Home / Farm Tractors / John Deere Tractors / JD 6910

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
Engine stops when idle
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
Engine overheating
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
Reduced engine power
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
Engine knocks or noises
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
Starter turns slow
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
Starter does not work
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
External fluid leaks
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




Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294