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Case IH MX90C Troubleshooting

The Case IH MX90C utility tractor was manufactured between 1998 and 2002. The tractor is powered by 244 cu.in (4 L) Perkins 1004-4T 4-cylinder direct injection turbocharged diesel engine with a rated power of 90 hp (67.1 kW).

The Case IH MX 90 C is fitted with a 2 types of transmission. Type 1: 16x12 partial powershift transmission. Type 2: 32x24 partial powershift transmission with creeper. The maximum travel speed (forward/reverse): 23 mph (37 kph) and 13.7 mph (22 kph). The closed center pressure flow compensated hydraulic system has a pump with a rated capacity of 25 gpm (94.6 lpm).

The hydraulic system pressure is 203 bar (2950 psi). The Case IH MX90C tractor is equipped with a hydrostatic power steering system, differential hydraulic wet disc, 14.9x24 front tyres, and 18.4x34 rear tyres. The wheelbase is 95.4 in (2420 mm).

Engine Troubleshooting
Engine difficult to start or won't start

There is air in the fuel system - Bleed the system.
Fuel filter plugging - Change filter element.
Clogged injection nozzle - Replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
The valve clearance is not adjusted - Correct valve clearance.
Fuel injection pump is defective - Install a new fuel pump or repair.

Diesel starts but then stops

Plugged air filter - Clean or replace element.
Fuel filter element clogging - Clean or replace the filter.
Fuel injection pump has loose connections - Tighten the connections.
Defective fuel injectors - Replace fuel injectors.
Damaged fuel injection pump - Install a new fuel pump or repair.

Engine stalls during operation

Low coolant temperature - Warm up the engine.
Fuel filter plugging - Clean the filter or install new filter element.
Air trapped in fuel system - Bleed air.
Fuel injection nozzles are damaged or dirty - Check injection nozzles and replace if required.
Improper fuel injection timing - Set up as recommended.

Engine stalls at idle

Wrong adjustment of low idle speed - Normalize low idle speed.
Fuel injection pump is faulty - Install a new fuel pump or repair.
Dirty or defective injectors - Clean fuel injectors or change it.
Incorrect valve clearance - Adjust valve clearance.

Engine power is too low

Dirty air filter element - Service air cleaner.
Dirty or faulty injection nozzles - Test injection nozzles and change if necessary.
Fuel injection pressure is wrong - Check the fuel injection pressure and adjust if necessary.
The valve clearance is not adjusted - Correct valve clearance needs to be set.
Incorrect low idle setting - Correct low idle settings.
Dirt in the fuel hoses or lines - Clean fuel system lines and hoses.
Defective cylinder head gasket - Install a new gasket.
Piston rings are broken or leaking - Replace piston rings.

Engine overheated

Low coolant level - Refill to the correct level and inspect system for leaks.
Lack of engine oil - Fill the crankcase with engine oil.
Clogged radiator core or leaking radiator cap - Clean radiator or change cap.
Fan belt slipping or worn - Belt replacement is recommended.
Engine overload - Load reducing required.

Low oil pressure

Lack of oil - Add oil to the engine crankcase.
Oil filter clogged - Replace or service engine oil filter.
Incorrect oil viscosity - Fill up with the correct oil viscosity.
Incorrect crankshaft bearing oil clearance - Replace bearings.
Oil pump is worn or damaged - Remove and inspect oil pump.

Engine knocks or noises

Lack of engine oil - Fill up the oil to required level.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Incorrect adjustment of fuel injection pump timing - Adjust as recommended.
Too low idle RPM - Need to adjust idle speed.
Fuel injectors are faulty or clogged - Clean fuel injectors or change it.
Connecting rod is defective or not aligned - Connecting rod needs to be aligned or changed.
Worn or scored pistons - Pistons need to be replaced.

Transmission Troubleshooting
Insufficient transmission oil pressure

Lack of transmission fluid - Check and refill the transmission fluid.
Dirty transmission fluid filter element (if equipped) - Service or replace the transmission fluid filter.
Defective relief valve - Replace relief valve as required.

