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Mustang 2700V Troubleshooting

The Mustang 2700V NXT2 skid steer loader is powered by 202.6 cu.in (3.3L) Yanmar 4TNV98CT-NMS 4-cylinder vertical in-line turbocharged liquid-cooled diesel engine with a rated power of 70.7 hp (52.7 kW). The Mustang 2700V NXT2 is equipped with a vertical-lift loader boom, single or two speed hydrostatic transmission, 100H drive chains, and 12x16.5 HD standard tires. The hydraulic system has a pump with fluid flow rate of 23.5 gpm (89.6 lpm) or 35 gpm (132.6 lpm). The skid steer loader has a rated operating capacity of 2700 lbs (1225 kg) and tipping load of 5400 lbs (2450 kg). The lift height is 130.3" (3310 mm) to hinge pin, and dump height is 100" (2540 mm).

Engine Troubleshooting

Engine starts up hard or doesn't start
Air trapped in fuel system - Bleed air.
Fuel filter plugging - Change filter element.
Dirty or faulty injection nozzles - Replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Excessive valve clearance - Check and adjust.
Defective fuel injection pump - Replace or repair injection pump.

Diesel starts and then shuts off
Clogged air filter - Service or replace the air filter.
Fuel filter element is dirty - Change or clean the filter element.
Fuel injection pump has loose connections - Tighten the connections.
Defective or clogged fuel injectors - Clean fuel injectors or change it.
Fuel injection pump is faulty - Rebuild or change fuel pump.

Engine shuts off suddenly while running
Low coolant temperature - Warm up engine as required.
Fuel filter element is clogged - Service or replace the filter.
Air in fuel system - Bleed fuel system.
Defective or clogged injection nozzle - Install a new kit of correctly balanced nozzles.
Improper fuel injection timing - Adjust according to specifications.

Engine stalls at low idle speed
Low idle speed setting is not correct - Adjust the low idle speed.
Defective fuel injection pump - Rebuild or replace pump.
Dirty or defective injectors - Test and replace fuel injectors if necessary.
Valve clearance is not correct - Adjust valve clearance.

Engine lacks power
Air filter is clogged - Change or service air filter element.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Insufficient fuel injection pressure - Adjust to correct pressure.
The valve clearance is incorrect - Adjustment procedure required.
Low idle speed setting is not correct - Adjust low idling as recommended.
Dirt in the fuel lines or hoses - Service fuel lines and hoses.
Cylinder head gasket is damaged - Replace the gasket as required.
Piston rings are damaged or leaking - Change piston rings.

Engine overheating
Low engine coolant - Fill the cooling system and check components for leaks or other faults.
Lack of engine oil - Need to add engine oil.
Clogged radiator fins or damaged radiator cap - Clean radiator or install new cap.
Fan belt slipping or worn - Belt change is required.
Engine is overloaded - Load reducing required.

Oil pressure is low
Not enough oil in the engine - Add oil to the engine crankcase.
Oil filter element clogged - Service or replace engine oil filter.
Different type of engine oil - Use correct viscosity oil.
Incorrect oil clearance in crankshaft bearing - Bearings need to be reinstalled.
Defective oil pump - Check and replace if necessary.

Engine noises or knocks
Lack of engine oil - Fill up the engine oil.
Low coolant temperature - Normalize the temperature by warming up the engine.
Incorrect adjustment of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Improperly adjusted low idle speed - Correct low idle adjustment.
Damaged or clogged injectors - Test and replace fuel injectors if necessary.
Misaligned or defective connecting rod - Need to align or replace the connecting rod.
Scored or worn pistons - Replace the pistons.

Drive System Troubleshooting

Drive system doesn't work in either direction
Hydraulic fluid level low - Check and refill the hydraulic fluid.
Drive chain is damaged - Check drive chain and change faulty parts.
Relief valve is damaged - Repair or install a new relief valve.
Clogged suction line or hydraulic filter - Service suction line or change hydraulic filter.
Hand or foot controls failure - Check and repair as required.
Drive pump or motor malfunction - Inspect and change as required.

