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New Holland C234 Troubleshooting

The New Holland C234 compact track loader driveline system components: a 207 cu.in (3.4L) FPT F5B FL413E 4-cylinder direct injection turbocharged diesel engine with a rated power of 84 hp (62 kW), and 2-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 24.2 gal/min (91.5 l/min). The system pressure is 3050 psi (210 bar). The New Holland C234 is equipped with hydraulic disc brakes and steel-embedded rubber tracks. The compact track loader has a lift height of 126.5" (3215 mm) to hinge pin and dump height of 102.4" (2600 mm). The rated operating capacity is 2380 lbs (1080 kg), and tipping load is 6800 lbs (3085 kg).

Engine Troubleshooting

Diesel hard to start or doesn't start
Air in the fuel lines - Bleed the fuel lines.
Fuel filter plugging - Change the filter element.
Fuel injection nozzles are damaged - Replace injection nozzles.
Water or dirt in fuel system - Drain, flush, and service the system.
Excessive valve clearance - Adjustment procedure required.
Damaged fuel injection pump - Repair or replace injection pump.

Diesel starts but immediately shuts off
Air cleaner is clogged - Clean or change.
Fuel filter element is dirty - Replace filter element.
Poor fuel injection pump tightness - Look for any leaks of fuel pump, tighten it fast.
Clogged or defective injectors - Clean fuel injectors or change it.
Fuel injection pump is not working correctly - Repair or replace injection pump.

Engine shuts off suddenly while running
Engine is not fully warmed up - Normalize the temperature by warming up the engine.
Fuel filter plugging - Replace filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are faulty or clogged - Check injection nozzles and replace if required.
Wrong setting of fuel injection pump timing - Set up as recommended.

Engine stops when idling
Incorrectly set low idle speed - Normalize low idle speed.
Fuel injection pump malfunctioning - Install a new pump or rebuild.
Dirty or defective injectors - Inspect fuel injectors and change as required.
Valve clearance is out of adjustment - Check and adjust.

Diesel engine loses power
Plugged air filter - Service or replace the air filter.
Fuel injection nozzles are clogged or faulty - Service or change injection nozzles.
Improper fuel injection pressure - Test fuel injection pressure and adjust it correctly.
Valve clearance is out of adjustment - Adjustment procedure required.
Low idle speed adjustment is incorrect - Adjust low idle speed.
Restricted fuel hoses or lines - Clean fuel hoses and lines.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Piston rings are leaking or defective - Install new piston rings.

Engine overheats
Coolant level is low - Fill radiator to proper level and check components for faults.
Engine oil level is low - Check and refill engine oil.
Dirty radiator core or faulty radiator cap - Clean radiator or install new cap.
Fan belt is broken or worn - Change the fan belt.
Diesel engine overloaded - Reduce load on the engine.

Oil pressure too low
Insufficient engine oil - Fill crankcase to proper oil level.
Oil filter element clogged - Clean or replace engine oil filter element.
Improper type of engine oil - Drain and refill with oil of correct grade and viscosity.
Incorrect crankshaft bearing oil clearance - Change bearings.
Oil pump is defective - Remove and inspect oil pump.

Engine knocking or noise
Not enough engine oil - Fill up the engine oil.
Coolant temperature is low - Warm up the engine.
Incorrect adjustment of fuel injection pump timing - Set it up as required.
Low idle speed set incorrectly - Test and adjust.
Fuel injector fault - Replace fuel injectors.
Connecting rod is worn or not aligned - Need to change or align the connecting rod.
Pistons are broken or worn - Install new pistons.

Drive System Troubleshooting

Drive system doesn't operate in one direction or either direction
Insufficient hydraulic oil - Need to add oil.
Undercarriage tracks are damaged or blocked - Remove blockage or repair tracks.
Defective or worn relief valve - Rebuild or install a new relief valve.
Dirty hydraulic filter or suction line - Check, clean, or replace if required.
Defective foot or hand controls - Replace or repair.
Drive motor or pump is worn - Inspect and replace as necessary.

