Home / Skid Steer Loaders / Gehl Skid Steer Loaders / Gehl 3640E

Gehl 3640E Troubleshooting

The Gehl 3640E skid steer loader is powered by Yanmar 3TNV88-BKMS 4-cycle vertical 3-cylinder direct injection liquid-cooled diesel engine with a rated power of 35 hp (26 kW) at 2600 rpm. The Gehl 3640E is equipped with a radial-lift loader boom, single-speed hydrostatic transmission, 80K drive chains, and 27x8.5x15 standard tires. The hydraulic system has a pump with fluid flow rate of 14.5 gpm (55 lpm). The hydraulic pressure is 2750 psi (190 bar). The skid steer has a rated operating capacity of 1050 lbs (476 kg) and tipping load of 2100 lbs (953 kg). The lift height is 108 inches (2745 mm) to hinge pin, and dump height is 84.5 inches (2145 mm).

Engine Troubleshooting

Engine difficult to start or won't start
Air in the fuel pipes - Bleed the fuel pipes.
Fuel filter element is dirty - Replace filter element.
Faulty or dirty injection nozzles - If necessary, replace with a new nozzle.
Water in the fuel system - Change fuel and repair fuel system.
Excessive valve clearance - Correct valve clearance needs to be set.
Defective fuel injection pump - Rebuild or install a new injection pump.

Engine starts but stops suddenly
Air filter is plugged - Clean or change filter.
Clogged fuel filter - Clean or replace the filter.
Fuel injection pump is leaking - Repair any leaks.
Dirty or defective injectors - Clean fuel injectors or change it.
Damaged fuel injection pump - Install a new fuel pump or repair.

Engine stalls while running
Engine has not warmed up to the recommended temperature - Warm up the engine.
Clogged fuel filter - Clean or change the filter.
Air in the fuel lines - Bleed the fuel lines.
Clogged injection nozzle - Clean or change injection nozzles.
Wrong setting of fuel injection pump timing - Check the fuel injection pump timing adjustment.

Engine stops while idle
Incorrectly adjusted low idle speed - Correct the settings.
Fuel injection pump is not operating properly - Replace or rebuild injection pump.
Dirty or defective injectors - Change or clean fuel injectors.
The valve clearance is incorrect - Adjustment procedure required.

Engine loses power
Air filter is clogged - Clean or change filter.
Clogged injection nozzle - Install a new kit of correctly balanced nozzles.
Uneven fuel injection pressure - Check the fuel injection pressure and adjust if necessary.
The valve clearance is incorrect - Correct valve clearance needs to be set.
Low idle speed set incorrectly - Adjust low idling as recommended.
Clogged fuel lines or hoses - Fuel lines and hoses need to be cleaned.
Damaged cylinder-head gasket - Gasket should be replaced.
Piston rings are broken or leaking - Install new piston rings.

Engine overheated
Lack of coolant in cooling system - Fill radiator to proper level and check components for faults.
Engine oil insufficient - Fill up the oil to required level.
Radiator fins are dirty or radiator cap is defective - Clean radiator or replace cap.
Fan belt is loose or defective - If necessary, replace the belt.
Diesel engine overloaded - Load reducing required.

Oil pressure is low
Low crankcase oil level - Fill the crankcase with oil.
Oil filter element is dirty - Service or replace engine oil filter.
Incorrect engine oil Use oil of correct viscosity.
Incorrect crankshaft bearing oil clearance - Bearings need to be reinstalled.
Oil pump malfunction - Install a new pump.

Engine noises or knocks
Engine oil insufficient - Check and refill engine oil.
Engine is not preheated - Normalize the temperature by warming up the engine.
Fuel injection pump timing is wrong - Adjust according to specifications.
Wrong adjustment of low idle speed - Adjust as required.
Dirty or defective injectors - Clean fuel injectors or change it.
Connecting rod is worn or misaligned - Connecting rod needs to be aligned or changed.
Pistons are worn or scored - Replace the pistons as required.

