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John Deere 7710 Troubleshooting
The
John Deere 7710 row-crop tractor was manufactured from 1997 to 2003. The JD 7710
tractor is powered by John Deere 6081T 4-stroke 6-cylinder direct injection
turbocharged diesel engine with a maximum output power of 155 hp (115.6 kW) and
708 Nm (522 lb-ft) of peak torque at 1400 rev/min.
The John Deere 7710 is fitted with a 3 types of transmission. 1st type:
16x16 PowrQuad partial powershift transmission. 2nd type: 19x7
PowerShift transmission. 3rd type: 20x20 AutoQuad transmission. Maximum
travel speed (forward/reverse): 23.6 mph (38 km/h).
The closed-center, pressure and flow compensated hydraulic system used a
variable displacement axial-piston pump with a flow of 26 gal/min (98.4
l/min). The hydraulic pressure is 200 bar (2900 psi). The 2-wheel drive
models are equipped with 11.0x16 front tires and 18.4x38 rear tires. The
14.9x28 front tires and 18.4x38 rear tires are used for tractors with
4-wheel drive. The wheel base is 114.4" (2900 mm) for 4x2 (2WD) models
and 110.2" (2790 mm) for 4x4 (4WD) models.
| Engine Troubleshooting |
| Engine will not start or starts up hard |
| Fuel filter plugging - Install new filter element |
| The fuel shut-off valve is closed - Open fuel shut-off valve |
| Air trapped in fuel system - Bleed air |
| Dirty or damaged injectors - Service or change fuel injectors |
| Fuel injection pump is defective - Repair or install new pump |
| Low compression - Check cylinder block and change faulty parts |
| Diesel shuts off during operation |
| Engine is not fully warmed up - Normalize the temperature by warming up the engine |
| Air in fuel system - Air-bleed fuel system |
| Fuel injection failed - Use correct settings |
| Fuel filter plugging - Service the filter |
| Clogged or damaged injectors - Change fuel injectors |
| Engine starts and then stalls |
| Fuel injection pump timing is incorrect - Adjust injection timing |
| Fuel filter plugging - Service or replace the filter |
| Fuel injector nozzles are damaged - Inspect injector nozzles and change if required |
| Fuel injection pump failure - Repair or install new pump |
| Air cleaner element is dirty - Clean or replace the air cleaner element |
| Engine stalls while idling |
| Low idle speed adjustment is incorrect - Adjustment required |
| Fuel injection pump is damaged - Repair or install a new fuel pump |
| Fuel injector nozzles are damaged or dirty - Change injector nozzles |
| Valve clearance is out of adjustment - Need to adjust valve clearance |
| Not enough coolant - Coolant needs to be refilled. Any leaks must be repaired |
| Cooling system components are worn or system is clogged - Flush cooling system or replace faulty parts |
| Not enough engine oil - Check and refill engine oil |
| Fan belt is worn or belt tension is improper - Adjust correctly or change the belt |
| Defective or wrong type of thermostat - Replace the thermostat |
| Faulty or dirty injectors - Change fuel injectors |
| Insufficient fuel injection pressure - Check the fuel injection pressure and adjust if necessary |
| Clogged air filter element - Replace or service air filter element |
| Dirty oil filter - Change or service engine oil filter |
| Engine overload - Reduce engine load |
| The valve clearance is not adjusted - Adjust to proper valve clearance |
| Low idle speed setting is not correct - Test and adjust |
| Restricted fuel hoses or pipes - Service fuel hoses and pipes |
| Engine losing compression: Leaking or faulty valves - Valve replacement required |
| Unadjusted fuel injection pump timing - Check and correct adjustments |
| Clogged or damaged injector nozzles - Test injector nozzles and replace as required |
| Lack of engine oil - Check and refill engine oil |
| Low coolant temperature - Warm up to required temperature |
| Worn main bearings or crankshaft - Replace crankshaft or bearings |
| Piston rings are worn or broken - Replace the piston rings as required |
| Loose flywheel screws - Check the flywheel screws and tighten as required |
| Diesel engine using too much oil |
| Oil leaking: Damaged gaskets or seals - Defective components must be replaced |
| Incorrect oil viscosity - Use oil of proper viscosity |
| Stuck or defective piston rings - Piston rings need to be replaced |
| Valve guides and stems are worn - Valves need to be changed |
| Worn pistons or cylinder liners - Inspect pistons and liners, change as required |
| Electrical System Troubleshooting |
| Battery will not charge |
| Bad cell in battery - Replace the battery |
| Bad battery electrical wire harness - Check wires for malfunctions, repair or replace |
| Battery cables and terminals are corroded or loose - Clean or tighten cables and terminals |
| Belt is worn or belt tension is incorrectly adjusted - Change belt or correctly adjust belt tension |
| Starter motor cranks slow |
| Low battery output - Charge the battery |
| Battery discharges quickly - Service charging system or install new battery |
| Damaged battery cable harness - Check electrical cables for damage, repair or replace |
| Corroded or loose terminals and cables - Cables and terminals must be tightened or cleaned |
| Battery capacity is low - Charge the battery |
| Discharged or faulty battery - Replace or charge as required |
| Starter motor failure - Starter should be changed |
| Wiring is improperly connected or disconnected - Need to reconnect the wiring properly |
| Transmission Troubleshooting |
| Hard shifts |
| Clutch is unadjusted or worn - Adjust correctly or replace |
| Loose or broken gear shift linkage - Change or repair shift linkage |
| Worn or damaged shift forks - Change defective shift forks |
| Defective gearshift mechanism - Replace defective components |
| Transmission fluid pressure is insufficient |
| Lack of transmission fluid supply - Fill up the transmission fluid |
