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Bobcat S130 Troubleshooting

The Bobcat S130 skid steer loader is powered by Kubota V2203-M-DI diesel engine with a rated power of 46 hp (34.3 kW) or Kubota V2403-M-DI diesel engine with a rated power of 49 hp (36 kW). The Bobcat S130 is equipped with 1-speed hydrostatic transmission, radial-lift loader boom, 80 HSOC roller chains, and 10x16.5 or 31-12x16.5 tires. The hydraulic system has a pump with fluid flow rate of 16.9 gpm (64 lpm). The hydraulic pressure is 3350 psi (231 bar). The skid steer loader has a rated operating capacity of 1300 lbs (590 kg) and tipping load of 2630 lbs (1195 kg). The lift height is 109.5 inches (2780 mm) to hinge pin, and dump height is 82.7 inches (2100 mm).

Engine Troubleshooting

Diesel hard to start or doesn't start
Air trapped in fuel system - Bleed air.
Fuel filter element is dirty - Change filter element.
Clogged or defective injection nozzles - Test injection nozzles and change if necessary.
Water in the fuel system - Change fuel and repair fuel system.
Valve clearance is not correct - Adjust to proper valve clearance.
Fuel injection pump is not operating properly - Change or repair the pump.

Engine starts but stops suddenly
Dirty air cleaner - Clean or change cleaner.
Fuel filter element is dirty - Change or clean the filter element.
Fuel injection pump is leaking - Repair any leaks.
Dirty or defective injectors - Clean fuel injectors or change it.
Fuel injection pump damage - Install a new fuel pump or repair.

Engine stops unexpectedly during operation
Low coolant temperature - Engine is not warmed up to required temperature.
Dirty fuel filter - Service or replace the filter.
Air in fuel system - Bleed fuel system.
Damaged or dirty injection nozzles - Inspect nozzles and replace if necessary.
Incorrect adjustment of fuel injection pump timing - Adjust fuel injection pump as required.

Engine stalls when idle
Incorrectly adjusted low idle speed - Adjust as required.
Fuel injection pump is broken - Replace injection pump or repair it.
Fuel injector fault - Replace or clean fuel injectors.
Valve clearance is not correct - Check and adjust.

Lack of engine power
Plugged air cleaner - Clean or replace air cleaner element.
Faulty fuel injection nozzles - Test injection nozzles and change if necessary.
Fuel injection pressure is wrong - Adjust pressure to proper level.
The valve clearance is incorrect - Correct valve clearance needs to be set.
Low idle speed setting is incorrect - Adjust as required.
Fuel lines or hoses clogging - Fuel hoses and lines must be clean.
Cylinder head gasket is worn - Replace the gasket as required.
Piston rings are defective or leaking - Change piston rings.

Engine overheating
Insufficient coolant fluid - Add coolant and check the components of cooling system.
Engine oil level low - Add oil to the engine crankcase.
Damaged radiator cap or dirty radiator core - Install new cap or clean radiator.
Loose or defective fan belt - Belt replacement is recommended.
Diesel engine is overloaded - Load reducing required.

Oil pressure too low
Insufficient engine oil - Add oil to the engine crankcase.
Clogged oil filter element - Clean or change engine oil filter.
Wrong oil viscosity - Use proper viscosity oil.
Excessive main bearing oil clearance - Bearings need to be reinstalled.
Worn oil pump - Inspect and change as required.

Abnormal engine noise or knocking
Not enough engine oil - Fill up the oil to required level.
Low coolant temperature - Warm up the engine.
Fuel injection pump timing is not adjusted - Adjust the pump as required.
Too low idle RPM - Adjust the low idle speed.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Connecting rod is worn or not aligned - Align or replace connecting rod.
Broken or worn pistons - Have pistons replaced.

