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Case IH 956 XL Troubleshooting

The Case IH 956 XL is a 2WD or 4WD utility tractor. This model was manufactured between 1985 and 1992. The Case IH 956XL tractor is powered by 358 cu.in (5.9 L) International Harvester D358 4-cycle 4-cylinder direct injection liquid-cooled diesel engine with a rated power of 95 hp (70.8 kW) at 2200 rpm.

The Case IH 956 XL is fitted with IH Total-synchron transmission with 16 forward and 8 reverse gears. The maximum forward speed - 17.4 mph (28 km/h), maximum reverse speed - 6.6 mph (10.6 km/h). The open center hydraulic system has a gear pump with a rated capacity of 11.4 gal/min (43 l/min).

The hydraulic system pressure is 175 bar (2535 psi). The 2WD models are equipped with 7.50x20 front tires and 16.9R38 rear tires. The 12.4R28 front tires and 16.9R38 rear tires are used for 4WD tractors. The wheelbase is 103.5" (2620 mm) for 2-wheel drive tractors and 102" (2590 mm) for 4-wheel drive tractors.

Engine Troubleshooting
Engine difficult to start or won't start

Air trapped in fuel system - Bleed air.
Fuel filter element clogging - Service the filter.
Damaged or dirty injection nozzles - Service or change injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Valve clearance is out of adjustment - Correct valve clearance.
Faulty fuel injection pump - Repair or install a new fuel pump.

Diesel starts and then shuts off

Clogged air cleaner - Service or replace the air filter.
Fuel filter element is clogged - Clean the filter element.
Fuel injection pump has loose connections - Tighten the connections.
Defective fuel injectors - Replace or clean fuel injectors.
Fuel injection pump is broken - Rebuild or install a new injection pump.

Diesel shuts off while driving

Low coolant temperature - Normalize the temperature by warming up the engine.
Fuel filter plugging - Filter maintenance required.
Air in the fuel pipes - Bleed the fuel pipes.
Clogged or burnt injection nozzle - Inspect nozzles and replace if necessary.
Timing of fuel injection pump is incorrect - Adjust as recommended.

Engine shuts off while idling

Too low idle RPM - Need to adjust idle speed.
Fuel injection pump is faulty - Change or repair the pump.
Clogged or defective injectors - Inspect fuel injectors and change as required.
The valve clearance is incorrect - Correct valve clearance needs to be set.

Engine loses power

Plugged air cleaner - Air filter maintenance required.
Dirty or faulty injection nozzles - Clean or change injection nozzles.
Insufficient fuel injection pressure - Repair or replace injection pump.
Valve clearance is out of adjustment - Correct valve clearance needs to be set.
Low idle speed setting is incorrect - Adjust the low idle speed.
Fuel hoses or lines clogging - Fuel lines and hoses need to be cleaned.
Worn cylinder head gasket - Gasket should be replaced.
Piston rings are worn or defective - Piston rings replacement required.

Engine overheats

Engine has a lack of coolant - Add coolant fluid and inspect the cooling system for leaks.
Not enough engine oil - Fill up the oil to required level.
Dirty radiator fins or faulty radiator cap - Replace cap or clean radiator.
Broken or loose fan belt - Replace as required.
Engine is overloaded - Change to lower gear or reduce load.

Oil pressure is low

Engine oil level low - Need to add oil.
Oil filter clogging - Service or replace engine oil filter.
Wrong oil viscosity - Drain and refill with oil of correct grade and viscosity.
Crankshaft bearing oil clearance is incorrect - Install new bearings.
Oil pump is damaged - Remove and inspect oil pump.

Engine knocking or noise

Engine oil level low - Fill up the engine oil.
Engine is not preheated - Warm up the engine.
Incorrect adjustment of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.
Incorrectly adjusted low idle speed - Adjust as required.
Dirty or defective injectors - Inspect fuel injectors and change as required.
Misaligned or defective connecting rod Connecting rod must be aligned or replaced.
Pistons are worn or broken - Pistons need to be replaced.

Transmission Troubleshooting
Lack of transmission oil pressure

Low fluid level - Checking transmission fluid level and add if necessary.
Transmission fluid filter is clogged (if fitted) - Service or change transmission fluid filter.
Stuck relief valve - Install a new relief valve.

