Bobcat S570 Skid Steer Troubleshooting

The Bobcat S570 skid steer loader is powered by 158.7 cu.in (2.6L) Kubota V2607 four-cylinder turbocharged diesel engine with a rated power of 61 hp (45.5 kW) at 2700 rpm. The Bobcat S570 is equipped with a single-speed or two-speed hydrostatic transmission, vertical-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 17.1 gpm (64.7 lpm). The hydraulic pressure is 3550 psi (245 bar). The skid steer loader has a rated operating capacity of 1950 lbs (885 kg) and tipping load of 3900 lbs (1770 kg). The lift height is 119 inches (3025 mm) to hinge pin, and dump height is 91.3 inches (2320 mm).

Engine Troubleshooting

Engine hard to start or will not start

Air in the fuel lines - Bleed the fuel lines.
Fuel filter element clogging - Change filter element.
Faulty or dirty injection nozzles - Inspect nozzles and replace if necessary.
Water in the fuel system - Change fuel and repair fuel system.
Excessive valve clearance - Check and adjust.
Fuel injection pump is defective - Replacement or repair required.

Diesel starts and then shuts off

Plugged air filter - Install new air filter element.
Dirty fuel filter - Change filter element.
Poor fuel injection pump tightness - Look for any leaks of fuel pump, tighten it fast.
Defective or clogged fuel injectors - Clean fuel injectors or change it.
Faulty fuel injection pump - Replace or repair injection pump.

Engine stops running suddenly

Engine is not preheated - Warm up the engine.
Fuel filter plugging - Change filter element.
There is air in the fuel system - Bleed the system.
Dirty or damaged injection nozzles - Clean or replace injection nozzles.
Improper fuel injection timing - Adjust the pump as required.

Engine stops when idle

Incorrectly adjusted low idle speed - Adjust the low idle speed.
Fuel injection pump is damaged - Repair or install a new fuel pump.
Fuel injectors are dirty or defective - Clean fuel injectors or change it.
Incorrect valve clearance - Adjust valve clearance.

Engine power is insufficient

Clogged air filter - Replace or clean air filter element.
Fuel injection nozzles fault - Clean or change injection nozzles.
Fuel injection pressure is incorrect - Adjust pressure to proper level.
The valve clearance is incorrect - Correct valve clearance.
Low idle speed setting is incorrect - Correct the settings.
Dirty fuel lines or hoses - Clean fuel system hoses and lines.
Leaking cylinder head gasket - Install a new gasket.
Piston rings are damaged or leaking - Change piston rings.

Engine overheating

Engine coolant is insufficient - Top up coolant fluid and check system for leaks.
Insufficient engine oil - Need to add engine oil.
Radiator fins are dirty or radiator cap is defective - Clean radiator or replace cap.
Damaged or worn fan belt - Install new fan belt.
Diesel engine is overloaded - Load reducing is recommended.

Insufficient oil pressure

Insufficient engine oil - Check and refill the oil.
Clogged oil filter - Service or replace engine oil filter.
Improper type of engine oil - Drain and refill with oil of correct grade and viscosity.
Main bearing oil clearance is excessive - Bearing replacement required.
Oil pump failure - Repair or replace.

Abnormal engine noise or knocking

Not enough engine oil - Checking oil level and add if necessary.
Low coolant temperature - Warm up the engine.
Incorrect adjustment of fuel injection pump timing - Set the fuel pump timing correctly.
Incorrectly adjusted low idle speed - Adjust the low idle speed.
Fuel injector fault - Inspect fuel injectors and change as required.
Connecting rod is not aligned or worn - Need to replace or align the connecting rod.
Worn or broken pistons - Replace the pistons.

Drive System Troubleshooting

Drive system won't work in one direction or either direction

Hydraulic fluid is insufficient - Add fluid as required.
Drive chain is worn - Check drive chain and change faulty parts.
Damaged input drive shaft - Drive shaft need to be replaced or repair.
Relief valve is stuck - Repair or replace.
Hydraulic filter or suction line is plugged - Check, clean, or change if necessary.
Hand or foot controls malfunction - Repair or change.
Defective drive pump or motor - Repair or replace faulty component.

