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Kubota SVL90-2 Troubleshooting
The
Kubota SVL90-2 compact track loader driveline system components: Kubota
V3800-CR-TE4 4-cycle 4-cylinder turbocharged diesel engine with a rated power of
92 hp (68.5 kW), and 2-speed hydrostatic transmission. The hydraulic system has
a pump with a rated flow of 25 gal/min (95 l/min) or 36.4 gal/min (138 l/min).
The Kubota SVL90-2 is equipped with a vertical-lift boom, self-leveling bucket,
triple flange lower track rollers, and 17.7" (450 mm) rubber tracks. The loader
has a bucket breakout force of 7960 lbs (3620 kg) and maximum lift height of
128.5" (3265 mm) to hinge pin. The rated operating capacity is 4300 lbs (1950
kg), and tipping load is 8600 lbs (3900 kg).
| Engine Troubleshooting |
Engine starts hard or won't start
Air in fuel system - Bleed fuel system.
Clogged fuel filter - Replace filter element.
Fuel injection nozzles are damaged - Clean or change injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Valve out of adjustment - Adjust valve clearance.
Fuel injection pump is faulty - Replace injection pump or repair it.
Diesel starts but stalls immediately
Clogged air cleaner - Install new air cleaner element.
Fuel filter plugged - Replace filter element.
Fuel injection pump is leaking - Repair any leaks.
Clogged or defective injectors - Replace or clean fuel injectors.
Fuel injection pump damage - Repair or change injection pump.
Engine stops unexpectedly during operation
Coolant temperature is low - Warm up engine as required.
Fuel filter element clogging - Clean or change the filter.
Air in fuel system - Bleed fuel system.
Defective injection nozzle - Test injection nozzles and change if necessary.
Improper setting of fuel injection pump timing - Adjust according to specifications.
Engine stalls at low idle speed
Improperly adjusted low idle speed - Adjustment required.
Fuel injection pump damage - Change or repair the pump.
Fuel injector fault - Replace or clean fuel injectors.
Valve out of adjustment - Check and adjust as required.
Engine power is insufficient
Clogged air cleaner - Clean or replace element.
Dirty or damaged injection nozzles - Check injection nozzles and replace if required.
Uneven fuel injection pressure - Adjust pressure to proper level.
Valve out of adjustment - Check and adjust.
Low idle speed setting is not correct - Adjustment required.
Clogged fuel lines or hoses - Clean fuel hoses and lines.
Defective cylinder head gasket - Replace cylinder head gasket.
Piston rings are worn or damaged - Replace piston rings.
Engine overheats
Coolant level is low - Refill to the correct level and inspect system for leaks.
Insufficient engine oil - Fill up the engine oil.
Clogged radiator core or leaking radiator cap - Clean radiator or replace cap.
Fan belt slipping or worn - Belt change is required.
Engine is under excessive load - Load reducing is recommended.
Oil pressure is low
Not enough oil in the engine - Need to add oil.
Oil filter is dirty - Service or change engine oil filter element.
Oil grade or viscosity is wrong - Use correct viscosity oil.
Crankshaft bearing has incorrect oil clearance - Install new bearings.
Oil pump failure - Remove and inspect oil pump.
Engine knocks or noises
Engine oil level is insufficient - Check oil level and add oil as required.
Coolant temperature is low - Warm up the engine.
Fuel injection pump timing is not adjusted - Set the fuel pump timing correctly.
Incorrect low idle setting - Test and adjust.
Defective fuel injectors - Clean or replace fuel injectors.
Connecting rod is defective or misaligned - Need to align or replace the connecting rod.
Piston wear or scoring - Pistons need to be replaced.
| Drive System Troubleshooting |
Machine is not moving forward or backward
Hydraulic oil is insufficient - Fill the system to proper hydraulic oil level.
Jammed or damaged track mechanism - Remove jamming or repair tracks.
Input drive shaft malfunctioning - Replace or service the drive shaft.
Relief valve is damaged or worn - Change or repair relief valve.
Clogged suction line or hydraulic filter - Service suction line or change hydraulic filter.
Faulty foot or hand controls - Replace or repair.
