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John Deere 7810 Troubleshooting
The
John Deere 7810 is a 2WD or 4WD row-crop tractor from 7010 series. This model
was manufactured between 1997 and 2003. The JD 7810 tractor is powered by 496
cubic (8.1 L) John Deere 6081T 6-cylinder turbocharged direct injection diesel
engine. The engine has a cylinder bore of 4.56" (116 mm), piston stroke of 5.06"
(129 mm), and rated power of 175 hp (130.5 kW).
The John Deere 7810 is fitted with three types of transmission: 16x16
PowrQuad partial powershift transmission, 20x20 AutoQuad planetary gears
transmission, or PowerShift transmission with 19 forward and 7 reverse
gears.
The maximum travel speed (forward/reverse): 23.6 mph (38 km/h). The
closed center pressure/flow compensated hydraulic system includes a
variable displacement axial piston pump with a rated capacity of 26 gpm
(98.4 lpm). The main relief pressure is 200 bar (2900 psi). The 2WD
models are equipped with 11.00x16 front tires and 18.4R38 rear tires.
The 14.9R28 front tires and 18.4R38 rear tires are used for 4WD
tractors. The wheel base is 114.4" (2900 mm) for 2-wheel drive models
and 110.2" (2790 mm) for 4-wheel drive models.
| Engine Troubleshooting |
| Engine doesn't start or hard to start |
| Fuel filter clogging - Clean or replace the filter |
| Closed fuel supply valve - Open supply valve to inject fuel |
| Air in fuel system - Air-bleed fuel system |
| Fuel injectors are damaged or dirty - Test fuel injectors and change if necessary |
| Fuel injection pump is damaged - Repair or install a new fuel pump |
| Poor engine compression - Inspect cylinder block and change worn parts |
| Engine stalls while running |
| Coolant temperature is low - Warm up engine as required |
| Air trapped in fuel system - Bleed air |
| Bad fuel injection - Check and adjust |
| Plugged fuel filter - Replace the filter element |
| Faulty or dirty injectors - Inspect fuel injectors and replace if necessary |
| Diesel engine stops after starting |
| Incorrectly set fuel injection pump timing - Check the fuel injection pump timing setting |
| Plugged fuel filter - Clean the filter or install new filter element |
| Clogged or defective injector nozzles - Change or clean injector nozzles |
| Fuel injection pump is damaged - Replace or repair injection pump |
| Clogged air cleaner - Install new cleaner element or replace it |
| Engine stalls when idling |
| Low idle speed setting is incorrect - Correct the settings |
| Fuel injection pump failure - Repair or replace injection pump |
| Fuel injector nozzles are damaged - Install new set of properly balanced nozzles |
| Valve clearance is out of adjustment - Check and adjust |
| Insufficient coolant fluid - Fill the radiator to the required level. Check radiator and hoses for leaks |
| Cooling system is dirty or cooling components are failed - Change faulty components or flush the cooling system |
| Engine oil level low - Fill up the engine oil |
| Worn fan belt or improper belt tension - Adjust as required or replace belt |
| Thermostat fault - Check and replace if required |
| Fuel injectors are defective or dirty - Inspect fuel injectors and replace if necessary |
| Incorrect fuel injection pressure - Repair or replace injection pump |
| Air filter element clogging - Service or change air filter |
| Engine oil filter is plugged - Service or change engine oil filter element |
| Engine is running overloaded - Change to lower gear or reduce load |
| Incorrect valve clearance - Correct valve clearance needs to be set |
| Incorrect low idle setting - Normalize low idle speed |
| Dirty fuel pipes or hoses - Fuel pipes and hoses need to be cleaned |
| Loss of compression: Valves are faulty or leaking - Replace the valves as required |
| Incorrectly set fuel injection pump timing - Check the fuel injection pump timing setting |
| Clogged or defective injector nozzles - Check and change nozzles as required |
| Engine oil insufficient - Need to add engine oil |
| Engine is cold - Warm up engine as required |
| Worn crankshaft or main bearings - Have bearings or crankshaft replaced |
| Broken or defective piston rings - Install new piston rings |
| Loose flywheel bolts - Check flywheel bolts and tighten properly |
| Diesel engine using too much oil |
| External oil leaks: Worn gaskets or seals - Worn parts need to be replaced |
| Crankcase oil too light - Use proper viscosity oil |
| Worn or broken piston rings - Install new piston rings |
| Worn valve stems and valve guides - Valves replacement required |
| Cylinder liners or pistons are scuffed - Inspect liners and pistons, change as necessary |
| Electrical System Troubleshooting |
| Battery does not charge |
| Battery is worn - Battery replacement required |
| Battery cable harness damage - Check battery cables for damage, change or repair |
| Battery terminals and cables are corroded or loose - Terminals and cables need to be tightened or cleaned |
| Damaged belt or incorrectly adjusted belt tension - Replace belt or adjust belt tension correctly |
| Low battery voltage - Battery is drained, recharge it |
| Battery runs out quickly - Service charging system or replace battery |
| Bad battery electrical wire harness - Check wires for malfunctions, repair or replace |
| Loose or corroded battery cables and terminals - Terminals and cables need to be tightened or cleaned |
| Low battery power - Battery is drained, recharge it |
| Drained or worn battery - Charge or change the battery |
| Starter motor is damaged - Starter needs to be replaced |
| Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly |
| Transmission Troubleshooting |
| Gear shift is hard |
| Misadjusted or defective clutch - Replace or adjust clutch |
| Gear shift linkage is stuck or damaged - Replace or repair the shift linkage |
| Damaged or worn shift forks - Replace the shift forks |
