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Home / Wheel Loaders / Caterpillar Wheel Loaders / Cat 910K

Caterpillar 910K Troubleshooting

The Caterpillar 910K compact wheel loader driveline system components: a 186.3 cu.in (3.1L) Cat C4.4 four-cylinder turbocharged diesel engine with a rated power of 96 hp (72 kW), and hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 24 gal/min (90 l/min). The system relief pressure is 3400 psi (235 bar). The Cat 910K is equipped with a power steering system, hydraulic wet disc brakes, and 15.5x25 tires. The wheel loader has a maximum lift height to hinge pin of 144.7" (3675 mm) and boom breakout force of 16155 lbs (7330 kg). The rated operating capacity is 4980 lbs (2260 kg), and tipping load is 9960 lbs (4520 kg).

Engine Troubleshooting

Engine difficult to start or won't start
Air in the fuel lines - Bleed the fuel lines.
Fuel filter element is dirty - Install new filter element.
Clogged or burnt injection nozzle - Clean or change injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
The valve clearance is not adjusted - Correct valve clearance.
Fuel injection pump is not operating properly - Rebuild or change fuel pump.

Diesel starts but stalls immediately
Air cleaner is clogged - Install new air cleaner element.
Fuel filter plugging - Change filter element.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Fuel injectors are dirty or defective - Change or clean fuel injectors.
Fuel injection pump is not operating properly - Repair or change injection pump.

Engine stops unexpectedly during operation
Engine not warmed up - Warm up engine as required.
Dirty fuel filter - Replace filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Dirty or damaged injection nozzles - Install a new kit of correctly balanced nozzles.
Improper fuel injection timing - Set the fuel pump timing correctly.

Engine stalling at idle
Low idle speed setting is incorrect - Adjust as required.
Fuel injection pump is defective - Install a new pump or rebuild.
Fuel injectors are dirty or defective - Clean fuel injectors or change it.
Valve clearance is not correct - Adjust valve clearance.

Diesel engine loses power
Air filter is clogged - Install new air filter element.
Dirty or damaged injection nozzles - Clean or replace injection nozzles.
Uneven fuel injection pressure - Adjust pressure to proper level.
Valve clearance is not correct - Have it adjusted.
Wrong adjustment of low idle speed - Adjustment required.
Restricted fuel lines or hoses - Service fuel hoses and lines.
Damaged cylinder-head gasket - Install a new gasket.
Piston rings are worn or damaged - Replace piston rings.

Engine overheated
Insufficient coolant fluid - The cooling system needs to be refilled and checked for faults.
Insufficient engine oil - Checking oil level and add if necessary.
Dirty radiator core or faulty radiator cap - Clean radiator or change cap.
Fan belt is broken or worn - Replace as required.
Engine is overloaded - Reduce load on the engine.

Low oil pressure
Not enough oil in the engine - Add oil as required.
Oil filter element clogging - Service or replace engine oil filter.
Oil grade or viscosity is wrong - Drain and refill with oil of correct grade and viscosity.
Crankshaft bearing has incorrect oil clearance - Bearing needs to be changed.
Worn oil pump - Check and replace if necessary.

Engine knocking sound or abnormal noise
Engine oil insufficient - Fill up the engine oil.
Low coolant temperature - Warm up the engine.
Improper setting of fuel injection pump timing - Adjust the pump as required.
Low idle speed setting is incorrect - Adjustment required.
Defective fuel injectors - Replace or clean fuel injectors.
Faulty or misaligned connecting rod - Align or replace connecting rod.
Pistons are worn or scored - Replace the pistons as required.

Hydrostatic Transmission Troubleshooting

Hydrostatic transmission makes noise
Dirty transmission fluid or insufficient fluid level - Add fluid to the correct level or fill the transmission with fresh fluid.
Worn or out of adjustment speed control linkage - Adjust or repair linkage.
Relief valve malfunction - Replace relief valve as required.
Transmission overload - The load should be reduced.
Transmission parts are worm or defective - Change or repair defective parts.

Power is insufficient
Transmission oil insufficient - Fill up the transmission oil.
Relief valve is damaged - Change the valve.
Bent or unadjusted speed control pedal linkage - Replace or adjust linkage.

Transmission fluid is too hot
Transmission fluid level is low - Fill the transmission housing to proper fluid level.
Transmission fluid filter element clogging - Service or change transmission fluid filter.
Plugged or defective cooling components - Check all cooling components and change or clean if required.
Excessive loading - The load should be reduced.

Transmission oil leaking
Damaged seals or gaskets - Gaskets or seal need to be replaced.
High internal transmission housing pressure - Change defective parts.
Clogged transmission fluid return pipe - Clean or change return pipe.

Hydraulics Troubleshooting

Hydraulic system overheats
Hydraulic pressure is incorrect - Adjust pressure as required.
Unadjusted or defective main relief valve - Adjust or replace the relief valve.
Contaminated hydraulic oil - Change hydraulic oil.
Hydraulic fluid level is insufficient - Fill the hydraulic system with oil.
Hydraulic pump is defective - Replace or repair pump if necessary.

Boom cannot be lowered or raised
Lift controls malfunction - Inspect and repair if necessary.
Hydraulic pump malfunction - Replace or repair pump if necessary.
Hydraulic control valve failure - Repair or change hydraulic valve.
Damaged hydraulic cylinder - Repair or replace hydraulic cylinder.
Low hydraulic oil level - Need to add oil.

Bucket fails to tilt
Bucket tilt controls are defective - Change or repair.
Hydraulic pump not working - Repair or replace pump if necessary.
Hydraulic control valve malfunction - Replace or repair the valve.
Broken bucket cylinder - Replace or repair cylinder.
Low hydraulic oil level - Check and refill the hydraulic oil.

Boom or bucket functions slowly
Worn hydraulic oil pump - Test the pump performance and change pump if required.
Hydraulic cylinder oil leakage - Change cylinder piston seals.
Hydraulic oil level low - Need to add oil.
Defective or not adjusted hydraulic control valve - Set correctly or repair.
Low hydraulic pressure - Correct adjustment is required.

Bucket or boom is moving jerkily
There is air in the hydraulic system - Bleed hydraulic system.
Plugged hydraulic oil filter - Service or change the hydraulic filter.
Hydraulic oil is contaminated - Change hydraulic oil.
Scratched cylinder rod or tube - Change damaged component.

Hydraulic pump is excessively noisy
Not enough oil or hydraulic system leaking - Top up hydraulic oil or remedy leakage in system.
Hydraulic filter clogging - Service or replace hydraulic filter.
Dirty suction line - Need to service the suction line.
Air trapped in hydraulic pump - Air bleeding is required.
Pump components are worn out - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery cannot be charged
Electrical cable connections are loose or corroded - Tighten or service connections.
Defective battery terminal connectors - Change terminal connectors.
Battery is worn - Install a new battery.
Belt is worn or loose - Adjust belt tension or change the belt.

Starter turning slow
Low battery output voltage - Charge the battery.
Battery is draining quickly - Service charging system or install new battery.
Bad terminals or disconnected battery cables - Connect cables correctly or replace terminals.

Starter motor won't turn
Battery is discharged or defective - Replace or charge as required.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Low battery power - Battery is drained, recharge it.
Faulty starter motor - Change or repair starter.

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WHEEL LOADERS SPECIFICATIONS

Wheel Loaders, Skid Steers, and Compact Track Loaders