| Manufacturer | John Deere |
| Price | - |
| Model | 4955 |
| Equipment Type | Row-Crop Tractors |
| Factory | Waterloo, Iowa, USA |
OCED TRACTOR TEST 1622 2
| Description | Diesel PowerShift 4WD April 1 - June 1, 1989 Link: OCED Tractor Test 1622 file PTO performance Drawbar performance Gear 12 used for power test Gear 3 used for pull test |
| Max power | 176.48hp / 131.6kW |
| Fuel use | 11.1gal/hour / 42.0l/hour |
| Power at rated engine speed | 202.73hp / 151.2kW |
| Max pull | 23,715lbs / 10757kg |
JOHN DEERE 4955 POWER
| Engine (net) | 225.3hp / 168.0kW |
| PTO (claimed) | 200hp / 149.1kW |
| Drawbar (tested) | 176.48hp / 131.6kW |
| PTO (tested) | 210.00hp / 156.6kW |
ENGINE DETAIL
The John Deere 4955 features a robust 7.6L turbocharged diesel engine, ideal for high-torque applications due to its 16:1 compression ratio and a rated RPM of 2200, providing efficient power delivery. With a firing order of 1-5-3-6-2-4, it ensures balanced operation, minimizing vibrations. However, maintaining proper valve clearances (0.015 inches intake and 0.020 inches exhaust) is crucial for optimal performance and longevity, necessitating routine inspections.
| Description | John Deere turbocharged diesel 6-cylinder liquid-cooled inline |
| Displacement | 466ci / 7.6L |
| Bore/Stroke | 4.5625x4.75inches / 116x 121mm |
| Air cleaner | dry |
| Compression | 16:1 |
| Rated RPM | 2200 |
| Firing order | 1-5-3-6-2-4 |
| Starter volts | 12 |
| Oil capacity | 22qts / 20.8L |
| Coolant capacity | 32qts / 30.3L |
| Intake valve clearance | 0.015inches / 0.381mm |
| Exhaust valve clearance | 0.020inches / 0.508mm |
JOHN DEERE 4955 ENGINE
The John Deere 4955 is equipped with a robust 7.6L 6-cylinder diesel engine, offering substantial torque for heavy-duty agricultural tasks. Its advanced hydraulic system facilitates efficient power delivery to implements, enhancing overall operational effectiveness. However, its size and weight can pose challenges in maneuverability on smaller plots, necessitating careful planning in field operations.
| Description | John Deere 7.6L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 4955 features a 15-speed full power shift transmission, allowing for smooth and efficient power delivery under load, advantageous for heavy-duty agricultural tasks. The optional 16-speed partial power shift enhances versatility by providing additional gear increments for varying field conditions, optimizing engine performance and fuel efficiency. However, operators may face a learning curve with complex transmission controls, necessitating proper training for maximum benefit.
| Description | 15-speed full power shift 16-speed partial power shift |
TRANSMISSION 1
The John Deere 4955's full power shift transmission offers a total of 15 forward and 4 reverse gears, providing excellent versatility for various field operations. The hydraulic wet disc clutch ensures smooth engagement and durability, minimizing wear during high-torque applications. However, maintenance of the hydraulic system can be critical, as it directly affects the transmission performance and operational efficiency in demanding environments.
| Transmission | John Deere Power Shift |
| Type | full power shift |
| Gears | 15 forward and 4 reverse |
| Clutch | hydraulic wet disc |
TRANSMISSION 2
The John Deere 4955 features a Quad-Range transmission with 16 forward and 6 reverse gears, providing versatility in varying field conditions. The partial power shift allows for smoother gear transitions under load, enhancing productivity during tasks such as plowing or tilling. A potential challenge includes the learning curve for operators new to power shift systems, but overall, this transmission is advantageous for maximizing both speed and torque across diverse agricultural applications.