Transmission noises

Transmission fluid level is low - Need to add transmission fluid.
Transmission fluid is dirty - Change the fluid.
Defective gears or improper backlash - Adjust backlash properly or replace the gears.
Bearings are broken or worn - Bearings replacement required.
Worn or damaged gear shift forks - Change the shift forks.
Shaft splines are worn or damaged - Change defective shaft.

Hard shifting

Stuck or worn gear shift linkage - Shift linkage need to be replaced.
Shift forks are worn or bent - Shift forks need to be replaced.
Gearshift mechanism is damaged - Replace or repair the mechanism.
Clutch is faulty or misadjusted - Adjust correctly or replace.

Transmission fluid leakage

Transmission fluid level is exceeded - Excess fluid must be drained.
Broken seals or gaskets - Seals and gaskets replacement required.

Hydraulic System Troubleshooting
Insufficient hydraulic fluid pressure

Hydraulic oil level low - Need to add oil.
Hydraulic oil filter is clogged - Replace hydraulic filter element or service if necessary.
Hydraulic pump not working - Install a new hydraulic oil pump.
Incorrect adjusted hydraulic spool valve - Adjust the spool valve correctly.
Damaged hydraulic cylinder - Repair or replace hydraulic cylinder.
Leaks in hydraulic pipes - Inspect the system for leaks and fix it.

Hydraulic system overheating

Damaged main relief valve - Relief valve replacement required.
Incorrect type of hydraulic fluid - Use the correct type of fluid.
Dirty hydraulic fluid - The fluid must be changed.
There is air in the hydraulic system - Bleed hydraulic system.

Hitch not raising or hitch raises slowly

Excessive loading on the hitch - Reduce the load is required.
Insufficient hydraulic fluid - Add fluid as required.
Clogged hydraulic oil filter element - Clean the hydraulic filter or install new filter element.
Defective hydraulic pump - Replace or repair hydraulic oil pump.
Faulty main relief valve - Relief valve must be changed.
Hydraulic spool valve block is faulty - Repair or replace hydraulic valve.
Broken hydraulic cylinder - Repair or change hydraulic cylinder.
Suction pipe is disconnected or broken - Connect or replace pipe.

Hitch cannot be lowered or lowering is too slowly

Incorrect adjusted hydraulic spool valve - Adjust the spool valve correctly.
Hydraulic cylinder is broken - Change or repair hydraulic cylinder.
Unadjusted hitch - The 3-point hitch must be adjusted.
Worn lift arm shaft - Replace the shaft.

Hitch lift or drop is jerky

There is air in the hydraulic system - Bleed hydraulic system.
Hydraulic oil contamination - Change the oil.
Hydraulic pump not working - Repair or replace hydraulic oil pump.
Defective hydraulic spool valve - Repair or replace hydraulic valve.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.

Steering System Troubleshooting
Difficult steering

Incorrectly assembled or damaged steering column - Reassemble the steering column correctly or change it.
Air in steering system - Bleed air.
Not adjusted toe-in - Check and adjust toe-in.
Front tires wear unevenly - Change the tires.
Defective hydraulic steering pump - Repair or replace steering pump.
Pump flow control valve is stuck or worn - Service or replace flow control valve.
Not enough steering oil - Check oil level and add steering oil as required.

Steering wheel free play is excessive

Worn steering column coupling or shaft - Replace faulty component.
Steering pump is worn - Install a new hydraulic steering pump.
Steering linkage parts are loose or worn - Check and replace as required.

Tractor pulls to right or left

Front tyres wear unevenly - Change the tyres.
Incorrect toe-in - Adjust toe-in wheels.
Loose or worn steering linkage components - Change or repair steering linkage.
Front wheel bearings are damaged or incorrectly adjusted - Replace or adjust the bearings correctly.

Electrical System Troubleshooting
Battery will not charge

Corroded or loose electrical wire connections - Service or tighten connections.
Battery terminal connectors are defective - Change terminal connectors.
Dead cell in battery - Battery change required.
Loose or damaged belt - Adjust belt tension or change the belt.

Starter motor turns slow

Battery capacity is low - Low battery charging, charge as required.
Battery discharges quickly - Service charging system or replace battery.
Bad terminals or disconnected battery cables - Check cable connections and replace or service terminals.

Starter motor is not working

Battery is drained or worn - Need to charge or replace the battery.
Disconnected or incorrectly connected wires - Inspect battery wires and connect correctly.
Low battery output - Battery needs to be recharged.
Defective starter motor - Replace or repair starter.



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