power of 68 hp (51 kW) at 2500 rpm. The New Holland L221 is equipped with a radial-lift boom, 1-speed or 2-speed hydrostatic transmission, ASA 100 drive chains, and 12x16.5 standard tires. The hydraulic system has a pump with fluid flow rate of 24.2 gpm (91.5 lpm) or 33.2 gpm (125.7 lpm). The hydraulic pressure is 3045 psi (210 bar). The skid steer loader has a rated operating capacity of 2100 lbs (953 kg) and tipping load of 4200 lbs (1905 kg). The lift height is 123" (3125 mm) to hinge pin, and dump height is 98.2" (2495 mm).

Engine Troubleshooting

Engine starts up hard or doesn't start
Air in the fuel system - Air bleeding.
Fuel filter element is clogged - Clean the filter or install new filter element.
Fuel injection nozzles are clogged or faulty - Replace injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump malfunction - Replace injection pump or repair it.

Engine starts but then stops
Air cleaner is dirty - Clean or change cleaner.
Fuel filter plugging - Change or clean the filter element.
Fuel injection pump has loose connections - Tighten the connections.
Clogged or defective injectors - Change or clean fuel injectors.
Defective fuel injection pump - Replace or rebuild injection pump.

Engine shuts off while running
Low coolant temperature - Warm up the engine.
Fuel filter is plugged - Install new filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Dirty or damaged injection nozzles - Replace injection nozzles.
Fuel injection pump timing is wrong - Set it up as required.

Engine stalling at idle
Low idle speed setting is not correct - Correct low idle adjustment.
Fuel injection pump damage - Change pump or rebuild it.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Incorrect valve clearance - Have it adjusted.

Engine power is insufficient
Dirty air cleaner - Install new air cleaner element.
Clogged or burnt injection nozzle - Install a new kit of correctly balanced nozzles.
Incorrect fuel injection pressure - Correct the pressure settings.
The valve clearance is incorrect - Need to adjust valve clearance.
Incorrect low idle speed adjustment - Correct low idle settings.
Restricted fuel lines or hoses - Clean fuel hoses and lines.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Piston rings are worn or damaged - Replace piston rings.

Engine overheated
Not enough coolant - The cooling system needs to be refilled and checked for faults.
Low engine oil level - Add oil to the engine crankcase.
Clogged radiator fins or leaking radiator cap - Replace cap or clean radiator.
Fan belt is loose or defective - Fan belt must be replaced.
Engine is overloaded - Load reducing required.

Insufficient oil pressure
Not enough oil in the engine - Add oil to the engine crankcase.
Clogged oil filter - Clean or change engine oil filter.
Oil grade or viscosity is incorrect - Use oil of proper viscosity.
Excessive crankshaft bearing oil clearance - Bearing replacement required.
Oil pump is worn or damaged - Inspect and change as required.

Engine knocking sound or abnormal noise
Insufficient engine oil - Add oil to the engine crankcase.
Coolant temperature is low - Warm up the engine.
Fuel injection pump timing is wrong - Adjust as recommended.
Incorrect low idle setting - Adjust low idling as recommended.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Connecting rod is worn or not aligned - Need to replace or align the connecting rod.
Piston wear or scoring - Have pistons replaced.

Drive System Troubleshooting

Machine will not move in either direction or one direction
Insufficient hydraulic oil - Fill the system to proper hydraulic oil level.
Damaged drive chain - Check drive chain and change faulty parts.
Faulty relief valve - Repair or replace relief valve.
Dirty hydraulic filter or suction line - Change hydraulic filter or service suction line.
Worn or damaged foot or hand controls - Repair or change.
Drive pump or motor malfunction - Replace or repair faulty component.

Low power
Hydraulic oil filter is dirty - Replace or service hydraulic filter.
Relief valve is defective or open - Change or close relief valve.
Transmission components are faulty or damaged - Check and replace faulty components.
Stuck input drive shaft - Rebuild or change the shaft.
Air leaks in hydraulic system - Need to bleed air.

Drive system overheating
Hydraulic fluid level low - Add fluid as required.
Plugged hydraulic fluid filter - Replace or service hydraulic filter.
Relief valver is broken - Repair or change.
Hydraulic motor or drive pump is worn - Repair or change faulty component.
Dirty oil cooler - Clean cooling fins as required.
Transmission overloading - Reduce loading.

Drive system is excessively noisy
Incorrect oil viscosity - Use correct oil viscosity.
Air in the hydraulic system - Air bleeding is required.
Hydraulic motor or drive pump is defective - Inspect and change as required.
Mechanical components of drive system are defective or worn - Inspect the components for defect or damage and repair as needed.

Hydraulics Troubleshooting

Hydraulic system has overheating
Hydraulic pressure incorrectly adjusted - Correct adjustment is required.
Main relief valve improper adjustment or failure - Replace or set up the relief valve.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Lack of hydraulic fluid - Need to add fluid.
Faulty hydraulic oil pump - Repair or install new hydraulic pump.

Boom fails to lift or drop
Lift controls malfunction - Replace or repair.
Defective hydraulic pump - Replace or repair pump if necessary.
Hydraulic control valve is defective - Repair or change the valve.
Faulty hydraulic cylinder - Change or repair lift cylinder.
Hydraulic fluid level low - Add fluid as required.

Bucket fails to tilt
Bucket tilt controls are defective - Repair or change.
Hydraulic pump not working - Change or repair hydraulic pump if required.
Hydraulic control valve malfunction - Install a new valve or repair it.
Bucket cylinder is faulty - Replace or repair cylinder.
Hydraulic oil level low - Checking hydraulic oil level and add if necessary.

Slow boom or bucket action
Faulty hydraulic oil pump - Test the pump performance and change pump if required.
Hydraulic cylinder leaking - Change cylinder piston seals.
Hydraulic oil is insufficient - Fill the system to proper hydraulic oil level.
Defective or not adjusted hydraulic control valve - Repair or set properly.
Hydraulic system loosing pressure - Adjust pressure correctly.

Bucket or boom movements are jerky
Hydraulic system is leaking air - Bleed air from system.
Hydraulic oil filter is dirty - Replace or clean the filter.
Dirty hydraulic fluid - Hydraulic fluid change required.
Scored cylinder tube or rod - Replace worn component.

Excessive hydraulic pump noise
Leaking hydraulic system or insufficient oil level - Top up hydraulic oil or remedy leakage in system.
Hydraulic filter clogging - Change or clean oil filter.
Plugged suction line - Clean suction line as required.
Air in hydraulic pump - Need to bleed air.
Pump parts are worn out - Install new hydraulic pump or rebuild it.

Electrical Troubleshooting

Battery won’t charge
Corroded or loose wire connections - Service or tighten cable connections.
Defective electrical terminal connectors - Replace terminal connectors.
Defective battery - Install a new battery.
Loose or worn belt - Replace belt or adjust belt tension.

Starter motor cranks slow
Low battery voltage - Charge the battery.
Battery is draining quickly - Service charging system or replace battery.
Battery terminals are corroded or wires are disconnected - Check battery wires and service or replace terminals.

Starter is not cranking
Battery is drained or defective - Charge or replace the battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Battery capacity is low - Charge the battery.
Starter motor failing - Starter should be replaced.