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| Home / Compact Track Loaders / Bobcat Compact Track Loaders / Bobcat MT50 |
Bobcat MT50 Troubleshooting
The
Bobcat MT50 mini track loader driveline system components: a 43.9 cu.in (0.7L)
Kubota D722 4-cycle vertical 3-cylinder indirect injection liquid-cooled diesel
engine with a rated power of 19 hp (14 kW), and single-speed hydro
transmission. The hydraulic system has a pump with a rated flow of 13.4 gpm
(50.5 lpm). The system pressure is 2600 psi (180 bar). The Bobcat MT50 is
equipped with a tilt steering, 7" (180 mm) rubber tracks, and independent
hydrostatic brakes. The loader has a maximum lift height of 74.8" (1900 mm) to
hinge pin and dump height of 55.1" (1400 mm). The rated operating capacity is
750 lbs (340 kg), and tipping load is 1500 lbs (680 kg).
| Engine Troubleshooting |
Engine starts up hard or will not start
Air in the fuel pipes - Bleed the fuel pipes.
Fuel filter plugged - Replace the filter element.
Damaged or dirty injection nozzles - Clean or change injection nozzles.
Water or dirt in fuel system - Drain, flush, and service the system.
Valve clearance is not correct - Check and adjust.
Faulty fuel injection pump - Repair or install new pump.
Diesel starts but immediately stops
Air filter is plugged - Clean or change.
Dirty fuel filter - Replace filter element.
Fuel injection pump has loose connections - Tighten the connections.
Clogged or defective injectors - Test and replace fuel injectors if necessary.
Fuel injection pump failure - Replace or rebuild injection pump.
Engine stalls during operation
Engine not warmed up - Warm up engine as required.
Fuel filter element is clogged - Clean or change the filter.
Air in fuel tank - Bleed fuel tank.
Fuel injection nozzles are clogged or faulty - Change fuel injection nozzles.
Incorrect adjustment of fuel injection pump timing - Check the fuel injection pump timing adjustment.
Engine stops when idle
Incorrect low idle speed adjustment - Adjust as required.
Damaged fuel injection pump - Rebuild or change fuel pump.
Fuel injectors are dirty or defective - Test and replace fuel injectors if necessary.
The valve clearance is not adjusted - Adjust valve clearance.
Engine lacks power
Air cleaner is dirty - Service or replace air cleaner.
Clogged or defective injection nozzles - Inspect nozzles and replace if necessary.
Improper fuel injection pressure - Correct the pressure settings.
Valve clearance is not correct - Need to adjust valve clearance.
Low idle speed setting is incorrect - Adjust the low idle speed.
Fuel lines or hoses are dirty - Clean fuel hoses and lines.
Cylinder head gasket defective - Gasket should be replaced.
Piston rings are leaking or defective - Change piston rings.
Engine overheated
Low engine coolant - Fill radiator to proper level and check components for faults.
Insufficient engine oil - Checking oil level and add if necessary.
Defective radiator cap or clogged radiator core - Change cap or clean radiator.
Damaged or worn fan belt - Install new fan belt.
Engine overloaded - Load reducing is recommended.
Oil pressure is low
Insufficient engine oil - Add oil as required.
Oil filter is dirty - Replace or service engine oil filter.
Different type of engine oil - Use proper viscosity oil.
Crankshaft bearing has incorrect oil clearance - Bearing replacement required.
Worn oil pump - Replace as required.
Engine noises or knocks
Not enough engine oil - Add oil to the engine crankcase.
Engine is not preheated - Warm up the engine.
Incorrect adjustment of fuel injection pump timing - Set up as recommended.
Incorrect low idle speed adjustment - Correct the settings.
Defective fuel injectors - Change or clean fuel injectors.
Misaligned or faulty connecting rod - Connecting rod needs to be aligned or changed.
Pistons are broken or worn - Install new pistons.
| Drive System Troubleshooting |
Machine is not moving forward or backward
Hydraulic fluid is insufficient - Checking hydraulic fluid level and add if necessary.
Damaged or jammed track mechanism - Repair or remove jamming.
Damaged input drive shaft - Rebuild or change.
Defective or worn relief valve - Repair or replace relief valve.
Hydraulic filter or suction line is plugged - Change hydraulic filter or service suction line.
