Case 95XT Skid Steer Troubleshooting

The Case 95XT skid steer loader is powered by 239 cu.in (3.9L) 4T-390 4-cycle 4-cylinder direct injection turbocharged diesel engine with a rated power of 85 hp (63.4 kW) at 2500 rpm. The Case 95XT is equipped with a two-speed hydrostatic transmission, axial piston drive pumps, vertical-lift boom, and 12x16.5 standard tires. The open center hydraulic system has a pump with fluid flow rate of 22.8 gpm (86.3 lpm). The hydraulic pressure is 3000 psi (207 bar). The skid steer loader has a rated operating capacity of 3150 lbs (1430 kg) and tipping load of 6300 lbs (2860 kg). The lift height is 125.5 inches (3190 mm) to hinge pin, and dump height is 95 inches (2410 mm).

Engine Troubleshooting

Engine starts up hard or doesn't start

Air in fuel tank - Bleed fuel tank.
Fuel filter element clogging - Service or replace the filter.
Fuel injection nozzles are damaged - Install a new kit of correctly balanced nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Incorrect valve clearance - Adjust to proper valve clearance.
Fuel injection pump malfunction - Replace or repair injection pump.

Diesel starts but immediately shuts off

Air filter is plugged - Clean or change filter.
Fuel filter element is dirty - Install new filter element.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Damaged fuel injection pump - Repair or install new pump.

Engine stops unexpectedly during operation

Coolant temperature is low - Warm up to required temperature.
Fuel filter element is dirty - Change the filter element.
Air in the fuel lines - Bleed the fuel lines.
Clogged injection nozzle - Service or change injection nozzles.
Fuel injection pump timing is wrong - Set the fuel pump timing correctly.

Engine stalling at idle

Too low idle RPM - Adjustment required.
Fuel injection pump failure - Rebuild or install a new injection pump.
Fuel injectors are faulty or clogged - Test and replace fuel injectors if necessary.
Valve clearance is out of adjustment - Correct valve clearance needs to be set.

Diesel engine is losing power

Air filter is clogged - Replace or clean air filter element.
Fuel injection nozzles are dirty or defective - Install a new kit of correctly balanced nozzles.
Fuel injection pressure is wrong - Adjust to proper pressure.
Incorrect valve clearance - Adjust valve clearance according to specifications.
Wrong adjustment of low idle speed - Adjust as required.
Fuel hoses or lines are dirty - Clean fuel lines and hoses.
Cylinder head gasket defective - Install new cylinder head gasket.
Worn or broken piston rings - Replace the piston rings as required.

Engine overheated

Engine coolant is insufficient - The cooling system needs to be refilled and checked for faults.
Lack of engine oil - Check oil level and add oil as required.
Defective radiator cap or clogged radiator fins - Clean radiator or replace cap.
Damaged or worn fan belt - Change the fan belt.
Engine overload - Load reducing required.

Oil pressure too low

Not enough oil in the engine - Check and refill the oil.
Oil filter element clogged - Change or service engine oil filter.
Improper type of engine oil - Drain and refill with oil of correct grade and viscosity.
Crankshaft bearing has excessive oil clearance - Replace bearings.
Oil pump is worn or damaged - Inspect and change as required.

Engine knocking or noise

Engine oil insufficient - Check oil level and add oil as required.
Engine is not fully warmed up - Warm up to required temperature.
Fuel injection pump timing is not adjusted - Set it up as required.
Low idle speed adjustment is incorrect - Correct low idle adjustment.
Fuel injector fault - Clean or replace fuel injectors.
Misaligned or faulty connecting rod - Replace or align connecting rod.
Worn or broken pistons - Have pistons replaced.

Drive System Troubleshooting

Drive system doesn't function in one direction or either direction

Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.
Damaged drive chain - Inspect drive chain and replace faulty parts.
Input drive shaft is defective - Rebuild or change.
Defective relief valve - Change or repair defective relief valve.
Hydraulic filter or suction line is plugged - Check, clean, or change if necessary.
Hand or foot controls failure - Repair or change.
Drive motor or pump is worn - Inspect and change as required.

