Technical Details and Capabilities of the John Deere 4995 Self-Propelled Windrower

Choose the 4995 model with a 4.5L 4-cylinder diesel engine if you need consistent power output around 115 horsepower. This configuration supports steady performance during long cutting sessions without thermal overload or drop in RPM under load. For operators working in hilly terrain, the optional four-wheel drive adds traction and improves steering control during sharp turns and inclines.

Use a 16-foot rotary head if you’re handling thick or damp forage. This size balances ground coverage with maneuverability, especially on irregular field layouts. Adjust the platform tilt and float pressure for optimal stubble height and minimal scalping on uneven ground. Keep the conditioning rolls properly tensioned for consistent crimping of the crop, especially in high-moisture alfalfa.

Expect a transport speed up to 18 mph, which shortens relocation time between fields. Maintain tire pressure at factory specifications to preserve ride stability during these transitions. Hydraulic deck lift and onboard diagnostics minimize downtime during head swaps and mechanical checks. Always monitor coolant temperature and hydraulic fluid levels after each full day of operation to prevent avoidable component stress.

Detailed Technical Breakdown for the 4995 John Deere Windrower

Select the 4995 model with the 4.5L four-cylinder PowerTech diesel engine if you prioritize fuel efficiency and consistent torque delivery under load. Rated at 125 horsepower, this engine supports high-capacity cutting with low vibration, especially when paired with rotary platforms.

The hydrostatic transmission includes a dual-range setup, offering precise speed control from 0 to 18 mph (0 to 29 km/h) for transport and 0 to 12 mph (0 to 19.3 km/h) during field operations. It integrates with the CommandTouch system, allowing seamless directional changes without clutch input.

For improved traction and hillside stability, consider equipping the unit with the optional four-wheel drive. The rear axle system uses a hydraulic motor to engage additional power during slippage or heavy cutting conditions, especially effective in damp terrain.

Hydraulic pump capacity reaches 45 GPM (170 L/min), supporting high-speed header lifts and real-time adjustment of reel and auger positioning. Platform compatibility includes rotary and sickle heads, with automatic platform recognition and preset header height return functions.

Operator comfort features include a suspended seat, tilt and telescoping steering column, and a right-hand control console with backlit switches. The factory-installed air conditioning and heater unit runs off an independent 12V electrical circuit with a 90-amp alternator, maintaining stable cabin climate regardless of external temperature swings.

The frame uses a welded, heavy-gauge steel structure with reinforced gussets at all articulation points. The wheelbase measures 119 inches (302 cm), ensuring tight turning and balanced weight distribution, even under heavy load.

Powertrain Configuration and Engine Performance Parameters

Select the 4995 model with the 6.8L John Deere PowerTech engine rated at 2750 rpm for optimal balance between cutting power and fuel efficiency. The inline six-cylinder diesel delivers 116 net horsepower, making it suitable for consistent performance under heavy crop load.

The hydrostatic drive system uses a four-range, infinitely variable speed transmission, offering precise control from 0 to 23 mph. For field use, operate within ranges A or B to maintain torque under varying terrain loads. Transport requires range D, which maximizes ground speed without compromising engine stability.

Pair the engine with high-capacity radiator and rotary screen to prevent thermal overload during extended cutting sessions. For long hauls or hilly regions, consider the optional rear wheel assist to maintain traction without excessive throttle input.

Maintain engine performance by checking fuel filter restriction indicators regularly and servicing air filters when restriction exceeds 50%. Use low-sulfur diesel and adhere to 250-hour oil change intervals to preserve power output and reduce injector wear.

Hydraulic System Capabilities and Control Features

Adjust the header float pressure to match varying crop and terrain conditions using the in-cab controls. The 4995’s dual-circuit hydraulic system separates steering and header operations, preventing load interference during simultaneous actions.

Use the following pressure ranges for optimal performance:

• Header lift pressure: 1800–2100 psi
• Reel drive pressure: 1000–1300 psi
• Steering system pressure: 900–1100 psi

Switch between float, lift, and tilt modes using the fingertip-mounted multi-function joystick. The return-to-cut feature restores the header to the last set height after each lift, minimizing downtime during turns. Fine-tune floatation with precision using the dedicated knob on the right console.

For consistent cutting height across uneven ground, monitor and adjust the tilt cylinder with feedback from the integrated position sensors. The system maintains header stability even under asymmetric load conditions thanks to independent left-right hydraulic balancing.

Check for contamination or cavitation by monitoring the sight glass on the reservoir and the in-line filter indicator. Replace the hydraulic oil every 500 hours using low-viscosity, high-zinc formulations to maintain consistent actuator response times.

Cutting Platform Compatibility and Header Drive Specifications

Use the 4995 model with matched headers from the 600 and 900 series to maintain full hydraulic control and optimized header float. The platform width should not exceed 16 feet for auger headers and 18 feet for draper headers to ensure consistent cut quality and ground following on uneven terrain.

The header drive system features a dual hydraulic motor configuration delivering up to 110 horsepower to the platform. Operators can adjust header speed through the in-cab console, allowing fine-tuned control based on crop density and moisture conditions. For example, rotary headers require higher drive torque and benefit from the 4995’s variable-speed control with feedback sensors.

Match quick-attach couplers and PTO shaft length precisely to prevent mechanical play and hydraulic inefficiencies. Always align the splines with the primary drive shaft and verify locking engagement to avoid excessive vibration during operation.

Recommended flow rate for header hydraulic motors ranges between 23 and 25 gallons per minute, which the integrated pump system supports consistently under full load. Maintain operating pressure within the 2500–2800 psi range to ensure stable cutterbar drive and reel synchronization.

When using conditioning headers, adjust the roll gap and tension according to crop type and field speed. The machine’s onboard diagnostics assist in detecting header imbalance and alert the operator before mechanical strain occurs. For highest output and minimal maintenance, pair the 4995 with headers specifically calibrated for its drive and hydraulic output parameters.