Low power

Clogged hydraulic oil filter - Replace or service hydraulic filter.
Relief valve is damaged or open - Replace or close relief valve.
Transmission components are damaged or faulty - Inspect and change faulty parts.
Defective input drive shaft - Change or repair faulty drive shaft.
Hydraulic system is leaking air - Bleed air from hydraulic system.

Drive system is overheated

Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.
Hydraulic fluid filter is plugged - Check, clean, or change as necessary.
Defective relief valve - Service or change relief valve.
Drive pump or hydraulic motor malfunction - Replace or repair faulty component.
Oil cooler is clogged - Cooling fins need to be cleaned.
Drive system overload - Load needs to be reduced.

Drive system is excessively noisy

Oil viscosity is incorrect - Use the specified type of oil.
Hydraulic system is leaking air - Bleed air from hydraulic system.
Damaged drive pump or hydraulic motor - Check and repair if required.
Mechanical components of drive system are damaged or worn - Inspect the parts for defect or damage and repair as required.

Hydraulics Troubleshooting

Hydraulic system overheated

Hydraulic pressure is not adjusted correctly - Adjust it correctly.
Main relief valve failure or improper setting - Adjust the valve or replace if necessary.
Hydraulic fluid is contaminated - The fluid must be changed.
Not enough hydraulic oil in the system - Fill the hydraulic system with oil.
Faulty hydraulic oil pump - Change or repair hydraulic pump if required.

Lift arm can't drop or lift

Lift controls are faulty - Replace or repair.
Hydraulic pump malfunction - Change or repair hydraulic pump if required.
Damaged hydraulic control valve - Replace or repair the valve.
Hydraulic cylinder malfunction - Repair or install a new lift cylinder.
Hydraulic fluid level low - Checking hydraulic fluid level and add if necessary.

Bucket does not function

Bucket tilt controls are damaged - Replace or repair.
Hydraulic pump not working - Repair or install new hydraulic pump.
Damaged hydraulic control valve - Install a new valve or repair it.
Hydraulic bucket cylinder not working - Install a new cylinder or repair it.
Insufficient hydraulic oil - Fill the system to proper hydraulic oil level.

Bucket or lift arm runs slowly

Hydraulic pump is defective - Check the pump performance and replace it if required.
Hydraulic cylinder oil leakage - Correct leakage by changing the seals.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Damaged or incorrect adjusted hydraulic control valve - Set correctly or repair.
Hydraulic system loosing pressure - Adjust pressure correctly.

Bucket or boom is jerky

Air in hydraulic system - Air bleeding is required.
Plugged hydraulic oil filter - Clean or change the filter.
Hydraulic fluid contamination - Hydraulic fluid change required.
Cylinder tube or rod is scored - Change damaged component.

Excessive hydraulic pump noise

Lack of oil or hydraulic leakage - Remedy hydraulic leakage or refill oil as necessary.
Dirty hydraulic filter - Replace or clean the filter.
Suction line is clogged - Suction line needs to be cleaned.
Air trapped in hydraulic pump - Need to bleed air.
Damaged pump components - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery won’t charge

Electrical wire connections are corroded or loose - Tighten or clean connections.
Faulty battery terminal clamps - Terminal clamps should be changed.
Defective battery - Install a new battery.
Belt is worn or loose - Adjust belt tension or install a new belt.

Starter motor cranks slow

Low battery power - Charge the battery.
Battery is draining quickly - Service charging system or change battery.
Disconnected cables or faulty battery terminals - Check cables and clean or change terminals.

Starter doesn't crank

Battery is low or faulty - Recharge or change battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Battery voltage is low - Battery is drained, charge it.
Starter motor is defective - Repair or install a new starter.