Damaged or worn hand or foot controls - Change or repair.
Defective drive pump or motor - Check and repair if required.
Machine won't move straight or moves jerky
Track mechanism is jammed or defective - Repair or fix jamming.
Tracks are faulty or improperly tensioned - Adjust track tension as required or replace tracks.
Track frame is blocked with debris, dirt, or foreign objects - Clean undercarriage track frame, remove foreign objects and debris.
Lack of power
Dirty hydraulic oil filter - Replace hydraulic filter.
Relief valve is worn or opened - Close or change relief valve.
Transmission parts are worn or defective - Check and replace faulty components.
Input drive shaft failure - Faulty drive shaft need to be replaced or repair.
Air in the hydraulic system - Bleed air from system.
Overheated drive system
Insufficient hydraulic oil - Check and refill the hydraulic oil.
Hydraulic fluid filter is clogged - Replace or service hydraulic filter.
Worn or defective relief valve - Repair or replace.
Defective drive pump or hydraulic motor - Change or repair faulty component.
Clogged hydraulic oil cooler - Cooling fins should be cleaned.
Drive system overload - Load should be reduced.
Drive system is noisy
Improper oil viscosity - Drain and refill with proper oil.
Hydraulic system is leaking air - Air bleeding is required.
Drive pump or hydraulic motor malfunction - Change or repair faulty component.
Mechanical components of drive system are damaged or worn - Inspect drive system and replace faulty components.
| Hydraulics Troubleshooting |
Hydraulic system has overheating
Incorrect hydraulic pressure setting - Adjust it correctly.
Main relief valve is faulty or misadjusted - Adjust relief valve or change if required.
Hydraulic fluid is contaminated - Fill up with fresh hydraulic fluid.
Not enough hydraulic oil in the system - Fill up the hydraulic oil.
Hydraulic pump is worn - Repair or install new hydraulic pump.
Lift arm fails to drop or lift
Lift controls malfunction - Change or repair.
Defective hydraulic pump - Repair or install new hydraulic pump.
Defective hydraulic control valve - Repair or replace hydraulic valve.
Hydraulic cylinder is broken - Repair or change hydraulic cylinder.
Low hydraulic fluid level - Fill up the hydraulic fluid.
Bucket can't tilt
Bucket tilt controls are damaged - Repair or replace.
Hydraulic pump malfunction - Repair or replace pump if necessary.
Hydraulic control valve is defective - Repair or change hydraulic valve.
Hydraulic bucket cylinder is defective - Repair or replace cylinder.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.
Boom or bucket moves slowly
Hydraulic pump is defective - Check pump flow and install new pump if necessary.
Hydraulic cylinder oil leakage - Cylinder seals need to be replaced.
Hydraulic oil is insufficient - Fill the system to proper hydraulic oil level.
Damaged or incorrect adjusted hydraulic control valve - Repair or set properly.
Hydraulic pressure is low - Hydraulic pressure must be set correctly.
Bucket or boom is jerky
Air trapped in hydraulic system - Bleed air from system.
Plugged hydraulic oil filter - Clean or change the filter.
Dirty hydraulic fluid - Change hydraulic fluid.
Scored cylinder tube or rod - Change failed component.
Hydraulic pump is noisy
Hydraulic leaks or low oil level - Repair hydraulic leaks or add oil as required.
Plugged hydraulic filter - Service or replace hydraulic filter.
Dirty suction line - Need to clean the suction line.
Pump is sucking air - Remove air from hydraulics.
Pump parts are worn out - Replace or rebuild the pump.
| Electrical Troubleshooting |
Battery does not charge
Wiring connections are loose or corroded - Clean or tighten wiring connections.
Battery terminal clamps are defective - Replace terminal clamps.
Dead cell in battery - Replace the battery.
Defective or loose belt - Change belt or adjust belt tension.
Starter turning slow
Low battery capacity - Charge the battery.
Battery will not hold charge - Service charging system or install new battery.
Faulty battery terminals or disconnected cables - Connect wiring correctly or install new terminals.
Starter motor won't turn
Battery is discharged or worn - Change or recharge battery.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Low battery output voltage - Battery needs to be recharged.
Starter motor failing - Starter should be replaced.
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| COMPACT TRACK LOADERS SPECIFICATIONS |