• All Manufacturers

  • Bobcat
  • Case
  • Caterpillar
  • Doosan
  • John Deere
  • Kubota
  • JCB
  • Komatsu

  Wheel Loaders

  • Bobcat L28
  • Cat 926M
  • Case 221D
  • John Deere 304H
  • Doosan DL280-7
  • Case 521E
  • Kubota R070
  • John Deere 624J

Home / Wheel Loaders / JCB Wheel Loaders / JCB 411 HT

JCB 411 HT Troubleshooting

The JCB 411 HT wheel loader is powered by 269 cu.in (4.4L) JCB EcoMAX T4F 4-cylinder turbocharged liquid-cooled diesel engine with a rated power of 109 hp (81.3 kW) at 2200 rpm. The JCB 411 HT is equipped with a 4-speed powershift transmission, power steering system, hydraulic wet disc brakes, and 15.5R25 standard tires. The open center hydraulic system has a gear pump with fluid flow rate of 13.3 gpm (50.6 lpm) or 19.2 gpm (72.6 lpm). The wheel loader has a rated operating capacity of 6720 lbs (3055 kg) and tipping load of 13440 lbs (6110 kg). The max lift height is 140.6 inches (3570 mm) to hinge pin, and boom breakout force is 13970 lbs (6350 kg).

Engine Troubleshooting

Engine starts up hard or will not start
Air in fuel system - Bleed fuel system.
Fuel filter plugged - Install new filter element.
Fuel injection nozzles are clogged or faulty - Change fuel injection nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Incorrect valve clearance - Check and adjust.
Fuel injection pump is not working correctly - Replace or repair injection pump.

Diesel starts but immediately stops
Clogged air cleaner - Clean or change cleaner.
Fuel filter element is clogged - Change filter element.
Fuel injection pump leakage - Check the fuel injection pump for leaks and fix it.
Fuel injectors are faulty or clogged - Inspect fuel injectors and change as required.
Fuel injection pump is faulty - Rebuild or change fuel pump.

Engine shuts off suddenly during operation
Engine not warmed up - Normalize the temperature by warming up the engine.
Fuel filter plugging - Change filter element.
Air in the fuel system - Air bleeding.
Faulty or dirty injection nozzles - Check injection nozzles and replace if required.
Improper setting of fuel injection pump timing - Set the fuel pump timing correctly.

Engine stalls at low idle speed
Too low idle RPM - Adjust low idling as recommended.
Fuel injection pump is not operating properly - Replace or rebuild injection pump.
Damaged or clogged injectors - Change or clean fuel injectors.
The valve clearance is not adjusted - Adjustment procedure required.

Diesel engine loses power
Air filter is plugged - Replace or clean air filter element.
Fuel injection nozzles fault - Test injection nozzles and change if necessary.
Improper fuel injection pressure - Correct the pressure settings.
The valve clearance is incorrect - Adjust valve clearance.
Improperly adjusted low idle speed - Adjust low idling as recommended.
Fuel lines or hoses clogging - Service fuel hoses and lines.
Damaged cylinder-head gasket - Replace cylinder head gasket.
Worn or broken piston rings - Piston rings replacement required.

Engine overheating
Insufficient coolant - Add coolant and check the components of cooling system.
Engine oil insufficient - Check and refill engine oil.
Radiator fins are clogged or radiator cap is faulty - Clean radiator or change cap.
Damaged or worn fan belt - Replace as required.
Diesel engine is overloaded - Load reducing is recommended.

Low oil pressure
Not enough oil in the engine - Add oil as required.
Dirty oil filter - Replace or service engine oil filter.
Oil grade or viscosity is wrong - Use oil of proper viscosity.
Crankshaft bearing oil clearance is incorrect - Bearings need to be reinstalled.
Oil pump is worn or damaged - Repair or change.

Engine noise or knocking
Low engine oil level - Add oil to the engine crankcase.
Engine not warmed up - Warm up engine as required.
Improper setting of fuel injection pump timing - Set up as recommended.
Low idle speed setting is not correct - Need to adjust idle speed.
Dirty or defective injectors - Replace or clean fuel injectors.
Connecting rod is misaligned or worn - Need to replace or align the connecting rod.
Worn or broken pistons - Install new pistons.

