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Case IH 3394 Troubleshooting
The
Case IH 3394 four-wheel drive row-crop tractor was manufactured from 1985 to
1987. The components of Case IH 3394 powerline system: a 504 cubic inches (8.3
L) Case 504BD 6-cylinder turbocharged liquid-cooled diesel engine with a rated
power of 180 hp (135 kW), and power shift transmission with 24 forward and 3
reverse gears or partial power shift transmission with 12 forward and 3 reverse
gears.
The maximum travel speed (forward/reverse): 20.8 mph (33.5 km/h) and 7.3 mph (11.7 km/h). The closed center hydraulic system includes a piston pump with rated fluid flow of 30 gal/min (113.6 l/min). The lift capacity is 7750 lbs (3515 kg) at 24" (610 mm) behind pin. The Case IH 3394 is equipped with a hydrostatic power steering, differential hydraulic wet disc brakes, 16.9x26 front tyres, and 24.5R32 rear tyres. The wheelbase is 116 inches (2940 mm).
| Diesel Engine Troubleshooting |
| Engine starts hard or won't start |
Air in the fuel lines - Bleed the fuel lines.
Fuel filter plugged - Clean or change the filter.
Clogged or defective injection nozzles - Check injection nozzles and replace if required.
Water in the fuel system - Change fuel and repair fuel system.
The valve clearance is not adjusted - Check and adjust.
Fuel injection pump malfunctioning - Rebuild or install a new injection pump.
| Diesel starts but immediately stops |
Dirty air filter element - Replace air filter element.
Dirty fuel filter - Service or replace the filter.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Damaged or clogged injectors - Test and replace fuel injectors if necessary.
Fuel injection pump is faulty - Replace or repair injection pump.
| Engine stalls while running |
Low coolant temperature - Warm up engine as required.
Fuel filter element clogging - Replace filter element.
Air in fuel system - Bleed fuel system.
Clogged injection nozzle - Clean or replace injection nozzles.
Improper fuel injection timing - Set up as recommended.
| Engine shuts off while idling |
Incorrect low idle setting - Adjustment required.
Fuel injection pump is damaged - Repair or replace injection pump.
Dirty or defective injectors - Replace or clean fuel injectors.
Valve clearance is not correct - Check and adjust.
| Diesel engine is losing power |
Dirty air cleaner - Replace air filter element.
Dirty or faulty injection nozzles - Clean or change injection nozzles.
Fuel injection pressure is incorrect - Check the fuel injection pressure and adjust if necessary.
Valve out of adjustment - Adjust valve clearance according to specifications.
Too low idle RPM - Correct low idle adjustment.
Dirty fuel lines or hoses - Fuel hoses and lines must be clean.
Blown cylinder head gasket - Change cylinder head gasket.
Worn or damaged piston rings - Replace the piston rings as required.
| Engine overheating |
Lack of engine coolant - Add coolant and check the components of cooling system.
Insufficient engine oil - Fill the crankcase with engine oil.
Faulty radiator cap or dirty radiator fins - Clean radiator or install new cap.
Excessive wear of the fan belt - Change the fan belt.
Diesel engine overloaded - Shift to lower gear or reduce the load.
| Oil pressure is insufficient |
Insufficient engine oil - Fill crankcase to proper oil level.
Clogged oil filter element - Clean or replace engine oil filter element.
Oil grade or viscosity is incorrect - Use oil of correct viscosity.
Incorrect oil clearance in crankshaft bearing - Bearings need to be reinstalled.
Oil pump is damaged - Replace as required.
| Engine noises or knocks |
Lack of engine oil - Fill the crankcase with engine oil.
Engine not warmed up - Normalize the temperature by warming up the engine.
Improper setting of fuel injection pump timing - Set the fuel pump timing correctly.
Too low idle RPM - Adjust low idle speed.
Fuel injector fault - Clean fuel injectors or change it.
Connecting rod is not aligned or defective - Align or replace connecting rod.
Worn or scored pistons - Replace the pistons.
| Transmission Troubleshooting |
| Low transmission pressure |
Low fluid level - Add fluid to the transmission housing.
Dirty transmission fluid filter (if fitted) - Replace or service transmission fluid filter.
Relief valve is stuck - Install a new relief valve.
| Excessive transmission noise |
Insufficient transmission fluid - Fill the transmission housing to proper fluid level.
