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Kubota SVL90 Troubleshooting
The
Kubota SVL90 compact track loader driveline system components: Kubota
V3800-DI-TE3 4-cylinder turbocharged liquid-cooled diesel engine with a rated
power of 90 hp (67.1 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 is equipped with a vertical-lift loader,
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 (3610 kg) and
max 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 |
Diesel engine hard to start or doesn't start
Air in the fuel system - Air bleeding.
Dirty fuel filter - Replace filter element.
Fuel injection nozzles are faulty or clogged - Clean or replace injection nozzles.
Water in the fuel system - Change fuel and repair fuel system.
Improper valve clearance - Have it adjusted.
Fuel injection pump malfunction - Repair or install a new fuel pump.
Engine starts and immediately shuts off
Air cleaner is clogged - Clean or change cleaner.
Clogged fuel filter - Replace filter element.
Fuel injection pump is leaking - Repair any leaks.
Damaged or clogged injectors - Clean or replace fuel injectors.
Fuel injection pump is not working correctly - Rebuild or replace pump.
Engine stalls during operation
Coolant temperature is low - Warm up engine as required.
Fuel filter is plugged - Clean the filter or install new filter element.
Air trapped in fuel system - Bleed air.
Defective injection nozzle - Service or change injection nozzles.
Wrong setting of fuel injection pump timing - Adjust the pump as required.
Engine stalls while idle
Improperly adjusted low idle speed - Adjust low idle speed.
Damaged fuel injection pump - Replacement or repair required.
Damaged or clogged injectors - Clean fuel injectors or change it.
Valve clearance is wrong - Check and adjust.
Diesel engine is losing power
Air cleaner is clogged - Clean or change.
Dirty or damaged injection nozzles - Replace injection nozzles.
Incorrect fuel injection pressure - Adjust to proper pressure.
Valve out of adjustment - Correct valve clearance needs to be set.
Improperly adjusted low idle speed - Adjust low idling as recommended.
Dirt in the fuel hoses or lines - Service fuel lines and hoses.
Blown cylinder head gasket - Replace cylinder head gasket.
Piston rings are defective or leaking - Piston rings need to be replaced.
Engine is overheated
Low coolant level - Refill to the correct level and inspect system for leaks.
Not enough engine oil - Fill up the engine oil.
Clogged radiator fins or damaged radiator cap - Clean radiator or change cap.
Loose or defective fan belt - Change as required.
Engine is overloaded - Load reducing is recommended.
Low oil pressure
Lack of oil - Fill up the engine oil.
Oil filter is clogged - Clean or replace engine oil filter element.
Wrong oil viscosity - Drain and refill with oil of correct grade and viscosity.
Incorrect oil clearance in crankshaft bearing - Install new bearings.
Worn oil pump - Install a new pump.
Engine knocking or noise
Engine oil level low - Fill up the oil to required level.
Coolant temperature is low - Warm up engine as required.
Timing of fuel injection pump is incorrect - Set it up as required.
Incorrectly set low idle speed - Correct low idle adjustment.
Dirty or defective injectors - Change or clean fuel injectors.
Connecting rod is worn or not aligned - Connecting rod must be aligned or replaced.
Pistons are worn or scored - Replace the pistons.
| Drive System Troubleshooting |
Drive system will not operate in either direction
Insufficient hydraulic oil - Need to add oil.
Blocked or defective track mechanism - Repair or remedy blockage.
Input drive shaft is worn - Replace or service the drive shaft.
Relief valve worn or defective - Repair or change.
Plugged suction line or hydraulic filter - Replace hydraulic filter or clean suction line.
Foot or hand controls are defective - Inspect and repair if necessary.
Drive motor or pump is worn - Repair or replace faulty component.
Machine will not move straight or moves jerkily
Damaged or jammed track mechanism - Fix jamming or repair tracks.
Tracks are faulty or loose - Adjust track tension or repair tracks.
