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Features
Unlock Instant Power and Smarter Control with E‑Drive
Deere’s Electric Variable Transmission (EVT) delivers instant power response and simplified single‑pedal operation, improving controllability while reducing operator input in demanding loading applications.
Move More Material with Greater Efficiency
With ~422 horsepower and up to 8.5 cu. yd. bucket capacity, the 844 X‑Tier improves bucket fill and cycle efficiency—helping increase tons moved per hour in aggregate and quarry operations.
Reduce Operating Costs in High-Production Work
The E‑Drive system and optimized operating modes help reduce fuel consumption and improve overall efficiency, lowering total cost of ownership while maintaining strong production performance.
Specifications
Engine
| Manufacturer | John Deere |
| Model | JD14 |
| Non-Road Emission Standards | EPA Tier 4/EU Stage V |
| Cylinders | 6 |
| Valves Per Cylinder | 4 |
| Displacement | 13.55 L |
| Displacement | 827 cu in. |
| Net Peak Power | 1400 rpm |
| Net Peak Power At Rated RPM (ISO 9249) | 315 kW |
| Net Peak Power At Rated RPM (ISO 9249) | 422 hp |
| Net Peak Torque | 1400 rpm |
| Net Peak Torque At Rated RPM (ISO 9249) | 2151 Nm |
| Net Peak Torque At Rated RPM (ISO 9249) | 1586 lb-ft |
| Net Torque Rise | 53 % |
| Fuel System (Electronically Controlled) | Electronic High Pressure Common Rail (HPCR) |
| Lubrication | Full-flow spin-on filter and integral cooler |
| Aspiration | Single turbocharged, charge air cooled |
| Air Cleaner | Dual-element dry type, restriction indicator in cab monitor for service; additional centrifugal engine pre-cleaner |
Transmission System
| Type | Electric Variable Transmission (EVT) |
| Shift Control | Electronically modulated, adaptive, load and speed dependent |
| Operator Interface | Steering-column or joystick-mounted F-N-R and gear-select lever; quick-shift button on hydraulic lever |
| Shift Modes | Auto (1st–4th or 2nd–4th); quick-shift button with 2 selectable modes: kick-down or kick-up/down |
Serviceability
| Fuel Tank (With Lockable Cap) Refill Capacity | 534 L |
| Fuel Tank (With Lockable Cap) Refill Capacity | 141 gal. |
| Cooling System Refill Capacity | 60.5 L |
| Cooling System Refill Capacity | 64 qt |
| Diesel-Exhaust Fluid (DEF) Refill Capacity | 26.3 L |
| Diesel-Exhaust Fluid (DEF) Refill Capacity | 27.6 qt |
| Engine Oil With Vertical Spin-On Filter Refill Capacity | 61 L |
| Engine Oil With Vertical Spin-On Filter Refill Capacity | 64.4 qt |
| Transmission Reservoir With Vertical Filter Refill Capacity | 53 L |
| Transmission Reservoir With Vertical Filter Refill Capacity | 14 gal. |
| Axle Oil Without Coolers (Front And Rear, Each) Refill Capacity | 68 L |
| Axle Oil Without Coolers (Front And Rear, Each) Refill Capacity | 18 gal. |
| Hydraulic Reservoir With Filter Refill Capacity | 196 L |
| Hydraulic Reservoir With Filter Refill Capacity | 51.7 gal. |
| Parking Brake Oil (Wet Disc) Refill Capacity | 0.35 L |
| Parking Brake Oil (Wet Disc) Refill Capacity | 11.84 oz. |
Wheels And Tires
| Tire Size Used To Measure | 875/65R29, 1 Star L-3 |
| Tread Width On Standard Tires | 2440 mm |
| Tread Width On Standard Tires | 96.1 in. |
| Width Over Tires On Standard Tires | 3408 mm |
| Width Over Tires On Standard Tires | 134.2 in. |
Axles And Brakes
| Final Drives | Heavy-duty mid-board planetary |
| Standard Differentials Front | Conventional differential front and rear – standard; hydraulic locking front with conventional rear – optional; dual locking front and rear – optional |
| Standard Differentials Rear | Conventional differential front and rear – standard; hydraulic locking front with conventional rear – optional; dual locking front and rear – optional |
| Tire Size Used To Measure Oscillation | 29.5 R 25, 1 Star L3 tires |
| Rear Axle Oscillation, Stop To Stop | 26 degrees |
| Rear Axle Oscillation, Distance Each Direction | 13 degrees |
| Service Brakes (ISO 3450) | Outboard, forced oil cooled, multi disc |
| Parking Brake (ISO 3450) | Automatic spring applied, hydraulically released, sealed wet multi disc |
Electrical And Lighting
| System Type | 24 volt with 150-amp alternator |
| Battery Voltage | 12 V |
| Number Of Batteries | 2 |
| Battery Capacity Per Each | 1400 CCA |
| Standard Alternator Rating | 150 amp |
Hydraulic System And Steering
| Pump Type And System (Loader And Steering) | 2 variable-displacement, load-sensing axial-piston pumps; closed-center system |
| Rated RPM | 2000 rpm |
| System Pressure At Max Rated Flow | 6894.76 kPa |
| System Pressure At Max Rated Flow | 1000 psi |
| Pump (Steering) | 1 variable-displacement, load-sensing axial-piston pumps; closed-center system |
| Max Rated Flow At Rated RPM | 199.5 L/min |
| Max Rated Flow At Rated RPM | 52.7 gpm |
| System Relief Pressure (Loader And Steering) | 24900 kPa |
| System Relief Pressure (Loader And Steering) | 3611 psi |
| Loader Controls | 2-function valve; single- or dual-lever controls; control lever lockout feature; optional 3rd function valve with auxiliary levers |
| Steering Type (ISO 5010) | Power, fully hydraulic; single-lever control and adjustable wristrest with conventional steering wheel override |
| Steering Articulation Full Arc Angle | 80 degrees |
| Steering Articulation Angle Each Direction | 40 degrees |
| Turning Radius (Measured To Centerline Of Outside Tire) | 6.3 m |
| Turning Radius (Measured To Centerline Of Outside Tire) | 20.67 ft, in. |
| Hydraulic Raise Cycle Time | 5.9 seconds |
| Hydraulic Dump Cycle Time | 1.9 seconds |
| Hydraulic Lower (Power Down) Cycle Time | 3.6 seconds |
| Hydraulic Total Cycle Time | 11.4 seconds |
Cooling
| Fan Drive Type | Hydraulically driven, proportionally controlled, fan aft of coolers, automatic reversing fan drive |