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Bobcat M610 Troubleshooting

The Bobcat M610 skid steer loader is powered by 107.7 cubic inches (1.8 L) Wisconsin VF4D 4-cycle 4-cylinder air-cooled gasoline/LPG engine with a rated power of 30 hp (22 kW) at 2800 rpm. The Bobcat M610 is equipped with a radial-lift loader boom, variable sheave transmission, 60H drive chains, and 7.00x15 standard tires. The hydraulic system has a pump with fluid flow rate of 11 gpm (41.6 lpm). The hydraulic pressure is 1700 psi (117 bar). The skid steer loader has a rated operating capacity of 1000 lbs (454 kg) and tipping load of 2100 lbs (955 kg). The lift height is 108 inches (2745 mm) to hinge pin, and dump height is 86 inches (2185 mm).

Engine Troubleshooting

Engine starts hard or doesn't start
Fuel tank is empty - Fill gasoline up.
Improper fuel grade - Change fuel.
Dirty fuel system - Check and clean.
Spark plug wire connection are damaged - Inspect the spark plug wire connection, replace or repair.
Spark plug is defective - Change spark plug.
Defective ignition - Check ignition and replace faulty components.
Fuel filter is clogged - Fuel filter needs changing.
Fuel lines clogging - Service fuel lines.
Clogged or damaged fuel pump - Inspect fuel pump and change as required.
Carburetor incorrectly set - Set carb correctly.
Bad compression - Check and change damaged parts.

Unstable engine running
Defective ignition - Check ignition and replace faulty components.
Air filter element is clogged - Clean or replace.
Spark plug is damaged - Install new spark plug.
Dirty or damaged fuel pump - Service or replace fuel pump.
Valve clearance is wrong - Adjust valve clearance.
Bad ignition timing - Adjust ignition timing correctly.
Low idle speed set incorrectly - Adjust idle speed.

Engine starts and stalls suddenly
Spark plug is defective - Spark plug need to be replaced.
Carburetor is faulty or dirty - Carburetor needs to be replaced or cleaned.
Ignition coil is not working - Change ignition coil as required.
Valve springs are bad or broken - New valve springs need to be installed.
Valves are stuck - Service the valves.

Engine overheating
Engine oil level is low - Checking oil level and add if necessary.
Engine overload - Reduce load.
Carburetor is running lean - Adjust carburetor properly.
Wrong ignition timing - Adjust ignition timing correctly.
Wrong valve setting - Adjust valves as required.
Radiator fins are clogged or radiator cap is faulty - Clean radiator or install new cap.
Low engine coolant - Refill to the correct level and inspect system for leaks.
Damaged thermostat - Thermostat need to be replaced.
Water pump is defective - Replace water pump.

Engine knocks or noises
Stale or low octane fuel - Change fuel.
Engine overload - Load reducing is recommended.
Lack of engine oil - Check oil level and add oil as required.
Incorrectly adjusted low idle speed - Correct the settings.
Fuel pump is faulty or clogged - Clean or replace fuel pump.
Crankshaft or main bearings are worn out - Crankshaft or bearings need to be replaced.
Incorrect valve clearance - Adjust valve clearance.
Worn cylinder bore or piston rings - Replace faulty components.

Engine power is too low
Improperly adjusted or dirty carburetor - Service or properly adjust carburetor.
Clogged air filter - Replace or clean air filter.
Dirty or damaged fuel pump - Inspect fuel pump and change as required.
Ignition system failure - Check ignition and replace faulty components.
Blown cylinder head gasket - Replace cylinder head gasket.
Burned or stuck valves - Change or clean valves.
Faulty cylinder block components - Change defective components.
Oil filter is blocked - Replace or clean oil filter.

Engine uses too much fuel
Clogged air filter - Service or replace air filter.
Incorrect carburetor main jet adjustment - Adjust main jet as required.
Spark plug is loose or faulty - Change or re-tighten spark plug.
Ignition timing is incorrect - Ignition timing needs to be set properly.
Burned, worn, or stuck valves - Clean or replace valves.
Worn sleeve, piston, or rings - Replace faulty parts.
Excessive valve clearance - Adjust valve clearance according to specifications.
Poor compression - Inspect and replace wear parts.

High engine oil consumption
Worn gaskets or seals - Change worn parts according to specifications.
Worn valve stems and valve guides - Replace the valves.
Stuck or worn piston rings - Replace piston rings.
Worn piston or cylinder liner - Inspect liner and piston, change as necessary.