Drive System Troubleshooting

Drive system won't work in one direction or either direction
Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.
Worn drive chain - Check drive chain and change faulty components.
Input drive shaft is worn - Repair or replace.
Relief valver is broken - Change or repair defective relief valve.
Clogged suction line or hydraulic filter - Change hydraulic filter or service suction line.
Defective or worn foot or hand controls - Change or repair.
Damaged drive pump or motor - Repair or replace faulty component.

Lack of power
Dirty hydraulic oil filter - Change or service hydraulic filter.
Relief valve is open or worn - Close or replace relief valve.
Transmission parts are worn or defective - Check and change faulty components.
Damaged input drive shaft - Faulty drive shaft need to be replaced or repair.
There is air in the hydraulic system - Bleed air from hydraulic system.

Drive system keeps overheating
Hydraulic fluid is insufficient - Fill the system to proper hydraulic fluid level.
Hydraulic fluid filter is dirty - Replace or clean hydraulic filter.
Faulty relief valve - Service or change relief valve.
Damaged drive pump or hydraulic motor - Replace or repair faulty component.
Clogged hydraulic oil cooler - Cooling fins should be cleaned.
Drive system is overloaded - Load needs to be reduced.

Drive system makes excessive noise
Wrong oil viscosity - Drain and refill with proper oil.
Air trapped in hydraulic system - Bleed air from system.
Damaged drive pump or hydraulic motor - Check and repair if required.
Mechanical parts of drive system are worn or damaged - Inspect the components for defect or damage and repair as needed.

Hydraulics Troubleshooting

Hydraulic system overheating
Hydraulic pressure is not correct - Set pressure correctly.
Defective or misadjusted main relief valve - Adjust or change relief valve.
Dirty hydraulic oil - Hydraulic oil change required.
Not enough hydraulic oil in the system - Add oil to the hydraulic system.
Defective hydraulic pump - Replace or repair pump if necessary.

Lift arm cannot be raised or lowered
Lift controls failure - Inspect and repair if necessary.
Hydraulic pump is broken - Change or repair hydraulic pump if required.
Hydraulic control valve malfunction - Repair or change hydraulic valve.
Hydraulic cylinder is defective - Repair or change hydraulic cylinder.
Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.

Bucket can't tilt
Bucket controls are faulty - Change or repair.
Hydraulic pump is broken - Change or repair hydraulic pump if required.
Defective hydraulic control valve - Replace or repair the valve.
Defective bucket cylinder - Repair or install a new cylinder.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.

Boom or bucket moves slowly
Hydraulic pump is defective - Check the pump performance and replace it if required.
Leaking hydraulic cylinder - Cylinder seals need to be replaced.
Low hydraulic oil level - Check and refill the hydraulic oil.
Hydraulic control valve is defective or set improper - Set properly or repair.
Hydraulic pressure is low - Hydraulic pressure must be set correctly.

Bucket or boom jerks when working
Air in hydraulic system - Bleed air from system.
Plugged hydraulic oil filter - Service or change the hydraulic filter.
Contaminated hydraulic fluid - Fill up with fresh hydraulic fluid.
Scored cylinder tube or rod - Replace worn component.

Excessive hydraulic pump noise
Leaking hydraulic system or insufficient oil level - Add hydraulic oil or correct system leaks.
Plugged hydraulic filter - Service or replace hydraulic filter.
Plugged suction line - Service the suction line.
Air in hydraulic pump - Need to bleed air.
Pump components are faulty - Install new hydraulic pump or rebuild it.

Electrical Troubleshooting

Battery is not charging
Corroded or loose wire connections - Tighten or service connections.
Battery terminal connectors are faulty - Replace terminal connectors.
Bad cell in battery - Change the battery.
Damaged or loose belt - Belt needs to be adjusted or replaced.

Starter turning slow
Battery voltage is low - Low battery charging, charge as required.
Battery won’t hold charge - Service charging system or replace battery.
Wires are disconnected or battery terminals are corroded - Check battery wires and service or replace terminals.

Starter doesn't crank
Battery is drained or worn - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery power - Battery needs to be recharged.
Faulty starter motor - Replace or repair starter.