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New Holland LS185B Troubleshooting

The New Holland LS185B skid steer loader is powered by 205 cu.in (3.4L) New Holland 334TM2 3-cylinder turbocharged liquid-cooled diesel engine with a rated power of 72 hp (54 kW) at 2300 rpm. The New Holland LS185B is equipped with a radial-lift loader boom, one-speed or two-speed hydrostatic transmission, 100 HV drive chains, and 12x16.5 standard tires. The hydraulic system has a pump with fluid flow rate of 19.3 gpm (73.1 lpm) or 34.7 gpm (131.5 lpm). The skid steer loader has a rated operating capacity of 2500 lbs (1134 kg) and tipping load of 5000 lbs (2270 kg). The lift height is 124.6 inches (3165 mm) to hinge pin, and dump height is 100 inches (2540 mm).

Engine Troubleshooting

Engine starts up hard or will not start
Air in fuel system - Bleed fuel system.
Fuel filter element clogging - Clean or change the filter.
Fuel injection nozzles are faulty or clogged - Check injection nozzles and replace if required.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Incorrect valve clearance - Check and adjust.
Fuel injection pump is not operating properly - Install a new fuel pump or repair.

Diesel starts and stops
Clogged air filter - Install new air filter element.
Fuel filter plugged - Service or replace the filter.
Fuel injection pump is leaking - Repair any leaks.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Fuel injection pump is defective - Replacement or repair required.

Engine stalls while running
Low coolant temperature - Normalize the temperature by warming up the engine.
Fuel filter is plugged - Change filter element.
Air in the fuel lines - Bleed the fuel lines.
Clogged or defective injection nozzles - Test injection nozzles and change if necessary.
Timing of fuel injection pump is incorrect - Adjust according to specifications.

Engine shuts off while idling
Incorrectly adjusted low idle speed - Adjust low idling as recommended.
Fuel injection pump is defective - Repair or replace injection pump.
Fuel injectors are faulty or clogged - Replace fuel injectors.
Valve out of adjustment - Need to adjust valve clearance.

Diesel power loss
Clogged air cleaner - Clean or change cleaner.
Dirty or faulty injection nozzles - Check injection nozzles and replace if required.
Uneven fuel injection pressure - Adjust to proper pressure.
Valve out of adjustment - Adjust valve clearance.
Incorrectly set low idle speed - Normalize low idle speed.
Fuel lines or hoses clogging - Fuel lines and hoses need to be cleaned.
Cylinder head gasket is defective - Install a new gasket.
Defective or worn piston rings - Piston rings replacement required.

Engine overheated
Low coolant level - Add coolant and check the components of cooling system.
Lack of engine oil - Check and refill engine oil.
Clogged radiator core or damaged radiator cap - Replace cap or clean radiator.
Broken or loose fan belt - Change as required.
Diesel engine is overloaded - Load reducing required.

Low oil pressure
Oil level is low - Fill the crankcase with oil.
Oil filter clogging - Change or service engine oil filter.
Oil grade or viscosity is incorrect - Drain and refill with oil of correct grade and viscosity.
Crankshaft bearing oil clearance is incorrect - Bearings need to be reinstalled.
Worn oil pump - Check and replace if necessary.

Abnormal engine knocking or noise
Lack of engine oil - Need to add engine oil.
Low coolant temperature - Warm up engine as required.
Improper setting of fuel injection pump timing - Adjust the pump as required.
Incorrect low idle speed adjustment - Adjust low idling as recommended.
Fuel injector fault - Change or clean fuel injectors.
Connecting rod misalignment or failure - Alignment procedure or replacement is required.
Pistons are broken or worn - Pistons replacement required.

Drive System Troubleshooting

Drive system doesn't function in one direction or either direction
Hydraulic fluid is insufficient - Fill the system to proper hydraulic fluid level.
Drive chain failure - Inspect drive chain and replace faulty components.
Relief valve worn or defective - Change or repair defective relief valve.
Plugged hydraulic filter or suction line - Replace hydraulic filter or clean suction line.
Hand or foot controls failure - Replace or repair.
Worn drive motor or pump - Replace or repair faulty component.