Engine backfires
Carburetor fuel mixture is too lean - Set the carburetor correctly.
Dirt in the fuel lines - Clean fuel lines.
Incorrect ignition timing - Set the ignition timing correctly.
Wrong valve setting - Adjust valves as required.
Air filter is dirty - Change or clean air filter.

Drive System Troubleshooting

Drive system doesn't work in either direction
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Faulty drive chain - Check drive chain and change defective components.
Worn input drive shaft - Drive shaft need to be replaced or repair.
Stuck relief valve - Service or change relief valve.
Suction line or hydraulic filter is clogged - Replace hydraulic filter or clean suction line.
Worn or damaged foot or hand controls - Change or repair.

Loss of power
Hydraulic oil filter is clogged - Replace or service hydraulic filter.
Relief valve is damaged or open - Replace or close relief valve.
Transmission parts are defective or worn - Check and replace defective components.
Input drive shaft is defective - Replace drive shaft.
Air leaks in hydraulic system - Air bleeding is required.

Overheated drive system
Hydraulic fluid level low - Fill up the hydraulic fluid.
Hydraulic fluid filter is plugged - Change or service hydraulic filter.
Relief valve defective or worn - Change or repair defective relief valve.
Drive system overload - Reduce drive system load.

Drive system is excessively noisy
Oil viscosity is too heavy - Use correct oil viscosity.
Air trapped in hydraulic system - Bleed air from system.
Transmission parts are defective or worn - Replace or repair faulty component.
Worn or damaged mechanical components of drive system - Check the components for worn or defect and replace if necessary.

Hydraulics Troubleshooting

Hydraulic system overheated
Hydraulic pressure is incorrect - Correct setting is required.
Main relief valve improper adjustment or failure - Set up or change the relief valve.
Contaminated hydraulic oil - Hydraulic oil change required.
Hydraulic oil level is insufficient - Check oil level and add hydraulic oil as required.
Hydraulic pump is worn - Repair or replace pump if necessary.

Lift arm fails to drop or lift
Lift controls are defective - Inspect and repair if necessary.
Damaged hydraulic oil pump - Replace or repair pump if necessary.
Faulty hydraulic control valve - Repair or change hydraulic valve.
Hydraulic cylinder malfunction - Replace or repair boom cylinder.
Low hydraulic oil level - Checking hydraulic oil level and add if necessary.

Bucket does not tilt
Damaged bucket controls - Change or repair.
Hydraulic pump failure - Change or repair hydraulic pump if required.
Hydraulic control valve is defective - Install a new hydraulic valve or repair it.
Defective bucket cylinder - Install a new cylinder or repair it.
Hydraulic fluid is insufficient - Fill the system to proper hydraulic fluid level.

Boom or bucket functions slowly
Defective hydraulic pump - Test the pump performance and change pump if required.
Leaking hydraulic cylinder - Correct leakage by changing the seals.
Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.
Hydraulic control valve is unadjusted or worn - Repair or set properly.
Hydraulic pressure is low - Correct setting is required.

Jerky operation of the bucket or boom
Hydraulic system is leaking air - Need to bleed air.
Dirty hydraulic oil filter - Clean or install new filter.
Dirty hydraulic fluid - Fill up with fresh hydraulic fluid.
Scored cylinder tube or rod - Change damaged component.

Hydraulic pump is excessively noisy
Not enough oil or hydraulic system leaking - Remedy hydraulic leakage or refill oil as necessary.
Dirty hydraulic filter - Service or replace hydraulic filter.
Dirty suction line - Need to service the suction line.
Pump sucks air - Bleed air.
Damaged pump components - Replace or rebuild the pump.

Electrical Troubleshooting

Battery won’t charge
Loose or corroded cable connections - Tighten or clean connections.
Faulty battery terminal clamps - Terminal clamps need to be replaced.
Bad cell in battery - Replace the battery.
Loose or defective belt - Need to adjust belt tension or replace belt.

Starter turning slow
Battery power is low - Battery is drained, recharge it.
Battery is draining quickly - Service or change the battery.
Disconnected wiring or bad battery terminals - Connect wires correctly or change terminals.

Starter doesn't crank
Battery is drained or defective - Battery needs to be recharged or replaced.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery voltage is low - Battery is drained, recharge it.
Damaged starter motor - Starter needs to be replaced.