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ASV RS50 Troubleshooting

The ASV RS50 skid steer loader is powered by 135 cu.in (2.2L) Perkins 404D-22 four-cylinder indirect injection naturally aspirated diesel engine with a rated power of 50 hp (37.3 kW) at 2800 rpm. The ASV RS-50 is equipped with a two-speed hydrostatic transmission, 80 ANSI continuous roller chains, and 10x16.5 standard tires. The hydraulic system has a gear pump with fluid flow rate of 17.1 gpm (65 lpm). The hydraulic pressure is 3335 psi (230 bar). The skid steer loader has a rated operating capacity of 1650 lbs (748 kg) and tipping load of 3300 lbs (1497 kg). The boom lifting force is 4750 lbs (2155 kg), and bucket breakout force is 4750 lbs (2155 kg).

Engine Troubleshooting

Engine starts up hard or doesn't start
Air in the fuel pipes - Bleed the fuel pipes.
Fuel filter plugging - Replace filter element.
Fuel injection nozzles are damaged - Inspect nozzles and replace if necessary.
Water in the fuel system - Change fuel and repair fuel system.
Incorrect valve clearance - Correct valve clearance needs to be set.
Fuel injection pump is not operating properly - Repair or install a new fuel pump.

Diesel starts and stalls immediately
Air filter is dirty - Clean or change.
Fuel filter plugging - Change or clean the filter element.
Fuel injection pump is leaking - Repair any leaks.
Fuel injectors are dirty or defective - Replace or clean fuel injectors.
Fuel injection pump is defective - Repair or change injection pump.

Engine shuts off suddenly while running
Engine is not fully warmed up - Warm up engine as required.
Fuel filter element is dirty - Replace filter element.
Air in fuel tank - Bleed fuel tank.
Defective or clogged injection nozzle - Change fuel injection nozzles.
Improper setting of fuel injection pump timing - Adjust the pump as required.

Engine stops when idling
Incorrect low idle speed adjustment - Need to adjust idle speed.
Fuel injection pump malfunction - Replace or repair injection pump.
Fuel injectors are dirty or defective - Test and replace fuel injectors if necessary.
The valve clearance is not adjusted - Adjustment procedure required.

Engine loses power
Dirty air filter - Clean or change filter.
Fuel injection nozzles are damaged or dirty - If necessary, replace with a new nozzle.
Improper fuel injection pressure - Adjust to proper pressure.
Improper valve clearance - Adjust valve clearance according to specifications.
Too low idle RPM - Adjust low idling as recommended.
Dirt in the fuel lines or hoses - Clean fuel lines and hoses.
Damaged cylinder-head gasket - Gasket should be replaced.
Piston rings are broken or leaking - Change piston rings.

Engine is overheated
Not enough coolant - Add coolant and check the components of cooling system.
Engine oil insufficient - Need to add engine oil.
Clogged radiator core or leaking radiator cap - Clean radiator or replace cap.
Fan belt is broken or worn - Change as required.
Engine is overloaded - Load reducing is recommended.

Low oil pressure
Lack of oil - Add oil to the engine crankcase.
Engine oil filter is plugged - Clean or change engine oil filter.
Incorrect oil viscosity - Use the specified type of engine oil.
Excessive crankshaft bearing oil clearance - Change bearings.
Oil pump is worn or damaged - Replace as required.

Engine knocking sound or abnormal noise
Engine oil level low - Fill up the engine oil.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Timing of fuel injection pump is incorrect - Adjust fuel injection pump as required.
Improperly adjusted low idle speed - Adjust the low idle speed.
Damaged or clogged injectors - Replace or clean fuel injectors.
Connecting rod is not aligned or defective - Connecting rod needs to be replaced or aligned.
Pistons are broken or worn - Install new pistons.

