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New Holland LS190 Troubleshooting

The New Holland LS190 skid steer loader driveline system components: a 304 cu.in (5L) New Holland 450/NC 4-cylinder naturally aspirated liquid-cooled diesel engine with a rated power of 75 hp (55.6 kW), and 1-speed or 2-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 20 gal/min (75.7 l/min). The system relief pressure is 2600 psi (176 bar). The New Holland LS190 is equipped with 100 HD roller chains and 14x17.5 tires. The skid steer loader has a lift height of 124.1" (3150 mm) to hinge pin and dump height of 100.6" (2555 mm). The rated operating capacity is 2800 lbs (1270 kg), and tipping load is 5600 lbs (2540 kg).

Engine Troubleshooting

Engine starts up hard or doesn't start
Air in the fuel system - Air bleeding.
Fuel filter element clogging - Clean or change the filter.
Clogged or defective injection nozzles - Check injection nozzles and replace if required.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump malfunctioning - Change pump or rebuild it.

Diesel starts and stalls immediately
Plugged air cleaner - Clean or replace element.
Dirty fuel filter - Change filter element.
Fuel injection pump is leaking - Repair any leaks.
Fuel injectors are dirty or defective - Clean fuel injectors or change it.
Fuel injection pump malfunctioning - Replace or repair injection pump.

Engine stops suddenly during operation
Engine is not preheated - Normalize the temperature by warming up the engine.
Dirty fuel filter - Change the filter element.
Air in fuel tank - Bleed fuel tank.
Defective or clogged injection nozzle - If necessary, replace with a new nozzle.
Improper fuel injection timing - Adjust according to specifications.

Engine stalls when idle
Low idle speed setting is incorrect - Correct low idle adjustment.
Fuel injection pump is broken - Change or repair the pump.
Damaged or clogged injectors - Change or clean fuel injectors.
Improper valve clearance - Correct valve clearance needs to be set.

Diesel engine loses power
Plugged air cleaner - Clean or replace air cleaner element.
Clogged or burnt injection nozzle - Clean or replace injection nozzles.
Fuel injection pressure is wrong - Check the fuel injection pressure and adjust if necessary.
Valve out of adjustment - Adjust valve clearance.
Incorrect low idle setting - Adjust as required.
Clogged fuel lines or hoses - Fuel lines and hoses need to be cleaned.
Cylinder head gasket defective - Gasket should be replaced.
Leaking or damaged piston rings - Piston rings need to be replaced.

Engine overheats
Engine coolant is insufficient - Fill the cooling system and check components for leaks or other faults.
Insufficient engine oil - Check oil level and add oil as required.
Faulty radiator cap or dirty radiator fins - Clean radiator or replace cap.
Fan belt is worn or faulty - Belt change is required.
Engine is overloaded - Load reducing is recommended.

Oil pressure is insufficient
Engine oil insufficient - Add oil as required.
Oil filter element clogging - Replace or clean engine oil filter element.
Incorrect oil viscosity - Fill up with the correct oil viscosity.
Incorrect crankshaft bearing oil clearance - Install new bearings.
Oil pump is defective - Replace as required.

Abnormal engine knocking or noise
Low engine oil level - Fill up the engine oil.
Low coolant temperature - Warm up the engine.
Fuel injection pump timing is wrong - Set up as recommended.
Low idle speed set incorrectly - Adjust the low idle speed.
Dirty or defective injectors - Clean or replace fuel injectors.
Faulty or misaligned connecting rod - Need to change or align the connecting rod.
Scored or worn pistons - Pistons replacement required.

Drive System Troubleshooting

Drive system won't work in one direction or either direction
Low hydraulic fluid level - Add fluid as required.
Drive chain failure - Inspect drive chain and replace faulty components.
Defective input drive shaft - Drive shaft need to be replaced or repair.
Defective or worn relief valve - Repair or install a new relief valve.
Suction line or hydraulic filter is dirty - Check, clean, or change if necessary.
Worn or damaged foot or hand controls - Inspect and repair if necessary.
Drive pump or motor malfunction - Inspect and replace as necessary.