Power is too low

Plugged hydraulic oil filter - Replace hydraulic filter.
Relief valve is defective or opened - Replace or close relief valve.
Faulty or damaged transmission components - Inspect and change defective parts.
Worn input drive shaft - Replace or service the drive shaft.
Hydraulic system is leaking air - Bleed air from system.

Overheated drive system

Hydraulic fluid level low - Fill up the hydraulic fluid.
Dirty hydraulic fluid filter - Change or clean hydraulic filter.
Relief valve is worn or damaged - Repair or install a new relief valve.
Defective drive pump or hydraulic motor - Check and repair if required.
Dirty oil cooler - Cooling fins should be cleaned.
Drive system overloaded continuously - Reduce the load.

Drive system is noisy

Incorrect oil viscosity - Use oil of correct viscosity.
Air leaks in hydraulic system - Air bleeding is required.
Hydraulic motor or drive pump failure - Repair or change faulty component.
Mechanical components of drive system are worn or damaged - Inspect the components for defect or damage and repair as needed.

Hydraulics Troubleshooting

Hydraulic system has overheating

Hydraulic pressure is incorrect - Correct setting is required.
Main relief valve is faulty or misadjusted - Adjust or change relief valve.
Dirty hydraulic fluid - The fluid must be changed.
Not enough hydraulic oil in the system - Check oil level and add hydraulic oil as required.
Hydraulic pump is faulty - Repair or install new hydraulic pump.

Boom can't lift or drop

Damaged lift controls - Change or repair.
Hydraulic pump not working - Install new pump or repair it.
Hydraulic control valve failure - Install a new hydraulic valve or repair it.
Hydraulic cylinder is defective - Repair or replace hydraulic cylinder.
Hydraulic oil is insufficient - Check and refill the hydraulic oil.

Bucket won't move

Bucket tilt controls are damaged - Check and repair as required.
Hydraulic pump is broken - Change or repair hydraulic pump if required.
Hydraulic control valve is defective - Repair or change hydraulic valve.
Hydraulic bucket cylinder is broken - Install a new cylinder or repair it.
Insufficient hydraulic fluid - Fill up the hydraulic fluid.

Boom or bucket runs slowly

Hydraulic pump is faulty - Check pump flow and change pump if necessary.
Leaking hydraulic cylinder - Correct leakage by changing the seals.
Low hydraulic fluid level - Add fluid as required.
Worn or unadjusted hydraulic control valve - Set properly or repair.
Hydraulic pressure loss - Adjust pressure correctly.

Jerky operation of the bucket or boom

Air trapped in hydraulic system - Bleed air from hydraulic system.
Hydraulic oil filter clogging - Clean or install new filter.
Contaminated hydraulic oil - Change hydraulic oil.
Cylinder rod or tube is scratched - Replace defective component.

Hydraulic pump makes excessive noise

Leaking hydraulic system or insufficient oil level - Refill hydraulic oil or repair leaks in system.
Hydraulic filter is clogged - Clean or change the filter.
Suction line is dirty - Need to service the suction line.
Pump is sucking air - Need to bleed air.
Damaged pump parts - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery is not charging

Electrical cable connections are loose or corroded - Service or tighten cable connections.
Electrical terminal connectors are faulty - Terminal connectors should be replaced.
Battery faulty cell - Battery replacement required.
Belt is defective or loose - Belt needs to be adjusted or changed.

Starter turning slow

Low battery capacity - Battery is drained, recharge it.
Battery is draining quickly - Service battery or change it.
Faulty battery terminals or disconnected cables - Connect cables properly or replace terminals.

Starter will not work

Battery is low or faulty - Need to charge or replace the battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Battery capacity is low - Battery is drained, charge it.
Starter motor failing - Replace or repair starter.