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Mustang 2076 Troubleshooting

The Mustang 2076 skid steer loader driveline system components: 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), and 1-speed or 2-speed transmission. The hydraulic system has a pump with a rated capacity of 21.5 gpm (81 lpm) or 36 gpm (136 lpm). The Mustang 2076 is equipped with a radial-lift boom, 100H drive chains, and 12x16.5 tires. The skid steer has a max lift height of 123" (3125 mm) to hinge pin and dump height of 95" (2415 mm). The rated operating capacity is 2200 lbs (998 kg), and tipping load is 4400 lbs (1996 kg).

Engine Troubleshooting

Engine starts hard or will not start
Air in fuel tank - Bleed fuel tank.
Dirty fuel filter - Change filter element.
Clogged or defective injection nozzles - Install a new kit of correctly balanced nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Incorrect valve clearance - Correct valve clearance needs to be set.
Faulty fuel injection pump - Install a new fuel pump or repair.

Diesel starts but then stops
Clogged air cleaner - Install new air cleaner element.
Clogged fuel filter - Clean or change the filter.
Poor fuel injection pump tightness - Look for any leaks of fuel pump, tighten it fast.
Defective or clogged fuel injectors - Replace fuel injectors.
Faulty fuel injection pump - Rebuild or replace pump.

Diesel shuts off while driving
Low coolant temperature - Warm up engine as required.
Fuel filter element clogging - Clean or change the filter.
Air in the fuel lines - Bleed the fuel lines.
Dirty or faulty injection nozzles - Clean or replace injection nozzles.
Improper setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.

Engine stops at idle
Incorrect low idle speed adjustment - Test and adjust.
Fuel injection pump is damaged - Rebuild or replace pump.
Defective fuel injectors - Replace fuel injectors.
Valve clearance is wrong - Adjust valve clearance.

Diesel power loss
Plugged air cleaner - Service or replace air cleaner.
Fuel injection nozzles are faulty or clogged - If necessary, replace with a new nozzle.
Uneven fuel injection pressure - Correct the pressure settings.
Valve out of adjustment - Need to adjust valve clearance.
Low idle speed adjustment is incorrect - Correct the settings.
Fuel lines or hoses clogging - Clean fuel hoses and lines.
Cylinder head gasket is defective - Replace the gasket as required.
Piston rings are worn or damaged - Change piston rings.

Engine overheating
Lack of coolant in cooling system - Add coolant and check the components of cooling system.
Lack of engine oil - Fill up the engine oil.
Clogged radiator fins or leaking radiator cap - Clean radiator or change cap.
Loose or damaged fan belt - Change the fan belt.
Engine overload - Load reducing required.

Insufficient oil pressure
Lack of oil - Fill up the engine oil.
Plugged engine oil filter - Clean or replace engine oil filter element.
Improper type of engine oil - Use oil of proper viscosity.
Excessive crankshaft bearing oil clearance - Replace bearings.
Defective oil pump - Inspect and change as required.

Abnormal engine knocking or noise
Engine oil insufficient - Fill up the engine oil.
Coolant temperature is low - Warm up engine as required.
Timing of fuel injection pump is incorrect - Set the fuel pump timing correctly.
Too low idle RPM - Adjust low idle speed.
Fuel injectors are faulty or clogged - Replace fuel injectors.
Misaligned or defective connecting rod - Need to replace or align the connecting rod.
Worn or scored pistons - Have pistons replaced.

Drive System Troubleshooting

Drive system won't operate in either direction
Hydraulic fluid level low - Fill the system to proper hydraulic fluid level.
Worn drive chain - Inspect drive chain and replace faulty components.
Relief valve is not working correctly - Rebuild or install a new relief valve.
Plugged hydraulic filter or suction line - Clean suction line or change hydraulic filter.
Foot or hand controls are damaged - Change or repair.
Drive pump or motor malfunction - Inspect and replace as necessary.

Low power
Hydraulic oil filter is plugged - Check, clean, or change as necessary.
Relief valve is opened or defective - Change or close relief valve.
Faulty or worn transmission components - Inspect and replace defective parts.
Stuck input drive shaft - Rebuild or change the shaft.
Air in the hydraulic system - Bleed air from system.

Drive system overheats
Hydraulic oil is insufficient - Fill the system to proper hydraulic oil level.
Dirty hydraulic fluid filter - Change hydraulic filter.
Relief valve is not working correctly - Repair or replace.
Hydraulic motor or drive pump failure - Replace or repair faulty component.
Oil cooler is clogged - Clean cooling fins as required.
Transmission overloading - Reduce the load.

Excessive noise
Oil viscosity is incorrect - Use the specified type of oil.
Air in the hydraulic system - Bleed air from system.
Defective drive pump or hydraulic motor - Replace or repair faulty component.
Defective or worn mechanical components of drive system - Check drive system and change faulty components.

Hydraulics Troubleshooting

Hydraulic system is overheated
Hydraulic pressure is incorrect - Adjust pressure correctly.
Unadjusted or defective main relief valve - Replace or set up the relief valve.
Dirty hydraulic oil - Hydraulic oil change required.
Lack of hydraulic oil - Add oil to the hydraulic system.
Hydraulic pump is worn - Install new pump or repair it.

Lift arm won't raise or lower
Lift controls are damaged - Repair or replace.
Hydraulic pump not working - Install new pump or repair it.
Hydraulic control valve malfunction - Repair or replace hydraulic valve.
Faulty hydraulic cylinder - Replace or repair boom cylinder.
Insufficient hydraulic oil - Fill the system to proper hydraulic oil level.

Bucket does not function
Bucket controls are faulty - Change or repair.
Hydraulic pump malfunction - Repair or change pump if required.
Damaged hydraulic control valve - Change or repair hydraulic valve.
Defective bucket cylinder - Install a new cylinder or repair it.
Hydraulic oil level low - Checking hydraulic oil level and add if necessary.

Slow boom or bucket action
Hydraulic pump is faulty - Check pump performance and change it if necessary.
Leaking hydraulic cylinder - Change cylinder piston seals.
Hydraulic fluid level low - Fill up the hydraulic fluid.
Hydraulic control valve is not set properly or defective - Repair or adjust correctly.
Hydraulic system loosing pressure - Correct setting is required.

Bucket or boom is working jerkily
Air leaks in hydraulic system - Bleed hydraulic system.
Dirty hydraulic oil filter - Replace or clean the filter.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Cylinder tube or rod scoring - Change worn component.

Hydraulic pump is excessively noisy
Hydraulic leaks or low oil level - Add hydraulic oil or correct system leaks.
Plugged hydraulic filter - Clean or replace the filter.
Clogged suction line - Need to service the suction line.
Pump sucks air - Remove air from hydraulics.
Worn pump parts - Rebuild or change hydraulic pump.

Electrical Troubleshooting

Battery will not charge
Corroded or loose electrical wire connections - Tighten or clean connections.
Battery terminal clamps are faulty - Terminal clamps should be changed.
Battery bad cell - Use a new battery.
Belt is loose or defective - Adjust belt tension or change the belt.

Starter cranks slow
Battery capacity is low - Low battery charging, charge as required.
Battery drains quickly - Service charging system or install new battery.
Battery terminals are corroded or wires are disconnected - Check cable connections and change or clean terminals.

Starter will not work
Battery is low or faulty - Recharge or change battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery voltage - Low battery charging, charge as required.
Starter motor failure - Starter needs to be changed.