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Gehl R260 Troubleshooting

The Gehl R260 skid steer loader driveline system components: Yanmar 4TNV98CT-NMS 4-cylinder turbocharged liquid-cooled diesel engine with a rated power of 70.7 hp (52.7 kW), and 1-speed or 2-speed hydrostatic transmission. The hydraulic system has a pump with a rated capacity of 23.5 gal/min (89.6 l/min) or 35 gal/min (132.6 l/min). The Gehl R260 is equipped with a radial-lift loader boom, 100H drive chains, and 12x16.5 HD standard tires. The skid steer loader has a maximum lift height of 123" (3125 mm) to hinge pin and dump height of 94" (2390 mm). The rated operating capacity is 2600 lbs (1180 kg), and tipping load is 5200 lbs (2360 kg).

Engine Troubleshooting

Engine difficult to start or will not start
Air trapped in fuel system - Bleed air.
Fuel filter element is clogged - Clean or replace the filter.
Damaged or dirty injection nozzles - Check and replace nozzles if required.
Dirt or water in fuel system - Drain water or flush dirt from the system.
The valve clearance is incorrect - Need to adjust valve clearance.
Fuel injection pump damage - Rebuild or change fuel pump.

Diesel starts but stalls suddenly
Air cleaner is dirty - Install new air cleaner element.
Fuel filter element is dirty - Replace the filter element.
Poor fuel injection pump tightness - Look for any leaks of fuel pump, tighten it fast.
Clogged or defective injectors - Replace fuel injectors.
Damaged fuel injection pump - Replace or repair injection pump.

Engine stops running suddenly
Engine is cold - Normalize the temperature by warming up the engine.
Clogged fuel filter - Clean or replace the filter.
Air in fuel system - Bleed fuel system.
Damaged or dirty injection nozzles - Check and replace nozzles if required.
Fuel injection pump timing is wrong - Adjust the pump as required.

Engine stops when idle
Low idle speed setting is incorrect - Normalize low idle speed.
Fuel injection pump damage - Repair or replace injection pump.
Fuel injectors are faulty or clogged - Change or clean fuel injectors.
Excessive valve clearance - Need to adjust valve clearance.

Low engine power
Air cleaner is clogged - Install new air cleaner element.
Faulty fuel injection nozzles - If necessary, replace with a new nozzle.
Insufficient fuel injection pressure - Test fuel injection pressure and adjust it correctly.
Valve clearance is wrong - Adjustment procedure required.
Incorrectly set low idle speed - Adjustment required.
Dirt in the fuel lines or hoses - Fuel hoses and lines must be clean.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Leaking or defective piston rings - Piston rings replacement required.

Engine is overheated
Engine coolant is insufficient - Refill to the correct level and inspect system for leaks.
Engine oil level low - Check oil level and add oil as required.
Dirty radiator core or faulty radiator cap - Clean radiator or replace cap.
Fan belt is worn or faulty - Change as required.
Engine overload - Load reducing is recommended.

Low oil pressure
Lack of oil - Fill crankcase to proper oil level.
Plugged engine oil filter - Replace or service engine oil filter.
Incorrect oil viscosity - Use proper viscosity oil.
Main bearing oil clearance is excessive - Change bearings.
Defective oil pump - Repair or replace.

Abnormal engine knocking or noise
Low engine oil level - Add oil to the engine crankcase.
Low coolant temperature - Warm up the engine.
Improper fuel injection timing - Adjust according to specifications.
Incorrect low idle speed adjustment - Normalize low idle speed.
Fuel injectors are dirty or defective - Test and replace fuel injectors if necessary.
Connecting rod misalignment or failure - Connecting rod needs to be aligned or changed.
Scored or worn pistons - Pistons replacement required.

Drive System Troubleshooting

Machine will not move forward or backward
Insufficient hydraulic fluid - Checking hydraulic fluid level and add if necessary.
Drive chain is worn - Check drive chain and change defective components.
Worn or defective relief valve - Service or change relief valve.
Clogged hydraulic filter or suction line - Change hydraulic filter or service suction line.
Defective hand or foot controls - Check and repair as required.
Worn drive motor or pump - Check and repair if required.

