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Ford 4630 Tractor Troubleshooting

The Ford 4630 is a 30-series utility tractor. This model was manufactured from 1990 to 1993. The Ford 4630 tractor is powered by Ford vertical 3-cylinder water cooled diesel engine with a rated power of 60 Hp (44.7 kW) at 2200 rev/min.

The Ford 4630 is fitted with three transmission options: 8x2 Dual Range transmission, 8x8 synchronized shuttle transmission, and 16x8 Dual Power transmission. Max. forward speed - 16.5 mph (26.4 km/h), maximum reverse speed - 14.5 mph (23.2 km/h). The open center hydraulic system has a pump with a flow rate of 8.5 gpm (32.2 lpm).

The closed center hydraulic system has a pump with a flow rate of 14.1 gpm (53.4 lpm). The 2WD models are equipped with 7.50x15 front tires and 11.2x24 rear tires. The 7.50x18 front tires and 13.6x28 rear tires are used for 4WD tractors. The wheel base is 84.5 in (2140 mm) for models with 2-wheel drive and 84.1 in (2130 mm) for models with 4-wheel drive.

Compatible attachments for the Ford 4630: Ford 7209 loader with a max lift height of 110" (2790 mm), Ford 7210 loader with a max lift height of 124" (3140 mm), Ford 7310 loader with lift capacity to full height of 2685 lbs (1217 kg), Ford 7410 loader with lift capacity to full height of 2500 lbs (1134 kg).

Engine Troubleshooting
Engine won't start or difficult to start
Dirty fuel filter element - Install new filter element
Closed fuel cock - Open fuel on-off cock to inject fuel
Air trapped in fuel system - Bleed air
Dirty or damaged injectors - Check fuel injectors and replace if required
Fuel injection pump is not working correctly - Replace or repair injection pump
Poor engine compression - Check cylinder block and change worn components
Engine stalls while running
Engine has not warmed up to recommended temperature - Warm up the engine
Fuel-line is leaking air - Retighten clamps, replace defective pipes
Irregular fuel injection - Adjust fuel injection timing
Clogged fuel filter element - Replace filter element
Fuel injectors are defective or dirty - Inspect fuel injectors and replace if necessary
Engine starts and immediately stops
Timing of fuel injection pump is wrong - Fuel injection pump timing adjustment needs to be corrected
Plugged fuel filter - Change filter element
Faulty fuel injector nozzles - Install new set of properly balanced nozzles
Fuel injection pump is broken - Rebuild or change fuel pump
Clogged air cleaner - Service or change air cleaner
Engine stalls when idling
Incorrect low idle setting - Normalize low idle speed
Fuel injection pump is broken - Replace or rebuild injection pump
Fuel injector nozzles fault - Inspect injector nozzles and change if required
The valve clearance is incorrect - Adjust valve clearance
Engine overheats
Lack of coolant in cooling system - Coolant needs to be refilled. Inspect the system for leaks
Cooling system is clogged or cooling parts are defective - Flush cooling system or change faulty components
Not enough engine oil - Check oil level and add oil as required
Fan belt tension is incorrect or belt is defective - Adjust belt tension correctly or replace it
Defective thermostat - Test thermostat opening temperature, replace as required
Diesel engine is losing power
Clogged or damaged injectors - Check fuel injectors and replace if required
Incorrect fuel injection pressure - Adjust to proper pressure
Air filter is dirty - Replace filter or install new filter element
Oil filter element clogging - Clean or change engine oil filter
Engine is overloaded - Reduce engine load
Valve out of adjustment - Have it adjusted
Incorrectly set low idle speed - Need to adjust idle speed
Dirt in the hoses or pipes - Clean fuel system hoses and pipes
Insufficient engine compression: Intake or exhaust valves are damaged - Replace the valves as required
Engine noise or knocking
Incorrect setting of fuel injection pump timing - Adjust injection timing
Fuel injector nozzles are dirty - Replace fuel injector nozzles
Engine oil level is low - Add oil to the engine crankcase
Engine is cold - Warm up the engine
Main bearings or crankshaft wear - Worn parts replacement required
Broken or defective piston rings - Piston rings need to be replaced
Loose flywheel bolts - Inspect flywheel bolts and tighten properly
Diesel engine using too much oil
Oil leaks: Worn seals or gaskets - Change to repair leaks
Oil viscosity is wrong - Use oil of proper viscosity
Seized or wear piston rings - Piston rings replacement required
Worn valve guides and valve stems - Valves replacement required
Scored pistons or cylinder liners - Inspect liners and pistons, fit new parts as necessary

