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Home / Wheel Loaders / Kubota Wheel Loaders / Kubota R310

Kubota R310 Troubleshooting

The Kubota R310 wheel loader is powered by 81.5 cu.in (1.3L) Kubota V1305-E 4-cylinder vertical water-cooled diesel engine with a rated power of 25 hp (18.5 kW) at 2600 rpm. The Kubota R310 is equipped with a hydrostatic transmission, power steering system, wet disc brakes, and 10.00x16.5 standard tires. The hydraulic system has a gear pump with fluid flow rate of 11.1 gpm (42 lpm). The hydraulic pressure is 2465 psi (170 bar). The wheel loader has a rated operating capacity of 1340 lbs (610 kg) and tipping load of 2680 lbs (1220 kg). The maximum lift height is 89" (2260 mm) to hinge pin, and bucket breakout force is 3700 lbs (1680 kg).

Engine Troubleshooting

Diesel engine hard to start or doesn't start
Air in the fuel system - Air bleeding.
Fuel filter plugging - Replace filter element.
Defective or clogged injection nozzle - Clean or replace injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve clearance is not correct - Have it adjusted.
Faulty fuel injection pump - Install a new fuel pump or repair.

Engine starts and stops suddenly
Air filter is dirty - Install new air filter element.
Fuel filter plugged - Clean the filter or install new filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Damaged or clogged injectors - Replace or clean fuel injectors.
Faulty fuel injection pump - Replacement or repair required.

Engine shuts off suddenly while running
Engine is cold - Normalize the temperature by warming up the engine.
Fuel filter element is dirty - Install new filter element.
Air in fuel system - Bleed fuel system.
Clogged injection nozzle - Install a new kit of correctly balanced nozzles.
Timing of fuel injection pump is incorrect - Adjust fuel injection pump as required.

Engine stops while idling
Incorrectly adjusted low idle speed - Adjust as required.
Fuel injection pump is faulty - Repair or change injection pump.
Fuel injector fault - Clean fuel injectors or change it.
Valve clearance is not correct - Adjust valve clearance.

Engine lacks power
Air cleaner is clogged - Clean or replace air cleaner element.
Defective injection nozzle - Install a new kit of correctly balanced nozzles.
Fuel injection pressure is wrong - Test fuel injection pressure and adjust it correctly.
Excessive valve clearance - Correct valve clearance.
Incorrect low idle setting - Normalize low idle speed.
Dirt in the fuel hoses or lines - Clean fuel hoses and lines.
Cylinder head gasket is damaged - Replace the gasket as required.
Piston rings are worn or defective - Replace the piston rings as required.

Engine is overheated
Insufficient coolant - Add coolant fluid and inspect the cooling system for leaks.
Lack of engine oil - Checking oil level and add if necessary.
Radiator fins are dirty or radiator cap is defective - Change cap or clean radiator.
Fan belt is loose or defective - Change as required.
Diesel engine is overloaded - Load reducing is recommended.

Oil pressure too low
Engine oil level low - Check oil level and add oil as required.
Oil filter clogged - Replace or clean engine oil filter element.
Wrong oil viscosity - Drain crankcase and refill with correct oil.
Incorrect crankshaft bearing oil clearance - Bearing replacement required.
Oil pump malfunction - Replace as required.

Engine knocking or noise
Lack of engine oil - Fill up the oil to required level.
Engine not warmed up - Warm up engine as required.
Fuel injection pump timing is wrong - Adjust fuel injection pump as required.
Low idle speed setting is not correct - Adjustment required.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Connecting rod is defective or not aligned - Align or replace connecting rod.
Piston wear or scoring - Pistons need to be replaced.

Hydrostatic Transmission Troubleshooting

Hydrostatic transmission noise
Insufficient oil level or contaminated oil - Change transmission oil or top up to proper level.
Speed control linkage is worn or unadjusted - Change or adjust linkage.
Defective relief valve - Replace valve as required.
Transmission overloaded - Reduce the load is required.
Transmission parts are worm or defective - After disassembling and inspection, change defective components.

Lack of power
Transmission fluid level is low - Checking transmission fluid level and add if necessary.
Relief valve failure - Install a new valve.
Bent or unadjusted speed control pedal linkage - Change or adjust linkage.

Transmission fluid overheated
Lack of transmission fluid - Add fluid to the transmission housing.
Transmission fluid filter element is clogged - Service or replace the transmission fluid filter.
Cooling components are clogged or damaged - Inspect all cooling components and replace or repair if necessary.
Transmission overloaded - The load should be reduced.

Transmission fluid leaking
Damaged seals or gaskets - Change defective gaskets or seal.
High internal transmission case pressure - Repair or replace damaged components.
Plugged transmission fluid return tube - Service or replace return tube.

Hydraulics Troubleshooting

Hydraulic system overheating
Hydraulic pressure is not adjusted correctly - Adjust it correctly.
Main relief valve failure or improper setting - Replace or set up the relief valve.
Contaminated hydraulic oil - Change hydraulic oil.
Not enough hydraulic fluid in the system - Need to add fluid.
Hydraulic pump is worn - Replace or repair pump if necessary.

Lift arm fails to drop or lift
Defective lift controls - Replace or repair.
Hydraulic pump malfunction - Repair or change pump if required.
Hydraulic control valve malfunction - Replace or repair the valve.
Hydraulic cylinder is broken - Repair or replace hydraulic cylinder.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.

Bucket does not tilt
Bucket controls failure - Check and repair as required.
Damaged hydraulic oil pump - Change or repair hydraulic pump if required.
Hydraulic control valve failure - Repair or change the valve.
Damaged bucket cylinder - Repair or replace cylinder.
Low hydraulic fluid level - Fill the system to proper hydraulic fluid level.

Slow boom or bucket operation
Faulty hydraulic oil pump - Check the pump performance and replace it if required.
Oil leaks from hydraulic cylinder - Cylinder seals need to be replaced.
Insufficient hydraulic oil - Check and refill the hydraulic oil.
Defective or not adjusted hydraulic control valve - Repair or set properly.
Hydraulic pressure is low - Set pressure correctly.

Bucket or boom movements are jerky
Air trapped in hydraulic system - Bleed hydraulic system.
Hydraulic oil filter is dirty - Clean or replace the filter.
Hydraulic oil contamination - Fill up with fresh hydraulic oil.
Scratched cylinder rod or tube - Replace damaged component.

Hydraulic pump makes excessive noise
Hydraulic leakage or lack of oil - Correct hydraulic leaks or top up oil as needed.
Hydraulic filter is clogged - Clean or replace the filter.
Clogged suction line - Need to service the suction line.
Air in hydraulic pump - Need to bleed air.
Pump parts are worn out - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery will not charge
Wiring connections are loose or corroded - Tighten or clean connections.
Defective battery terminal clamps - Change terminal clamps.
Battery failing - Install a new battery.
Damaged or loose belt - Adjust belt tension or change the belt.

Starter turns slow
Low battery voltage - Battery is drained, recharge it.
Battery is draining quickly - Service charging system or replace battery.
Faulty battery terminals or disconnected cables - Check cables and service or change terminals.

Starter is not cranking
Battery is discharged or defective - Battery needs to be recharged or replaced.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Low battery voltage - Recharge the battery.
Starter motor is defective - Replace or repair starter.

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WHEEL LOADERS SPECIFICATIONS

Wheel Loaders, Skid Steers, and Compact Track Loaders