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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
Engine is overheated
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
Poor engine power
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
Engine noise or knocking
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
High oil consumption
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
Starter turning slow
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
Starter will not work
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
Transmission noises
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




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