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Home / Wheel Loaders / Caterpillar Wheel Loaders / Cat 910M

Caterpillar 910M Troubleshooting

The Cat 910M wheel loader is powered by Caterpillar C4.4 ACERT vertical 4-cylinder turbocharged diesel engine with a rated power of 96 hp (72 kW) at 2200 rpm. The Caterpillar 910M compact wheel loader is equipped with a hydrostatic transmission, power steering system, hydraulic wet disc brakes, and 15.5x25 standard tires. The hydraulic system has a pump with fluid flow rate of 24 gpm (90 lpm). The hydraulic pressure is 3400 psi (235 bar). The loader has a rated operating capacity of 5680 lbs (2575 kg) and tipping load of 11360 lbs (5150 kg). The maximum lift height is 144.7" (3675 mm) to hinge pin, and bucket breakout force is 16180 lbs (7340 kg).

Engine Troubleshooting

Engine hard to start or doesn't start
There is air in the fuel system - Bleed the system.
Fuel filter plugging - Filter maintenance required.
Fuel injection nozzles are dirty or defective - Service or change injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve clearance is not correct - Adjust valve clearance.
Fuel injection pump is not operating properly - Replace or rebuild injection pump.

Diesel starts but then stops
Plugged air cleaner - Clean or replace element.
Fuel filter element clogging - Install new filter element.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Dirty or defective injectors - Test and replace fuel injectors if necessary.
Fuel injection pump malfunction - Repair or install a new fuel pump.

Engine stops running suddenly
Coolant temperature is low - Warm up engine as required.
Fuel filter plugging - Install new filter element.
There is air in the fuel system - Bleed the system.
Fuel injection nozzles are faulty or clogged - Check injection nozzles and replace if required.
Fuel injection pump timing is wrong - Adjust fuel injection pump as required.

Engine stops while idle
Too low idle RPM - Normalize low idle speed.
Defective fuel injection pump - Repair or install a new fuel pump.
Dirty or defective injectors - Replace or clean fuel injectors.
Improper valve clearance - Adjust valve clearance according to specifications.

Engine loses power
Plugged air filter - Clean or change.
Fuel injection nozzles are faulty or clogged - Clean or change injection nozzles.
Incorrect fuel injection pressure - Adjust to proper pressure.
Excessive valve clearance - Correct valve clearance needs to be set.
Low idle speed setting is not correct - Adjust low idle speed.
Fuel lines or hoses are clogged - Clean fuel hoses and lines.
Cylinder head gasket is worn - Replace cylinder head gasket.
Piston rings are leaking or defective - Install new piston rings.

Engine overheated
Not enough coolant - Add coolant fluid to cooling system and also check it for leaks.
Not enough engine oil - Need to add engine oil.
Radiator core is clogged or radiator cap is leaking - Clean radiator or change cap.
Fan belt slipping or worn - Change the fan belt.
Engine overload - Reduce load on the engine.

Oil pressure is low
Insufficient engine oil - Fill up the engine oil.
Oil filter element clogging - Clean or replace engine oil filter element.
Oil grade or viscosity is incorrect - Drain and refill with oil of correct grade and viscosity.
Incorrect crankshaft bearing oil clearance - Change bearings.
Oil pump is damaged - Check and replace if necessary.

Engine knocking or noise
Lack of engine oil - Checking oil level and add if necessary.
Engine is not preheated - Warm up the engine.
Incorrect adjustment of fuel injection pump timing - Set it up as required.
Incorrect low idle speed adjustment - Correct low idle settings.
Clogged or defective injectors - Test and replace fuel injectors if necessary.
Connecting rod is not aligned or worn - Need to replace or align the connecting rod.
Pistons are worn or broken - Replace the pistons as required.

Hydrostatic Transmission Troubleshooting

Excessive HST transmission noise
Fluid is contaminated or fluid level is insufficient - Top up to proper level or change transmission fluid.
Worn or out of adjustment speed control linkage - Adjust or change linkage.
Relief valve malfunction - Change relief valve.
Transmission overload - Reduce loading.
Damaged or worn components of hydrostatic transmission - After disassembling and inspection, change defective components.

Low power
Transmission fluid insufficient - Fill the transmission housing to proper fluid level.
Relief valve is stuck - Replace relief valve.
Bent or unadjusted speed control pedal linkage - Change or adjust linkage.

Transmission oil overheats
Lack of transmission fluid - Need to add transmission fluid.
Dirty transmission fluid filter - Service or replace the transmission fluid filter.
Cooling components are defective or plugged - Inspect all cooling components and service or replace if necessary.
Transmission overloaded - Reduce loading.

Transmission fluid leaking
Seals or gaskets are broken - Change defective seal or gaskets.
Transmission case internal pressure is too high - Change defective parts.
Plugged transmission fluid return tube - Service or replace return tube.

Hydraulics Troubleshooting

Hydraulic system overheating
Incorrect hydraulic pressure setting - Set pressure correctly.
Main relief valve improper adjustment or failure - Set up or change the relief valve.
Contaminated hydraulic oil - The oil must be changed.
Hydraulic fluid level is insufficient - Fill the hydraulic system with oil.
Worn hydraulic oil pump - Repair or install new hydraulic pump.

Lift arm can't drop or lift
Lift controls are damaged - Change or repair.
Hydraulic pump failure - Change or repair hydraulic pump if required.
Hydraulic control valve is faulty - Repair or replace the valve.
Hydraulic cylinder is broken - Repair or change hydraulic cylinder.
Insufficient hydraulic oil - Check and refill the hydraulic oil.

Bucket does not tilt
Faulty bucket tilt controls - Inspect and repair if necessary.
Defective hydraulic pump - Install new pump or repair it.
Hydraulic control valve malfunction - Repair or replace hydraulic valve.
Faulty hydraulic bucket cylinder - Repair or change cylinder.
Low hydraulic fluid level - Fill up the hydraulic fluid.

Boom or bucket is moving slowly
Faulty hydraulic oil pump - Check the pump performance and replace it if required.
Oil leaks from hydraulic cylinder - Replace cylinder piston seals.
Insufficient hydraulic oil - Check and refill the hydraulic oil.
Damaged or incorrect adjusted hydraulic control valve - Set correctly or repair.
Hydraulic system loosing pressure - Adjust pressure correctly.

Jerky operation of the bucket or boom
Air in hydraulic system - Bleed hydraulic system.
Hydraulic oil filter clogging - Replace or clean the filter.
Hydraulic oil is dirty - The oil must be changed.
Cylinder rod or tube is scuffed - Replace failed component.

Hydraulic pump is excessively noisy
Low oil level or hydraulic leaks - Repair hydraulic leaks or add oil as required.
Clogged hydraulic filter - Replace or clean the filter.
Suction line is dirty - Clean suction line as required.
Pump is sucking air - Bleed air.
Pump components are faulty - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery cannot be charged
Electrical cable connections are corroded or loose - Clean or tighten wiring connections.
Faulty battery terminal clamps - Terminal clamps need to be replaced.
Bad cell in battery - Install a new battery.
Belt is defective or loose - Adjust belt tension or change the belt.

Starter motor turns slow
Battery voltage is low - Charge the battery.
Battery drains quickly - Service battery or change it.
Corroded battery terminals or disconnected wires - Connect wires properly or change terminals.

Starter motor won't turn
Battery is drained or worn - Need to charge or replace the battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery output voltage - Battery is drained, charge it.
Starter motor is defective - Starter needs to be changed.

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WHEEL LOADERS SPECIFICATIONS

Wheel Loaders, Skid Steers, and Compact Track Loaders