Loss of power
Plugged hydraulic oil filter - Replace hydraulic filter.
Relief valve is opened or defective - Replace or close relief valve.
Transmission parts are faulty or damaged - Check and change defective components.
Input drive shaft is defective - Repair or replace faulty drive shaft.
Hydraulic system is leaking air - Bleed air from system.

Drive system keeps overheating
Low hydraulic fluid level - Fill up the hydraulic fluid.
Dirty hydraulic fluid filter - Change hydraulic filter.
Relief valve is not working correctly - Change or repair relief valve.
Drive pump or hydraulic motor is damaged - Inspect and change as required.
Plugged hydraulic oil cooler - Clean the cooling fins.
Transmission overloading - Load needs to be reduced.

Drive system is noisy
Incorrect oil viscosity - Use correct oil viscosity.
Hydraulic system is leaking air - Bleed hydraulic system.
Hydraulic motor or drive pump is worn - Repair or change faulty component.
Defective or worn mechanical components of drive system - Inspect the parts for worn or defect and repair as needed.

Hydraulics Troubleshooting

Hydraulic system overheated
Hydraulic pressure is incorrect - Adjust pressure correctly.
Main relief valve is damaged or adjusted improperly - Adjust relief valve or change if required.
Hydraulic fluid is dirty - The fluid must be changed.
Hydraulic fluid level is low - Check and refill the hydraulic fluid.
Hydraulic pump is worn - Change or repair hydraulic pump if required.

Lift arm cannot be raised or lowered
Lift controls malfunction - Inspect and repair if necessary.
Hydraulic pump malfunction - Repair or install new hydraulic pump.
Hydraulic control valve is faulty - Install a new valve or repair it.
Damaged hydraulic cylinder - Replace or repair boom cylinder.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.

Bucket does not function
Bucket tilt controls are defective - Check and repair as required.
Hydraulic pump is broken - Replace or repair pump if necessary.
Hydraulic control valve is defective - Repair or change hydraulic valve.
Bucket cylinder malfunction - Repair or change cylinder.
Hydraulic fluid is insufficient - Fill up the hydraulic fluid.

Slow bucket or lift arm operation
Hydraulic pump is worn - Check the pump capacity and replace pump if required.
Leaking hydraulic cylinder - Correct leakage by changing the seals.
Hydraulic oil level low - Fill the system to proper hydraulic oil level.
Damaged or incorrect adjusted hydraulic control valve - Set correctly or repair.
Hydraulic system loosing pressure - Adjust it correctly.

Lift arm or bucket is moving jerkily
Air leaks in hydraulic system - Bleed hydraulic system.
Clogged hydraulic oil filter element - Clean or change the filter.
Hydraulic oil is dirty - Hydraulic oil change required.
Cylinder tube or rod scoring - Replace damaged component.

Excessive hydraulic pump noise
Lack of oil or hydraulic leakage - Remedy hydraulic leakage or refill oil as necessary.
Dirty hydraulic filter - Service or change hydraulic filter.
Dirty suction line - Suction line needs to be cleaned.
Air enters the pump - Air bleeding is required.
Worn pump parts - Rebuild or install new pump.

Electrical Troubleshooting

Battery won’t charge
Electrical wire connections are corroded or loose - Service or tighten connections.
Faulty electrical terminal connectors - Change terminal connectors.
Battery bad cell - Replace the battery.
Loose or damaged belt - Adjust belt tension or change the belt.

Starter turns slowly
Low battery output - Recharge the battery.
Battery runs out quickly - Service charging system or change battery.
Disconnected wiring or bad battery terminals - Check wiring connections and replace or clean terminals.

Starter will not work
Battery is discharged or worn - Change or recharge battery.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery capacity - Low battery charging, charge as required.
Starter motor is faulty - Starter should be changed.