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John Deere 4475 Troubleshooting
The
John Deere 4475 skid steer loader is powered by 91.3 cu.in (1.5L) Yanmar 3TNE84D
3-cylinder liquid-cooled diesel engine with a rated power of 31 hp (23 kW) at
3000 rpm. The John Deere 4475 is equipped with a vertical-lift loader boom,
one-speed hydrostatic transmission, heavy-duty drive chains, and 10.00x16.5
standard tires. The hydraulic system has a pump with fluid flow rate of 11 gpm
(42 lpm). The hydraulic pressure is 2750 psi (190 bar). The skid steer loader
has a rated operating capacity of 1360 lbs (617 kg) and tipping load of 2750 lbs
(1250 kg). The lift height is 111 inches (2820 mm) to hinge pin, and dump height
is 87.9 inches (2235 mm).
| Engine Troubleshooting |
Engine starts up hard or doesn't start
Air in fuel tank - Bleed fuel tank.
Fuel filter plugged - Replace filter element.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Water in the fuel system - Change fuel and repair fuel system.
Incorrect valve clearance - Adjust valve clearance according to specifications.
Fuel injection pump is faulty - Change pump or rebuild it.
Engine starts and immediately shuts off
Clogged air filter - Replace or clean air filter element.
Fuel filter element clogging - Clean or change the filter.
Fuel injection pump has loose connections - Tighten the connections.
Fuel injectors are dirty or defective - Clean fuel injectors or change it.
Fuel injection pump is damaged - Repair or install a new fuel pump.
Engine stalls after running
Engine is not warmed up to the required temperature - Warm up the engine.
Dirty fuel filter - Change filter element.
Air in fuel tank - Bleed fuel tank.
Clogged or defective injection nozzles - If necessary, replace with a new nozzle.
Wrong setting of fuel injection pump timing - Adjust fuel injection pump as required.
Engine stalling at idle
Incorrectly set low idle speed - Adjust low idling as recommended.
Fuel injection pump is faulty - Replacement or repair required.
Damaged or clogged injectors - Clean fuel injectors or change it.
Improper valve clearance - Check and adjust as required.
Engine power loss
Clogged air cleaner - Service or replace air cleaner.
Faulty or dirty injection nozzles - Replace injection nozzles.
Insufficient fuel injection pressure - Correct the pressure settings.
Incorrect valve clearance - Adjustment procedure required.
Incorrect low idle setting - Normalize low idle speed.
Restricted fuel lines or hoses - Clean fuel system hoses and lines.
Cylinder-head gasket is broken - Replace cylinder head gasket.
Piston rings are damaged or leaking - Change piston rings.
Engine overheated
Engine coolant is insufficient - Fill radiator to proper level and check components for faults.
Lack of engine oil - Need to add engine oil.
Radiator core is dirty or radiator cap is damaged - Clean radiator or install new cap.
Fan belt is worn or faulty - Belt change is required.
Diesel engine is overloaded - Load reducing is recommended.
Low oil pressure
Oil level is insufficient - Fill crankcase to proper oil level.
Oil filter element is dirty - Service or change engine oil filter element.
Wrong oil viscosity - Drain and refill with oil of correct grade and viscosity.
Incorrect crankshaft bearing oil clearance - Change bearings.
Oil pump failure - Check and replace if necessary.
Engine noise or knocking
Lack of engine oil - Check oil level and add oil as required.
Engine is not preheated - Warm up to required temperature.
Timing of fuel injection pump is incorrect - Adjust as recommended.
Incorrectly adjusted low idle speed - Normalize low idle speed.
Defective fuel injectors - Clean or replace fuel injectors.
Connecting rod is defective or not aligned - Alignment procedure or replacement is required.
Worn or scored pistons - Replace the pistons.
| Drive System Troubleshooting |
Machine will not move in either direction or one direction
Hydraulic oil is insufficient - Check and refill the hydraulic oil.
Drive chain malfunction - Check drive chain and change defective parts.
