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Bobcat A300 Troubleshooting
The
Bobcat A300 all wheel steer loader driveline system components: Kubota
V3800-DI-TE3 4-cylinder direct injection turbocharged liquid-cooled
diesel engine with a rated power of 78 hp (58.3 kW), and 2-speed hydrostatic
transmission. The hydraulic system has a pump with a rated capacity of 20.7
gal/min (78 l/min) or 37 gal/min (138.9 l/min). The Bobcat A300 AWS is equipped
with a vertical-lift loader boom, 120HSOC drive chains, and 12.00x16.5 tires. The skid steer has a boom breakout force of 6600 lbs (2995 kg) and bucket
breakout force of 7165 lbs (3250 kg). The rated operating capacity is 3000 lbs
(1360 kg), and tipping load is 6110 lbs (2770 kg).
| Engine Troubleshooting |
Engine starts up hard or doesn't start
There is air in the fuel system - Bleed the system.
Fuel filter element is clogged - Clean the filter or install new filter element.
Fuel injection nozzles are faulty or clogged - Install a new kit of correctly balanced nozzles.
Water or dirt in fuel system - Drain, flush, and service the system.
Excessive valve clearance - Check and adjust.
Fuel injection pump failure - Replacement or repair required.
Engine starts and then shuts off
Air filter is clogged - Clean or replace element.
Fuel filter element is clogged - Change the filter element.
Fuel injection pump has loose connections - Tighten the connections.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Defective fuel injection pump - Replace or rebuild injection pump.
Diesel shuts off while driving
Coolant temperature is low -Warm up the engine as required.
Dirty fuel filter - Clean or replace the filter.
Air trapped in fuel system - Bleed air.
Fuel injection nozzles fault - Replace injection nozzles.
Timing of fuel injection pump is incorrect - Adjust as recommended.
Engine stalls when idling
Incorrect low idle setting - Correct low idle adjustment.
Faulty fuel injection pump - Change or repair the pump.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Valve clearance is wrong - Adjust valve clearance according to specifications.
Engine loses power
Air filter is dirty - Install new air filter element.
Faulty or dirty injection nozzles - Inspect nozzles and replace if necessary.
Incorrect fuel injection pressure - Adjust to proper pressure.
Improper valve clearance - Check and adjust.
Incorrectly adjusted low idle speed - Normalize low idle speed.
Restricted fuel lines or hoses - Service fuel lines and hoses.
Blown cylinder head gasket - Cylinder-head gasket replacement required.
Worn or damaged piston rings - Piston rings need to be replaced.
Engine overheats
Lack of coolant in cooling system - Fill radiator to proper level and check components for faults.
Low engine oil level - Checking oil level and add if necessary.
Clogged radiator fins or damaged radiator cap - Clean radiator or change cap.
Broken or loose fan belt - Fan belt must be replaced.
Engine is under excessive load - Load reducing required.
Low oil pressure
Low crankcase oil level - Fill up the engine oil.
Clogged oil filter element - Replace or service engine oil filter.
Incorrect oil viscosity - Fill up with the proper oil viscosity.
Incorrect oil clearance in crankshaft bearing - Replace bearings.
Oil pump failure - Inspect and change as required.
Abnormal engine noise or knocking
Not enough engine oil - Add oil to the engine crankcase.
Engine is not preheated - Warm up to required temperature.
Improper setting of fuel injection pump timing - Set the fuel pump timing correctly.
Wrong adjustment of low idle speed - Adjust low idling as recommended.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
Misaligned or defective connecting rod - Need to align or replace the connecting rod.
Worn or broken pistons - Replace the pistons as required.
| Drive System Troubleshooting |
Drive system won't operate in either direction
Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.
Drive chain failure - Inspect drive chain and replace defective parts.
Faulty relief valve - Repair or replace relief valve.
Suction line or hydraulic filter is clogged - Check, clean, or replace if required.
Worn or damaged foot or hand controls - Inspect and repair if necessary.