Loss of power
Dirty hydraulic oil filter - Check, clean, or replace as required.
Faulty or opened relief valve - Close or replace relief valve.
Worn or faulty transmission components - Inspect and replace faulty parts.
Input drive shaft is stuck - Repair or install a new drive shaft.
Air leaks in hydraulic system - Bleed hydraulic system.

Drive system is overheated
Hydraulic oil is insufficient - Need to add oil.
Hydraulic fluid filter is dirty - Check, clean, or replace as required.
Relief valver is broken - Repair or change.
Drive pump or hydraulic motor malfunction - Inspect and replace as necessary.
Oil cooler is clogged - Cooling fins should be cleaned.
Drive system overloaded continuously - Reduce loading.

Excessive noise
Improper oil viscosity - Drain and refill with correct oil.
Air in hydraulic system - Bleed hydraulic system.
Hydraulic motor or drive pump is defective - Check and repair if required.
Worn or defective mechanical components of drive system - Inspect the parts for worn or defect and repair as needed.

Hydraulics Troubleshooting

Hydraulic system has overheating
Hydraulic pressure is incorrect - Hydraulic pressure must be set correctly.
Main relief valve is defective or unadjusted - Adjust the valve or replace if necessary.
Hydraulic fluid is dirty - Fill up with fresh hydraulic fluid.
Not enough hydraulic oil in the system - Fill the hydraulic system with oil.
Worn hydraulic oil pump - Install new pump or repair it.

Boom cannot be lowered or raised
Lift controls malfunction - Inspect and repair if necessary.
Defective hydraulic pump - Repair or change pump if required.
Faulty hydraulic control valve - Repair or replace the valve.
Defective hydraulic cylinder - Replace or repair boom cylinder.
Low hydraulic oil level - Checking hydraulic oil level and add if necessary.

Bucket can't tilt
Defective bucket controls - Check and repair as required.
Defective hydraulic pump - Repair or change pump if required.
Defective hydraulic control valve - Install a new hydraulic valve or repair it.
Bucket cylinder malfunction - Repair or change cylinder.
Hydraulic fluid level low - Fill up the hydraulic fluid.

Boom or bucket is moving slowly
Hydraulic pump is worn - Test the pump performance and change pump if required.
Hydraulic cylinder oil leakage - Install new cylinder seals.
Low hydraulic oil level - Need to add oil.
Faulty or incorrect setting hydraulic control valve - Adjust correctly or repair.
Low hydraulic pressure - Adjust it correctly.

Bucket or boom is moving jerkily
Hydraulic system is leaking air - Bleed hydraulic system.
Hydraulic oil filter element is clogged - Service or replace the hydraulic filter.
Contaminated hydraulic fluid - Fill up with fresh hydraulic fluid.
Cylinder tube or rod scoring - Change damaged component.

Hydraulic pump makes excessive noise
Insufficient oil level or leaking hydraulic system - Add hydraulic oil or correct system leaks.
Hydraulic filter clogging - Service or replace hydraulic filter.
Dirty suction line - Need to clean the suction line.
Pump sucks air - Need to bleed air.
Pump parts are faulty - Rebuild or install new pump.

Electrical Troubleshooting

Battery cannot be charged
Corroded or loose wire connections - Tighten or service connections.
Defective electrical terminal connectors - Terminal connectors should be replaced.
Faulty cell in battery - Install a new battery.
Belt is defective or loose - Need to adjust belt tension or replace belt.

Starter motor cranks slow
Low battery capacity - Low battery charging, charge as required.
Battery discharges quickly - Service charging system or replace battery.
Faulty battery terminals or disconnected cables - Check cables and clean or change terminals.

Starter is not working
Battery is drained or defective - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery capacity - Recharge the battery.
Starter motor is damaged - Repair or install a new starter.