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John Deere 3640 Troubleshooting

The John Deere 3640 is a 4-wheel drive utility tractor. This model was manufactured between 1984 and 1987. The John Deere 3640 tractor is equipped with a 359 cubic inches JD 6359D 4-cycle 6-cylinder direct injection liquid cooled diesel engine rated at 117 hp (87.2 kW).

The maximum torque is 393 Nm (290 lb-ft) at 1400 rpm. The Power Synchron transmission consists of a hydraulic clutch with a cerametallic dry disc and partial power shift gearbox with 16 forward and 8 reverse speeds. The maximum forward speed - 19 mph (30.6 km/h), max. reverse speed - 8.5 mph (13.7 km/h).

The closed center constant pressure hydraulic system used a piston pump with a flow rate of 11.9 gpm (44 lpm). The hydraulic system pressure is 170 bar (2470 psi). The John Deere 3640 is equipped with a power steering system, hydraulic wet disc brakes, 12.4x28 or 13.6x28 front tires, and 16.9x38 or 18.4x38 rear tires. The wheelbase is 102 inches (2590 mm).

Engine Troubleshooting
Engine hard starting or not starting
Dirty fuel filter element - Change filter element
Closed fuel supply valve - Open supply valve to inject fuel
Fuel lines leaking air - Tighten clamps, change faulty pipes
Fuel injectors are damaged or dirty - Change fuel injectors
Fuel injection pump damage - Install a new pump or rebuild
Low compression - Inspect and replace faulty parts
Engine stops during operation
Engine is cold - Warm up to required temperature
Air in fuel pipes - Bleed fuel pipes
Uneven fuel injections - Repair or adjustment
Fuel filter is clogged - Replace filter element
Fuel injectors are clogged or faulty - Service or change fuel injectors
Diesel starts but then stalls
Timing of fuel injection pump is wrong - Check and correct settings
Clogged fuel filter element - Service the filter
Fuel injector nozzles are defective or dirty - Install a new set of well-balanced nozzles
Defective fuel injection pump - Repair or change injection pump
Air cleaner element clogging - Replace or service air cleaner element
Engine stalls while idle
Improperly adjusted low idle speed - Adjust low idle speed
Damaged fuel injection pump - Install a new fuel pump or repair
Damaged or clogged injector nozzles - Change or clean injector nozzles
The valve clearance is incorrect - Adjustment procedure required
Engine overheated
Insufficient coolant - Fill cooling system to proper level. Check the components of cooling system
Cooling system is clogged or cooling parts are worn - Service the cooling system or replace faulty components
Engine oil level is low - Fill the crankcase with engine oil
Fan belt tension is incorrect or belt is defective - Adjust properly or replace the belt
Defective thermostat - Replace the thermostat
Engine loses power
Clogged fuel injectors - Change fuel injectors
Fuel injection pressure is incorrect - Test fuel injection pressure and adjust it correctly
Dirty air filter element - Install new filter element or replace it
Oil filter element clogged - Service or change engine oil filter element
Engine overloaded - Change to lower gear or reduce load
The valve clearance is not adjusted - Adjust valve clearance
Incorrectly adjusted low idle speed - Normalize low idle speed
Clogged fuel hoses or pipes - Fuel pipes and hoses need to be cleaned
Loss of compression: Leaking or faulty valves - Valve replacement required
Abnormal engine noise or knocking
Unadjusted fuel injection pump timing - Adjust injection timing
Fuel injector nozzles are damaged - Replace fuel injector nozzles
Engine oil level is low - Checking oil level and add if necessary
Engine not warmed up - Warm up the engine
Worn main bearings or crankshaft - Change defective components as required
Stuck or worn piston rings - Replace piston rings
Flywheel screws are loose - Tighten the screws firmly
Engine using too much oil
Oil leakage: Damaged gaskets or seals - To repair leaks, replace worn parts
Improper oil viscosity - Fill up with the correct oil viscosity
Worn or broken piston rings - Piston rings need to be replaced
Worn valve guides and valve stems - Replace the valves
Damaged pistons or cylinder liners - Check pistons and liners, install new parts as required

Electrical System Troubleshooting
Battery is not charging
Dead cell in battery - Replace the battery
Bad battery cable harness - Inspect cables for malfunctions, repair or change
Corroded or loose battery cables and terminals - Clean or tighten cables and terminals
Worn belt or improperly adjusted belt tension - Replace belt or correctly adjust belt tension
Starter motor turns slow
Low battery power - Battery is drained, recharge it
Battery won’t hold charge - Service charging system or change battery
Battery wiring harness failure - Inspect electrical cables for defects, repair or replace
Battery cables and terminals are loose or corroded - Tighten or clean cables and terminals
Starter will not crank
Low battery output - Recharge the battery
Discharged or worn battery - Recharge or change battery
Starter motor is faulty - Starter should be replaced
Improperly connected or disconnected cables - Check battery cables and connect properly