Transmission oil is contaminated - Change the oil.
Worn gears or incorrect backlash - Replace defective gears or set backlash properly.
Bearings are damaged or worn - Bearings need to be changed.
Shift forks are bent or worn out - Replace the shift forks.
Shaft splines are damaged or worn - Install a new shaft.
| Difficulty shifting gears |
Stuck or worn gear shift linkage - Shift linkage need to be replaced.
Damaged or worn gear shift forks - Shift forks need to be replaced.
Gearshift mechanism malfunction - Identify and replace failed parts.
Clutch is faulty or misadjusted - Adjust clutch or replace if required.
| Transmission fluid leakage |
Too much oil in transmission - Drain the excess oil.
Broken seals or gaskets - Install new components.
| Hydraulic System Troubleshooting |
| Insufficient hydraulic fluid pressure |
Low hydraulic fluid level - Fill up the hydraulic fluid.
Clogged hydraulic fluid filter element - Hydraulic filter maintenance required.
Damaged hydraulic pump - Change or repair hydraulic fluid pump.
Incorrect setting hydraulic control valve - Use the correct adjustment.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.
Leaking hydraulic lines - Check the system and repair leaks.
| Hydraulic system is overheated |
Damaged main relief valve - Relief valve must be changed.
Improper hydraulic fluid type - Use the proper type of hydraulic fluid.
Contaminated hydraulic oil - Change hydraulic oil.
Air in the hydraulic system - Air bleeding.
| Hitch not raising or hitch raises slowly |
Excessive hitch loading - Reduce the load is required.
Hydraulic fluid is insufficient - Checking hydraulic fluid level and add if necessary.
Hydraulic oil filter is clogged - Service or replace the hydraulic filter.
Defective hydraulic pump - Repair or replace hydraulic fluid pump.
Faulty main relief valve - Relief valve need to be replaced.
Hydraulic control valve block is defective - Replace or repair the valve.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.
Suction line is broken or disconnected - Connect or replace.
| Hitch not lowering or hitch lowers slowly |
Not adjusted hydraulic control valve - Need to adjust.
Faulty hydraulic cylinder - Repair or install a new hydraulic cylinder.
Three-point hitch is out of adjustment - Adjust as required.
Hitch cross shaft is damaged - Replace the shaft.
| Hitch drop or lift is jerky |
There is air in the hydraulic system - Bleed hydraulic system.
Hydraulic fluid contamination - Change hydraulic fluid.
Hydraulic pump is defective - Change or repair hydraulic fluid pump.
Hydraulic spool valve block is defective - Repair or replace hydraulic valve.
Hydraulic cylinder is defective - Repair or install a new hydraulic cylinder.
| Steering System Troubleshooting |
| Excessive effort to steer |
Worn or incorrectly fitted steering column - Replace the steering column or refit it correctly.
Air in steering system - Bleed the system of air.
Improper toe-in - Adjust toe-in properly.
Uneven tyre pressure - Inflate the tyres properly.
Steering pump not working - Steering pump needs to be repaired or replaced.
Pump flow control valve is worn or stuck - Change or flush control valve.
Steering fluid level is low - Check fluid level and add steering fluid as required.
| Excessive free play of steering wheel |
Steering column coupling or shaft is worn - Replace defective part.
Faulty steering pump - Install a new hydraulic steering pump.
Worn or loose steering linkage joints - Check and replace as required.
| Front wheels wander to left or right |
Front tires are worn unevenly - Install new tires.
Incorrect toe-in - Adjust toe-in properly.
Worn or loose steering linkage joints - Repair or change steering linkage.
Incorrectly adjusted or worn front wheel bearings - Replace the bearings or adjust it properly.
| Electrical Troubleshooting |
| Battery won’t charge |
Wiring connections are loose or corroded - Tighten or service cable connections.
Battery terminal connectors are defective - Terminal connectors need to be changed.
Battery dead cell - Battery change required.
Damaged or loose belt - Change belt or adjust belt tension.
| Starter motor turns slow |
Battery capacity is low - Battery needs to be recharged.
Battery drains quickly - Service charging system or replace battery.
Disconnected wiring or bad battery terminals - Check cables and clean or change terminals.
| Starter motor is not working |
Battery is discharged or worn - Change or recharge battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery voltage - Battery needs to be recharged.
Damaged starter motor - Repair or replace starter.
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