John deere

John Deere 644 Wheel loaders

100K+ machines in details.

John Deere 644 Wheel loaders tech specs

Video[1]

Interior [2]

Exterior [4]

Attachments [2]

2015-2019

2,896 mm Max dump height

1,615 mm Max dump reach

John Deere PowerTech PSS 6090 Engine model

173 kw Gross power

3 cu m Bucket capacity

18,682 kg Operating weight

The John Deere 644K (2015–2019) is a heavy-duty mid-size wheel loader built for serious productivity. It brings about 173 kW (232 hp) from a Tier 3 PowerTech engine, weighs in at 18.3–18.7 t, and handles 2.8–3.2 m³ buckets. With a breakout force of 15,378 kg, it's designed to load fast and carry big—without sacrificing reliability.

Engine: PowerTech 6068H, Tier 3 – 173 kW (232 hp)

Operating Weight: ~18,333 kg (40,417 lb) to ~18,682 kg (41,188 lb)

Bucket Capacity: ~2.8–3.2 m³ (4.0–4.25 yd³)

Breakout Force: ~15,378 kg (33,903 lb)

Travel Speed: Up to ~40 km/h via PowerShift transmission

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Makana rating

Owner rating

| 1

Market average

AED 850,000

Starting from

AED 690,000

John deere 644 Technical specifications

Loader

Breakout force

150.81 kN

General

Max dump height

2896 mm

Tire size

23.5 R25

Engine model

John Deere PowerTech PSS 6090

Transmission type

Powershift

Bucket capacity

3.06 cu m

Operating weight

18,682 kg

Service refill capacities

Hydraulic fluid cap

105.22 liter

Transmission fluid cap

23.09 liter

Front axle fluid capacity

22.33 liter

Fuel cap

397.05 liter

Rear axle fluid capacity

22.33 liter

Dimensions

Height - top of cab

3.44 m

Transport length

8 m

Turning radius

13.29 m

Wheelbase

3.26 m

Transport width

2 m

Operating specifications

Max dump reach

1615.44 mm

Brake system

Wet Multi Disc - Transmission

Engine

Alternator supplied amperage

130 Amh

Displacement

9001.43 cu cm

Emissions

Tier 4

Gross power

173.01 kw

Max torque

1062 Nm

Torque rise

56 %

Hydraulic system

Pump type

Piston

Pump flow cap

297.12 lpm

Relief valve pressure

250.97 bar

Download datasheets

OEM product brochure

John deere 644 expert review

Reviewed by Raul M. on September 4, 2025

Overview

Heavy-duty loader built to last. Designed for high-output performance with engineering for uptime—Quad-Cool, payload options, and service accessibility.

Pros Exceptional breakout and bucket fit.
Technology for uptime: Payload, LCD, PowerShift.

Cons Size demands site/transport prep.
Fuel efficiency less than Tier 4 loaders.

Performance & Efficiency

Consistent breakout with smart thermal control and fast cycles via PowerShift transmission.

In Comparison

Volvo L110E offers smoother ride, Komatsu WA470-8 has larger bucket—Deere wins on support and uptime.

Verdict

For serious loader work where uptime, power, and simplicity matter—the 644K is a sharp pick. K-Series II adds newer emissions tech, but the original stays robust.