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John Deere 2950 Troubleshooting
The
John Deere 2950 is a two-wheel drive or four-wheel drive utility tractor from
2050 series. This model was manufactured between 1983 and 1988. The John Deere
2950 tractor is powered by 359 cu.in (5.9L) John Deere 6359DL 4-cycle 6-cylinder
direct injection liquid cooled naturally aspirated diesel engine with a rated
power of 94 hp (69.6 kW) at 2500 rev/min.
The John Deere 2950 is fitted with 2 types of transmission. 1st type:
16x8 top shaft synchronized (TSS) partial power shift transmission. 2nd
type: Top shaft synchronized (TSS) creeper transmission with 12 forward
and 8 reverse gears. Max forward speed - 17.4 mph (27.9 kph), max
reverse speed - 7.8 mph (12.5 kph). The closed center hydraulic system
used a piston pump with fluid flow rate of 23 gpm (87.2 lpm). The
2-wheel drive models are equipped with 10.0x16 front tires and 18.4x34
rear tires. The 13.6x24 front tires and 18.4x34 rear tires are used for
tractors with 4-wheel drive.
The wheelbase is 100.4" (2550 mm) for 4x2 (2WD) models and 101.6" (2580
mm) for 4x4 (4WD) models. The tractor is compatible with a
John Deere
148 front-end loader with lift capacity to full height of 3100 lbs (1405
kg), John Deere 260 front-end loader with lift capacity to full height
of 3186 lbs (1445 kg), or John Deere 265 front-end loader with lift
capacity to full height of 3920 lbs (1778 kg).
| Engine Troubleshooting |
| Engine won't start or hard to start |
| Fuel filter is dirty - Replace the filter element |
| Fuel supply valve is closed - Open fuel supply valve |
| Fuel-line is leaking air - Retighten clamps, replace defective pipes |
| Clogged fuel injectors - Change fuel injectors |
| Fuel injection pump malfunctioning - Replace injection pump or repair it |
| Engine has bad compression - Check cylinder block and replace damaged components |
| Engine stops running while driving |
| Engine is cold - Engine is not warmed up to the required temperature |
| Air in fuel system - Air-bleed fuel system |
| Irregular fuel injection - Adjust fuel injection timing |
| Plugged fuel filter - Change filter element |
| Clogged fuel injectors - Inspect fuel injectors and replace if necessary |
| Diesel starts but then stalls |
| Timing of fuel injection pump is wrong - Adjust the fuel injection pump timing correctly |
| Plugged fuel filter - Service or replace the filter |
| Fuel injector nozzles are dirty or defective - Service or replace nozzles if required |
| Fuel injection pump is broken - Change or repair the pump |
| Air cleaner element clogging - Clean or replace the air cleaner element |
| Engine stalls when idling |
| Improperly adjusted low idle speed - Correct the settings |
| Fuel injection pump malfunctioning - Change or repair the pump |
| Fuel injector nozzles are faulty - Change injector nozzles |
| The valve clearance is not adjusted - Adjustment procedure required |
| 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 - Service the cooling system or replace faulty components |
| Engine oil insufficient - Fill up the engine oil |
| Fan belt tension is not adjusted or belt is broken - Adjust belt tension properly or change it |
| Thermostat failure - Check thermostat, replace if necessary |
| Clogged fuel injectors - Clean or replace fuel injectors |
| Insufficient fuel injection pressure - Adjust pressure to proper level |
| Clogged air filter element - Replace or service air filter element |
| Dirty oil filter - Clean or replace engine oil filter element |
| Engine is under excessive load - Reduce the load or operate the tractor in lower gears |
| Valve clearance is out of adjustment - Check and adjust |
| Low idle speed set incorrectly - Normalize low idle speed |
| Dirty fuel pipes or hoses - Service fuel pipes and hoses |
| Engine compression is insufficient: Valves are faulty or leaking - Valves need to be replaced |
| Unadjusted fuel injection pump timing - Fuel injection pump timing adjustment needs to be corrected |
| Clogged or defective injector nozzles - Service or replace nozzles if required |
| Engine oil level low - Check and refill engine oil |
| Coolant temperature is low - Warm up engine to required temperature |
| Worn main bearings or crankshaft - Change or repair worn components |
| Defective or broken piston rings - Piston rings replacement required |
| Flywheel bolts are loose - Bolts need to be tightened |
| External oil leaks: Damaged gaskets or seals - Replace defective parts |
| Improper oil viscosity - Use correct viscosity oil |
| Damaged or seized piston rings - Replace piston rings |
| Worn valve stems and valve guides - Replace defective valves |
| Scored cylinder liners or pistons - Check liners and pistons, change as required |
| Electrical System Troubleshooting |
| Battery won’t charge |
| Faulty cell in battery - Battery replacement required |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Corroded or loose cables and terminals - Tighten or service terminals and cables |
| Belt is defective or belt tension is improperly adjusted Replace belt or correctly adjust belt tension |
| Low battery capacity - Charge the battery |
| Battery does 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 cables and terminals - Tighten or clean terminals and cables |
| Battery power is low - Recharge the battery |