Power is too low
Dirty hydraulic oil filter - Change hydraulic filter.
Relief valve is defective or opened - Replace or close relief valve.
Worn or defective transmission parts - Inspect and replace faulty parts.
Input drive shaft is defective - Faulty drive shaft need to be replaced or repair.
Air in hydraulic system - Need to bleed air.

Drive system overheats
Insufficient hydraulic oil - Need to add oil.
Dirty hydraulic fluid filter - Replace hydraulic filter.
Relief valver is broken - Repair or install a new relief valve.
Damaged drive pump or hydraulic motor - Repair or replace faulty component.
Oil cooler is clogged - Cooling fins need to be cleaned.
Drive system is overloaded - Reduce the load.

Drive system is excessively noisy
Wrong oil viscosity - Use oil of proper viscosity.
Air in hydraulic system - Bleed hydraulic system.
Hydraulic motor or drive pump is defective - Check and repair if required.
Mechanical parts of drive system are worn - Check the components and replace if necessary.

Hydraulics Troubleshooting

Hydraulic system is overheated
Hydraulic pressure incorrectly adjusted - Adjust it correctly.
Main relief valve improper adjustment or failure - Set up or change the relief valve.
Hydraulic fluid contamination - The fluid must be changed.
Hydraulic fluid level is insufficient - Add fluid to the hydraulic system.
Defective hydraulic pump - Repair or install new hydraulic pump.

Boom does not raise or lower
Defective lift controls - Repair or change.
Hydraulic pump malfunction - Repair or replace pump if necessary.
Faulty hydraulic control valve - Repair or change hydraulic valve.
Hydraulic cylinder failure - Change or repair lift cylinder.
Hydraulic oil level low - Need to add oil.

Bucket can't tilt
Faulty bucket tilt controls - Repair or replace.
Defective hydraulic pump - Change or repair hydraulic pump if required.
Hydraulic control valve is defective - Change or repair hydraulic valve.
Damaged bucket cylinder - Install a new cylinder or repair it.
Hydraulic fluid is insufficient - Checking hydraulic fluid level and add if necessary.

Bucket or lift arm functions slowly
Defective hydraulic pump - Check the pump performance and replace it if required.
Leaking hydraulic cylinder - Correct leakage by changing the seals.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.
Worn or unadjusted hydraulic control valve - Repair or adjust properly.
Low hydraulic pressure - Adjust pressure correctly.

Lift arm or bucket is jerky
There is air in the hydraulic system - Bleed hydraulic system.
Hydraulic oil filter element is dirty - Clean or change the filter.
Hydraulic oil is dirty - Change hydraulic oil.
Scored cylinder tube or rod - Replace defective component.

Excessive hydraulic pump noise
Insufficient oil level or leaking hydraulic system - Correct hydraulic leaks or top up oil as needed.
Clogged hydraulic filter - Service or replace hydraulic filter.
Clogged suction line - Need to service the suction line.
Pump sucks air - Bleed air from hydraulics.
Damaged pump parts - Replace or rebuild the pump.

Electrical Troubleshooting

Battery won’t charge
Wiring connections are loose or corroded - Service or tighten cable connections.
Defective electrical terminal connectors - Terminal connectors need to be changed.
Battery bad cell - Use a new battery.
Loose or damaged belt - Adjust belt tension or replace belt.

Starter cranks slow
Low battery power - Charge the battery.
Battery will not hold charge - Battery needs service or replacement.
Faulty battery terminals or disconnected cables - Check cables and clean or change terminals.

Starter motor is not working
Battery is drained or worn - Change or recharge battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery power is low - Battery is drained, charge it.
Damaged starter motor - Repair or change starter.