Transmission noises

Transmission oil insufficient - Need to add transmission oil.
Transmission fluid is dirty - Change the fluid.
Gears are damaged or backlash is incorrect - Change worn gears or adjust backlash correctly.
Worn or damaged bearings - Faulty bearings should be replaced.
Shift forks are bent or worn out - Replace the shift forks.
Stuck or worn shaft splines - Change the shaft.

Hard to shift gears

Rusty or worn gear shift linkage - Change or lubricate shift linkage.
Shift forks are bent or worn out - Shift forks need to be replaced.
Defective parts in the gearshift mechanism - Replace defective parts.
Worn or improperly adjusted clutch - Change or adjust clutch.

Transmission fluid leaks

Too much oil in transmission - Drain the excess oil.
Broken seals or gaskets - Replace worn seal or gaskets.

Hydraulics Troubleshooting
Hydraulic fluid pressure is low

Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.
Clogged hydraulic oil filter - Hydraulic filter maintenance required.
Hydraulic pump failure - Replace or repair hydraulic oil pump.
Hydraulic control valve block is out of adjustment - Control valve needs to be adjusted.
Hydraulic cylinder is broken - Change or repair hydraulic cylinder.
Leaking hydraulic pipes - Find leaks in the system and fix it.

Hydraulic system overheated

Damaged main relief valve - Replace relief valve.
Hydraulic oil type is improper - Fill up with the proper type of oil.
Hydraulic oil is dirty - Hydraulic oil change required.
Air in hydraulic system - Bleed air from hydraulic system.

Hitch can't lift or lifts too slowly

Excessive loading on the hitch - The load should be reduced.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Hydraulic oil filter is clogged - Clean or replace the hydraulic filter.
Hydraulic pump is defective - Repair or replace hydraulic fluid pump.
Faulty main relief valve - Install a new relief valve.
Defective hydraulic control valve block - Replace or repair the valve.
Damaged hydraulic cylinder - Replace or repair hydraulic cylinder.
Suction line is disconnected or broken - Replace or connect correctly.

3-point hitch won't lower or lowers slowly

Incorrect setting hydraulic control valve - Use the correct adjustment.
Hydraulic cylinder failure - Repair or change hydraulic cylinder.
The three-point hitch is not adjusted - Need to make adjustments.
Worn hitch cross shaft - Change the shaft.

Hitch jerks when drop or lift

There is air in the hydraulic system - Bleed hydraulic system.
Contaminated hydraulic fluid - Change hydraulic fluid.
Hydraulic pump not working - Repair or replace hydraulic fluid pump.
Defective hydraulic control valve - Replace or repair the valve.
Damaged hydraulic cylinder - Repair or replace hydraulic cylinder.

Steering Troubleshooting
Steering wheel is hard to turn

Defective or incorrectly mounted steering column - Change steering column or mount correctly.
Air trapped inside steering system - Bleed the system of air.
Incorrect toe-in - Check toe-in and correct.
Front tires are worn unevenly - Install new tires.
Steering pump is worn - Check the steering pump and replace if necessary.
Stuck or damaged steering pump control valve - Flush or change flow control valve.
Not enough steering oil - Check oil level and add steering oil as required.

Steering wheel has too much free-play

Steering column coupling or shaft is extremely worn out - Change faulty part.
Damaged hydraulic steering pump - Repair or replace steering pump.
Worn or loose steering linkage joints - Repair or replace steering linkage.

Tractor pulls to right or left

Uneven wear on front tyres - Replace the tyres.
Incorrect toe-in - Adjust toe-in properly.
Loose or worn steering linkage parts - Repair or replace steering linkage.
Front wheel bearings are damaged or incorrectly adjusted - Change or adjust bearings correctly.

Electrical Troubleshooting
Battery will not charge

Electrical cable connections are loose or corroded - Tighten or clean connections.
Electrical terminal connectors are defective - Terminal connectors need to be changed.
Battery bad cell - Install a new battery.
Loose or defective belt - Adjust belt tension or change the belt.

Starter turns slow

Battery voltage is low - Battery is drained, recharge it.
Battery will not hold charge - Battery needs to be serviced or replaced.
Corroded battery terminals or disconnected wires - Check cable connections and change or clean terminals.

Starter will not crank

Battery is discharged or worn - Recharge or change battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery output - Battery is drained, recharge it.
Faulty starter motor - Starter needs to be replaced.



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