Home / Skid Steer Loaders / Bobcat Skid Steer Loaders / Bobcat 463

Bobcat 463 Troubleshooting

The Bobcat 463 skid steer loader is powered by 61.1 cu.in (1.0L) Kubota D1005-E2B vertical 3-cylinder water-cooled diesel engine with a rated power of 22.5 hp (16.8 kW) at 3000 rpm. The Bobcat 463 is equipped with a radial-lift loader boom, single-speed hydrostatic transmission, 60HS drive chains, and 23x5.70x12 standard tires. The hydraulic system has a pump with fluid flow rate of 10 gpm (37.9 lpm). The hydraulic pressure is 3000 psi (207 bar). The skid steer loader has a rated operating capacity of 700 lbs (318 kg) and tipping load of 1405 lbs (637 kg). The lift height is 94.5 inches (2400 mm) to hinge pin, and dump height is 74.5 inches (1890 mm).

Engine Troubleshooting

Engine starts up hard or will not start
Air trapped in fuel system - Bleed air.
Fuel filter element clogging - Service or replace the filter.
Burnt or defective injection nozzle - Inspect nozzles and replace if necessary.
Water in the fuel system - Change fuel and repair fuel system.
Valve clearance is not correct - Correct valve clearance needs to be set.
Fuel injection pump is broken - Change or repair the pump.

Engine starts and stops suddenly
Clogged air filter - Service or replace the air filter.
Fuel filter element clogging - Clean or replace the filter.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Fuel injectors are dirty or defective - Inspect fuel injectors and change as required.
Defective fuel injection pump - Install a new pump or rebuild.

Engine stalls after running
Engine is not fully warmed up - Warm up to required temperature.
Fuel filter plugging - Service or replace the filter.
Air in the fuel lines - Bleed the fuel lines.
Damaged or dirty injection nozzles - Replace injection nozzles.
Wrong setting of fuel injection pump timing - Set the fuel pump timing correctly.

Engine stops when idling
Incorrect low idle speed adjustment - Adjust as required.
Fuel injection pump malfunctioning - Replace injection pump or repair it.
Fuel injector fault - Clean fuel injectors or change it.
Incorrect valve clearance - Adjust valve clearance.

Engine power is insufficient
Dirty air filter - Change or service air filter element.
Fuel injection nozzles are clogged or faulty - Inspect nozzles and replace if necessary.
Fuel injection pressure is wrong - Test fuel injection pressure and adjust it correctly.
The valve clearance is incorrect - Check and adjust as required.
Too low idle RPM - Need to adjust idle speed.
Fuel hoses or lines clogging - Fuel lines and hoses need to be cleaned.
Cylinder-head gasket is broken - Change cylinder head gasket.
Leaking or damaged piston rings - Piston rings replacement required.

Engine is overheated
Not enough coolant - The cooling system needs to be refilled and checked for faults.
Lack of engine oil - Fill up the engine oil.
Faulty radiator cap or dirty radiator fins - Clean radiator or install new cap.
Broken or loose fan belt - Replace the fan belt.
Engine overload - Reduce load on the engine.

Insufficient oil pressure
Engine oil level low - Check oil level and add oil as required.
Oil filter clogged - Clean or replace engine oil filter element.
Wrong oil viscosity - Use oil of proper viscosity.
Incorrect crankshaft bearing oil clearance - Bearing needs to be changed.
Oil pump is defective - Check and replace if necessary.

Abnormal engine noise or knocking
Low engine oil level - Fill the crankcase with engine oil.
Engine not warmed up - Warm up to required temperature.
Improper fuel injection timing - Use the correct fuel injection pump timing adjustment.
Incorrectly set low idle speed - Adjust the low idle speed.
Clogged or defective injectors - Clean or replace fuel injectors.
Connecting rod failure or misalignment - Align or replace connecting rod.
Pistons are broken or worn - Have pistons replaced.

