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John Deere 250 Troubleshooting
The
John Deere 250 Series 2 skid steer loader driveline system components: a 179
cu.in (2.9L) John Deere 3029T 3-cylinder direct injection turbocharged diesel
engine with a rated power of 61 hp (45.5 kW), and single-speed hydrostatic
transmission. The hydraulic system has a pump with a rated capacity of 17.6
gal/min (66.5 l/min) or 30.1 gal/min (113.9 l/min). The John Deere 250 is
equipped with vertical-lift loader boom, 80HD drive chains, and 12.00x16.5
tires. The loader has a boom breakout force of 3100 lbs (1407 kg) and bucket
breakout force of 5500 lbs (2497 kg). The rated operating capacity is 1750 lbs
(795 kg), and tipping load is 3600 lbs (1635 kg).
| Engine Troubleshooting |
Engine starts hard or will not start
Air in the fuel system - Air bleeding.
Fuel filter plugged - Install new filter element.
Burnt or clogged injection nozzle - Clean or replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
The valve clearance is incorrect - Have it adjusted.
Fuel injection pump is defective - Change or repair the pump.
Engine starts but then stalls
Clogged air filter - Install new air filter element.
Clogged fuel filter - Change or clean the filter element.
Poor fuel injection pump tightness - Look for any leaks of fuel pump, tighten it fast.
Defective or clogged fuel injectors - Change or clean fuel injectors.
Faulty fuel injection pump - Change or repair the pump.
Engine stalls during operation
Coolant temperature is low - Warm up engine as required.
Fuel filter plugging - Replace filter element.
There is air in the fuel system - Bleed the system.
Faulty fuel injection nozzles - Check injection nozzles and replace if required.
Improper fuel injection timing - Check the fuel injection pump timing adjustment.
Engine stalls while idle
Low idle speed setting is not correct - Normalize low idle speed.
Fuel injection pump is not operating properly - Rebuild or install a new injection pump.
Fuel injector fault - Replace fuel injectors.
Excessive valve clearance - Adjust to proper valve clearance.
Engine loses power
Dirty air cleaner - Clean or change cleaner.
Clogged or burnt injection nozzle - Check injection nozzles and replace if required.
Fuel injection pressure is incorrect - Adjust to correct pressure.
Improper valve clearance - Correct valve clearance needs to be set.
Incorrectly set low idle speed - Test and adjust.
Fuel lines or hoses clogging - Clean fuel system lines and hoses.
Leaking cylinder head gasket - Change cylinder head gasket.
Piston rings are broken or leaking - Piston rings replacement required.
Engine overheated
Engine has a lack of coolant - Add coolant and check the components of cooling system.
Low engine oil level - Fill up the engine oil.
Dirty radiator core or faulty radiator cap - Replace cap or clean radiator.
Broken or loose fan belt - Change as required.
Engine overloaded - Reduce load on the engine.
Oil pressure too low
Insufficient engine oil - Add oil to the engine crankcase.
Engine oil filter is plugged - Service or change engine oil filter element.
Improper type of engine oil - Fill up with the correct oil viscosity.
Incorrect crankshaft bearing oil clearance - Bearing needs to be changed.
Oil pump is damaged - Check and replace if necessary.
Engine noise or knocking
Engine oil insufficient - Fill the crankcase with engine oil.
Engine has not warmed up to the recommended temperature - Warm up the engine.
Fuel injection pump timing is wrong - Use the correct fuel injection pump timing adjustment.
Too low idle RPM - Correct low idle settings.
Damaged or clogged injectors - Replace fuel injectors.
Faulty or misaligned connecting rod - Need to change or align the connecting rod.
Worn or scored pistons - Replace the pistons.
| Drive System Troubleshooting |
Machine will not move forward or backward
Insufficient hydraulic oil - Fill the system to proper hydraulic oil level.
Drive chain fault - Inspect drive chain and replace faulty components.
Relief valve defective or worn - Repair or change.
