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Home / Wheel Loaders / Kubota Wheel Loaders / Kubota RT220-2

Kubota RT220-2 Troubleshooting

The Kubota RT220-2 wheel loader is powered by Kubota D1105 3-cylinder indirect injection water-cooled diesel engine with a rated power of 26 hp (19 kW) at 2050 rpm. The Kubota RT220-2 is equipped with a two-speed hydrostatic transmission, power steering system, hydraulic wet disc brakes, and 10.0/75x15.3 standard tires. The hydraulic system has a pump with fluid flow rate of 11.9 gpm (45 lpm). The hydraulic pressure is 2175 psi (150 bar). The wheel loader has a rated operating capacity of 1255 lbs (570 kg) and tipping load of 2510 lbs (1140 kg). The max lift height is 96.5 inches (2450 mm) to hinge pin, and boom breakout force is 5885 lbs (2675 kg).

Engine Troubleshooting

Engine starts up hard or will not start
Air in the fuel system - Air bleeding.
Fuel filter plugging - Service the filter.
Damaged or dirty injection nozzles - Clean or change injection nozzles.
Water or dirt in fuel system - Drain, flush, and service the system.
Improper valve clearance - Check and adjust as required.
Damaged fuel injection pump - Rebuild or install a new injection pump.

Diesel starts and suddenly stops
Air filter is plugged - Clean or change.
Fuel filter plugged - Install new filter element.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Defective or clogged fuel injectors - Clean fuel injectors or change it.
Fuel injection pump is not operating properly - Replace injection pump or repair it.

Engine stops running suddenly
Engine not warmed up - Warm up the engine.
Fuel filter plugging - Clean the filter or install new filter element.
Air in the fuel lines - Bleed the fuel lines.
Faulty fuel injection nozzles - Clean or replace injection nozzles.
Wrong setting of fuel injection pump timing - Set the fuel pump timing correctly.

Engine stalling at idle
Incorrect low idle setting - Correct low idle adjustment.
Fuel injection pump is not operating properly - Install a new pump or rebuild.
Defective fuel injectors - Change or clean fuel injectors.
The valve clearance is incorrect - Adjust to proper valve clearance.

Low engine power
Dirty air filter - Change or service air filter element.
Defective injection nozzle - Replace injection nozzles.
Incorrect fuel injection pressure - Adjust to correct pressure.
The valve clearance is not adjusted - Need to adjust valve clearance.
Too low idle RPM - Normalize low idle speed.
Fuel lines or hoses are dirty - Fuel lines and hoses need to be cleaned.
Cylinder head gasket is worn - Install a new gasket.
Worn or broken piston rings - Change piston rings.

Engine overheated
Engine coolant is insufficient - Top up coolant fluid and check system for leaks.
Low engine oil level - Check and refill engine oil.
Faulty radiator cap or dirty radiator fins - Clean radiator or change cap.
Damaged or worn fan belt - Replace the fan belt.
Engine overload - Reduce engine load.

Insufficient oil pressure
Low crankcase oil level - Add oil to the engine crankcase.
Plugged engine oil filter - Change or clean engine oil filter element.
Wrong oil viscosity - Use correct viscosity oil.
Incorrect oil clearance in crankshaft bearing - Bearing needs to be changed.
Worn oil pump - Check and replace if necessary.

Engine noises or knocks
Low engine oil level - Fill up the engine oil.
Engine is cold - Normalize the temperature by warming up the engine.
Timing of fuel injection pump is incorrect - Adjust the pump as required.
Incorrectly set low idle speed - Test and adjust.
Fuel injector fault - Test and replace fuel injectors if necessary.
Connecting rod is worn or not aligned - Align or change connecting rod.
Worn or scored pistons - Pistons need to be replaced.

Hydrostatic Transmission Troubleshooting

Hydrostatic transmission noise
Low transmission oil level or contaminated oil - Change transmission oil or top up to proper level.
Speed control linkage is defective or unadjusted - Repair or adjust linkage.
Relief valve failure - Install a new relief valve.
Transmission is under excessive load - Reduce transmission load.
Damaged or worn components of hydrostatic transmission - After disassembly and inspection, replace defective components.

Lack of power
Transmission fluid level is low - Checking transmission fluid level and add if necessary.
Relief valve is stuck - Change relief valve.
Speed control linkage is defective or unadjusted - Adjust or change linkage.

Transmission fluid overheating
Low fluid level - Fill the transmission housing to proper fluid level.
Transmission oil filter is clogged - Clean or replace the transmission filter.
Plugged or defective cooling components - Check all cooling components and clean or replace if required.
Transmission overload - The load should be reduced.

Transmission fluid leakage
Worn seals or gaskets - Gaskets or seal replacement required.
High internal transmission case pressure - Check hydrostatic transmission components for defect or damage and change if necessary.
Clogged oil return pipe - Clean or change return pipe.

Hydraulics Troubleshooting

Hydraulic system overheats
Hydraulic pressure is not adjusted correctly - Adjust pressure as required.
Main relief valve is damaged or adjusted improperly - Replace or set up the relief valve.
Dirty hydraulic fluid - Hydraulic fluid change required.
Hydraulic oil level is low - Fill up the hydraulic oil.
Faulty hydraulic oil pump - Install new pump or repair it.

Lift arm fails to drop or lift
Lift controls failure - Change or repair.
Hydraulic pump failure - Change or repair hydraulic pump if required.
Hydraulic control valve malfunction - Replace or repair the valve.
Hydraulic cylinder is broken - Install a new boom cylinder or repair it.
Insufficient hydraulic oil - Fill the system to proper hydraulic oil level.

Bucket tilt does not work
Faulty bucket tilt controls - Repair or change.
Hydraulic pump failure - Repair or replace pump if necessary.
Hydraulic control valve malfunction - Repair or change the valve.
Broken bucket cylinder - Repair or replace cylinder.
Hydraulic fluid is insufficient - Add fluid as required.

Boom or bucket runs slowly
Hydraulic pump is worn - Check hydraulic pump flow and replace pump if necessary.
Oil leaks from hydraulic cylinder - Correct leakage by changing the seals.
Hydraulic fluid level low - Add fluid as required.
Worn or unadjusted hydraulic control valve - Repair or set properly.
Low hydraulic pressure - Adjust pressure as required.

Bucket or boom is moving jerkily
Air in hydraulic system - Air bleeding is required.
Clogged hydraulic oil filter element - Clean or install new filter.
Hydraulic fluid is dirty - Change hydraulic fluid.
Cylinder tube or rod scoring - Replace defective component.

Excessive hydraulic pump noise
Hydraulic system leaking or not enough oil - Remedy hydraulic leakage or refill oil as necessary.
Hydraulic filter is dirty - Clean or install new filter.
Dirty suction line - Clean suction line as required.
Pump is sucking air - Remove air from hydraulics.
Faulty pump parts - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery does not charge
Wiring connections are loose or corroded - Clean or tighten wiring connections.
Battery terminal clamps are faulty - Terminal clamps should be changed.
Faulty cell in battery - Replace the battery.
Belt is loose or defective - Adjust belt tension or replace belt.

Starter cranks slowly
Battery capacity is low - Battery is drained, charge it.
Battery is not holding charge - Service charging system or install new battery.
Corroded battery terminals or disconnected wires - Check cables and service or change terminals.

Starter will not crank
Battery is drained or worn - Change or recharge battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery output - Battery is drained, recharge it.
Damaged starter motor - Repair or change starter.

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WHEEL LOADERS SPECIFICATIONS

Caterpillar