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Ford 6600 Tractor Troubleshooting

The Ford 6600 is a 2WD or 4WD utility tractor. This model was manufactured from 1975 to 1981. The Ford 6600 tractor is powered by 256 cu.in (4.2 L) Ford four stroke 4-cylinder liquid-cooled diesel engine.

The engine has a cylinder bore of 4.4" (112 mm), piston stroke of 4.2" (107 mm), and rated power of 75.5 hp (56.3 kW). The Ford 6600 is fitted with two types of transmission. 1st type: 8x2 gear transmission. 2nd type: 16x4 Dual Power two-speed powershift transmission.

The maximum travel speed (forward and reverse): 17.4 mph (28 km/h) / 8.4 mph (13.5 km/h). The open center hydraulic system used a gear pump with a flow of 9.7 gpm (36.8 lpm). The hydraulic pressure is 145 bar (2100 psi). The tractor was equipped with a power steering system, differential mechanical wet disc brakes, 7.50x16 front tires, and 16.9x30 rear tires. The wheelbase is 88 in (2230 mm).

The Ford 6600 is compatible with the following attachments: Ford 772 loader with lift capacity to full height of 2460 lbs (1115 kg), Ford 774 loader with lift capacity to max height of 2000 lbs (907 kg), and Ford 772QT loader with lift capacity to max height of 2500 lbs (1134 kg).

Engine Troubleshooting
Engine will not start or starts up hard
Clogged fuel filter element - Service or replace the filter
The fuel shut-off valve is closed - Open fuel shut-off valve
Air in fuel pipes - Bleed fuel pipes
Clogged fuel injectors - Clean or replace fuel injectors
Fuel injection pump is not operating properly - Install a new fuel pump or repair
Bad compression - Check cylinder block and replace damaged components
Engine shuts off while driving
Engine is not preheated - Normalize the engine temperature
Air in fuel system - Air-bleed fuel system
Bad fuel injection - Check and adjust
Clogged fuel filter element - Clean or replace the filter
Dirty or damaged injectors - Change fuel injectors
Diesel starts and stalls suddenly
Timing of fuel injection pump is wrong - Check and correct settings
Plugged fuel filter - Change filter element
Fuel injector nozzles are faulty - Test injector nozzles and replace as required
Fuel injection pump is not working correctly - Repair or replace injection pump
Clogged air cleaner element - Replace or clean the air cleaner element
Engine stalling at idle
Low idle speed setting is not correct - Adjust as required
Fuel injection pump is broken - Repair or replace injection pump
Fuel injector nozzles are damaged or dirty - Check and change nozzles as required
Valve out of adjustment - Check and adjust
Engine overheated
Engine coolant is insufficient - Fill radiator to proper level. Check for coolant leaks
Cooling system components are damaged or system is dirty - Change faulty components or service cooling system
Engine oil level is insufficient - Checking oil level and add if necessary
Fan belt is damaged or belt tension is incorrect - Change or adjust belt tension correctly
Defective thermostat - Install new thermostat
Reduced engine power
Clogged fuel injectors - Service or change fuel injectors
Uneven fuel injection pressure - Repair or replace injection pump
Air filter is clogged - Change or replace air filter element
Oil filter element clogged - Change or clean engine oil filter element
Engine is running overloaded - Load reducing required
Excessive valve clearance - Check and adjust as required
Incorrect low idle speed adjustment - Correct the settings
Dirt in the fuel pipes or hoses - Clean fuel system hoses and pipes
Engine compression is insufficient: Worn or damaged valves - Change the valves
Abnormal engine noise or knocking
Incorrectly set fuel injection pump timing - Repair or replace fuel injection pump
Faulty fuel injector nozzles - Install new set of properly balanced nozzles
Engine oil level is low - Check and refill engine oil
Engine has not warmed up to recommended temperature - Normalize the engine temperature
Worn main bearings or crankshaft - Have bearings or crankshaft replaced
Worn or broken piston rings - Piston rings need to be replaced
Loose flywheel screws - Inspect the flywheel screws and tighten securely
Engine using too much oil
External oil leaks: Damaged gaskets or seals - To repair leaks, replace worn parts
Oil viscosity is wrong - Fill up with the proper oil viscosity
Worn or broken piston rings - Piston rings need to be replaced
Worn valve stems and valve guides - Install new valves
Cylinder liners or pistons are scuffed - Check pistons and liners, replace as required

Electrical System Troubleshooting
Battery won’t charge
Battery is worn - Battery replacement required
Battery cable harness damage - Check battery cables for damage, change or repair
Battery cables and terminals are loose or corroded - Tighten or service terminals and cables
Belt damage or incorrect belt tension adjustment - Adjust belt tension correctly or change belt
Starter cranks slow
Battery power is low - Recharge the battery
Battery will not hold charge - Battery needs service or replacement
Battery wiring harness damage - Inspect battery wiring for damage, replace or repair
Corroded or loose terminals and cables - Clean or tighten terminals and cables
Starter is not working
Low battery output - Battery is drained, charge it
Drained or defective battery - Recharge or replace battery
Starter motor is defective - Replace or repair starter
Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required

