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John Deere 240 Troubleshooting
The
John Deere 240 Series 2 skid steer loader is powered by 179 cu.in (2.9L) John
Deere 3029D 3-cylinder liquid-cooled diesel engine with a rated power of 51 hp
(38 kW) at 2400 rpm. The John Deere 240 is equipped with a vertical-lift loader
boom, single-speed hydrostatic transmission, 80HD drive chains, and 10.00x16.5
standard tires. The hydraulic system has a pump with fluid flow rate of 14.6 gpm
(55.3 lpm) or 25.4 gpm (96.1 lpm). The hydraulic pressure is 3100 psi (214 bar).
The skid steer loader has a rated operating capacity of 1500 lbs (680 kg) and
tipping load of 3400 lbs (1540 kg). The lift height is 114" (2895 mm) to hinge
pin, and dump height is 88.8" (2255 mm).
| Engine Troubleshooting |
Engine starts hard or won't start
Air in the fuel system - Air bleeding.
Clogged fuel filter - Clean or replace the filter.
Defective or clogged injection nozzle - Check and replace nozzles if required.
Dirt or water in fuel system - Drain water or flush dirt from the system.
The valve clearance is not adjusted - Have it adjusted.
Fuel injection pump is broken - Replace or repair injection pump.
Diesel starts and stops
Dirty air cleaner - Clean or replace element.
Fuel filter element is clogged - Change the filter element.
Fuel injection pump is leaking - Repair any leaks.
Dirty or defective injectors - Inspect fuel injectors and change as required.
Fuel injection pump malfunctioning - Install a new fuel pump or repair.
Engine stalls while running
Coolant temperature is low - Normalize the temperature by warming up the engine.
Fuel filter element clogging - Clean or replace the filter.
Air in the fuel system - Air bleeding.
Fuel injection nozzles are damaged or dirty - Check injection nozzles and replace if required.
Incorrect adjustment of fuel injection pump timing - Adjust the pump as required.
Engine stalls at low idle speed
Incorrectly set low idle speed - Correct the settings.
Fuel injection pump malfunctioning - Repair or change injection pump.
Damaged or clogged injectors - Inspect fuel injectors and change as required.
The valve clearance is incorrect - Check and adjust.
Engine power is too low
Plugged air cleaner - Service or replace air cleaner.
Faulty fuel injection nozzles - If necessary, replace with a new nozzle.
Improper fuel injection pressure - Adjust to proper pressure.
Improper valve clearance - Adjustment procedure required.
Low idle speed adjustment is incorrect - Correct low idle adjustment.
Clogged fuel hoses or lines - Fuel hoses and lines must be clean.
Worn cylinder head gasket - Install new cylinder head gasket.
Piston rings are leaking or defective - Change piston rings.
Engine is overheated
Low engine coolant - Top up coolant fluid and check system for leaks.
Lack of engine oil - Need to add engine oil.
Defective radiator cap or clogged radiator fins - Replace cap or clean radiator.
Excessive wear of the fan belt - Replace as required.
Diesel engine is overloaded - Reduce engine load.
Oil pressure is low
Lack of oil - Need to add oil.
Plugged engine oil filter - Clean or replace engine oil filter element.
Incorrect oil viscosity - Drain crankcase and refill with correct oil.
Crankshaft bearing oil clearance is excessive - Bearing needs to be changed.
Oil pump malfunction - Replace as required.
Engine noise or knocking
Engine oil level is insufficient - Need to add engine oil.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Fuel injection pump timing is wrong - Adjust as recommended.
Incorrect low idle speed adjustment - Correct low idle adjustment.
Dirty or defective injectors - Change or clean fuel injectors.
Connecting rod misalignment or failure - Connecting rod needs to be replaced or aligned.
Worn or broken pistons - Replace the pistons.
| Drive System Troubleshooting |
Drive system won't operate in either direction
Hydraulic fluid level low - Add fluid as required.
Worn drive chain - Inspect drive chain and replace defective components.
