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ASV RT120F Troubleshooting
The
ASV RT-120 Forestry compact track loader is powered by 232 cu.in (3.8L) Cummins
QSF3.8 vertical 4-cylinder turbocharged intercooled diesel engine with a
rated power of 120 hp (89.5 kW) at 2800 rpm. The ASV RT120F is equipped with a
two-speed hydrostatic transmission, radial-lift loader boom, 20" (505 mm) rubber
tracks, and elevated track drive sprockets. The hydraulic system has an
axial-piston pump with fluid flow rate of 20 gpm (75.7 lpm). The hydraulic
pressure is 3300 psi (227 bar). The track loader has a rated operating capacity
of 3745 lbs (1700 kg) and tipping load of 10700 lbs (4855 kg). The maximum lift
height is 125" (3175 mm) to hinge pin.
| Engine Troubleshooting |
Engine hard to start or will not start
There is air in the fuel system - Bleed the system.
Fuel filter element is dirty - Filter maintenance required.
Dirty or faulty injection nozzles - Clean or replace injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump is not working correctly - Replace injection pump or repair it.
Engine starts and immediately shuts off
Air filter is dirty - Change or service air filter element.
Fuel filter element is clogged - Change the filter element.
Fuel injection pump is leaking - Repair any leaks.
Fuel injectors are faulty or clogged - Test and replace fuel injectors if necessary.
Fuel injection pump malfunction - Install a new fuel pump or repair.
Engine stalls while running
Engine is not preheated - Warm up the engine as required.
Dirty fuel filter - Clean the filter or install new filter element.
Air in the fuel system - Air bleeding.
Fuel injection nozzles fault - Install a new kit of correctly balanced nozzles.
Fuel injection pump timing is wrong - Use the correct fuel injection pump timing adjustment.
Engine stalls at low idle speed
Improperly adjusted low idle speed - Correct low idle settings.
Fuel injection pump is not working correctly - Replace or repair injection pump.
Clogged or defective injectors - Change or clean fuel injectors.
Valve out of adjustment - Need to adjust valve clearance.
Loss of engine power
Dirty air filter - Clean or change filter.
Faulty or dirty injection nozzles - Install a new kit of correctly balanced nozzles.
Fuel injection pressure is wrong - Test fuel injection pressure and adjust it correctly.
Excessive valve clearance - Adjust valve clearance.
Incorrectly adjusted low idle speed - Need to adjust idle speed.
Dirty fuel lines or hoses - Clean fuel hoses and lines.
Cylinder-head gasket is broken - Cylinder-head gasket replacement required.
Piston rings are defective or leaking - Replace piston rings.
Engine overheats
Insufficient coolant - Refill to the correct level and inspect system for leaks.
Engine oil insufficient - Fill up the engine oil.
Clogged radiator fins or damaged radiator cap - Clean radiator or install new cap.
Damaged or worn fan belt - Replace as required.
Engine is under excessive load - Load reducing required.
Oil pressure is low
Engine oil insufficient - Fill crankcase to proper oil level.
Dirty oil filter - Clean or change engine oil filter.
Incorrect engine oil Use the specified type of engine oil.
Incorrect oil clearance in crankshaft bearing - Bearings need to be reinstalled.
Oil pump failure - Replace as required.
Engine knocking or noise
Engine oil level low - Fill the crankcase with engine oil.
Engine not warmed up - Warm up the engine as required.
Improper fuel injection timing - Set it up as required.
Wrong adjustment of low idle speed - Adjust the low idle speed.
Fuel injectors are dirty or defective - Test and replace fuel injectors if necessary.
Connecting rod is not aligned or worn - Need to align or replace the connecting rod.
Piston wear or scoring - Install new pistons.
| Drive System Troubleshooting |
Drive system won't operate in either direction
Insufficient hydraulic oil - Check and refill the hydraulic oil.
Blocked or defective track mechanism - Correct blockage or repair tracks.
Relief valve malfunction - Repair or install a new relief valve.
Suction line or hydraulic filter is clogged - Check, clean, or replace if required.
Foot or hand controls are faulty - Repair or replace.
Drive pump or motor is damaged - Replace or repair faulty component.
