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Gehl 2600 Troubleshooting

The Gehl HL2600 skid steer loader is powered by 60 cu.in (0.98L) Onan NHC/MS 4-cycle 2-cylinder horizontally opposed air-cooled gasoline engine with a rated power of 22.5 hp (16.7 kW) at 3300 rpm. The Gehl HL2600 is equipped with a radial-lift boom, single-speed hydrostatic transmission, 60K drive chains, and 5.70x15 or 27x8.50x15 tires. The hydraulic system has a pump with fluid flow rate of 8 gpm (30.3 lpm). The hydraulic pressure is 2000 psi (138 bar). The skid steer has a rated operating capacity of 800 lbs (363 kg) and tipping load of 1600 lbs (725 kg). The lift height is 101" (2565 mm) to hinge pin, and dump height is 98" (2490 mm).

Engine Troubleshooting

Engine doesn't start or hard to start
No fuel in fuel tank - Fill it up.
Low-quality gasoline - Change gasoline.
Dirty fuel lines - Inspect and clean.
Spark plug wiring connection is defective - Check the spark plug wire connection, repair or replace.
Defective spark plug - Spark plug need to be replaced.
Dirty fuel filter - Change fuel filter.
Faulty safety switch - Change damaged switch.
Problems with carburetor adjustment - Adjust as required.
Low engine compression - Inspect cylinder block and change defective components.
Not adjusted or damaged throttle cable - Change cable or adjust correctly.

Irregular engine running
Cooling fins are blocked - Need to wash or clean.
Ignition system failure - Inspect ignition system and change failed components.
Choke cable is defective or stuck - Service or replace the cable.
Plugged air filter - Service or change air filter.
Fuel pump is damaged or dirty - Check fuel pump and replace if necessary.

Engine starts but then shuts off
Defective spark plug - Change spark plug.
Defective or dirty carburetor - Repair or clean carburetor.
Ignition coil is damaged - Replace ignition coil as necessary.
Broken or loose valve springs - Replace valve springs.
Stuck valves - Clean the valves.

Engine overheated
Not enough engine oil - Fill the crankcase with engine oil.
Engine is running overloaded - Reduce load.
Cooling fins are plugged - Clean and wash as required.
Carburetor is running lean - Set the carburetor correctly.
Bad ignition timing - Adjust ignition timing correctly.
Improper valve setting - Set the valves correctly.

Abnormal engine knocking or noise
Stale gasoline - Change fuel.
Engine overload - Reduce the load.
Engine oil level is insufficient - Fill up the engine oil.
Low idle speed setting is incorrect - Correct idle adjustment.
Fuel pump is defective or dirty - Check fuel pump and change if required.
Worn main bearings or crankshaft - Crankshaft or bearings need to be replaced.
Valve clearance is improper - Adjust to proper valve clearance.
Cylinder bore or piston rings are worn - Change defective components.

Lack of engine power
Carburetor is improperly adjusted or clogged - Adjust the carburetor properly or clean it.
Air filter element is clogged - Replace or clean air filter.
Fuel pump is defective or dirty - Clean or replace fuel pump.
Ignition system is defective - Inspect ignition system and change faulty parts.
Blown cylinder head gasket - Cylinder-head gasket replacement required.
Stuck or burned valves - Service or change valves.
Push rod is worn or defective - Change push rod.
Worn cylinder block parts - Change defective components.
Oil filter is blocked (if equipped) - Replace or service oil filter.

High fuel consumption
Choke is not fully open - Check choke cable and adjust it.
Carburetor main jet is incorrectly adjusted - Adjust it properly.
Loose or defective spark plug - Re-tighten or replace spark plug.
Stuck, worn, or burned valves - Service or replace valves.
Piston, sleeve, or rings are damaged - Change defective components.
Excessive valve clearance - Need to adjust valve clearance.

Engine oil consumption is too high
Gaskets or seals may be damaged - Defective components must be replaced.
Worn valve stems and valve guides - Install new valves.
Piston rings are defective or worn - Piston rings need to be replaced.
Worn piston or cylinder liner - Check liner and piston, replace as required.
Clogged breather pipe or hose - Clean or replace.