Relief valve is stuck - Repair or replace relief valve.
Hydraulic filter or suction line is dirty - Change hydraulic filter or service suction line.
Faulty hand or foot controls - Change or repair.
Drive motor or pump is worn - Replace or repair faulty component.
Low power
Clogged hydraulic oil filter - Change or clean hydraulic filter.
Damaged or opened relief valve - Replace or close relief valve.
Worn or faulty transmission components - Inspect and change faulty parts.
Input drive shaft failure - Replace drive shaft.
Air trapped in hydraulic system - Bleed hydraulic system.
Overheated drive system
Hydraulic oil level is low - Fill the system to proper hydraulic oil level.
Dirty hydraulic fluid filter - Replace or service hydraulic filter.
Relief valve worn or defective - Repair or install a new relief valve.
Worn hydraulic motor or drive pump - Inspect and replace as necessary.
Plugged hydraulic oil cooler - Clean the cooling fins.
Drive system overloaded continuously - Reduce drive system load.
Drive system is noisy
Wrong oil viscosity - Drain and refill with correct oil.
Air in the hydraulic system - Need to bleed air.
Damaged drive pump or hydraulic motor - Replace or repair faulty component.
Mechanical parts of drive system are worn or damaged - Inspect the parts for worn or defect and repair as needed.
| Hydraulics Troubleshooting |
Hydraulic system overheats
Hydraulic pressure incorrectly adjusted - Adjust pressure correctly.
Unadjusted or defective main relief valve - Adjust or change relief valve.
Hydraulic oil is contaminated - Hydraulic oil change required.
Not enough hydraulic fluid in the system - Check and refill the hydraulic fluid.
Faulty hydraulic oil pump - Repair or change pump if required.
Boom can't lift or drop
Defective lift controls - Replace or repair.
Hydraulic pump not working - Install new pump or repair it.
Faulty hydraulic control valve - Repair or change hydraulic valve.
Faulty hydraulic cylinder - Repair or install a new lift cylinder.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.
Bucket does not tilt
Faulty bucket tilt controls - Check and repair as required.
Damaged hydraulic oil pump - Replace or repair pump if necessary.
Damaged hydraulic control valve - Repair or replace hydraulic valve.
Faulty hydraulic bucket cylinder - Repair or install a new cylinder.
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Slow boom or bucket operation
Worn hydraulic oil pump - Test pump performance and replace pump if necessary.
Hydraulic cylinder leaking - Correct leakage by changing the seals.
Hydraulic oil is insufficient - Need to add oil.
Faulty or incorrect setting hydraulic control valve - Set properly or repair.
Hydraulic pressure loss - Hydraulic pressure must be set correctly.
Bucket or boom movements are jerky
Air in the hydraulic system - Air bleeding is required.
Dirty hydraulic oil filter - Service or change the hydraulic filter.
Hydraulic oil contamination - Hydraulic oil change required.
Cylinder rod or tube is scratched - Replace damaged component.
Hydraulic pump is noisy
Hydraulic leaks or lack of oil - Correct hydraulic leaks or top up oil as needed.
Hydraulic filter clogging - Service or change hydraulic filter.
Plugged suction line - Clean suction line as required.
Air enters the pump - Remove air from hydraulics.
Pump components are faulty - Change or rebuild pump.
| Electrical Troubleshooting |
Battery will not charge
Electrical wire connections are corroded or loose - Tighten or service cable connections.
Defective battery terminal clamps - Replace terminal clamps.
Battery bad cell - Replace the battery.
Belt is damaged or loose - Adjust belt tension or replace belt.
Starter turns slowly
Battery voltage is low - Battery needs to be recharged.
Battery discharges quickly - Service or change the battery.
Disconnected wiring or bad battery terminals - Check battery wires and service or replace terminals.
Starter motor won't turn
Battery is discharged or worn - Recharge or change battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery capacity - Low battery charging, charge as required.
Damaged starter motor - Repair or install a new starter.
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| SKID STEER LOADERS SPECIFICATIONS |