Drive pump or motor is damaged - Replace or repair faulty component.
Machine does not drive straight or drives jerky
Track mechanism is defective or jammed - Remove jamming or repair tracks.
Tracks are loose or worn - Adjust track tension as required or replace tracks.
Debris, dirt, or foreign objects jammed in undercarriage track frame - Remove foreign objects or debris and clean undercarriage track frame.
Lack of power
Hydraulic oil filter is dirty - Change or service hydraulic filter.
Open or damaged relief valve - Close or replace relief valve.
Transmission components are defective or worn - Inspect and change defective parts.
Stuck input drive shaft - Replace or service the drive shaft.
Air leaks in hydraulic system - Bleed hydraulic system.
Drive system overheats
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.
Hydraulic fluid filter is plugged - Replace or service hydraulic filter.
Stuck relief valve - Repair or replace.
Hydraulic motor or drive pump is worn - Check and repair if required.
Dirty oil cooler - Clean the cooling fins.
Drive system overload - Reduce the load.
Drive system is excessively noisy
Oil viscosity is incorrect - Use the specified type of oil.
Air in hydraulic system - Bleed air from hydraulic system.
Worn hydraulic motor or drive pump - Inspect and replace as necessary.
Defective or worn mechanical parts of drive system - Check the components for worn or defect and replace if necessary.
| Hydraulics Troubleshooting |
Hydraulic system overheating
Hydraulic pressure is incorrect - Adjust pressure as required.
Main relief valve malfunction or improper adjustment - Adjust the valve or replace if necessary.
Hydraulic oil is dirty - Fill up with fresh hydraulic oil.
Lack of hydraulic oil - Fill up the hydraulic oil.
Hydraulic pump is defective - Repair or install new hydraulic pump.
Boom won't lower or raise
Lift controls failure - Inspect and repair if necessary.
Hydraulic pump not working - Repair or change pump if required.
Hydraulic control valve is faulty - Repair or replace hydraulic valve.
Hydraulic cylinder malfunction - Repair or install a new lift cylinder.
Hydraulic fluid is insufficient - Add fluid as required.
Bucket tilt does not work
Bucket tilt controls are defective - Inspect and repair if necessary.
Hydraulic pump not working - Repair or install new hydraulic pump.
Hydraulic control valve malfunction - Replace or repair the valve.
Hydraulic bucket cylinder is defective - Repair or change cylinder.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.
Slow boom or bucket operation
Hydraulic pump is defective - Test the pump performance and change pump if required.
Oil leaks from hydraulic cylinder - Replace cylinder piston seals.
Low hydraulic fluid level - Fill up the hydraulic fluid.
Defective or not adjusted hydraulic control valve - Repair or adjust correctly.
Low hydraulic pressure - Hydraulic pressure must be set correctly.
Jerky operation of the bucket or boom
Hydraulic system is leaking air - Bleed air from hydraulic system.
Clogged hydraulic oil filter element - Service or change the hydraulic filter.
Hydraulic oil is contaminated - Change hydraulic oil.
Cylinder rod or tube is scuffed - Replace failed component.
Hydraulic pump is noisy
Leaking hydraulic system or insufficient oil level - Correct hydraulic leaks or top up oil as needed.
Hydraulic filter is clogged - Change or clean oil filter.
Suction line is clogged - Clean suction line as required.
Air enters the pump - Bleed air from hydraulics.
Faulty pump components - Rebuild or install new pump.
| Electrical Troubleshooting |
Battery is not charging
Corroded or loose electrical wire connections - Service or tighten cable connections.
Battery terminal clamps are faulty - Terminal clamps should be changed.
Battery dead cell - Battery replacement required.
Defective or loose belt - Adjust belt tension or change the belt.
Starter motor turns slow
Battery capacity is low - Battery needs to be recharged.
Battery is draining quickly - Battery needs to be serviced or replaced.
Terminals are faulty or battery cables are disconnected - Connect cables correctly or replace terminals.
Starter motor is not working
Battery is discharged or defective - Recharge or replace battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output voltage - Low battery charging, charge as required.
Damaged starter motor - Repair or replace starter.
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| COMPACT TRACK LOADERS SPECIFICATIONS |