| Transmission fluid filter is plugged (if fitted) - Clean or replace the transmission fluid filter |
| Relief valve is faulty - Install a new relief valve |
| Excessive transmission noise |
| Damaged or worn bearings - Faulty bearings should be changed |
| Not enough fluid in transmission - Fill up the transmission fluid |
| Dirty transmission fluid - Change transmission fluid |
| Gears are defective or backlash is incorrect - Change worn gears or set backlash correctly |
| Shift forks are damaged or worn - Change the shift forks |
| Transmission fluid leakage |
| Worn gaskets or seals - Install new components |
| Transmission housing is cracked - Replace housing or transmission assembly |
| IVT Transmission Troubleshooting |
| IVT transmission is excessively noisy |
| Contaminated oil or low oil level - Fill the transmission with fresh oil or add transmission oil to the correct level |
| Defective or out of adjustment speed control rod linkage - Adjust or change rod linkage |
| Relief valve is faulty - Install a new valve |
| Transmission is under excessive load - The load should be reduced |
| Worn or damaged transmission components - Change or repair damaged parts |
| Transmission fluid overheated |
| Insufficient oil supply - Checking transmission oil level and add if necessary |
| Transmission fluid filter is dirty - Change or clean the transmission fluid filter |
| Cooling components are defective or plugged - Check all cooling components and change or clean if required |
| Transmission overload - Reduce transmission load |
| Lack of transmission fluid supply - Fill up the transmission fluid |
| Low charge pressure - Check charge pressure |
| Worn or defective relief valve - Change the valve |
| Broken gaskets or seals - Change defective seal or gaskets |
| High pressure inside the transmission housing - Repair or replace worn parts |
| Plugged oil drain pipe - Service or change drain pipe |
| Hydraulics Troubleshooting |
| Hydraulic system overheats |
| The system pressure has not been corrected - Make the correct settings |
| Defective or misadjusted main relief valve - Adjust or replace the relief valve |
| Hydraulic oil contamination - Change the oil |
| Hydraulic system sucks air - Check the pump seals, suction pipe, and fittings |
| Hydraulic fluid pressure too low |
| Lack of hydraulic fluid - Need to add fluid |
| Hydraulic fluid filter element clogging - Install a new hydraulic filter element |
| Defective hydraulic pump - Check pump performance and change it if necessary |
| Hydraulic control valve block is faulty or out of adjustment - Adjust correctly or change |
| Hydraulic cylinder is broken - Inspect cylinder parts for wear or damage and replace if required |
| Leakage in hydraulic pipes - Inspect hydraulic system for leaks and repair it |
| 3-point hitch raises slowly or won't raise |
| Hydraulic fluid level is low - Add fluid to the hydraulic system |
| Cold fluid in hydraulic system - Wait for fluid to warm up |
| Hydraulic oil filter element is dirty - Hydraulic filter maintenance required |
| Hydraulic pump is faulty - Test the pump performance and change pump if required |
| Main relief valve is defective or unadjusted - Adjust relief valve or change if required |
| Hydraulic spool valve is defective or set improper - Change or set correctly |
| Faulty hydraulic cylinder - Check cylinder components for damage or wear and change if necessary |
| Damaged or loose suction line - Tighten or change |
| 3-point hitch fails to drop or drops slowly |
| Hydraulic spool valve is defective or set improper - Set properly or replace |
| Hydraulic cylinder failure - Inspect the hydraulic cylinder components for damage or wear and change if required |
| Damaged hitch cross shaft - Install a new shaft |
| The hitch has mechanical faults - Replace worn or damaged hitch parts |
| Hitch lower or lift is jerky |
| Air trapped in the hydraulic system - Check the pump seals, suction pipe, and fittings |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Hydraulic pump not working - Test pump performance and replace pump if necessary |
| Faulty or incorrect setting hydraulic spool valve - Replace or set correctly |
| Hydraulic cylinder failure - Check cylinder components for wear or damage and change if necessary |
| Steering System Troubleshooting |
| Steering wheel is difficult to turn |
| Steering column is defective or improperly assembled - Change steering column or assemble properly |
| Aeration in steering system - Air-bleed steering system |
| Incorrect toe-in - Adjust toe-in correctly |
| Low tire pressure - Inflate the tires |
| Faulty steering pump - Repair or replace steering pump |
| Damaged or worn steering control valve - Repair or change the steering valve |
| Relief valve sticking or malfunction - Check relief valve and change if required |
| Steering fluid level is low - Check fluid level and add steering fluid as required |
| Oil leakage in the steering system - Retighten joints of the hydraulic steering pipes and hoses |
| Steering wheel free play is excessive |
| Worn steering column coupling or shaft - Change faulty part |
| Faulty or worn steering control valve - Replace or repair steering valve as required |
| Hydraulic steering pump is defective - Repair or replace steering pump |
| Steering tie-rod ends or linkage are worn - Replace damaged part |
| Tractor pulls to left or right |
| Tires are deflated - Need to inflate tires |
| Incorrect toe-in - Adjust toe-in properly |
| Faulty or worn steering linkage or tie-rod ends - Replace failed part |
| Defective or worn steering control valve - Inspect and change as required |
| Steering cylinder is worn - Change or repair hydraulic steering cylinder |
| Defective or improperly adjusted front hub bearings - Install new bearings or adjust it correctly |
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| Farm Tractors Technical Specifications |
