John Deere 644K Wheel Loader

Weights
Operating Weight

41186.8 lb

Boom / Stick / Bucket
Bucket Capacity - Smallest

4.06 yd3

Largest Bucket Capacity

4.19 yd3

Engine & Fuel System
Engine Make

John Deere

Engine Model

PowerTech PSS 6090

Engine Output-Net

232 hp

Fuel Capacity

104.9 gal

Torque

783.3 lb ft

Torque Rise

56%

Emission Level

Tier 4

Displacement

549.3 cu in

Drive System
Parking Brake Type

Wet Multi Disc – Transmission

Service Brake Actuation

Hydraulic

Service Brake - Location

Axle Inboard

Service Brake Type

Wet disc

Hydraulic System
Hydraulic Tank

27.8 gal

Pump Flow

78.5 gal/min

Pump

Piston

System Pressure

251.7 psi

Dimensions, Wheels & Tires
Tire Size - Standard

23.5 R25

Wheelbase

10.7 ft in

Width Over Tires

9.44 ft in

Ground Clearance

18.15 in

Height - Over Cab

11.26 ft in

Battery & Electrical System
Alternator

130 A

System Voltage

24 V

Transmission
Transmission

6.1 gal

Transmission Type

powershift

Rated Speed

1700 rpm

Technical Specs
Breakout - Bucket

15378 (33903) kgf (lbf)

Length With Bucket On Ground

27.24 ft in

Hinge Pin - Max Height

13.52 ft in

Reach At Max Lift And Dump

5.29 ft in

Turning Circle

43.57 ft in

Ride Control System

Optional

Differential Lock

Front- Locking, Rear- Open

Heaped Capacity

4.2 yd3

Rear Axle/Diff Fluid Capacity

5.9 gal