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ASV RT-75 HD Troubleshooting
The
ASV RT75HD compact track loader driveline system components: a 171 cu.in (2.8L)
Cummins QSF-2.8 vertical 4-cylinder turbocharged diesel engine with a
rated power of 74 hp (55 kW) and 2-speed hydro transmission. The hydraulic
system has a high flow pump with a rated capacity of 35.7 gpm (135.1 lpm). The
system pressure is 3300 psi (227 bar). The RT-75 HD is equipped with radial-lift
loader boom, axial-piston drive pumps, and 18" (475 mm) rubber tracks with
embedded co-polymer cords. The loader has a maximum lift height is 125.5" (3190
mm) to hinge pin. The rated operating capacity is 2650 lbs (1202 kg), and
tipping load is 7570 lbs (3437 kg).
| Engine Troubleshooting |
Diesel engine hard to start or doesn't start
Air in the fuel lines - Bleed the fuel lines.
Fuel filter plugging - Service or replace the filter.
Fuel injection nozzles are damaged - If necessary, replace with a new nozzle.
Water in the fuel system - Change fuel and repair fuel system.
Improper valve clearance - Check and adjust as required.
Fuel injection pump is defective - Repair or install new pump.
Diesel starts but then stops
Plugged air filter - Clean or replace element.
Clogged fuel filter - Clean or replace the filter.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Damaged or clogged injectors - Test and replace fuel injectors if necessary.
Damaged fuel injection pump - Repair or install a new fuel pump.
Engine shuts off suddenly while running
Engine is not warmed up to required temperature - Warm up the engine as required.
Fuel filter element is dirty - Change the filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Dirty or damaged injection nozzles - Clean or replace injection nozzles.
Incorrect adjustment of fuel injection pump timing - Adjust as recommended.
Engine stops while idle
Wrong adjustment of low idle speed - Adjust the low idle speed.
Faulty fuel injection pump - Repair or install a new fuel pump.
Dirty or defective injectors - Inspect fuel injectors and change as required.
Valve clearance is out of adjustment - Correct valve clearance needs to be set.
Engine power loss
Plugged air cleaner - Clean or replace element.
Defective or clogged injection nozzle - Clean or replace injection nozzles.
Insufficient fuel injection pressure - Correct the pressure settings.
Valve clearance is out of adjustment - Need to adjust valve clearance.
Incorrect low idle setting - Adjust low idle speed.
Dirt in the fuel lines or hoses - Service fuel hoses and lines.
Cylinder head gasket defective - Install new cylinder head gasket.
Piston rings are leaking or defective - Replace the piston rings as required.
Engine overheated
Lack of engine coolant - Add coolant fluid and inspect the cooling system for leaks.
Engine oil level is low - Checking oil level and add if necessary.
Radiator fins are clogged or radiator cap is faulty - Clean radiator or change cap.
Fan belt slipping or worn - Replace the fan belt.
Engine is overloaded - Load reducing is recommended.
Oil pressure is low
Insufficient engine oil - Check and refill the oil.
Engine oil filter is plugged - Change or clean engine oil filter element.
Incorrect engine oil Use correct viscosity oil.
Excessive crankshaft bearing oil clearance - Change bearings.
Oil pump malfunction - Repair or change.
Abnormal engine knocking or noise
Engine oil insufficient - Add oil to the engine crankcase.
Low coolant temperature - Normalize the temperature by warming up the engine.
Wrong setting of fuel injection pump timing - Adjust the pump as required.
Low idle speed adjustment is incorrect - Test and adjust.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Connecting rod failure or misalignment - Connecting rod must be aligned or replaced.
Pistons are worn or broken - Have pistons replaced.
| Drive System Troubleshooting |
Drive system does not work in either direction
Hydraulic oil is insufficient - Need to add oil.
Track mechanism is jammed or defective - Repair or remove jamming.
Relief valve is not working correctly - Change or repair relief valve.
Plugged hydraulic filter or suction line - Check, clean, or change if necessary.
Defective or worn foot or hand controls - Change or repair.
Drive motor or pump is worn - Inspect and replace as necessary.