Transmission Troubleshooting
Gear hard to shift
Worn or incorrectly adjusted clutch - Adjust clutch or replace if required
Loose or broken gear shift linkage - Change or repair shift linkage
Bent or worn shift forks - Install new shift forks
Gearshift mechanism failure - Change or repair failed components
Transmission oil pressure is low
Lack of transmission fluid supply - Fill up the transmission fluid
Transmission fluid filter element is dirty (if fitted) - Clean or replace the transmission fluid filter
Relief valve is faulty - Change relief valve
Transmission noises
Bearings are worn or cracked - Faulty bearings should be replaced
Insufficient fluid supply - Check transmission fluid level and add it as required
Dirty transmission fluid - Transmission fluid must be changed
Gears are defective or backlash is incorrect - Set backlash correctly or change the gears
Shift forks are worn or damaged - Install new shift forks
External oil leaks
Gaskets or seals are damaged - Change defective gaskets or seal
Cracked transmission housing - Housing needs to be replaced

Hydraulics Troubleshooting
Hydraulic system is overheated
Hydraulic system pressure is unadjusted - Adjust the pressure as required
Unadjusted or defective main relief valve - Replace or set up the relief valve
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil
Air leaks in hydraulic system - Check the suction line, pump seals, and fittings
Low hydraulic fluid pressure
Hydraulic oil level is insufficient - Check oil level and add hydraulic oil as required
Dirty hydraulic oil filter - Clean the hydraulic filter element or replace if necessary
Faulty hydraulic oil pump - Flow-rate pump and change pump if necessary
Defective or not adjusted hydraulic spool valve - Replace or set properly
Hydraulic cylinder is broken - Check the hydraulic cylinder components for damage or wear and change if necessary
Hydraulic piping leaks - Detect leaks in the system and fix it
Hitch won't lift or lifts slowly
Not enough hydraulic oil in the system - Check oil level and add hydraulic oil as required
Cold oil in hydraulic system - Wait for oil to warm up
Hydraulic oil filter is dirty - Install a new hydraulic filter element
Damaged hydraulic oil pump - Flow-rate pump and change pump if necessary
Main relief valve malfunction or incorrect adjustment - Adjust the valve or replace if necessary
Faulty or incorrect setting hydraulic spool valve - Replace or set correctly
Faulty hydraulic cylinder - Check cylinder components for wear or damage and change if necessary
Suction line is damaged or disconnected - Connect or replace
Hitch can't drop or drops too slowly
Defective or not adjusted hydraulic spool valve - Replace or adjust correctly
Hydraulic cylinder is broken - Inspect the hydraulic cylinder components for damage or wear and change if required
Damaged lift arm shaft - Replace the shaft
Damaged mechanical components of the hitch - Replace faulty or worn hitch components
Hitch jerks when lower or lift
Air enters in hydraulic system - Inspect the pump seals, suction line, and fittings
Contaminated hydraulic oil - Change hydraulic oil
Faulty hydraulic oil pump - Check the pump performance and replace it if required
Hydraulic spool valve block is faulty or out of adjustment - Change or adjust properly
Hydraulic cylinder failure - Inspect cylinder parts for wear or damage and replace if required

Steering System Troubleshooting
Heavy steering
Damaged or improperly fitted steering column - Fit the steering column properly or change it
Air in steering system - Bleed air from system
Clogged steering filter - Steering filter need to be replaced
Incorrect toe-in adjustment - Check toe-in and correct
Incorrect tire pressure - Inflate the tires correctly
Worn steering pump - Steering pump needs to be replaced or repaired
Faulty or worn steering valve - Repair or replace the steering valve
Worn steering box parts - Change defective steering box parts
Stuck or worn relief valve - Install a new relief valve or clean it
Steering oil insufficient - Check and refill steering oil
Steering system has oil leaks - Retighten steering pipe and hose connections
Excessive free play of steering wheel
Steering column coupling or shaft has maximum wear - Change faulty part
Faulty or worn steering valve - Change or repair steering valve if required
Damaged steering gearbox parts - Change defective steering gear box components
Hydraulic steering pump is defective - Check the steering pump and replace if necessary
Steering tie-rod ends or linkage are defective - Replace failed part
Tractor is pulling to left or right
Front tires are worn out - Install new tires
Incorrect toe-in adjustment - Check toe-in and correct
Faulty or worn steering linkage or tie-rod ends - Replace damaged part
Worn steering gear box components - Repair power steering gearbox
Worn or damaged steering valve - Inspect and change as required
Incorrectly adjusted or damaged front hub bearings - Adjust correctly or replace bearings




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MF 250 MF 690 MF 3060 MF 6180
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CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294