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John Deere 6910 Troubleshooting
The
John Deere 6910 is a 6000 Ten series four-wheel drive row crop tractor. This
model was manufactured from 1997 to 2001. The John Deere 6910 powertrain system
components: JD 6068T four-stroke 6-cylinder turbocharged diesel engine and 24x24
PowrQuad transmission with planetary gears, or PowerShift transmission with 18
forward and 7 reverse gears.
A 414 cu.in (6.8 L) engine output is 140 hp (104.4 kW), and maximum
torque is 610 Nm (450 lb-ft) at 1400 rev/min. Max. travel speed
(forward/reverse): 31.1 mph (50 km/h).
The closed center hydraulic system with load-sensing control has an
axial-piston or gear-driven pump with a rated capacity of 25.3 gallons
per minute (96 l/min). The hydraulic pressure is 200 bar (2900 psi). The
John Deere 6910 is equipped with a hydrostatic power steering system,
hydraulic brakes, 16.9R28 front tires, and 20.8R38 rear tires. The wheel
base is 104.3 in (2640 mm).
| Engine Troubleshooting |
| Engine will not start or starts up hard |
| Fuel filter plugging - Change filter element |
| No fuel injection - Open fuel cock to inject fuel |
| Air in fuel pipes - Bleed fuel pipes |
| Fuel injectors are clogged or faulty - Change fuel injectors |
| Fuel injection pump malfunctioning - Rebuild or replace pump |
| Engine has bad compression - Check cylinder block and replace damaged components |
| Engine stops unexpectedly while running |
| Engine is not warmed up to the required temperature - Engine is not warmed up to the required temperature |
| Air in fuel pipes - Bleed fuel pipes |
| Uneven fuel injections - Repair or adjustment |
| Fuel filter plugging - Install new filter element |
| Faulty or dirty injectors - Inspect fuel injectors and replace if necessary |
| Diesel starts but then shuts off |
| Incorrect setting of fuel injection pump timing - Check and correct adjustments |
| Plugged fuel filter - Change filter element |
| Dirty or defective injector nozzles - Change injector nozzles |
| Fuel injection pump failure - Repair or replace injection pump |
| Clogged air cleaner element - Service or replace the air cleaner |
| Incorrectly adjusted low idle speed - Adjust low idling as recommended |
| Fuel injection pump is damaged - Replace or rebuild injection pump |
| Fuel injector nozzles are faulty - Change or clean injector nozzles |
| Valve out of adjustment - Adjustment procedure required |
| Low engine coolant - Fill radiator to proper level. If there are leaks in the system, replace worn components |
| Cooling system components are failed or system is dirty - Service the cooling system or replace faulty components |
| Low engine oil level - Need to add engine oil |
| Worn fan belt or incorrect belt tension - Adjust correctly or change the belt |
| Defective thermostat - Thermostat needs to be replaced |
| Clogged or damaged injectors - Service or change fuel injectors |
| Incorrect fuel injection pressure - Adjust to proper pressure |
| Air filter element clogging - Replace or clean the air filter element |
| Oil filter element is dirty - Replace or service engine oil filter |
| Engine is under excessive load - Reduce the load or operate the tractor in lower gears |
| Valve clearance is wrong - Correct valve clearance |
| Incorrectly set low idle speed - Need to adjust idle speed |
| Clogged fuel pipes or hoses - Fuel hoses and pipes must be clean |
| Engine lost compression: Intake or exhaust valves are damaged - Install new valves |
| Incorrect setting of fuel injection pump timing - Correct injection timing |
| Fuel injector nozzles are dirty or defective - Service or replace nozzles if required |
| Not enough engine oil - Check oil level and add oil as required |
| Engine is not warmed up to the required temperature - Warm up the engine |
| Worn main bearings or crankshaft - Worn parts replacement required |
| Defective or broken piston rings - Replace the piston rings as required |
| Loose flywheel bolts - Check flywheel bolts and tighten properly |
| Diesel engine using too much oil |
| Oil leakage: Gaskets or seals can be faulty - Replace defective parts |
| Oil viscosity is wrong - Use oil of correct viscosity |
| Worn or stuck piston rings - Change piston rings |
| Damaged valve guides or valve stems - Valves must be replaced |
| Scored pistons or cylinder liners - Inspect liners and pistons, replace as necessary |
| Electrical System Troubleshooting |
| Battery is not charging |
| Battery dead cell - Battery change required |
| Damaged battery cable harness - Check electrical cables for damage, repair or replace |
| Loose or corroded battery cables and terminals - Tighten or service terminals and cables |
| Improper belt tension adjustment or damaged belt - Change belt or adjust belt tension properly |
| Battery voltage is low - Battery is drained, recharge it |
| Battery drains quickly - Service charging system or install new battery |
| Battery wiring harness damage - Inspect battery wiring for damage, replace or repair |
| Battery terminals and cables are corroded or loose - Service or tighten battery cables and terminals |
| Battery voltage is low - Recharge the battery |