Drive System Troubleshooting

Drive system doesn't work in either direction
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Drive chain is worn - Inspect drive chain and replace faulty components.
Relief valve malfunction - Repair or replace.
Suction line or hydraulic filter is clogged - Clean suction line or change hydraulic filter.
Defective foot or hand controls - Repair or replace.
Drive motor or pump is defective - Inspect and change as required.

Reduced power
Hydraulic oil filter is clogged - Replace or service hydraulic filter.
Worn or open relief valve - Change or close relief valve.
Faulty or damaged transmission components - Check and replace defective components.
Input drive shaft failure - Repair or install a new drive shaft.
There is air in the hydraulic system - Bleed air from hydraulic system.

Drive system is overheated
Hydraulic fluid level low - Checking hydraulic fluid level and add if necessary.
Hydraulic fluid filter is clogged - Replace hydraulic filter.
Defective or worn relief valve - Repair or install a new relief valve.
Defective drive pump or hydraulic motor - Inspect and replace as necessary.
Oil cooler is clogged - Clean cooling fins as required.
Overloaded drive system - Load should be reduced.

Excessive noise
Wrong oil viscosity - Use oil of proper viscosity.
Air trapped in hydraulic system - Bleed hydraulic system.
Hydraulic motor or drive pump is defective - Repair or replace faulty component.
Defective or worn mechanical components of drive system - Inspect the components for defect or damage and repair as needed.

Hydraulics Troubleshooting

Hydraulic system has overheating
Hydraulic pressure is not correct - Correct setting is required.
Main relief valve improper adjustment or failure - Adjust or change relief valve.
Contaminated hydraulic fluid - Hydraulic fluid change required.
Not enough hydraulic fluid in the system - Add fluid to the hydraulic system.
Faulty hydraulic oil pump - Install new pump or repair it.

Lift arm can't drop or lift
Damaged lift controls - Replace or repair.
Hydraulic pump is broken - Repair or change pump if required.
Hydraulic control valve is faulty - Install a new hydraulic valve or repair it.
Defective hydraulic cylinder - Replace or repair boom cylinder.
Low hydraulic fluid level - Fill up the hydraulic fluid.

Bucket does not function
Bucket tilt controls are defective - Repair or change.
Hydraulic pump is broken - Repair or change pump if required.
Hydraulic control valve is faulty - Repair or replace the valve.
Bucket cylinder is faulty - Repair or install a new cylinder.
Hydraulic fluid is insufficient - Add fluid as required.

Boom or bucket moves slowly
Hydraulic pump is worn - Flow-rate pump and change pump if necessary.
Oil leaks from hydraulic cylinder - Replace cylinder piston seals.
Hydraulic oil is insufficient - Check and refill the hydraulic oil.
Hydraulic control valve is not set properly or defective - Set correctly or repair.
Hydraulic pressure loss - Correct setting is required.

Lift arm or bucket is jerky
Hydraulic system is leaking air - Bleed hydraulic system.
Plugged hydraulic oil filter - Service or change the hydraulic filter.
Hydraulic oil is contaminated - The oil must be changed.
Cylinder tube or rod is scored - Change damaged component.

Hydraulic pump is noisy
Not enough oil or hydraulic system leaking - Refill hydraulic oil or repair leaks in system.
Clogged hydraulic filter - Clean or install new filter.
Suction line clogging - Clean suction line as required.
Air trapped in hydraulic pump - Remove air from hydraulics.
Damaged pump components - Rebuild or change hydraulic pump.

Electrical Troubleshooting

Battery won’t charge
Corroded or loose wire connections - Tighten or service connections.
Faulty electrical terminal connectors - Replace terminal connectors.
Battery dead cell - Use a new battery.
Belt is worn or loose - Change belt or adjust belt tension.

Starter turns slowly
Low battery output - Low battery charging, charge as required.
Battery won’t hold charge - Service or replace the battery.
Bad terminals or disconnected battery cables - Check wiring connections and replace or clean terminals.

Starter will not work
Battery is drained or defective - Recharge or replace battery.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Battery power is low - Low battery charging, charge as required.
Damaged starter motor - Repair or replace starter.