Drive System Troubleshooting

Drive system will not operate in either direction
Hydraulic oil level is low - Check and refill the hydraulic oil.
Worn drive chain - Inspect drive chain and replace faulty components.
Input drive shaft is damaged - Rebuild or change.
Faulty relief valve - Service or change relief valve.
Suction line or hydraulic filter is dirty - Check, clean, or change if necessary.
Foot or hand controls are damaged - Change or repair.
Drive motor or pump is worn - Check and repair if required.

Reduced power
Hydraulic oil filter is dirty - Check, clean, or replace as required.
Opened or defective relief valve - Change or close relief valve.
Faulty or damaged transmission components - Inspect and change defective parts.
Input drive shaft is defective - Replace or service the drive shaft.
Air in the hydraulic system - Bleed air from system.

Overheated drive system
Hydraulic fluid level low - Add fluid as required.
Clogged hydraulic fluid filter - Replace hydraulic filter.
Defective relief valve - Repair or replace relief valve.
Hydraulic motor or drive pump failure - Inspect and change as required.
Plugged hydraulic oil cooler - Clean the cooling fins.
Drive system overload - Reduce loading.

Excessive noise
Oil viscosity is wrong - Use proper oil viscosity.
Air trapped in hydraulic system - Bleed hydraulic system.
Hydraulic motor or drive pump is worn - Inspect and change as required.
Defective or worn mechanical components of drive system - Inspect the components for defect or damage and repair as needed.

Hydraulics Troubleshooting

Hydraulic system is overheated
Hydraulic pressure is not adjusted correctly - Hydraulic pressure must be set correctly.
Main relief valve is defective or unadjusted - Adjust relief valve or change if required.
Hydraulic oil is contaminated - Change hydraulic oil.
Hydraulic oil level is low - Check oil level and add hydraulic oil as required.
Worn hydraulic oil pump - Repair or install new hydraulic pump.

Lift arm fails to drop or lift
Lift controls are defective - Change or repair.
Hydraulic pump not working - Repair or install new hydraulic pump.
Damaged hydraulic control valve - Change or repair hydraulic valve.
Hydraulic cylinder is defective - Install a new boom cylinder or repair it.
Hydraulic fluid level low - Add fluid as required.

Bucket does not tilt
Defective bucket controls - Replace or repair.
Hydraulic pump malfunction - Repair or replace pump if necessary.
Hydraulic control valve failure - Repair or change the valve.
Broken bucket cylinder - Repair or replace cylinder.
Low hydraulic fluid level - Add fluid as required.

Bucket or lift arm runs slowly
Hydraulic pump is worn - Flow-rate hydraulic pump and replace pump if necessary.
Hydraulic cylinder oil leakage - Correct leakage by changing the seals.
Low hydraulic fluid level - Fill the system to proper hydraulic fluid level.
Defective or not adjusted hydraulic control valve - Repair or set properly.
Hydraulic pressure has dropped - Adjust pressure as required.

Lift arm or bucket jerks when working
Hydraulic system is leaking air - Need to bleed air.
Hydraulic oil filter element clogging - Clean or replace the filter.
Hydraulic oil contamination - Change hydraulic oil.
Scored cylinder tube or rod - Change defective component.

Excessive hydraulic pump noise
Insufficient oil level or leaking hydraulic system - Correct hydraulic leaks or top up oil as needed.
Plugged hydraulic filter - Replace or clean the filter.
Dirty suction line - Clean suction line as required.
Pump is sucking air - Remove air from hydraulics.
Pump components are worn out - Install new hydraulic pump or rebuild it.

Electrical Troubleshooting

Battery won’t charge
Loose or corroded electrical wiring connections - Tighten or service connections.
Faulty electrical terminal connectors - Change terminal connectors.
Defective battery - Install a new battery.
Defective or loose belt - Belt needs to be adjusted or changed.

Starter turns slow
Battery power is low - Low battery charging, charge as required.
Battery is not holding charge - Service battery or change it.
Battery cables are disconnected or terminals are faulty - Check battery wires and service or replace terminals.

Starter motor won't turn
Battery is low or faulty - Replace or charge as required.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Low battery voltage - Battery is drained, recharge it.
Faulty starter motor - Starter should be changed.