Lack of power
Plugged hydraulic oil filter - Check, clean, or replace as required.
Relief valve is open or worn - Change or close relief valve.
Transmission parts are damaged or faulty - Check and change faulty components.
Input drive shaft failure - Rebuild or change the shaft.
Air leaks in hydraulic system - Air bleeding is required.

Drive system is overheated
Hydraulic oil is insufficient - Need to add oil.
Dirty hydraulic fluid filter - Replace or clean hydraulic filter.
Worn or defective relief valve - Repair or replace.
Drive pump or hydraulic motor malfunction - Inspect and replace as necessary.
Dirty oil cooler - Clean cooling fins as required.
Drive system overload - Reduce the load.

Excessive noise
Oil viscosity is too heavy - Use oil of proper viscosity.
Air trapped in hydraulic system - Need to bleed air.
Hydraulic motor or drive pump failure - Check and repair if required.
Worn or damaged mechanical parts of drive system - Check the parts for defect or damage and change if required.

Hydraulics Troubleshooting

Hydraulic system overheats
Hydraulic pressure is incorrect - Set pressure correctly.
Faulty or improperly adjusted main relief valve - Replace or set up the relief valve.
Contaminated hydraulic oil - Change hydraulic oil.
Lack of hydraulic oil - Fill up the hydraulic oil.
Worn hydraulic oil pump - Repair or replace pump if necessary.

Boom won't lower or raise
Lift controls malfunction - Replace or repair.
Hydraulic pump malfunction - Repair or replace pump if necessary.
Hydraulic control valve is defective - Install a new valve or repair it.
Hydraulic cylinder not working - Repair or install a new lift cylinder.
Hydraulic oil level low - Need to add oil.

Bucket tilt does not work
Defective bucket controls - Change or repair.
Hydraulic pump is broken - Install new pump or repair it.
Hydraulic control valve failure - Replace or repair the valve.
Faulty hydraulic bucket cylinder - Install a new cylinder or repair it.
Hydraulic oil level low - Need to add oil.

Boom or bucket is working slowly
Worn hydraulic oil pump - Flow-rate hydraulic pump and replace pump if necessary.
Leaking hydraulic cylinder - Replace cylinder piston seals.
Insufficient hydraulic oil - Fill the system to proper hydraulic oil level.
Hydraulic control valve is not set properly or defective - Repair or set properly.
Low hydraulic pressure - Adjust pressure correctly.

Bucket or boom is working jerkily
Air in hydraulic system - Bleed hydraulic system.
Hydraulic oil filter element clogging - Service or change the hydraulic filter.
Hydraulic oil contamination - Change hydraulic oil.
Cylinder rod or tube is scuffed - Change failed component.

Hydraulic pump is excessively noisy
Insufficient oil level or leaking hydraulic system - Remedy hydraulic leakage or refill oil as necessary.
Hydraulic filter is dirty - Change or clean oil filter.
Plugged suction line - Need to clean the suction line.
Air enters the pump - Need to bleed air.
Pump parts are faulty - Install new hydraulic pump or rebuild it.

Electrical Troubleshooting

Battery won’t charge
Wiring connections are loose or corroded - Clean or tighten connections.
Electrical terminal connectors are faulty - Terminal connectors need to be changed.
Faulty cell in battery - Change the battery.
Worn or loose belt - Change belt or adjust belt tension.

Starter turns slow
Low battery voltage - Charge the battery.
Battery discharges quickly - Service charging system or install new battery.
Bad battery terminals or disconnected wiring - Connect wires properly or change terminals.

Starter will not crank
Battery is drained or defective - Replace or charge as required.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery output - Low battery charging, charge as required.
Starter motor is faulty - Change or repair starter.