John Deere 644 G-Tier Wheel Loader Specs

Category: Wheel Loaders ➔
Manufacturer: John Deere ➔
Model: 644 G-Tier ➔

General Specifications

John Deere 644 G-Tier Wheel Loader General Specifications specifications
Bucket Capacity	4.0–4.25 - Starting 2025
Engine Power	227 (169) - Starting 2024
Engine Power Net	227.00 hp (169.28 kw) - Starting 2025
Engine type	Deere PowerTech PVS 6068H - Starting 2024
Max Dump Height	9.80 ft (2.99 m) - Starting 2025
Operating Weight	39,537–41,209 - Starting 2025
OperatingWeight	39,537–41,209 - Starting 2026

Axles And Brakes

John Deere 644 G-Tier Wheel Loader Axles And Brakes specifications
Final Drives	Heavy-duty inboard-mounted planetary - Starting 2026
Optional Differentials Front	Open differential, locking front optional - Starting 2026
Optional Differentials Rear	Open differential, locking front optional - Starting 2026
Parking Brake (ISO 3450)	Automatic spring applied, hydraulically released, driveline mounted, oil cooled, multi disc - Starting 2026
Rear Axle Oscillation, Distance Each Direction	13.0 degrees - Starting 2026
Rear Axle Oscillation, Stop To Stop	26.0 degrees - Starting 2026
Service Brakes (ISO 3450)	Hydraulically actuated, spring retracted, self-adjusting, inboard sun-shaft mounted, oil cooled, single disc - Starting 2026

Cooling

John Deere 644 G-Tier Wheel Loader Cooling specifications
Fan Drive Type	Hydraulically driven, proportionally controlled, fan aft of coolers - Starting 2026

Electrical And Lighting

John Deere 644 G-Tier Wheel Loader Electrical And Lighting specifications
Battery Capacity Per Each	950.0 CCA - Starting 2026
Battery Voltage	12.0 v - Starting 2026
Standard Alternator Rating	80.0 amp - Starting 2026
System Type	24 volt with 80-amp alternator - Starting 2026

Engine

John Deere 644 G-Tier Wheel Loader Engine specifications
Air Cleaner	Under-hood, dual-element dry type, restriction indicator in cab monitor for service - Starting 2026
Aspiration	Turbocharged, charge air cooled - Starting 2026
Displacement	414.00 cu in (6,784.26 cu cm) - Starting 2026
Fuel System (Electronically Controlled)	High-pressure common rail - Starting 2026
Lubrication	Full-flow spin-on filter and integral cooler - Starting 2026
Manufacturer	John Deere - Starting 2026
Net Peak Power	1700.0 rpm - Starting 2026
Net Peak Power At Rated RPM (ISO 9249)	235.00 hp (175.24 kw) - Starting 2026
Net Peak Torque	1400.0 rpm - Starting 2026
Net Peak Torque At Rated RPM (ISO 9249)	755.00 lbs ft (1,023.63 nm) - Starting 2026
Non-Road Emission Standards	EPA Final Tier 4/EU Stage V - Starting 2026

Hydraulic System And Steering

John Deere 644 G-Tier Wheel Loader Hydraulic System And Steering specifications
Hydraulic Dump Cycle Time	1.5 s - Starting 2026
Hydraulic Lower (Power Down) Cycle Time	3.2 s - Starting 2026
Hydraulic Raise Cycle Time	5.2 s - Starting 2026
Hydraulic Total Cycle Time	9.9 s - Starting 2026
Loader Controls	2-function valve; joystick control or fingertip controls (field kit); hydraulic-function enable/disable; optional 3rd-function valve with auxiliary lever - Starting 2026
Max Rated Flow At Rated RPM	87.00 gpm (329.30 lpm) - Starting 2026
Pump Type And System (Loader And Steering)	Variable-displacement, axial-piston pump; closed-center, pressure-compensating system - Starting 2026
Rated RPM	2250.0 rpm - Starting 2026
Steering Articulation Angle Each Direction	40.0 degrees - Starting 2026
Steering Articulation Full Arc Angle	80.0 degrees - Starting 2026
Steering Type (ISO 5010)	Power, fully hydraulic - Starting 2026
System Pressure At Max Rated Flow	3350.0 psi - Starting 2026
Turning Radius (Measured To Centerline Of Outside Tire)	18.25 ft, in. - Starting 2026

Key Specs

John Deere 644 G-Tier Wheel Loader Key Specs specifications
Net Peak Power	1700.0 rpm - Starting 2026
Net Peak Power At Rated RPM (ISO 9249)	235.00 hp (175.24 kw) - Starting 2026
Net Peak Torque	1400.0 rpm - Starting 2026
Net Peak Torque At Rated RPM (ISO 9249)	755.00 lbs ft (1,023.63 nm) - Starting 2026

Serviceability

John Deere 644 G-Tier Wheel Loader Serviceability specifications
Axle Oil Without Coolers (Front And Rear, Each) Refill Capacity	6.60 gal (24.98 l) - Starting 2026
Cooling System Refill Capacity	31.7 qt - Starting 2026
Engine Oil With Vertical Spin-On Filter Refill Capacity	22.2 qt - Starting 2026
Fuel Tank (With Lockable Cap) Refill Capacity	79.30 gal (300.15 l) - Starting 2026
Hydraulic Reservoir With Filter Refill Capacity	26.40 gal (99.92 l) - Starting 2026
Parking Brake Oil (Wet Disc) Refill Capacity	22.0 oz. - Starting 2026
Transmission Reservoir With Vertical Filter Refill Capacity	6.60 gal (24.98 l) - Starting 2026

Transmission System

John Deere 644 G-Tier Wheel Loader Transmission System specifications
Operator Interface	Joystick-mounted F-N-R; Quick-Shift button on hydraulic lever - Starting 2026
Shift Control	Electronically modulated, adaptive, load and speed dependent - Starting 2026
Shift Modes	Manual/auto (1st–D or 2nd–D); Quick-Shift button with 2 selectable modes: kick-down or kick-up/down; and 3 adjustable clutch cutoff settings - Starting 2026
Torque Converter	Single stage, single phase - Starting 2026
Type	Countershaft-type PowerShift™ - Starting 2026

Wheels And Tires

John Deere 644 G-Tier Wheel Loader Wheels And Tires specifications
Tread Width On Standard Tires	85.40 in (216.92 cm) - Starting 2026
Width Over Tires On Standard Tires	108.90 in (276.61 cm) - Starting 2026

Our Main Office

Construction Equipment Guide
470 Maryland Drive
Fort Washington, PA 19034
800-523-2200

About Us

Construction Equipment Guide covers the nation with its four regional newspapers, offering construction and industry news and information along with new and used construction equipment for sale from dealers in your area. Now we extend those services and information to the internet. Making it as easy as possible to find the news and equipment that you need and want.

Contents Copyrighted 2026, by Construction Equipment Guide, which is a Registered Trademark, registered in the U.S. Patent Office. Registration number 0957323. All rights reserved, nothing may be reprinted or reproduced (including framing) in whole or part without written permission from the publisher. All editorial material, photographs, drawings, letters, and other material will be treated as unconditionally assigned for publication and copyright purposes and are subject to Construction Equipment Guide’s unrestricted right to edit and comment editorially. Contributor articles do not necessarily reflect the policy or opinions of this publication.

Read our privacy policy here.
Mastodon