Drive System Troubleshooting

Drive system won't operate in either direction
Insufficient hydraulic fluid - Fill up the hydraulic fluid.
Faulty drive chain - Inspect drive chain and replace defective parts.
Relief valve is stuck - Repair or replace relief valve.
Dirty hydraulic filter or suction line - Clean suction line or replace hydraulic filter.
Hand or foot controls failure - Replace or repair.
Drive pump or motor is damaged - Inspect and change as required.

Low power
Plugged hydraulic oil filter - Change hydraulic filter.
Relief valve is damaged or open - Close or change relief valve.
Transmission parts are defective or worn - Check and change faulty components.
Input drive shaft is worn - Service or change faulty drive shaft.
There is air in the hydraulic system - Bleed hydraulic system.

Drive system overheating
Hydraulic oil is insufficient - Need to add oil.
Clogged hydraulic fluid filter - Replace or service hydraulic filter.
Relief valve is damaged or worn - Change or repair relief valve.
Drive pump or hydraulic motor is damaged - Repair or replace faulty component.
Oil cooler is clogged - Clean the cooling fins.
Drive system overload - Reduce drive system load.

Drive system makes excessive noise
Wrong oil viscosity - Use the specified type of oil.
Air in the hydraulic system - Bleed air from system.
Hydraulic motor or drive pump failure - Change or repair faulty component.
Worn or defective mechanical components of drive system - Inspect the parts for defect or damage and repair as required.

Hydraulics Troubleshooting

Hydraulic system overheated
Hydraulic pressure is incorrect - Correct setting is required.
Faulty or improperly adjusted main relief valve - Replace or set up the relief valve.
Hydraulic fluid is contaminated - Change hydraulic fluid.
Not enough hydraulic oil in the system - Fill up the hydraulic oil.
Defective hydraulic pump - Repair or change pump if required.

Lift arm can't drop or lift
Damaged lift controls - Repair or change.
Hydraulic pump not working - Repair or install new hydraulic pump.
Damaged hydraulic control valve - Replace or repair the valve.
Faulty hydraulic cylinder - Install a new boom cylinder or repair it.
Low hydraulic fluid level - Fill up the hydraulic fluid.

Bucket is not working
Bucket controls failure - Repair or change.
Hydraulic pump is broken - Change or repair hydraulic pump if required.
Defective hydraulic control valve - Repair or replace the valve.
Bucket cylinder malfunction - Repair or replace cylinder.
Hydraulic oil is insufficient - Check and refill the hydraulic oil.

Slow bucket or lift arm operation
Hydraulic pump is defective - Check pump flow and install new pump if necessary.
Leaking hydraulic cylinder - Install new cylinder seals.
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Hydraulic control valve is not set properly or defective - Adjust properly or repair.
Hydraulic pressure is low - Correct adjustment is required.

Jerky operation of the bucket or boom
Air in hydraulic system - Bleed air from hydraulic system.
Clogged hydraulic oil filter element - Change or clean oil filter.
Hydraulic fluid is contaminated - The fluid must be changed.
Scored cylinder tube or rod - Replace failed component.

Hydraulic pump makes excessive noise
Lack of oil or hydraulic leakage - Remedy hydraulic leakage or refill oil as necessary.
Plugged hydraulic filter - Service or change hydraulic filter.
Suction line is dirty - Suction line needs to be cleaned.
Pump sucks air - Need to bleed air.
Worn pump parts - Install new hydraulic pump or rebuild it.

Electrical Troubleshooting

Battery cannot be charged
Electrical cable connections are corroded or loose - Clean or tighten connections.
Faulty battery terminal clamps - Install new terminal clamps.
Battery faulty cell - Battery change required.
Belt is loose or defective - Replace belt or adjust belt tension.

Starter motor turns slow
Low battery voltage - Charge the battery.
Battery will not hold charge - Service battery or replace it.
Bad terminals or disconnected battery cables - Check wiring connections and replace or clean terminals.

Starter motor is not working
Battery is low or faulty - Recharge or replace battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery output - Charge the battery.
Starter motor is faulty - Starter needs to be changed.