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Mustang 2086 Troubleshooting

The Mustang 2086 skid steer loader is powered by Cummins B3.3 4-cylinder turbocharged diesel engine with a rated power of 80 hp (60 kW) or Yanmar 4TNV98T 4-cylinder turbocharged diesel engine with a rated power of 84 hp (63 kW). The Mustang 2086 is equipped with a radial-lift boom, single or two speed hydrostatic transmission, 100H drive chains, and 12x16.5 standard tires. The hydraulic system has a pump with fluid flow rate of 21.8 gpm (82 lpm) or 36.9 gpm (140 lpm). The skid steer has a rated operating capacity of 2600 lbs (1180 kg) and tipping load of 5200 lbs (2360 kg). The lift height is 123" (3125 mm) to hinge pin, and dump height is 95" (2415 mm).

Engine Troubleshooting

Engine hard to start or won't start
Air in fuel tank - Bleed fuel tank.
Fuel filter plugging - Clean the filter element.
Fuel injection nozzles are damaged - If necessary, replace with a new nozzle.
Water or dirt in fuel system - Drain, flush, and service the system.
Valve clearance is wrong - Adjust valve clearance.
Defective fuel injection pump - Rebuild or install a new injection pump.

Engine starts and then shuts off
Air cleaner is dirty - Clean or replace element.
Fuel filter element clogging - Change filter element.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Fuel injectors are dirty or defective - Clean fuel injectors or change it.
Fuel injection pump is not working correctly - Repair or replace injection pump.

Engine stalls after running
Coolant temperature is low - Warm up to required temperature.
Fuel filter element is dirty - Change filter element.
Air in fuel tank - Bleed fuel tank.
Clogged or defective injection nozzles - Test injection nozzles and change if necessary.
Fuel injection pump timing is wrong - Set up as recommended.

Engine stalls when idle
Too low idle RPM - Normalize low idle speed.
Fuel injection pump is broken - Repair or install new pump.
Clogged or defective injectors - Clean or replace fuel injectors.
Improper valve clearance - Adjust valve clearance.

Loss of engine power
Dirty air cleaner - Clean or change cleaner.
Fuel injection nozzles are damaged - Service or change injection nozzles.
Improper fuel injection pressure - Correct the pressure settings.
Valve clearance is not correct - Need to adjust valve clearance.
Incorrect low idle speed adjustment - Normalize low idle speed.
Fuel hoses or lines are dirty - Service fuel hoses and lines.
Damaged cylinder-head gasket - Replace cylinder head gasket.
Piston rings are defective or leaking - Replace the piston rings as required.

Engine is overheated
Coolant level is low - Add coolant fluid and inspect the cooling system for leaks.
Lack of engine oil - Add oil to the engine crankcase.
Faulty radiator cap or dirty radiator fins - Replace cap or clean radiator.
Excessive wear of the fan belt - Replace as required.
Engine overload - Reduce load on the engine.

Oil pressure is low
Oil level is low - Add oil as required.
Dirty oil filter element - Change or clean engine oil filter element.
Oil grade or viscosity is incorrect - Drain crankcase and refill with correct oil.
Excessive oil clearance of crankshaft bearing - Replace bearings.
Oil pump malfunction - Replace as required.

Engine knocking sound or abnormal noise
Insufficient engine oil - Fill the crankcase with engine oil.
Low coolant temperature - Warm up engine as required.
Improper setting of fuel injection pump timing - Set up as recommended.
Low idle speed adjustment is incorrect - Correct low idle adjustment.
Damaged or clogged injectors - Clean or replace fuel injectors.
Connecting rod misalignment or failure - Need to align or replace the connecting rod.
Pistons are worn or scored - Pistons replacement required.

Drive System Troubleshooting

Drive system won't work in one direction or either direction
Hydraulic oil is insufficient - Check and refill the hydraulic oil.
Drive chain failure - Inspect drive chain and replace defective components.
Relief valve malfunction - Service or change relief valve.
Dirty hydraulic filter or suction line - Clean suction line or change hydraulic filter.
Foot or hand controls are damaged - Replace or repair.
Drive pump or motor malfunction - Check and repair if required.

