John Deere Product Details
844 P-Tier
Move Material With High-Capacity Performance
With ~417 horsepower and up to 8.0 cu. yd. bucket capacity, the 844 P‑Tier is built to handle large volumes in quarry, aggregate, and heavy material handling operations.
Maximize Loading Efficiency and Hit Target Loads
Optional SmartWeigh™ technology helps operators accurately measure payloads in real time—improving load consistency, reducing rework, and increasing tons moved per shift.
Built to Perform in Tough Environments
Heavy-duty axles, reinforced drivetrain components, and advanced cooling systems are designed to withstand harsh jobsite conditions and keep machines productive with minimal downtime.
Description: 844 P-Tier
Key Specs
| Net Peak Power | 1400 rpm |
| Net Peak Power At Rated RPM (ISO 9249) | 417 hp |
| Net Peak Torque | 1400 rpm |
| Net Peak Torque At Rated RPM (ISO 9249) | 1563 lb-ft |
Engine
| Manufacturer | John Deere |
| Model | John Deere JD14 |
| Non-Road Emission Standards | EPA Final Tier 4/EU Stage V |
| Cylinders | 6 |
| Valves Per Cylinder | 4 |
| Displacement | 824 cu in. |
| Net Peak Power | 1400 rpm |
| Net Peak Power At Rated RPM (ISO 9249) | 417 hp |
| Net Peak Torque | 1400 rpm |
| Net Peak Torque At Rated RPM (ISO 9249) | 1563 lb-ft |
| Net Torque Rise | 44 % |
| Fuel System (Electronically Controlled) | Electronic High Pressure Common Rail (HPCR) |
| Lubrication | Full-flow spin-on filter and integral cooler |
| Aspiration | Series turbocharged, charge air cooled |
| Air Cleaner | Dual-element dry type, restriction indicator in cab monitor for service; additional centrifugal engine pre-cleaner |
Cooling
| Fan Drive Type | Hydraulically driven, proportionally controlled, fan aft of coolers; automatic reversing fan drive |
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 |
Transmission System
| Type | Countershaft-type PowerShiftâ„¢ with lockup torque converter |
| Torque Converter | Single stage, dual phase with freewheeling stator with lockup clutch |
| 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 | Manual/auto (1st–5th or 2nd–5th); Quick-Shift button with 2 selectable modes: kick-down or kick-up/down; and 4 settings for clutch cutoff |
Maximum Forward Travel Speeds (Standard 5-Speed With Lockup Torque Converter)
| Tire Size Used To Measure Travel Speeds | 875/65R29 L3 |
| Range 1 | 4 mph |
| Range 2 | 7.1 mph |
| Range 3 | 10.8 mph |
| Range 4 | 15.4 mph |
| Range 5 | 24.9 mph |
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 |
| Optional Differentials Front | Dual locking |
| Optional Differentials Rear | Dual locking |
| Tire Size Used To Measure Oscillation | 29.5 R 25, 1 |
| Rear Axle Oscillation, Distance Each Direction | 8 degrees |
| Service Brakes (ISO 3450) | Outboard, forced oil cooled, multi disc |
| Parking Brake (ISO 3450) | Automatic spring applied, hydraulically released, sealed wet multi disc |
Wheels And Tires
| Tire Size Used To Measure | Michelin 875/65R29, 1 Star L-3 |
| Tread Width On Standard Tires | 96.1 in. |
| Width Over Tires On Standard Tires | 134.2 in. |
Serviceability
| Fuel Tank (With Lockable Cap) Refill Capacity | 141 gal. |
| Cooling System Refill Capacity | 60.5 qt |
| Diesel-Exhaust Fluid (DEF) Refill Capacity | 27.8 qt |
| Engine Oil With Vertical Spin-On Filter Refill Capacity | 42.3 qt |
| Transmission Reservoir With Vertical Filter Refill Capacity | 7.4 gal. |
| Axle Oil Without Coolers (Front And Rear, Each) Refill Capacity | 18 gal. |
| Hydraulic Reservoir With Filter Refill Capacity | 48 gal. |
| Parking Brake Oil (Wet Disc) Refill Capacity | 24 oz. |
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 | 1000 psi |
| Pump (Steering) | 1 variable-displacement, load-sensing axial-piston pumps; closed-center system |
| Max Rated Flow At Rated RPM | 52.7 gpm |
| 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) | 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 |