Drive motor or pump failure - Change or repair faulty component.
Reduced power
Plugged hydraulic oil filter - Replace or clean hydraulic filter.
Relief valve is damaged or open - Close or replace relief valve.
Faulty or damaged transmission components - Check and replace defective components.
Input drive shaft is worn - Rebuild or change the shaft.
Hydraulic system is leaking air - Bleed air from hydraulic system.
Drive system keeps overheating
Low hydraulic fluid level - Checking hydraulic fluid level and add if necessary.
Clogged hydraulic fluid filter - Change or clean hydraulic filter.
Relief valve failure - Repair or replace relief valve.
Damaged drive pump or hydraulic motor - Repair or replace faulty component.
Hydraulic oil cooler is plugged - Cooling fins should be cleaned.
Drive system is overloaded - Load should be reduced.
Drive system is excessively noisy
Oil viscosity is incorrect - Use oil of correct viscosity.
Hydraulic system is leaking air - Air bleeding is required.
Worn hydraulic motor or drive pump - Replace or repair faulty component.
Mechanical components of drive system are worn or damaged - Inspect drive system and replace faulty components.
| Hydraulics Troubleshooting |
Hydraulic system overheated
Hydraulic pressure is not correct - Correct setting is required.
Defective or misadjusted main relief valve - Adjust or change relief valve.
Hydraulic fluid is dirty - The fluid must be changed.
Not enough hydraulic oil in the system - Add oil to the hydraulic system.
Hydraulic pump is faulty - Replace or repair pump if necessary.
Boom can't lift or drop
Faulty lift controls - Replace or repair.
Hydraulic pump malfunction - Repair or replace pump if necessary.
Hydraulic control valve malfunction - Install a new hydraulic valve or repair it.
Damaged hydraulic cylinder - Change or repair lift cylinder.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Bucket fails to tilt
Damaged bucket controls - Inspect and repair if necessary.
Hydraulic pump not working - Replace or repair pump if necessary.
Hydraulic control valve malfunction - Install a new valve or repair it.
Bucket cylinder malfunction - Repair or change cylinder.
Hydraulic fluid is insufficient - Fill up the hydraulic fluid.
Bucket or lift arm functions slowly
Hydraulic pump is worn - Test the pump flow rate and install new pump if required.
Hydraulic cylinder oil leakage - Install new cylinder seals.
Low hydraulic oil level - Checking hydraulic oil level and add if necessary.
Faulty or incorrect setting hydraulic control valve - Adjust correctly or repair.
Low hydraulic pressure - Adjust pressure as required.
Jerky operation of the bucket or boom
Hydraulic system is leaking air - Bleed air from system.
Hydraulic oil filter element clogging - Clean or install new filter.
Dirty hydraulic oil - The oil must be changed.
Cylinder rod or tube is scratched - Change failed component.
Hydraulic pump is excessively noisy
Hydraulic leakage or low oil level - Repair hydraulic leaks or add oil as required.
Clogged hydraulic filter - Service or change hydraulic filter.
Clogged suction line - Service the suction line.
Air trapped in hydraulic pump - Bleed air.
Worn pump parts - Install new hydraulic pump or rebuild it.
| Electrical Troubleshooting |
Battery does not charge
Corroded or loose wire connections - Tighten or clean electrical wiring connections.
Defective battery terminal connectors - Terminal connectors need to be changed.
Bad cell in battery - Install a new battery.
Loose or worn belt - Adjust belt tension or replace belt.
Starter cranks slow
Battery power is low - Battery is drained, recharge it.
Battery won’t hold charge - Service or replace the battery.
Wires are disconnected or battery terminals are corroded - Check wire connections and change or service terminals.
Starter is not working
Battery is drained or defective - Charge or change the battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery voltage - Battery is drained, recharge it.
Starter motor failure - Starter needs to be replaced.
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| SKID STEER LOADERS SPECIFICATIONS |