Reduced power
Plugged hydraulic oil filter - Replace or clean hydraulic filter.
Relief valve is worn or opened - Replace or close relief valve.
Defective or worn transmission parts - Inspect and replace defective parts.
Input drive shaft malfunction - Rebuild or change the shaft.
There is air in the hydraulic system - Bleed air from system.

Drive system is overheated
Hydraulic fluid level low - Checking hydraulic fluid level and add if necessary.
Dirty hydraulic fluid filter - Change hydraulic filter.
Faulty relief valve - Repair or change.
Worn hydraulic motor or drive pump - Inspect and change as required.
Oil cooler is clogged - Clean the cooling fins.
Transmission overloading - Reduce drive system load.

Drive system makes excessive noise
Wrong oil viscosity - Use the specified type of oil.
Air in the hydraulic system - Bleed air from hydraulic system.
Hydraulic motor or drive pump failure - Repair or replace faulty component.
Defective or worn mechanical parts of drive system - Inspect the parts for worn or defect and repair as needed.

Hydraulics Troubleshooting

Hydraulic system is overheated
Hydraulic pressure is not correct - Correct setting is required.
Main relief valve malfunction or improper adjustment - Replace or set up the relief valve.
Hydraulic fluid is dirty - The fluid must be changed.
Not enough hydraulic oil in the system - Fill up the hydraulic oil.
Defective hydraulic pump - Install new pump or repair it.

Lift arm won't raise or lower
Faulty lift controls - Repair or change.
Hydraulic pump failure - Install new pump or repair it.
Hydraulic control valve failure - Install a new valve or repair it.
Damaged hydraulic cylinder - Repair or install a new lift cylinder.
Insufficient hydraulic oil - Need to add oil.

Bucket won't move
Bucket tilt controls are defective - Repair or replace.
Hydraulic pump failure - Install new pump or repair it.
Hydraulic control valve is faulty - Install a new hydraulic valve or repair it.
Defective bucket cylinder - Repair or install a new cylinder.
Hydraulic fluid level low - Checking hydraulic fluid level and add if necessary.

Boom or bucket is working slowly
Hydraulic pump is worn - Check pump capacity and change if necessary.
Hydraulic cylinder oil leakage - Repair leak by replacing the seals.
Low hydraulic fluid level - Fill the system to proper hydraulic fluid level.
Defective or not adjusted hydraulic control valve - Repair or adjust properly.
Hydraulic pressure loss - Correct setting is required.

Bucket or boom is working jerkily
Air in the hydraulic system - Bleed hydraulic system.
Hydraulic oil filter element clogging - Service or change the hydraulic filter.
Contaminated hydraulic oil - The oil must be changed.
Cylinder rod or tube is scuffed - Change damaged component.

Hydraulic pump is excessively noisy
Leaking hydraulic system or insufficient oil level - Repair hydraulic leaks or add oil as required.
Hydraulic filter is clogged - Service or replace hydraulic filter.
Plugged suction line - Need to service the suction line.
Air in hydraulic pump - Bleed air from hydraulics.
Damaged pump components - Install new hydraulic pump or rebuild it.

Electrical Troubleshooting

Battery cannot be charged
Electrical wire connections are loose or corroded - Tighten or service cable connections.
Faulty battery terminal clamps - Terminal clamps need to be replaced.
Battery faulty cell - Use a new battery.
Belt is worn or loose - Change belt or adjust belt tension.

Starter turns slow
Low battery voltage - Charge the battery.
Battery discharges quickly - Service charging system or change battery.
Disconnected battery cables or bad terminals - Check cable connections and change or clean terminals.

Starter is not cranking
Battery is low or faulty - Charge or change the battery.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Low battery capacity - Low battery charging, charge as required.
Starter motor is defective - Starter should be changed.