New Holland LS190B Skid Steer Troubleshooting

The New Holland LS190B skid steer loader driveline system components: a 274 cu.in (4.5L) CNH 445T/M2 vertical 4-cylinder direct injection turbocharged diesel engine with a rated power of 80 hp (60 kW), and 2-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 21.9 gal/min (83 l/min). The system pressure is 3050 psi (210 bar). The New Holland LS190B is equipped with 100 HD roller chains and 14x17.5 tires. The skid steer loader has a boom lifting force of 5200 lbs (2360 kg) and bucket breakout force of 6035 lbs (2737 kg). The rated operating capacity is 2800 lbs (1270 kg), and tipping load is 5600 lbs (2450 kg).

Engine Troubleshooting

Engine starts hard or won't start

Air in fuel system - Bleed fuel system.
Fuel filter element is clogged - Service the filter.
Clogged or burnt injection nozzle - Install a new kit of correctly balanced nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Excessive valve clearance - Adjust valve clearance according to specifications.
Defective fuel injection pump - Repair or replace injection pump.

Engine starts but then stalls

Air filter is clogged - Service or replace the air filter.
Fuel filter plugging - Change the filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Defective fuel injection pump - Repair or install a new fuel pump.

Engine stalls during operation

Coolant temperature is low - Warm up the engine as required.
Clogged fuel filter - Replace the filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are faulty or clogged - Test injection nozzles and change if necessary.
Wrong setting of fuel injection pump timing - Adjust as recommended.

Engine stalls at idle

Improperly adjusted low idle speed - Correct the settings.
Fuel injection pump failure - Repair or install new pump.
Defective fuel injectors - Test and replace fuel injectors if necessary.
Incorrect valve clearance - Check and adjust.

Lack of engine power

Clogged air cleaner - Clean or replace element.
Damaged or dirty injection nozzles - Change fuel injection nozzles.
Fuel injection pressure is wrong - Check the fuel injection pressure and adjust if necessary.
Incorrect valve clearance - Correct valve clearance.
Low idle speed setting is incorrect - Adjust low idle speed.
Fuel lines or hoses are clogged - Clean fuel system hoses and lines.
Leaking cylinder head gasket - Replace the gasket as required.
Worn or broken piston rings - Change piston rings.

Engine is overheated

Not enough coolant - Add coolant fluid and inspect the cooling system for leaks.
Insufficient engine oil - Fill up the oil to required level.
Radiator fins are clogged or radiator cap is faulty - Clean radiator or install new cap.
Loose or defective fan belt - Belt replacement is recommended.
Engine overload - Load reducing is recommended.

Oil pressure is insufficient

Oil level is low - Checking oil level and add if necessary.
Dirty oil filter element - Clean or replace engine oil filter element.
Incorrect engine oil Drain and refill with oil of correct grade and viscosity.
Incorrect oil clearance in crankshaft bearing - Bearing replacement required.
Oil pump malfunction - Check and replace if necessary.

Engine knocking or noise

Engine oil insufficient - Check oil level and add oil as required.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Incorrect adjustment of fuel injection pump timing - Adjust the pump as required.
Low idle speed setting is incorrect - Adjust as required.
Fuel injectors are faulty or clogged - Replace fuel injectors.
Misaligned or faulty connecting rod - Need to change or align the connecting rod.
Worn or scored pistons - Pistons need to be replaced.

Drive System Troubleshooting

Drive system doesn't operate in one direction or either direction

Low hydraulic fluid level - Check and refill the hydraulic fluid.
Drive chain malfunction - Inspect drive chain and replace defective components.
Damaged input drive shaft - Repair or replace.
Stuck relief valve - Repair or install a new relief valve.
Clogged hydraulic filter or suction line - Replace hydraulic filter or clean suction line.
Foot or hand controls are defective - Check and repair as required.
Drive motor or pump failure - Inspect and replace as necessary.

Lack of power

Dirty hydraulic oil filter - Check, clean, or change as necessary.
Opened or defective relief valve - Close or change relief valve.
Transmission components are faulty or damaged - Inspect and change faulty parts.
Input drive shaft malfunction - Replace drive shaft.
Air in the hydraulic system - Bleed air from hydraulic system.

Drive system overheats

Hydraulic oil level is low - Fill the system to proper hydraulic oil level.
Hydraulic fluid filter is dirty - Change hydraulic filter.
Stuck relief valve - Change or repair relief valve.
Hydraulic motor or drive pump is defective - Change or repair faulty component.
Clogged hydraulic oil cooler - Cooling fins need to be cleaned.
Transmission overloading - Reduce loading.

Excessive noise

Oil viscosity is wrong - Use the specified type of oil.
Air leaks in hydraulic system - Bleed air from hydraulic system.
Hydraulic motor or drive pump failure - Repair or change faulty component.
Defective or worn mechanical parts of drive system - Check the parts and replace if required.

Hydraulics Troubleshooting

Hydraulic system overheating

Incorrect hydraulic pressure setting - Set pressure correctly.
Misadjusted or defective main relief valve - Replace or set up the relief valve.
Hydraulic fluid is dirty - The fluid must be changed.
Lack of hydraulic fluid - Add fluid to the hydraulic system.
Defective hydraulic pump - Repair or install new hydraulic pump.

Boom won't lower or raise

Damaged lift controls - Change or repair.
Defective hydraulic pump - Repair or replace pump if necessary.
Hydraulic control valve malfunction - Install a new valve or repair it.
Hydraulic cylinder is faulty - Repair or install a new lift cylinder.
Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.

Bucket tilt does not work

Bucket tilt controls are defective - Replace or repair.
Hydraulic pump malfunction - Repair or change pump if required.
Hydraulic control valve is defective - Repair or replace hydraulic valve.
Faulty hydraulic bucket cylinder - Replace or repair cylinder.
Low hydraulic oil level - Fill the system to proper hydraulic oil level.

Bucket or lift arm functions slowly

Worn hydraulic oil pump - Check hydraulic pump flow and replace pump if necessary.
Leaking hydraulic cylinder - Install new cylinder seals.
Hydraulic oil is insufficient - Fill the system to proper hydraulic oil level.
Hydraulic control valve is faulty or out of adjustment - Repair or set correctly.
Low hydraulic pressure - Set pressure correctly.

Jerky operation of the bucket or boom

Air leaks in hydraulic system - Need to bleed air.
Plugged hydraulic oil filter - Service or replace the hydraulic filter.
Contaminated hydraulic fluid - Fill up with fresh hydraulic fluid.
Cylinder tube or rod scoring - Replace worn component.

Hydraulic pump makes excessive noise

Hydraulic leakage or low oil level - Repair hydraulic leaks or add oil as required.
Hydraulic filter is dirty - Clean or replace the filter.
Plugged suction line - Clean suction line as required.
Pump sucks air - Remove air from hydraulics.
Faulty pump components - Rebuild or install new pump.

Electrical Troubleshooting

Battery does not charge

Wiring connections are corroded or loose - Clean or tighten connections.
Faulty battery terminal clamps - Terminal clamps need to be replaced.
Defective battery - Change the battery.
Loose or worn belt - Adjust belt tension or change the belt.

Starter turning slow

Low battery capacity - Charge the battery.
Battery is not holding charge - Battery needs to be serviced or replaced.
Disconnected wiring or bad battery terminals - Connect wires properly or change terminals.

Starter is not working

Battery is low or faulty - Change or recharge battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery output - Recharge the battery.
Defective starter motor - Starter needs to be replaced.