Clogged suction line or hydraulic filter - Check, clean, or change if necessary.
Foot or hand controls are damaged - Inspect and repair if necessary.
Defective drive pump or motor - Repair or replace faulty component.
Low power
Hydraulic oil filter is dirty - Change or clean hydraulic filter.
Worn or open relief valve - Close or change relief valve.
Faulty or damaged transmission components - Check and change defective components.
Input drive shaft malfunction - Repair or replace drive shaft.
Hydraulic system is leaking air - Bleed air from system.
Drive system is overheated
Insufficient hydraulic fluid - Add fluid as required.
Plugged hydraulic fluid filter - Check, clean, or replace as required.
Faulty relief valve - Rebuild or install a new relief valve.
Drive pump or hydraulic motor malfunction - Inspect and change as required.
Plugged hydraulic oil cooler - Cooling fins should be cleaned.
Drive system overload - Load should be reduced.
Drive system makes excessive noise
Oil viscosity is too heavy - Use correct oil viscosity.
Hydraulic system is leaking air - Air bleeding is required.
Drive pump or hydraulic motor malfunction - Inspect and change as required.
Worn or damaged mechanical components of drive system - Check the components for worn or defect and replace if necessary.
| Hydraulics Troubleshooting |
Hydraulic system has overheating
Incorrect hydraulic pressure setting - Adjust it correctly.
Defective or misadjusted main relief valve - Adjust relief valve or change if required.
Contaminated hydraulic fluid - Fill up with fresh hydraulic fluid.
Not enough hydraulic oil in the system - Add oil to the hydraulic system.
Hydraulic pump is worn - Repair or install new hydraulic pump.
Boom cannot be lowered or raised
Lift controls malfunction - Check and repair as required.
Hydraulic pump is broken - Repair or replace pump if necessary.
Defective hydraulic control valve - Change or repair hydraulic valve.
Hydraulic cylinder not working - Change or repair lift cylinder.
Low hydraulic oil level - Need to add oil.
Bucket can't tilt
Bucket controls are faulty - Inspect and repair if necessary.
Defective hydraulic pump - Repair or install new hydraulic pump.
Hydraulic control valve malfunction - Replace or repair the valve.
Broken bucket cylinder - Install a new cylinder or repair it.
Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.
Boom or bucket is moving slowly
Worn hydraulic oil pump - Check pump performance and change it if necessary.
Hydraulic cylinder oil leakage - Cylinder seals need to be replaced.
Hydraulic oil level low - Need to add oil.
Hydraulic control valve is not set properly or defective - Adjust correctly or repair.
Hydraulic pressure is low - Hydraulic pressure must be set correctly.
Bucket or boom is working jerkily
There is air in the hydraulic system - Need to bleed air.
Hydraulic oil filter clogging - Replace or clean the filter.
Contaminated hydraulic oil - Change hydraulic oil.
Cylinder rod or tube is scratched - Replace damaged component.
Hydraulic pump makes excessive noise
Lack of oil or hydraulic leakage - Remedy hydraulic leakage or refill oil as necessary.
Hydraulic filter is clogged - Service or replace hydraulic filter.
Suction line is dirty - Suction line must be serviced.
Air in hydraulic pump - Need to bleed air.
Worn pump components - Rebuild or change hydraulic pump.
| Electrical Troubleshooting |
Battery won’t charge
Corroded or loose cable connections - Tighten or clean electrical wiring connections.
Battery terminal clamps are defective - Replace terminal clamps.
Worn-out battery - Change the battery.
Damaged or loose belt - Belt needs to be adjusted or replaced.
Starter motor turns slow
Battery voltage is low - Battery needs to be recharged.
Battery will not hold charge - Service charging system or replace battery.
Terminals are faulty or battery cables are disconnected - Connect wiring properly or install new terminals.
Starter motor is not working
Battery is low or faulty - Charge or replace the battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output - Battery is drained, recharge it.
Starter motor failing - Repair or replace starter.
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| SKID STEER LOADERS SPECIFICATIONS |