| Worn gear shift mechanism - Replace worn components |
| Low transmission oil pressure |
| Low transmission oil level - Fill up the transmission oil |
| Transmission fluid filter is dirty (if equipped) - Change or service the transmission fluid filter |
| Damaged relief valve - Replace relief valve as required |
| Bearings are worn or damaged - Change the bearings |
| Oil level is low - Correct the transmission oil level |
| Transmission oil contamination - Transmission oil must be changed |
| Defective gears or incorrect backlash - Replace gears or set backlash correctly |
| Worn or damaged shift forks - Shift forks need to be replaced |
| Seals or gaskets are damaged - Gaskets or seal replacement required |
| Transmission case is cracked - Replace case or transmission assembly |
| IVT Transmission Troubleshooting |
| IVT transmission makes noise |
| Dirty transmission oil or insufficient oil level - Top up to proper level or change oil |
| Defective or out of adjustment speed control rod linkage - Replace rod linkage or adjust correctly |
| Relief valve failure - Replace the valve |
| Excessive transmission load - Reduce the load is required |
| Defective or worn components of IVT transmission - After disassembling and checking, change defective parts |
| Not enough fluid in transmission - Fill the transmission housing with fluid |
| Transmission oil filter is plugged - Change or clean the transmission oil filter |
| Clogged or damaged cooling components - Inspect all cooling components and service or replace if necessary |
| Transmission overloaded - Reduce loading |
| Low transmission oil level - Fill up the transmission oil |
| Insufficient charge pressure - Check charge pressure |
| Relief valve is worn or defective - Replace valve as required |
| Worn gaskets or seals - Install new components |
| Internal transmission case pressure is too high - Replace defective components |
| Plugged oil drain pipe - Service or change drain pipe |
| Hydraulics Troubleshooting |
| Hydraulic system overheating |
| Incorrect hydraulic system pressure setting - Change the pressure settings |
| Main relief valve is faulty or misadjusted - Set up or change the relief valve |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Air enters in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic fluid pressure is insufficient |
| Hydraulic oil level is low - Add oil to the hydraulic system |
| Hydraulic oil filter is dirty - Change the hydraulic filter element or service if required |
| Hydraulic pump is defective - Test the pump performance and change pump if required |
| Hydraulic control valve block is not set properly or defective - Change or adjust properly |
| Broken hydraulic cylinder - Inspect cylinder components for wear or damage and change if required |
| Leakage in hydraulic lines - Detect leaks in the system and fix it |
| Three-point hitch lifting is too slow or cannot be lifted |
| Lack of hydraulic fluid - Check and refill the hydraulic fluid |
| Cold oil in hydraulic system - Wait for oil to warm up |
| Hydraulic fluid filter element is dirty - Clean or replace the hydraulic filter |
| Hydraulic pump failure - Check the pump performance and replace it if required |
| Defective or misadjusted main relief valve - Adjust relief valve or change if required |
| Hydraulic control valve block is faulty or out of adjustment - Replace or set properly |
| Hydraulic cylinder is faulty - Check cylinder parts for wear or damage and replace if necessary |
| Disconnected or damaged suction pipe - Connect or replace |
| Hitch not dropping or hitch drops slowly |
| Faulty or incorrect setting hydraulic control valve - Adjust correctly or replace |
| Broken hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Damaged lift arm shaft - Install a new shaft |
| The hitch has any internal mechanical damage - Replace defective or worn hitch components |
| 3-point hitch lift or lower is jerky |
| Air enters in hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic oil is dirty - Hydraulic oil change required |
| Hydraulic pump malfunction - Test pump flow rate and replace pump if required |
| Hydraulic control valve is faulty or out of adjustment - Adjust correctly or replace |
| Defective hydraulic cylinder - Check cylinder components for damage or wear and change if necessary |
| Steering System Troubleshooting |
| Heavy steering |
| Steering column is worn or incorrectly mounted - Change the steering column or mount it correctly |
| Air enters in steering system - Need to bleed air |
| Incorrect toe-in adjustment - Adjust toe-in wheels properly |
| Tires are improperly inflated - Inflate as necessary |
| Worn steering pump - Install a new steering pump |
| Faulty or worn steering control valve - Repair or replace the steering valve |
| Relief valve seizing or failure - Inspect relief valve and replace if necessary |
| Steering oil level low - Add oil to steering system |
| Oil leaks in the steering system - Tighten the steering hose and line joints |
| Steering wheel free play is excessive |
| Steering column shaft or coupling has maximum wear - Change defective part |
| Defective or worn steering control valve - Repair or replace the steering valve |
| Steering pump is faulty - Repair or change steering pump |
| Worn or faulty steering tie-rod ends or linkage - Change damaged part |
| Tractor pulls to left or right |
| Tire pressure is low - Tires need to be inflated |
| Improper toe-in adjustment - Check and adjust toe-in |
| Steering tie-rod ends or linkage are defective - Change damaged component |
| Steering control valve has wear or malfunction - Repair or replace the steering valve |
| Faulty steering cylinder - Repair or change steering cylinder |
| Incorrectly adjusted or damaged front hub bearings - Change or adjust the bearings properly |
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| Farm Tractors Technical Specifications |