Machine does not drive straight or drives jerky
Undercarriage tracks are defective or jammed - Repair or remedy jamming.
Sagging or faulty tracks - Replace tracks or adjust track sag with tension.
Undercarriage track frame is plugged with dirt, debris, or foreign objects - Clean undercarriage track frame, remove foreign objects and debris.
Loss of power
Clogged hydraulic oil filter - Change or clean hydraulic filter.
Defective or open relief valve - Close or change relief valve.
Faulty or damaged transmission components - Check and change defective components.
Input drive shaft is damaged - Repair or replace faulty drive shaft.
Air in hydraulic system - Bleed air from hydraulic system.
Drive system is overheated
Low hydraulic oil level - Fill the system to proper hydraulic oil level.
Plugged hydraulic fluid filter - Change hydraulic filter.
Relief valve is defective - Repair or replace.
Defective drive pump or hydraulic motor - Check and repair if required.
Hydraulic oil cooler is plugged - Clean the cooling fins.
Overloaded drive system - Reduce drive system load.
Drive system is excessively noisy
Wrong oil viscosity - Use the specified type of oil.
Air leaks in hydraulic system - Bleed air from system.
Hydraulic motor or drive pump failure - Repair or change faulty component.
Mechanical components of drive system are worn or damaged - Inspect the parts for worn or defect and repair as needed.
| Hydraulics Troubleshooting |
Hydraulic system overheated
Incorrect hydraulic pressure setting - Correct adjustment is required.
Unadjusted or defective main relief valve - Adjust the valve or replace if necessary.
Dirty hydraulic oil - The oil must be changed.
Lack of hydraulic fluid - Add fluid to the hydraulic system.
Defective hydraulic pump - Repair or install new hydraulic pump.
Lift arm won't raise or lower
Lift controls malfunction - Inspect and repair if necessary.
Hydraulic pump not working - Replace or repair pump if necessary.
Hydraulic control valve is faulty - Repair or change the valve.
Hydraulic cylinder is broken - Change or repair lift cylinder.
Hydraulic fluid level low - Add fluid as required.
Bucket fails to tilt
Faulty bucket tilt controls - Check and repair as required.
Hydraulic pump failure - Install new pump or repair it.
Hydraulic control valve failure - Repair or change the valve.
Broken bucket cylinder - Repair or install a new cylinder.
Low hydraulic oil level - Fill the system to proper hydraulic oil level.
Boom or bucket moves slowly
Hydraulic pump is faulty - Check pump performance and change it if necessary.
Leaking hydraulic cylinder - Correct leakage by changing the seals.
Low hydraulic oil level - Check and refill the hydraulic oil.
Defective or not adjusted hydraulic control valve - Set correctly or repair.
Low hydraulic pressure - Correct setting is required.
Bucket or boom is working jerkily
Air leaks in hydraulic system - Bleed air from system.
Dirty hydraulic oil filter element - Service or replace the hydraulic filter.
Dirty hydraulic fluid - The fluid must be changed.
Cylinder tube or rod is scored - Change worn component.
Hydraulic pump makes excessive noise
Hydraulic leakage or low oil level - Repair hydraulic leaks or add oil as required.
Plugged hydraulic filter - Clean or change the filter.
Dirty suction line - Suction line needs to be cleaned.
Pump sucks air - Air bleeding is required.
Pump components are worn out - Install new hydraulic pump or rebuild it.
| Electrical Troubleshooting |
Battery is not charging
Electrical wire connections are loose or corroded - Tighten or service connections.
Electrical terminal connectors are defective - Terminal connectors should be replaced.
Battery is worn - Use a new battery.
Loose or damaged belt - Adjust belt tension or change the belt.
Starter cranks slowly
Low battery capacity - Charge the battery.
Battery won’t hold charge - Battery needs service or replacement.
Faulty battery terminals or disconnected cables - Check wiring and clean or replace terminals.
Starter will not crank
Battery is drained or worn - Need to charge or replace the battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery voltage - Low battery charging, charge as required.
Faulty starter motor - Repair or replace starter.
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| COMPACT TRACK LOADERS SPECIFICATIONS |