| Drained or faulty battery - Charge or replace the battery |
| Damaged starter motor - Repair or change starter |
| Disconnected or incorrectly connected cables - Inspect battery cables and connect correctly |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Worn or incorrectly adjusted clutch - Adjust or change the clutch |
| Loose or broken gear shift linkage - Change defective shift linkage |
| Bent or worn shift forks - Install new shift forks |
| Defective gearshift mechanism - Replace defective components |
| Low transmission fluid pressure |
| Oil level is insufficient - Add transmission oil as required |
| Transmission fluid filter is dirty (if equipped) - Change or clean the transmission fluid filter |
| Faulty relief valve - Replace the valve |
| Damaged or worn bearings - Change faulty bearings |
| Low transmission oil level - Fill the transmission housing to proper oil level |
| Dirty transmission oil - Change transmission oil |
| Worn gears or improper backlash - Replace gears or adjust backlash properly |
| Damaged or worn shift forks - Change defective shift forks |
| Transmission fluid leaking |
| Seals or gaskets are damaged - Change defective seal or gaskets |
| Transmission case is cracked - Replace case or transmission assembly |
| Hydraulics Troubleshooting |
| Excessive hydraulic system heat |
| Hydraulic system pressure is not adjusted correctly - Correct adjustment is required |
| Main relief valve is damaged or adjusted improperly - Adjust the valve or replace if necessary |
| Dirty hydraulic fluid - The fluid must be changed |
| Hydraulic system sucks air - Check the pump seals, suction pipe, and fittings |
| Hydraulic fluid pressure is insufficient |
| Hydraulic oil level is low - Fill up the hydraulic oil |
| Hydraulic oil filter element is dirty - Hydraulic filter maintenance required |
| Hydraulic pump not working - Check pump flow and install new pump if necessary |
| Hydraulic spool valve is defective or set improper - Adjust correctly or change |
| Hydraulic cylinder is faulty - Check cylinder components for wear or damage and change if necessary |
| Leakage in hydraulic pipes - Detect leaks in hydraulic system and repair it |
| Three-point hitch lifting is too slow or cannot be lifted |
| Hydraulic oil level is low - Check oil level and add hydraulic oil as required |
| Cold hydraulic oil - Warm up the oil |
| Hydraulic oil filter element is dirty - Change the hydraulic filter element or service if required |
| Damaged hydraulic oil pump - Flow-rate hydraulic pump and replace pump if necessary |
| Unadjusted or defective main relief valve - Adjust or change relief valve |
| Hydraulic control valve is defective or set improper - Adjust properly or change |
| Broken hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Suction pipe is damaged or loose - Repair or change |
| Hitch does not lower or lowers very slowly |
| Damaged or incorrect adjusted hydraulic spool valve - Change or adjust correctly |
| Hydraulic cylinder is not working - Check cylinder components for wear or damage and change if necessary |
| Worn hitch cross shaft - Change the shaft |
| The hitch is defective if there is internal mechanical damage - Replace worn or defective hitch parts |
| Hitch raises or lowers not smoothly |
| Air in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic oil is dirty - Hydraulic oil change required |
| Damaged hydraulic oil pump - Test pump performance and replace pump if necessary |
| Hydraulic control valve block is defective or set improper - Adjust properly or replace |
| Hydraulic cylinder is defective - Check the hydraulic cylinder components for damage or wear and change if necessary |
| Steering System Troubleshooting |
| Difficult steering |
| Steering column is worn or incorrectly assembled - Steering column must be assembled correctly or changed |
| Air leaks in steering system - Need to bleed air |
| Dirty steering filter element - Clean or replace the element |
| Incorrect toe-in - Check and adjust toe-in |
| Tires are not properly inflated - Inflate tires as required |
| Steering pump is faulty - Install a new hydraulic steering pump |
| Faulty or worn hydrostatic steering unit - Replace or repair steering unit as required |
| Relief valve is stuck or worn - Replace or service relief valve |
| Steering fluid level low - Checking steering fluid level and add it if necessary |
| Oil leaks in the steering system - Tighten the steering line and hose joints |
| Steering wheel free play is excessive |
| Worn steering column shaft or coupling - Replace faulty part |
| Damaged or worn hydrostatic steering unit - Inspect and change as required |
| Hydraulic steering pump is defective - Replace or repair steering pump |
| Faulty or worn steering linkage or tie-rod ends - Replace failed component |
| Front wheels wander to left or right |
| Tires are deflated - Need to inflate tires |
| Improper toe-in adjustment - Adjust toe-in properly |
| Steering tie-rod ends or linkage are worn - Replace damaged part |
| Worn or damaged hydrostatic steering unit - Repair or change the steering unit |
| Faulty steering cylinder - Repair or change hydraulic steering cylinder |
| Front hub bearings are damaged or incorrectly adjusted - Adjust correctly or install new bearings |
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| Farm Tractors Technical Specifications |
