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New Holland LX485 Troubleshooting

The New Holland LX485 skid steer loader driveline system components: Shibaura N843H vertical 3-cylinder liquid-cooled diesel engine with a rated power of 36 hp (26.5 kW), and one-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 11.7 gal/min (44.3 l/min). The system relief pressure is 2600 psi (176 bar). The New Holland LX485 is equipped with a radial-lift boom, ASA 80 drive chains, and 10.00x16.5 or 27x8.50x15 tires. The skid steer loader has a max lift height of 111" (2825 mm) to hinge pin and dump height of 87.9" (2230 mm). The rated operating capacity is 1350 lbs (612 kg), and tipping load is 2700 lbs (1225 kg).

Engine Troubleshooting

Engine difficult to start or won't start
There is air in the fuel system - Bleed the system.
Fuel filter plugging - Replace filter element.
Faulty or dirty injection nozzles - Clean or replace injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve clearance is wrong - Adjust valve clearance.
Fuel injection pump damage - Replace injection pump or repair it.

Diesel starts and stops
Clogged air cleaner - Clean or replace air cleaner element.
Fuel filter element is dirty - Service or replace the filter.
Fuel injection pump is leaking - Repair any leaks.
Damaged or clogged injectors - Clean fuel injectors or change it.
Fuel injection pump is not working correctly - Change pump or rebuild it.

Engine stops unexpectedly during operation
Engine is cold - Warm up engine as required.
Fuel filter plugging - Change filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles fault - Replace injection nozzles.
Improper setting of fuel injection pump timing - Adjust according to specifications.

Engine stalls while idle
Wrong adjustment of low idle speed - Correct low idle settings.
Fuel injection pump malfunctioning - Install a new pump or rebuild.
Fuel injectors are dirty or defective - Change or clean fuel injectors.
Valve clearance is out of adjustment - Check and adjust.

Diesel engine loses power
Dirty air cleaner - Clean or replace air cleaner element.
Faulty or dirty injection nozzles - Install a new kit of correctly balanced nozzles.
Uneven fuel injection pressure - Correct the pressure settings.
Valve out of adjustment - Correct valve clearance needs to be set.
Incorrectly set low idle speed - Adjust as required.
Dirty fuel hoses or lines - Fuel hoses and lines must be clean.
Worn cylinder head gasket - Install a new gasket.
Worn or damaged piston rings - Piston rings need to be replaced.

Engine overheated
Coolant level is low - Refill to the correct level and inspect system for leaks.
Not enough engine oil - Add oil to the engine crankcase.
Defective radiator cap or clogged radiator fins - Clean radiator or install new cap.
Excessive wear of the fan belt - Replace the fan belt.
Engine is overloaded - Load reducing required.

Oil pressure too low
Low oil level - Add oil to the engine crankcase.
Engine oil filter is plugged - Change or service engine oil filter.
Incorrect oil viscosity - Use the specified type of engine oil.
Crankshaft bearing oil clearance is incorrect - Bearings need to be reinstalled.
Oil pump is damaged - Check and replace if necessary.

Engine knocking or noise
Insufficient engine oil - Fill up the oil to required level.
Engine is not preheated - Warm up the engine.
Improper setting of fuel injection pump timing - Set it up as required.
Incorrectly set low idle speed - Adjust low idling as recommended.
Dirty or defective injectors - Replace fuel injectors.
Connecting rod is worn or misaligned - Connecting rod needs to be replaced or aligned.
Pistons are worn or scored - Replace the pistons as required.

Drive System Troubleshooting

Machine will not move forward or backward
Insufficient hydraulic fluid - Check and refill the hydraulic fluid.
Drive chain failure - Check drive chain and change faulty components.
Relief valver is broken - Change or repair relief valve.
Hydraulic filter or suction line is dirty - Check, clean, or change if necessary.
Foot or hand controls are faulty - Repair or change.
Damaged drive pump or motor - Inspect and replace as necessary.

Low power
Plugged hydraulic oil filter - Replace or clean hydraulic filter.
Relief valve is defective or opened - Close or change relief valve.
Worn or defective transmission parts - Check and replace faulty components.
Stuck input drive shaft - Change or repair faulty drive shaft.
Air in hydraulic system - Bleed hydraulic system.

Drive system keeps overheating
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Clogged hydraulic fluid filter - Replace hydraulic filter.
Worn or damaged relief valve - Change or repair defective relief valve.
Drive pump or hydraulic motor is damaged - Repair or replace faulty component.
Oil cooler is clogged - Cooling fins should be cleaned.
Overloaded drive system - Reduce drive system load.

Excessive noise
Oil viscosity is wrong - Drain and refill with proper oil.
Hydraulic system is leaking air - Air bleeding is required.
Damaged drive pump or hydraulic motor - Repair or change faulty component.
Worn or damaged mechanical components of drive system - Inspect drive system and replace faulty components.

Hydraulics Troubleshooting

Hydraulic system is overheated
Hydraulic pressure is incorrect - Set pressure correctly.
Unadjusted or defective main relief valve - Replace or set up the relief valve.
Contaminated hydraulic oil - Change hydraulic oil.
Lack of hydraulic fluid - Fill the hydraulic system with oil.
Hydraulic pump is worn - Repair or install new hydraulic pump.

Boom does not raise or lower
Lift controls failure - Check and repair as required.
Hydraulic pump not working - Repair or install new hydraulic pump.
Hydraulic control valve malfunction - Replace or repair the valve.
Defective hydraulic cylinder - Replace or repair boom cylinder.
Hydraulic oil is insufficient - Fill the system to proper hydraulic oil level.

Bucket won't move
Bucket tilt controls malfunction - Change or repair.
Hydraulic pump not working - Repair or replace pump if necessary.
Hydraulic control valve is faulty - Install a new valve or repair it.
Hydraulic bucket cylinder is defective - Install a new cylinder or repair it.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.

Boom or bucket moves slowly
Worn hydraulic oil pump - Check pump flow and install new pump if necessary.
Leaking hydraulic cylinder - Replace cylinder piston seals.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.
Defective or not adjusted hydraulic control valve - Set properly or repair.
Hydraulic pressure has dropped - Adjust it correctly.

Bucket or boom is jerky
Air in hydraulic system - Bleed air from system.
Dirty hydraulic oil filter element - Service or change the hydraulic filter.
Hydraulic oil is dirty - The oil must be changed.
Cylinder tube or rod scoring - Replace worn component.

Hydraulic pump is noisy
Not enough oil or hydraulic system leaking - Remedy hydraulic leakage or refill oil as necessary.
Hydraulic filter is clogged - Service or replace hydraulic filter.
Dirty suction line - Clean suction line as required.
Pump is sucking air - Air bleeding is required.
Worn pump components - Change or rebuild pump.

Electrical Troubleshooting

Battery won’t charge
Electrical wire connections are corroded or loose - Service or tighten cable connections.
Electrical terminal connectors are faulty - Change terminal connectors.
Dead cell in battery - Use a new battery.
Loose or worn belt - Install a new belt or adjust belt tension.

Starter motor turns slow
Battery capacity is low - Recharge the battery.
Battery is not holding charge - Service or change the battery.
Disconnected wires or corroded battery terminals - Check cable connections and change or clean terminals.

Starter doesn't crank
Battery is discharged or worn - Battery needs to be recharged or replaced.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Low battery voltage - Battery needs to be recharged.
Starter motor is defective - Starter should be changed.