Drive System Troubleshooting

Machine will not move forward or backward
Low hydraulic oil level - Need to add oil.
Drive chain is worn - Inspect drive chain and replace defective components.
Faulty relief valve - Rebuild or install a new relief valve.
Clogged suction line or hydraulic filter - Change hydraulic filter or service suction line.
Foot or hand controls are damaged - Inspect and repair if necessary.
Drive pump or motor malfunction - Inspect and replace as necessary.

Low power
Plugged hydraulic oil filter - Change hydraulic filter.
Relief valve is damaged or open - Replace or close relief valve.
Defective or worn transmission parts - Check and change faulty components.
Worn input drive shaft - Change or repair faulty drive shaft.
Air in the hydraulic system - Need to bleed air.

Drive system overheating
Hydraulic fluid is insufficient - Fill up the hydraulic fluid.
Hydraulic fluid filter is clogged - Change or service hydraulic filter.
Worn or damaged relief valve - Repair or change.
Drive pump or hydraulic motor malfunction - Repair or replace faulty component.
Hydraulic oil cooler is plugged - Clean cooling fins as required.
Drive system overload - Reduce the load.

Excessive noise
Oil viscosity is incorrect - Use oil of proper viscosity.
Air in the hydraulic system - Bleed hydraulic system.
Drive pump or hydraulic motor malfunction - Replace or repair faulty component.
Defective or worn mechanical components of drive system - Check drive system and change faulty components.

Hydraulics Troubleshooting

Hydraulic system overheated
Hydraulic pressure is not correct - Adjust pressure as required.
Faulty or improperly adjusted main relief valve - Adjust or change relief valve.
Hydraulic fluid is dirty - Fill up with fresh hydraulic fluid.
Hydraulic oil level is low - Check oil level and add hydraulic oil as required.
Hydraulic pump is faulty - Replace or repair pump if necessary.

Lift arm cannot be raised or lowered
Lift controls malfunction - Replace or repair.
Hydraulic pump malfunction - Install new pump or repair it.
Defective hydraulic control valve - Repair or change the valve.
Broken hydraulic cylinder - Repair or change hydraulic cylinder.
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.

Bucket is not working
Faulty bucket tilt controls - Replace or repair.
Defective hydraulic pump - Change or repair hydraulic pump if required.
Hydraulic control valve is defective - Repair or change the valve.
Damaged bucket cylinder - Replace or repair cylinder.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.

Boom or bucket functions slowly
Faulty hydraulic oil pump - Test the pump performance and change pump if required.
Hydraulic cylinder leaking - Cylinder seals need to be replaced.
Hydraulic fluid is insufficient - Add fluid as required.
Hydraulic control valve is defective or set improper - Set correctly or repair.
Hydraulic pressure loss - Hydraulic pressure must be set correctly.

Lift arm or bucket movements are jerky
There is air in the hydraulic system - Bleed hydraulic system.
Hydraulic oil filter is clogged - Replace or clean the filter.
Dirty hydraulic oil - The oil must be changed.
Scored cylinder tube or rod - Change defective component.

Excessive hydraulic pump noise
Hydraulic leakage or low oil level - Top up hydraulic oil or remedy leakage in system.
Plugged hydraulic filter - Clean or install new filter.
Suction line is clogged - Suction line needs to be cleaned.
Air enters the pump - Bleed air.
Pump parts are faulty - Replace or rebuild the pump.

Electrical Troubleshooting

Battery won’t charge
Loose or corroded electrical wiring connections - Clean or tighten wiring connections.
Defective battery terminal connectors - Install new terminal connectors.
Faulty cell in battery - Replace the battery.
Belt is defective or loose - Belt needs to be adjusted or replaced.

Starter motor cranks slow
Low battery power - Recharge the battery.
Battery runs out quickly - Service charging system or replace battery.
Battery terminals are corroded or wires are disconnected - Check wiring connections and replace or clean terminals.

Starter is not cranking
Battery is discharged or defective - Change or recharge battery.
Wiring is improperly connected or disconnected - Check wiring and connect properly.
Battery capacity is low - Charge the battery.
Starter motor failing - Repair or replace starter.