| Transmission | John Deere Quad-Range |
| Type | partial power shift |
| Gears | 16 forward and 6 reverse |
MECHANICAL
The John Deere 4955 offers versatile drivetrain options with 2WD, MFWD, and 4WD, allowing for enhanced traction in diverse field conditions. Its inboard planetary final drives provide durability and reduced maintenance needs, while the power steering enhances maneuverability, especially in tight spaces. The hydraulic wet disc brakes ensure reliable stopping power under heavy loads, making this tractor suitable for demanding agricultural tasks; however, the complexity of a 15- or 16-speed transmission might require more operator training to utilize effectively.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Final drives | inboard planetary |
| Steering | power |
| Brakes | differential hydraulic wet disc |
| Cab | Sound Gard cab standard |
| Transmissions | 15-speed full power shift 16-speed partial power shift |
CAPACITY
| Fuel | 102gal / 386.1L |
| PowerShift Hydraulic system | 18.5gal / 70.0L |
| PS MFWD Hydraulic system | 20gal / 75.7L |
| QuadRange Hydraulic system | 26.9gal / 101.8L |
HYDRAULICS
| Type | closed center |
| PowerShift Capacity | 18.5gal / 70.0L |
| PS MFWD Capacity | 20gal / 75.7L |
| QuadRange Capacity | 26.9gal / 101.8L |
| Pressure | 2530psi / 174.4bar |
| Valves | 2 or 3 |
| Pump flow | 29.5gpm / 111.7lpm |
| SCV flow | 20.6gpm / 78.0lpm |
TRACTOR HITCH
| Rear Type | III |
| Rear lift | 7486lbs / 3395kg *Advertised as 9710 pounds, the tractor was only able to lift 5504 during testing./8274lbs / 3753kg *With optional assist cylinder. Advertised as 10560 pounds, but actual tested lift was 7281 pounds |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | hydraulic |
| Rear RPM | 1000 (1.75) |
DIMENSIONS
| 2WD Wheelbase | 118.5inches / 300cm |
| 4WD Wheelbase | 117.1inches / 297cm |
| Width | 118inches / 299cm *Minimum width with standard axle |
| Height (cab) | 118.8inches / 301cm |
| Operating weight | 18,370lbs / 8332kg (20.8R42 duals) |
| Ballasted weight | 24,665lbs / 11188kg |
| Rear axle | Rack-and-pinion: 3.94 by 108inches / 100by 2743mm |
DIMENSIONS & TIRES
The John Deere 4955 tractor features a robust weight of 18,370 lbs, which enhances traction and stability, particularly in challenging field conditions. The 2WD wheelbase of 118.5 inches provides better maneuverability, while the slightly shorter 4WD wheelbase of 117.1 inches can offer improved power distribution for enhanced traction on uneven terrain. However, the 4WD configuration may introduce additional weight and maintenance considerations, impacting overall operating costs.
| 2WD Wheelbase | 118.5inches / 300cm |
| 4WD Wheelbase | 117.1inches / 297cm |
| Weight | 18,370lbs / 8332kg |
JOHN DEERE 280 LOADER
| Loader weight | 2795lbs / 1267kg |
| Height (to pin) | 178inches / 452cm |
| Clearance, dumped bucket | 152inches / 386cm |
| Dump reach | 26inches / 66cm |
| Clearance, level bucket | 173inches / 439cm |
| Rollback angle | 41° |
| Breakout force (lift) | 6220lbs / 2821kg |
| Lift to full height (at pin) | 4580lbs / 2077kg |
| Bucket width | 85inches / 215cm 97inches / 246cm |
JOHN DEERE 840 LOADER
| Clearance, dumped bucket | 149inches / 378cm |
| Dump angle | 60° |
| Rollback angle | 40° |
| Bucket width | 96.5inches / 245cm |
4955 SERIAL NUMBERS
| Location | Serial number plate on the rear of the 4955, above the PTO shaft |
| 1989 | 1001 |
| 1990 | 3501 |
| 1991 | 7001 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 120 |
| Batteries | 2 |
| Battery CCA | 925 |
| Battery volts | 12 |