Transmission Troubleshooting

Transmission fluid pressure is insufficient
Lack of transmission fluid - Need to add transmission fluid.
Dirty transmission oil filter element (if equipped) - Clean or replace the transmission filter.
Relief valve is stuck - Replace the valve.

Transmission makes excessive noise
Low fluid level - Need to add transmission fluid.
Transmission oil is contaminated - Transmission oil change required.
Worn gears or incorrect backlash - Change the gears or set backlash properly.
Bearings are cracked or worn - Faulty bearings should be replaced.
Worn or bent shift forks - Shift forks need to be replaced.
Worn or stuck shaft splines - Change defective shaft.

Gear hard to shift
Gear shift linkage is corroded or worn - Install a new gear shift linkage.
Shift forks are bent or worn out - Shift forks need to be replaced.
Gear shifting mechanism is defective - Defective parts must be replaced.
Clutch is worn or not adjusted - Clutch adjustment or replacement required.

Transmission oil leaking
Transmission fluid level is exceeded - Excess fluid must be drained.
Damaged seals or gaskets - Seals and gaskets need to be replaced.

Hydraulics Troubleshooting

Hydraulic system overheated
Hydraulic pressure is not correct - Hydraulic pressure must be set correctly.
Defective or misadjusted main relief valve - Set up or change the relief valve.
Hydraulic fluid is contaminated - Change hydraulic fluid.
Lack of hydraulic oil - Add oil to the hydraulic system.
Defective hydraulic pump - Replace or repair pump if necessary.

Boom does not raise or lower
Lift controls failure - Repair or replace.
Damaged hydraulic oil pump - Repair or install new hydraulic pump.
Damaged hydraulic control valve - Repair or change hydraulic valve.
Hydraulic cylinder not working - Repair or change hydraulic cylinder.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.

Bucket won't move
Bucket tilt controls malfunction - Inspect and repair if necessary.
Defective hydraulic pump - Repair or replace pump if necessary.
Damaged hydraulic control valve - Repair or replace the valve.
Faulty hydraulic bucket cylinder - Change or repair cylinder.
Low hydraulic oil level - Need to add oil.

Slow boom or bucket action
Defective hydraulic pump - Check pump performance and change it if necessary.
Oil leaks from hydraulic cylinder - Replace cylinder piston seals.
Hydraulic oil is insufficient - Checking hydraulic oil level and add if necessary.
Hydraulic control valve is faulty or out of adjustment - Repair or adjust correctly.
Hydraulic system loosing pressure - Correct adjustment is required.

Lift arm or bucket is moving jerkily
Air trapped in hydraulic system - Need to bleed air.
Hydraulic oil filter is clogged - Service or change the hydraulic filter.
Hydraulic oil is dirty - Fill up with fresh hydraulic oil.
Cylinder tube or rod is scored - Replace worn component.

Hydraulic pump is excessively noisy
Hydraulic leakage or lack of oil - Correct hydraulic leaks or top up oil as needed.
Hydraulic filter is clogged - Replace or clean the filter.
Dirty suction line - Clean suction line as required.
Air enters the pump - Remove air from hydraulics.
Pump parts are faulty - Change or rebuild pump.

Electrical Troubleshooting

Battery does not charge
Corroded or loose wire connections - Tighten or service cable connections.
Battery terminal clamps are defective - Replace terminal clamps.
Defective battery - Battery change required.
Belt is worn or loose - Belt needs to be adjusted or changed.

Starter turning slow
Low battery output - Battery is drained, recharge it.
Battery will not hold charge - Service charging system or replace battery.
Disconnected battery cables or bad terminals - Connect wires correctly or change terminals.

Starter will not crank
Battery is discharged or worn - Battery needs to be recharged or replaced.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery voltage - Recharge the battery.
Damaged starter motor - Starter should be replaced.

____________________________________________________________________________________

WHEEL LOADERS SPECIFICATIONS

Wheel Loaders, Skid Steers, and Compact Track Loaders