Home / Skid Steer Loaders / Mustang Skid Steer Loaders / Mustang 2600R

Mustang 2600R Troubleshooting

The Mustang 2600R skid steer loader driveline system components: Yanmar 4TNV98CT-NMS four-cycle vertical four-cylinder direct injection turbocharged diesel engine with a rated power of 70.7 hp (52.7 kW), and 1-speed or 2-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 23.5 gal/min (89.6 l/min) or 35 gal/min (132.6 l/min). The Mustang 2600R is equipped with a radial-lift boom, 100H drive chains, and 12x16.5 HD standard tires. The skid steer has a maximum lift height of 123" (3125 mm) to hinge pin and dump height of 94" (2390 mm). The rated operating capacity is 2600 lbs (1180 kg), and tipping load is 5200 lbs (2360 kg).

Engine Troubleshooting

Engine starts hard or won't start
Air trapped in fuel system - Bleed air.
Fuel filter element is dirty - Filter maintenance required.
Dirty or faulty injection nozzles - Clean or change injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
The valve clearance is incorrect - Correct valve clearance.
Defective fuel injection pump - Rebuild or install a new injection pump.

Diesel starts and then shuts off
Air cleaner is clogged - Clean or change cleaner.
Fuel filter element is dirty - Clean the filter or install new filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Fuel injectors are faulty or clogged - Replace fuel injectors.
Fuel injection pump failure - Change pump or rebuild it.

Engine stops running suddenly
Engine not warmed up - Warm up to required temperature.
Fuel filter element is dirty - Install new filter element.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are dirty or defective - Replace injection nozzles.
Fuel injection pump timing is wrong - Set it up as required.

Engine stalls when idling
Wrong adjustment of low idle speed - Adjustment required.
Fuel injection pump is not working correctly - Repair or install new pump.
Fuel injectors are dirty or defective - Test and replace fuel injectors if necessary.
Improper valve clearance - Correct valve clearance needs to be set.

Lack of engine power
Air cleaner is dirty - Install new air cleaner element.
Fuel injection nozzles are dirty or defective - Test injection nozzles and change if necessary.
Fuel injection pressure is incorrect - Adjust pressure to proper level.
The valve clearance is incorrect - Adjust to proper valve clearance.
Low idle speed set incorrectly - Adjust as required.
Fuel hoses or lines are clogged - Clean fuel lines and hoses.
Leaking cylinder head gasket - Gasket should be replaced.
Leaking or defective piston rings - Install new piston rings.

Engine overheating
Insufficient coolant fluid - Fill the cooling system and check components for leaks or other faults.
Low engine oil level - Add oil to the engine crankcase.
Radiator fins are dirty or radiator cap is defective - Install new cap or clean radiator.
Loose or damaged fan belt - Replace as required.
Diesel engine is overloaded - Reduce engine load.

Oil pressure is insufficient
Engine oil level low - Add oil as required.
Dirty oil filter - Clean or change engine oil filter.
Improper type of engine oil - Use oil of correct viscosity.
Excessive crankshaft bearing oil clearance - Install new bearings.
Defective oil pump - Replace as required.

Abnormal engine noise or knocking
Engine oil insufficient - Checking oil level and add if necessary.
Engine is cold - Warm up to required temperature.
Wrong setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.
Incorrectly set low idle speed - Correct low idle adjustment.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Connecting rod is defective or not aligned - Alignment procedure or replacement is required.
Broken or worn pistons - Replace the pistons as required.

Drive System Troubleshooting

Drive system doesn't work in either direction
Low hydraulic oil level - Fill the system to proper hydraulic oil level.
Drive chain is worn - Check drive chain and change faulty components.
Worn or defective relief valve - Repair or change.
Suction line or hydraulic filter is dirty - Replace hydraulic filter or clean suction line.
Hand or foot controls malfunction - Inspect and repair if necessary.
Drive pump or motor is damaged - Inspect and change as required.

Loss of power
Hydraulic oil filter is clogged - Check, clean, or change as necessary.
Relief valve is open or worn - Change or close relief valve.
Transmission parts are defective or worn - Check and replace faulty components.
Input drive shaft is worn - Faulty drive shaft need to be replaced or repair.
Hydraulic system is leaking air - Need to bleed air.

Drive system keeps overheating
Hydraulic fluid level low - Checking hydraulic fluid level and add if necessary.
Dirty hydraulic fluid filter - Change hydraulic filter.
Faulty relief valve - Change or repair defective relief valve.
Drive pump or hydraulic motor malfunction - Replace or repair faulty component.
Hydraulic oil cooler is dirty - Cooling fins should be cleaned.
Drive system is overloaded - Load should be reduced.

Drive system makes excessive noise
Oil viscosity is wrong - Drain and refill with correct oil.
Air in the hydraulic system - Air bleeding is required.
Hydraulic motor or drive pump is defective - Inspect and change as required.
Defective or worn mechanical components of drive system - Inspect the parts for worn or defect and repair as needed.

Hydraulics Troubleshooting

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

Boom won't lower or raise
Lift controls are faulty - Repair or change.
Hydraulic pump malfunction - Change or repair hydraulic pump if required.
Hydraulic control valve malfunction - Change or repair hydraulic valve.
Hydraulic cylinder malfunction - Replace or repair boom cylinder.
Hydraulic fluid level low - Fill up the hydraulic fluid.

Bucket fails to tilt
Bucket tilt controls are defective - Replace or repair.
Hydraulic pump malfunction - Change or repair hydraulic pump if required.
Defective hydraulic control valve - Install a new valve or repair it.
Bucket cylinder is faulty - Repair or replace cylinder.
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.

Boom or bucket runs slowly
Faulty hydraulic oil pump - Check hydraulic pump flow and replace pump if necessary.
Leaking hydraulic cylinder - Repair leak by replacing the seals.
Insufficient hydraulic oil - Check and refill the hydraulic oil.
Hydraulic control valve is defective or set improper - Adjust properly or repair.
Hydraulic pressure loss - Set pressure correctly.

Bucket or boom jerks when working
Air in the hydraulic system - Bleed air from hydraulic system.
Dirty hydraulic oil filter element - Service or replace the hydraulic filter.
Hydraulic oil contamination - Fill up with fresh hydraulic oil.
Scratched cylinder rod or tube - Replace damaged component.

Excessive hydraulic pump noise
Insufficient oil level or leaking hydraulic system - Remedy hydraulic leakage or refill oil as necessary.
Clogged hydraulic filter - Change or clean oil filter.
Dirty suction line - Need to clean the suction line.
Air in hydraulic pump - Bleed air from hydraulics.
Pump parts are damaged - Rebuild or replace hydraulic pump.

Electrical Troubleshooting

Battery won’t charge
Corroded or loose cable connections - Tighten or clean connections.
Battery terminal clamps are faulty - Replace terminal clamps.
Defective battery - Battery replacement required.
Defective or loose belt - Adjust belt tension or change the belt.

Starter turns slow
Low battery voltage - Recharge the battery.
Battery will not hold charge - Battery needs service or replacement.
Disconnected battery cables or bad terminals - Connect cables correctly or replace terminals.

Starter does not work
Battery is drained or worn - Battery needs to be recharged or replaced.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery capacity - Battery needs to be recharged.
Starter motor failure - Starter needs to be changed.