Relief valve is stuck - Change or repair defective relief valve.
Hydraulic filter or suction line is plugged - Change hydraulic filter or service suction line.
Defective hand or foot controls - Repair or replace.
Drive motor or pump is worn - Check and repair if required.
Low power
Dirty hydraulic oil filter - Replace hydraulic filter.
Open or faulty relief valve - Replace or close relief valve.
Transmission parts are worn or defective - Check and replace faulty components.
Input drive shaft failure - Replace drive shaft.
Hydraulic system is leaking air - Bleed hydraulic system.
Drive system is overheated
Insufficient hydraulic fluid - Check and refill the hydraulic fluid.
Hydraulic fluid filter is clogged - Replace or service hydraulic filter.
Relief valve malfunction - Relief valve need to be replaced or repair.
Drive pump or hydraulic motor malfunction - Repair or replace faulty component.
Plugged hydraulic oil cooler - Cooling fins need to be cleaned.
Drive system overloaded continuously - Reduce loading.
Drive system is noisy
Improper oil viscosity - Use oil of proper viscosity.
Hydraulic system is leaking air - Bleed air from system.
Hydraulic motor or drive pump is worn - Replace or repair faulty component.
Worn or damaged mechanical components of drive system - Inspect drive system and replace faulty components.
| Hydraulics Troubleshooting |
Hydraulic system overheats
Hydraulic pressure is not correct - Set pressure correctly.
Unadjusted or defective main relief valve - Set up or change the relief valve.
Dirty hydraulic oil - Fill up with fresh hydraulic oil.
Not enough hydraulic fluid in the system - Need to add fluid.
Hydraulic pump is worn - Change or repair hydraulic pump if required.
Lift arm does not lower or raise
Damaged lift controls - Change or repair.
Hydraulic pump malfunction - Repair or install new hydraulic pump.
Hydraulic control valve is faulty - Install a new valve or repair it.
Hydraulic cylinder failure - Replace or repair boom cylinder.
Hydraulic oil is insufficient - Need to add oil.
Bucket does not function
Defective bucket controls - Inspect and repair if necessary.
Hydraulic pump malfunction - Change or repair hydraulic pump if required.
Hydraulic control valve is defective - Repair or change the valve.
Bucket cylinder is faulty - Replace or repair cylinder.
Low hydraulic oil level - Check and refill the hydraulic oil.
Slow bucket or lift arm operation
Hydraulic pump is worn - Test pump flow rate and replace pump if required.
Oil leaks from hydraulic cylinder - Correct leakage by changing the seals.
Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.
Hydraulic control valve is not set properly or defective - Adjust properly or repair.
Hydraulic pressure loss - Correct adjustment is required.
Lift arm or bucket is moving jerkily
Air in the hydraulic system - Bleed air from system.
Hydraulic oil filter clogging - Clean or install new filter.
Hydraulic fluid is dirty - Hydraulic fluid change required.
Cylinder rod or tube is scuffed - Replace worn component.
Excessive hydraulic pump noise
Leaking hydraulic system or insufficient oil level - Remedy hydraulic leakage or refill oil as necessary.
Hydraulic filter is dirty - Service or replace hydraulic filter.
Suction line is clogged - Need to service the suction line.
Pump is sucking air - Bleed air from hydraulics.
Worn pump components - Replace or rebuild the pump.
| Electrical Troubleshooting |
Battery won’t charge
Corroded or loose wire connections - Tighten or service connections.
Battery terminal connectors are faulty - Terminal connectors should be replaced.
Worn-out battery - Use a new battery.
Defective or loose belt - Belt needs to be adjusted or replaced.
Starter cranks slowly
Low battery output voltage - Charge the battery.
Battery is not holding charge - Service charging system or install new battery.
Faulty battery terminals or disconnected cables - Check cables and clean or change terminals.
Starter does not work
Battery is discharged or worn - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output - Low battery charging, charge as required.
Starter motor is faulty - Starter should be changed.
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| SKID STEER LOADERS SPECIFICATIONS |