| Drained or worn battery - Battery needs to be recharged or replaced |
| Faulty starter motor - Repair or install a new starter |
| Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required |
| Transmission Troubleshooting |
| Difficulty shifting gears |
| Failure or improper clutch adjustment - Clutch needs to be replaced or adjusted |
| Stuck or damaged gear shift linkage - Service or change the shift linkage |
| Bent or worn shift forks - Change defective shift forks |
| Gear shifting mechanism is worn - Change worn components |
| Transmission oil pressure is low |
| Fluid level is low - Add transmission fluid as required |
| Dirty transmission oil filter (if fitted) - Replace or clean transmission oil filter |
| Faulty relief valve - Install a new relief valve |
| Transmission makes excessive noise |
| Bearings are worn or damaged - Install new bearings |
| Low transmission oil level - Fill the transmission housing to proper oil level |
| Contaminated transmission fluid - Transmission fluid must be changed |
| Backlash is incorrect or gears are worn - Replace gears or set backlash correctly |
| Shift forks are damaged or worn - Install new shift forks |
| Gaskets or seals are damaged - Install new components |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| Improper hydraulic system pressure setting - Set the pressure properly |
| Faulty or incorrectly adjusted main relief valve - Replace or set up the relief valve |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Air trapped in the hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic fluid pressure too low |
| Lack of hydraulic fluid - Check and refill the hydraulic fluid |
| Hydraulic oil filter clogging - Service or replace the hydraulic filter |
| Damaged hydraulic oil pump - Flow-rate hydraulic pump and replace pump if necessary |
| Hydraulic spool valve is defective or set improper - Replace or set properly |
| Faulty hydraulic cylinder - Inspect cylinder components for wear or damage and change if required |
| Hydraulic pipes are leaking - Detect leaks in hydraulic system and repair it |
| Hitch cannot be lifted or lifting is too slow |
| Lack of hydraulic fluid - Need to add fluid |
| Hydraulic oil is too cold - Allow oil to warm |
| Hydraulic oil filter clogging - Change the hydraulic filter element or service if required |
| Defective hydraulic pump - Check pump flow and change pump if necessary |
| Main relief valve malfunction or incorrect adjustment - Adjust or replace the relief valve |
| Defective or incorrect setting hydraulic control valve block - Replace or set correctly |
| Hydraulic cylinder is not working - Check cylinder parts for damage or wear and replace if necessary |
| Loose or damaged suction line - Tighten or replace |
| Hitch can't drop or drops too slowly |
| Defective or not adjusted hydraulic control valve - Set correctly or replace |
| Hydraulic cylinder is faulty - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Lift arm shaft is worn - Replace the shaft |
| Hitch has mechanical defects - Replace faulty or worn hitch components |
| Hitch jerks when lower or lift |
| Air in hydraulic system - Inspect the pump seals, suction line, and fittings |
| Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
| Hydraulic pump is faulty - Test the pump performance and change pump if required |
| Hydraulic control valve block is faulty or out of adjustment - Set properly or replace |
| Hydraulic cylinder is defective - Inspect cylinder components for wear or damage and change if required |
| Steering System Troubleshooting |
| Excessive effort to steer |
| Steering column is worn or incorrectly mounted - Change the steering column or mount it correctly |
| Air in steering system - Need to bleed air |
| Toe-in adjustment is incorrect - Adjust toe-in wheels properly |
| Tires are incorrectly inflated - Inflate as required |
| Damaged hydraulic steering pump - Replace or repair steering pump |
| Worn or defective hydrostatic steering unit - Repair or replace the steering unit |
| Steering oil level low - Add oil to steering system |
| Oil leakage in the steering system - Tighten the steering line and hose joints |
| Steering wheel free play is excessive |
| Steering column coupling or shaft has maximum wear - Change defective component |
| Defective or worn hydrostatic steering unit - Repair or replace the steering unit |
| Damaged hydraulic steering pump - Replace or repair steering pump |
| Worn or faulty steering tie-rod ends or linkage - Change failed component |
| Tractor pulls to right or left |
| Tire pressure is not correct - Check tire pressure and inflate as required |
| Improper toe-in - Adjust toe-in wheels properly |
| Steering tie-rod ends or linkage are defective - Replace damaged component |
| Hydrostatic steering unit is defective or worn - Repair or change the steering unit |
| Steering cylinder is worn - Change or repair hydraulic steering cylinder |
| Front hub bearings are incorrectly adjusted or worn - Install new bearings or adjust it correctly |
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| Farm Tractors Technical Specifications |
