Gehl V270 Skid Steer Troubleshooting

The Gehl V270 skid steer loader driveline system components: a 202.5 cu.in (3.3L) Yanmar 4TNV98CT four-cylinder turbocharged diesel engine with a rated power of 72 hp (53.7 kW), and one-speed or two-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 23.5 gal/min (89.6 l/min). The system relief pressure is 3300 psi (228 bar). The Gehl V270 is equipped with a vertical-lift loader boom, 100H roller chains, and 12x16.5 tires. The skid steer has a maximum lift height of 130.3" (3310 mm) to hinge pin and dump height of 100" (2540 mm). The rated operating capacity is 2700 lbs (1225 kg), and tipping load is 5400 lbs (2550 kg).

Engine Troubleshooting

Diesel hard to start or doesn't start

Air in fuel system - Bleed fuel system.
Clogged fuel filter - Install new filter element.
Burnt or defective injection nozzle - Check and replace nozzles if required.
Water or dirt in fuel system - Drain, flush, and service the system.
Valve out of adjustment - Correct valve clearance needs to be set.
Fuel injection pump is not operating properly - Change or repair the pump.

Engine starts but stalls immediately

Air filter is clogged - Clean or change.
Fuel filter element is dirty - Clean or change the filter.
Fuel injection pump is leaking - Repair any leaks.
Clogged or defective injectors - Test and replace fuel injectors if necessary.
Fuel injection pump is not working correctly - Repair or change injection pump.

Diesel shuts off while driving

Low coolant temperature - Warm up the engine.
Clogged fuel filter - Replace filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are faulty or clogged - Inspect nozzles and replace if necessary.
Timing of fuel injection pump is incorrect - Adjust the pump as required.

Engine stops when idling

Incorrect low idle speed adjustment - Adjustment required.
Faulty fuel injection pump - Repair or change injection pump.
Clogged or defective injectors - Replace or clean fuel injectors.
The valve clearance is incorrect - Adjust to proper valve clearance.

Engine power is insufficient

Air cleaner is dirty - Install new air cleaner element.
Fuel injection nozzles are dirty or defective - Clean or change injection nozzles.
Incorrect fuel injection pressure - Check the fuel injection pressure and adjust if necessary.
Improper valve clearance - Adjustment procedure required.
Incorrectly set low idle speed - Correct low idle settings.
Dirty fuel hoses or lines - Clean fuel system lines and hoses.
Cylinder head gasket is blown - Install a new gasket.
Piston rings are damaged or leaking - Install new piston rings.

Engine overheating

Engine coolant is insufficient - Refill to the correct level and inspect system for leaks.
Engine oil level low - Fill the crankcase with engine oil.
Clogged radiator fins or leaking radiator cap - Clean radiator or change cap.
Loose or damaged fan belt - Fan belt must be replaced.
Engine overload - Load reducing required.

Insufficient oil pressure

Low oil level - Check and refill the oil.
Oil filter clogging - Replace or clean engine oil filter element.
Incorrect engine oil Use oil of proper viscosity.
Excessive main bearing oil clearance - Bearings need to be reinstalled.
Oil pump failure - Repair or replace.

Abnormal engine knocking or noise

Engine oil level is insufficient - Fill up the oil to required level.
Low coolant temperature - Warm up the engine.
Fuel injection pump timing is wrong - Use the correct fuel injection pump timing adjustment.
Incorrect low idle setting - Adjust low idle speed.
Fuel injector fault - Test and replace fuel injectors if necessary.
Connecting rod is misaligned or worn - Replace or align connecting rod.
Pistons are worn or scored - Install new pistons.

Drive System Troubleshooting

Drive system doesn't function in one direction or either direction

Hydraulic oil is insufficient - Check and refill the hydraulic oil.
Drive chain malfunction - Check drive chain and change defective components.
Worn input drive shaft - Change or repair.
Defective or worn relief valve - Repair or install a new relief valve.
Suction line or hydraulic filter is clogged - Clean suction line or replace hydraulic filter.
Damaged or worn hand or foot controls - Repair or replace.
Drive motor or pump is worn - Repair or change faulty component.

Power is too low

Plugged hydraulic oil filter - Change or clean hydraulic filter.
Open or faulty relief valve - Replace or close relief valve.
Worn or faulty transmission components - Inspect and change defective parts.
Stuck input drive shaft - Repair or install a new drive shaft.
Air leaks in hydraulic system - Bleed air from system.

Drive system overheating

Hydraulic oil is insufficient - Need to add oil.
Plugged hydraulic fluid filter - Change or clean hydraulic filter.
Relief valve worn or defective - Repair or change.
Drive pump or hydraulic motor malfunction - Inspect and change as required.
Dirty oil cooler - Clean the cooling fins.
Drive system overload - Reduce loading.

Drive system is excessively noisy

Improper oil viscosity - Use oil of proper viscosity.
There is air in the hydraulic system - Bleed air from system.
Hydraulic motor or drive pump is worn - Repair or replace faulty component.
Defective or worn mechanical components of drive system - Inspect the components for worn or defect and repair as required.

Hydraulics Troubleshooting

Hydraulic system is overheated

Incorrect hydraulic pressure setting - Adjust it correctly.
Main relief valve improper adjustment or failure - Adjust or change relief valve.
Contaminated hydraulic fluid - Hydraulic fluid change required.
Lack of hydraulic fluid - Fill the hydraulic system with oil.
Defective hydraulic pump - Repair or replace pump if necessary.

Boom won't lower or raise

Lift controls are defective - Inspect and repair if necessary.
Hydraulic pump not working - Change or repair hydraulic pump if required.
Hydraulic control valve malfunction - Repair or replace the valve.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.

Bucket does not function

Damaged bucket controls - Change or repair.
Hydraulic pump malfunction - Repair or change pump if required.
Hydraulic control valve failure - Install a new valve or repair it.
Bucket cylinder failure - Install a new cylinder or repair it.
Hydraulic fluid is insufficient - Fill up the hydraulic fluid.

Boom or bucket moves slowly

Hydraulic pump is defective - Check pump capacity and change if necessary.
Oil leaks from hydraulic cylinder - Repair leak by replacing the seals.
Low hydraulic oil level - Need to add oil.
Hydraulic control valve is defective or set improper - Repair or adjust correctly.
Hydraulic pressure is low - Adjust it correctly.

Jerky operation of the bucket or boom

Air trapped in hydraulic system - Bleed air from system.
Clogged hydraulic oil filter element - Service or replace the hydraulic filter.
Dirty hydraulic fluid - Hydraulic fluid change required.
Scored cylinder tube or rod - Change defective component.

Hydraulic pump makes excessive noise

Hydraulic leaks or lack of oil - Add hydraulic oil or correct system leaks.
Hydraulic filter is dirty - Service or change hydraulic filter.
Plugged suction line - Suction line needs to be cleaned.
Pump sucks air - Need to bleed air.
Pump parts are worn out - Replace or rebuild the pump.

Electrical Troubleshooting

Battery is not charging

Electrical cable connections are loose or corroded - Tighten or clean electrical wiring connections.
Defective electrical terminal connectors - Replace terminal connectors.
Battery is worn - Use a new battery.
Belt is defective or loose - Need to adjust belt tension or replace belt.

Starter turns slow

Low battery power - Charge the battery.
Battery won’t hold charge - Service or replace the battery.
Disconnected wires or corroded battery terminals - Connect cables properly or replace terminals.

Starter is not working

Battery is low or faulty - Replace or charge as required.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Low battery output voltage - Charge the battery.
Starter motor is damaged - Repair or install a new starter.