Machine will not drive straight or drives jerky
Damaged or jammed undercarriage tracks - Repair or remove jamming.
Tracks are loose or worn - Replace tracks or adjust track tension.
Undercarriage track frame is clogged with dirt or foreign objects - Clean track frame, remove foreign objects.

Power is too low
Hydraulic oil filter is plugged - Change or clean hydraulic filter.
Relief valve is worn or opened - Close or replace relief valve.
Transmission components are defective or worn - Inspect and replace defective parts.
Input drive shaft is stuck - Replace drive shaft.
Hydraulic system is leaking air - Air bleeding is required.

Overheated drive system
Hydraulic oil level is low - Check and refill the hydraulic oil.
Clogged hydraulic fluid filter - Replace or clean hydraulic filter.
Relief valve failure - Repair or replace.
Damaged drive pump or hydraulic motor - Replace or repair faulty component.
Hydraulic oil cooler is plugged - Clean cooling fins as required.
Drive system overload - Load needs to be reduced.

Drive system is noisy
Oil viscosity is incorrect - Drain and refill with correct oil.
Hydraulic system is leaking air - Air bleeding is required.
Damaged drive pump or hydraulic motor - Repair or change faulty component.
Worn or damaged mechanical components of drive system - Inspect the components and repair as required.

Hydraulics Troubleshooting

Hydraulic system is overheated
Hydraulic pressure incorrectly adjusted - Adjust it correctly.
Main relief valve is damaged or adjusted improperly - Adjust the valve or replace if necessary.
Dirty hydraulic fluid - Hydraulic fluid change required.
Not enough hydraulic fluid in the system - Need to add fluid.
Hydraulic pump is worn - Repair or install new hydraulic pump.

Lift arm does not lower or raise
Lift controls are damaged - Replace or repair.
Hydraulic pump failure - Install new pump or repair it.
Hydraulic control valve malfunction - Repair or change hydraulic valve.
Broken hydraulic cylinder - Repair or install a new lift cylinder.
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.

Bucket tilt does not work
Defective bucket controls - Inspect and repair if necessary.
Hydraulic pump failure - Repair or install new hydraulic pump.
Damaged hydraulic control valve - Repair or change hydraulic valve.
Faulty hydraulic bucket cylinder - Replace or repair cylinder.
Insufficient hydraulic oil - Check and refill the hydraulic oil.

Boom or bucket is working slowly
Hydraulic pump is defective - Check pump performance and change it if necessary.
Hydraulic cylinder oil leakage - Install new cylinder seals.
Low hydraulic fluid level - Add fluid as required.
Damaged or incorrect adjusted hydraulic control valve - Repair or set properly.
Low hydraulic pressure - Correct setting is required.

Lift arm or bucket is jerky
Air trapped in hydraulic system - Bleed air from hydraulic system.
Hydraulic oil filter element is clogged - Clean or change the filter.
Hydraulic fluid is dirty - Change hydraulic fluid.
Scored cylinder tube or rod - Change worn component.

Hydraulic pump is excessively noisy
Hydraulic leaks or low oil level - Refill hydraulic oil or repair leaks in system.
Clogged hydraulic filter - Change or clean oil filter.
Plugged suction line - Suction line must be serviced.
Air enters the pump - Bleed air from hydraulics.
Pump components are faulty - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery cannot be charged
Wiring connections are loose or corroded - Clean or tighten wiring connections.
Battery terminal connectors are defective - Replace terminal connectors.
Battery failing - Replace the battery.
Damaged or loose belt - Adjust belt tension or change the belt.

Starter cranks slow
Battery capacity is low - Low battery charging, charge as required.
Battery is draining quickly - Service or replace the battery.
Corroded battery terminals or disconnected wires - Check cable connections and replace or service terminals.

Starter doesn't crank
Battery is drained or worn - Recharge or replace battery.
Wiring is incorrectly connected or disconnected - Inspect wiring and connect correctly.
Low battery power - Recharge the battery.
Defective starter motor - Change or repair starter.