Electrical System Troubleshooting
Battery won’t charge
Faulty cell in battery - Replace the battery
Damaged battery cable harness - Check electrical cables for damage, repair or replace
Battery terminals and cables are loose or corroded - Service or tighten battery cables and terminals
Belt is damaged or belt tension is incorrectly adjusted - Adjust belt tension as required or change belt
Starter cranks slowly
Low battery voltage - Battery is drained, recharge it
Battery will not hold charge - Service charging system or install new battery
Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair
Corroded or loose battery terminals and cables - Clean or tighten terminals and cables
Starter motor is not working
Low battery output - Battery is drained, charge it
Drained or defective battery - Need to charge or replace the battery
Starter motor is defective - Repair or install a new starter
Battery cables are disconnected or incorrectly connected - Check cables and reconnect it correctly

Transmission Troubleshooting
Hard shifts
Failure or improper clutch adjustment - Replace or adjust clutch
Stuck or damaged gear shift linkage - Service or replace shift linkage
Worn or damaged shift forks - Replace defective shift forks
Worn gear shift mechanism - Replace worn components
Lack of transmission oil pressure
Not enough oil in transmission - Add transmission oil as required
Plugged transmission fluid filter (if equipped) - Change or clean the transmission fluid filter
Damaged relief valve - Install a new relief valve
Transmission noise
Broken or worn bearings - Bearings replacement required
Insufficient oil supply - Add transmission oil as required
Contaminated transmission oil - Transmission oil must be changed
Incorrect backlash or gears are defective - Change the gears or adjust backlash correctly
Shift forks are damaged or worn - Change the shift forks
External fluid leaks
Worn gaskets or seals - Replace worn seal or gaskets
Cracked transmission case - Install a new transmission case

Hydraulics Troubleshooting
Hydraulic system is too hot
Improper hydraulic system pressure setting - Set the pressure properly
Defective or misadjusted main relief valve - Adjust or replace the relief valve
Contaminated hydraulic oil - Change hydraulic oil
Aeration in hydraulic system - Inspect the suction line, pump seals, and fittings
Hydraulic oil pressure too low
Lack of hydraulic oil - Check oil level and add hydraulic oil as required
Hydraulic fluid filter element is dirty - Clean or change hydraulic filter
Faulty hydraulic oil pump - Test the pump flow rate and change pump if required
Defective or incorrect setting hydraulic spool valve block - Change or adjust properly
Hydraulic cylinder is not working - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Hydraulic piping leaks - Detect leaks in the system and fix it
Hitch won't lift or lifts slowly
Not enough hydraulic fluid in the system - Fill the hydraulic system with oil
Cold hydraulic fluid - Warm up the fluid
Hydraulic fluid filter is clogged - Clean or replace the hydraulic filter
Hydraulic pump not working - Test the pump flow rate and change pump if required
Main relief valve is faulty or misadjusted - Adjust or replace the relief valve
Hydraulic spool valve is not set properly or defective - Set properly or replace
Hydraulic cylinder is defective - Inspect cylinder components for wear or damage and change if required
Disconnected or damaged suction pipe - Connect or replace
3-point hitch drops slowly or won't drop
Hydraulic control valve is faulty or out of adjustment - Set properly or replace
Hydraulic cylinder is not working - Check the hydraulic cylinder components for damage or wear and change if necessary
Worn lift arm shaft - Replace the shaft
Mechanical parts of the hitch are damaged - Replace worn or faulty hitch parts
Jerky lowering or lifting of the hitch
Hydraulic system sucks air - Inspect the pump seals, suction pipe, and fittings
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil
Hydraulic pump malfunction - Check hydraulic pump flow and replace pump if necessary
Hydraulic control valve is faulty or out of adjustment - Change or set correctly
Defective hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary

Steering System Troubleshooting
Steering is stiff
Steering column is worn or improperly fitted - Refit properly or change the steering column
Air leaks in steering system - Need to bleed air
Steering filter is clogged - Replace steering filter element
Incorrect toe-in - Check toe-in and correct
Tire pressure is improper - Inflate the tires properly
Steering pump is faulty - Repair or replace steering pump
Power steering control unit is worn or defective - Inspect and change as required
Relief valve is worn or seized - Inspect relief valve and replace if necessary
Steering fluid level is insufficient - Add oil to steering system
Oil leakage in the steering system - Retighten steering line and hose connections
Steering wheel free play is excessive
Worn steering column coupling or shaft - Change defective component
Worn or damaged power steering control unit - Inspect and change as required
Steering pump malfunction - Install a new steering pump
Worn or faulty steering tie-rod ends or linkage - Change failed component
Front wheels wander to left or right
Tires are deflated - Need to inflate tires
Incorrect toe-in adjustment - Adjust toe-in properly
Worn or faulty steering linkage or tie-rod ends - Change damaged component
Defective or worn power steering control unit - Change or repair steering unit if required
Defective steering cylinder - Repair or change steering cylinder
Front hub bearings are improperly adjusted or defective - 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