Transmission Troubleshooting
Difficult to shift gears
Clutch is unadjusted or worn - Clutch needs to be adjusted or changed
Gear shift linkage is loose or broken - Service or change the shift linkage
Bent or worn shift forks - Install new shift forks
Gearshift mechanism failure - Change or repair failed components
Low transmission fluid pressure
Insufficient fluid supply - Fill system with correct transmission fluid level
Transmission oil filter element is dirty (if fitted) - Replace or service transmission oil filter
Relief valve is defective - Replace valve as required
Transmission noises
Broken or worn bearings - Bearings need to be changed
Lack of transmission fluid supply - Add transmission fluid as required
Contaminated transmission oil - Fill up with fresh transmission oil
Improper backlash or damaged gears - Change damaged gears or adjust backlash properly
Bent or worn shift forks - Change defective shift forks
External oil leaks
Worn gaskets or seals - Install new components
Transmission housing is cracked - Replace housing or transmission assembly

Hydraulics Troubleshooting
Hydraulic system overheats
Incorrect hydraulic pressure adjustments - Adjust correctly
Main relief valve is faulty or misadjusted - Adjust or replace the relief valve
Hydraulic fluid contamination - Change hydraulic fluid
Air leaks in hydraulic system - Check the suction pipe, fittings, and pump seals
Hydraulic fluid pressure is insufficient
Hydraulic fluid level is low - Fill the hydraulic system with oil
Hydraulic fluid filter is clogged - Change hydraulic filter element or clean if necessary
Hydraulic pump is faulty - Check pump performance and change it if necessary
Faulty or incorrect setting hydraulic spool valve - Change or adjust properly
Hydraulic cylinder failure - Check cylinder components for damage or wear and change if necessary
Leakage in hydraulic pipes - Find leaks in hydraulic system and repair it
Hitch cannot be raised or raising is too slowly
Lack of hydraulic oil - Fill up the hydraulic oil
Cold hydraulic fluid - Warm up the fluid
Hydraulic oil filter element is dirty - Clean or change hydraulic filter
Faulty hydraulic oil pump - Check pump performance and change it if necessary
Main relief valve is faulty or misadjusted - Adjust the valve or replace if necessary
Hydraulic spool valve is not set properly or defective - Change or adjust properly
Broken hydraulic cylinder - Inspect cylinder components for wear or damage and change if required
Damaged or loose hydraulic suction line - Tighten or change it
Hitch drops too slowly or can't drop
Damaged or incorrect adjusted hydraulic spool valve - Adjust correctly or change
Hydraulic cylinder failure - Check the hydraulic cylinder parts for damage or wear and replace if necessary
Damaged hitch cross shaft - Replace the shaft
Internal mechanical failure of the hitch - Replace worn or defective hitch parts
3-point hitch lift or lower is jerky
Air trapped in the hydraulic system - Check the pump seals, suction line, and fittings
Hydraulic fluid contamination - Change hydraulic fluid
Defective hydraulic pump - Test the pump performance and change pump if required
Defective or not adjusted hydraulic control valve - Replace or set properly
Hydraulic cylinder is faulty - Check cylinder components for wear or damage and change if necessary

Steering System Troubleshooting
Difficult steering
Defective or incorrectly installed steering column - Reinstall the steering column or change it
Air in steering system - Bleed the steering system
Toe-in adjustment is incorrect - Check toe-in and correct
Tires are deflated - Need to inflate tires
Steering pump is faulty - Check the hydraulic steering pump and change if necessary
Hydrostatic steering unit is damaged or worn - Inspect and change as required
Relief valve is stuck or faulty - Install a new relief valve or clean it
Low steering fluid level - Fill the steering system with fluid
Oil leaks in the steering system - Tighten the steering hose and pipe joints
Steering wheel free play is excessive
Steering column coupling or shaft is extremely worn out - Replace defective component
Faulty or worn hydrostatic steering unit - Repair or replace the steering unit
Hydraulic steering pump is defective - Repair or replace steering pump
Steering linkage or tie-rod ends are worn - Change damaged part
Tractor pulls to right or left
Deflated front tyres - Inflate tyres as needed
Incorrect toe-in adjustment - Check toe-in and correct
Steering tie-rod ends or linkage are worn - Replace failed part
Damaged or worn hydrostatic steering unit - Repair or replace the steering unit
Damaged steering cylinder - Change or repair hydraulic steering cylinder
Front hub bearings are damaged or incorrectly adjusted - 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