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ASV VS-75 Troubleshooting

The ASV VS-75 skid steer loader is powered by 177 cu.in (2.9L) Deutz TD2.9L4 vertical four-cylinder turbocharged diesel engine with a rated power of 74 hp (55 kW) at 2800 rpm. The ASV VS-75 is equipped with a two-speed hydrostatic transmission, 100 ANSI continuous roller chains, and 12x16.5 standard tires. The hydraulic system has a gear pump with fluid flow rate of 26 gpm (98.4 lpm) or 30.9 gpm (117 lpm). The hydraulic pressure is 3335 psi (230 bar). The skid steer loader has a rated operating capacity of 3500 lbs (1587 kg) and tipping load of 7000 lbs (3175 kg). The boom lifting force is 6325 lbs (2828 kg), and bucket breakout force is 5920 lbs (2685 kg).

Engine Troubleshooting

Engine difficult to start or will not start
Air in the fuel lines - Bleed the fuel lines.
Fuel filter element is dirty - Change filter element.
Defective or clogged injection nozzle - Inspect nozzles and replace if necessary.
Water or dirt in fuel system - Drain, flush, and service the system.
The valve clearance is incorrect - Check and adjust.
Faulty fuel injection pump - Repair or install new pump.

Diesel starts but then stops
Air filter is dirty - Install new air filter element.
Fuel filter plugged - Change filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Clogged or defective injectors - Replace or clean fuel injectors.
Fuel injection pump is broken - Rebuild or replace pump.

Engine stops unexpectedly during operation
Coolant temperature is low - Warm up engine as required.
Fuel filter element is dirty - Replace filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are damaged - Check and replace nozzles if required.
Wrong setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.

Engine stops at low idle speed
Too low idle RPM - Test and adjust.
Defective fuel injection pump - Change pump or rebuild it.
Dirty or defective injectors - Change or clean fuel injectors.
Incorrect valve clearance - Correct valve clearance.

Engine power is too low
Clogged air cleaner - Install new air cleaner element.
Defective injection nozzle - Test injection nozzles and change if necessary.
Uneven fuel injection pressure - Adjust to proper pressure.
Valve clearance is out of adjustment - Adjustment procedure required.
Low idle speed set incorrectly - Adjust the low idle speed.
Restricted fuel lines or hoses - Clean fuel system hoses and lines.
Cylinder head gasket is damaged - Cylinder-head gasket replacement required.
Piston rings are broken or leaking - Install new piston rings.

Engine overheated
Lack of engine coolant - Add coolant fluid and inspect the cooling system for leaks.
Low engine oil level - Fill the crankcase with engine oil.
Clogged radiator fins or leaking radiator cap - Replace cap or clean radiator.
Fan belt slipping or worn - Belt change is required.
Diesel engine overloaded - Reduce load on the engine.

Low oil pressure
Lack of oil - Check oil level and add oil as required.
Oil filter clogging - Service or change engine oil filter element.
Wrong oil viscosity - Drain and refill with oil of correct grade and viscosity.
Excessive main bearing oil clearance - Bearing replacement required.
Oil pump is damaged - Install a new pump.

Abnormal engine knocking or noise
Engine oil level is low - Check oil level and add oil as required.
Engine not warmed up - Warm up engine as required.
Wrong setting of fuel injection pump timing - Set up as recommended.
Low idle speed setting is not correct - Test and adjust.
Dirty or defective injectors - Clean fuel injectors or change it.
Connecting rod misalignment or failure - Need to replace or align the connecting rod.
Pistons are worn or broken - Have pistons replaced.

Drive System Troubleshooting

Drive system doesn't operate in one direction or either direction
Low hydraulic fluid level - Fill up the hydraulic fluid.
Damaged drive chain - Check drive chain and change defective parts.
Worn input drive shaft - Repair or replace drive shaft.
Defective or worn relief valve - Relief valve need to be replaced or repair.
Suction line or hydraulic filter is plugged - Check, clean, or change if necessary.
Foot or hand controls are damaged - Repair or change.
Damaged drive pump or motor - Change or repair faulty component.

Power is too low
Dirty hydraulic oil filter - Check, clean, or replace as required.
Relief valve is worn or opened - Close or change relief valve.
Faulty or worn transmission components - Inspect and replace defective parts.
Input drive shaft is defective - Service or change faulty drive shaft.
There is air in the hydraulic system - Bleed air from system.

Drive system overheats
Hydraulic oil level is low - Check and refill the hydraulic oil.
Plugged hydraulic fluid filter - Replace hydraulic filter.
Relief valve is damaged or worn - Relief valve need to be replaced or repair.
Damaged drive pump or hydraulic motor - Repair or change faulty component.
Plugged hydraulic oil cooler - Clean cooling fins as required.
Transmission overloading - Reduce drive system load.

Drive system makes excessive noise
Wrong oil viscosity - Use oil of correct viscosity.
There is air in the hydraulic system - Bleed air from system.
Drive pump or hydraulic motor is damaged - Replace or repair faulty component.
Worn or damaged mechanical components of drive system - Inspect drive system and replace faulty parts.

Hydraulics Troubleshooting

Hydraulic system overheating
Hydraulic pressure is not correct - Adjust pressure correctly.
Main relief valve malfunction or improper adjustment - Adjust or change relief valve.
Hydraulic oil is contaminated - Hydraulic oil change required.
Hydraulic oil level is low - Check oil level and add hydraulic oil as required.
Worn hydraulic oil pump - Change or repair hydraulic pump if required.

Boom does not raise or lower
Faulty lift controls - Replace or repair.
Hydraulic pump failure - Repair or replace pump if necessary.
Hydraulic control valve is faulty - Repair or replace the valve.
Damaged hydraulic cylinder - Repair or install a new lift cylinder.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.

Bucket can't tilt
Faulty bucket tilt controls - 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.
Faulty hydraulic bucket cylinder - Repair or change cylinder.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.

Bucket or lift arm is working slowly
Hydraulic pump is faulty - Flow-rate hydraulic pump and replace pump if necessary.
Hydraulic cylinder oil leakage - Install new cylinder seals.
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Hydraulic control valve is not set properly or defective - Repair or set properly.
Low hydraulic pressure - Adjust it correctly.

Jerky operation of the bucket or boom
Air in hydraulic system - Bleed hydraulic system.
Hydraulic oil filter is dirty - Clean or change the filter.
Dirty hydraulic oil - Fill up with fresh hydraulic oil.
Cylinder rod or tube is scuffed - Change worn component.

Hydraulic pump is noisy
Hydraulic leakage or lack of oil - Remedy hydraulic leakage or refill oil as necessary.
Clogged hydraulic filter - Replace or clean the filter.
Suction line clogging - Suction line must be serviced.
Air in hydraulic pump - Need to bleed air.
Pump parts are faulty - Replace or rebuild the pump.

Electrical Troubleshooting

Battery does not charge
Loose or corroded cable connections - Service or tighten connections.
Faulty battery terminal connectors - Terminal connectors need to be changed.
Battery is worn - Battery change required.
Defective or loose belt - Belt needs to be adjusted or changed.

Starter cranks slow
Battery power is low - Recharge the battery.
Battery is not holding charge - Service battery or replace it.
Wires are disconnected or battery terminals are corroded - Check cable connections and change or clean terminals.

Starter motor is not working
Battery is discharged or defective - Change or recharge battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery output voltage - Battery is drained, charge it.
Defective starter motor - Starter needs to be replaced.