Undercarriage track frame is clogged with dirt, debris, or foreign objects - Remove debris or foreign objects and clean track frame.
Loss of power
Plugged hydraulic oil filter - Change or service hydraulic filter.
Worn or open relief valve - Close or change relief valve.
Faulty or damaged transmission components - Check and change faulty components.
Damaged input drive shaft - Change or repair faulty drive shaft.
Air in the hydraulic system - Air bleeding is required.
Drive system overheats
Low hydraulic oil level - Need to add oil.
Hydraulic fluid filter is dirty - Check, clean, or replace as required.
Relief valve malfunction - Repair or replace.
Worn hydraulic motor or drive pump - Repair or change faulty component.
Hydraulic oil cooler is plugged - Clean the cooling fins.
Overloaded drive system - Load should be reduced.
Drive system makes excessive noise
Improper oil viscosity - Drain and refill with proper oil.
Air leaks in hydraulic system - Bleed hydraulic system.
Defective drive pump or hydraulic motor - Inspect and replace as necessary.
Worn or damaged mechanical parts of drive system - Check drive system and change faulty components.
| Hydraulics Troubleshooting |
Hydraulic system is overheated
Hydraulic pressure is incorrect - Adjust pressure correctly.
Main relief valve is faulty or misadjusted - Adjust or replace the relief valve.
Dirty hydraulic fluid - Hydraulic fluid change required.
Hydraulic fluid level is insufficient - Add fluid to the hydraulic system.
Hydraulic pump is defective - Change or repair hydraulic pump if required.
Boom can't lift or drop
Lift controls are damaged - Repair or replace.
Hydraulic pump malfunction - Repair or install new hydraulic pump.
Damaged hydraulic control valve - Repair or change the valve.
Hydraulic cylinder failure - Repair or replace hydraulic cylinder.
Low hydraulic oil level - Check and refill the hydraulic oil.
Bucket does not function
Bucket controls are faulty - Repair or change.
Defective hydraulic pump - Install new pump or repair it.
Hydraulic control valve malfunction - Repair or change the valve.
Bucket cylinder is faulty - Repair or change cylinder.
Low hydraulic oil level - Check and refill the hydraulic oil.
Slow boom or bucket operation
Hydraulic pump is faulty - Check the pump performance and replace it if required.
Leaking hydraulic cylinder - Correct leakage by changing the seals.
Hydraulic fluid is insufficient - Fill up the hydraulic fluid.
Worn or unadjusted hydraulic control valve - Adjust correctly or repair.
Hydraulic system loosing pressure - Set pressure correctly.
Lift arm or bucket is jerky
Air leaks in hydraulic system - Bleed air from system.
Dirty hydraulic oil filter element - Clean or install new filter.
Hydraulic oil is dirty - Hydraulic oil change required.
Scored cylinder tube or rod - Change worn component.
Hydraulic pump makes excessive noise
Hydraulic leaks or low oil level - Correct hydraulic leaks or top up oil as needed.
Hydraulic filter clogging - Change or clean oil filter.
Suction line clogging - Suction line needs to be cleaned.
Pump is sucking air - Need to bleed air.
Pump components are damaged - Replace or rebuild the pump.
| Electrical Troubleshooting |
Battery is not charging
Corroded or loose wire connections - Tighten or clean connections.
Faulty battery terminal connectors - Terminal connectors should be replaced.
Battery is worn - Battery replacement required.
Belt is worn or loose - Need to adjust belt tension or replace belt.
Starter motor cranks slow
Low battery output voltage - Charge the battery.
Battery will not hold charge - Battery needs service or replacement.
Battery terminals are corroded or wires are disconnected - Connect wiring properly or install new terminals.
Starter does not work
Battery is drained or worn - Recharge or replace battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery voltage is low - Battery is drained, charge it.
Damaged starter motor - Starter needs to be replaced.
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| COMPACT TRACK LOADERS SPECIFICATIONS |