Machine will not drive straight or drives jerky
Track mechanism is jammed or defective - Repair or fix jamming.
Tracks are sagging or malfunctioning - Correct track sag with tensioning or repair tracks.
Foreign objects, debris, or dirt jammed in track frame - Remove debris or foreign objects and clean track frame.
Loss of power
Hydraulic oil filter is clogged - Replace hydraulic filter.
Opened or defective relief valve - Close or replace relief valve.
Transmission parts are worn or defective - Check and change faulty components.
Input drive shaft failure - Repair or install a new drive shaft.
Hydraulic system is leaking air - Bleed hydraulic system.
Drive system overheating
Insufficient hydraulic fluid - Add fluid as required.
Dirty hydraulic fluid filter - Change or clean hydraulic filter.
Worn or damaged relief valve - Repair or install a new relief valve.
Worn hydraulic motor or drive pump - Inspect and replace as necessary.
Plugged hydraulic oil cooler - Clean cooling fins as required.
Overloaded drive system - Reduce loading.
Excessive noise
Oil viscosity is wrong - Use the specified type of oil.
Air in hydraulic system - Bleed air from hydraulic system.
Drive pump or hydraulic motor malfunction - Inspect and replace as necessary.
Mechanical parts of drive system are worn or damaged - Inspect the components for worn or defect and repair as required.
| Hydraulics Troubleshooting |
Hydraulic system overheated
Hydraulic pressure incorrectly adjusted - Correct adjustment is required.
Main relief valve is damaged or adjusted improperly - Set up or change the relief valve.
Hydraulic oil is contaminated - Change hydraulic oil.
Lack of hydraulic oil - Add oil to the hydraulic system.
Hydraulic pump is worn - Replace or repair pump if necessary.
Boom won't lower or raise
Lift controls failure - Replace or repair.
Hydraulic pump malfunction - Repair or replace pump if necessary.
Hydraulic control valve failure - Replace or repair the valve.
Hydraulic cylinder not working - Install a new boom cylinder or repair it.
Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.
Bucket fails to tilt
Bucket tilt controls are defective - Inspect and repair if necessary.
Damaged hydraulic oil pump - Replace or repair pump if necessary.
Faulty hydraulic control valve - Replace or repair the valve.
Defective bucket cylinder - Replace or repair cylinder.
Hydraulic oil is insufficient - Need to add oil.
Boom or bucket is moving slowly
Faulty hydraulic oil pump - Check pump capacity and change if necessary.
Hydraulic cylinder oil leakage - Change cylinder piston seals.
Insufficient hydraulic fluid - Fill the system to proper hydraulic fluid level.
Hydraulic control valve is defective or set improper - Repair or set correctly.
Hydraulic pressure is low - Set pressure correctly.
Lift arm or bucket is moving jerkily
Hydraulic system is leaking air - Need to bleed air.
Hydraulic oil filter is clogged - Clean or replace the filter.
Dirty hydraulic oil - Fill up with fresh hydraulic oil.
Scratched cylinder rod or tube - Replace failed component.
Excessive hydraulic pump noise
Low oil level or hydraulic leaks - Remedy hydraulic leakage or refill oil as necessary.
Dirty hydraulic filter - Clean or install new filter.
Suction line is dirty - Suction line must be serviced.
Air in hydraulic pump - Remove air from hydraulics.
Faulty pump parts - Rebuild or replace hydraulic pump.
| Electrical Troubleshooting |
Battery won’t charge
Electrical wire connections are corroded or loose - Tighten or service cable connections.
Battery terminal connectors are faulty - Terminal connectors need to be changed.
Battery faulty cell - Change the battery.
Belt is damaged or loose - Adjust belt tension or replace belt.
Starter turns slow
Low battery output - Low battery charging, charge as required.
Battery will not hold charge - Service battery or replace it.
Wires are disconnected or battery terminals are corroded - Connect wires properly or change terminals.
Starter is not cranking
Battery is discharged or defective - Recharge or change battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Battery voltage is low - Battery is drained, charge it.
Starter motor is damaged - Starter should be replaced.
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| COMPACT TRACK LOADERS SPECIFICATIONS |