Specification sheet Wheel Loader Ref john-deere-644k-wheel-loader
John Deere 644K
The John Deere 644K is a wheel loader with an operating weight of 41,186.76 lb (18,682 kg).
✓ QA-verified — every figure checked for unit consistency, physical possibility, and class plausibility; failures withheld → Operating weight
41,186.76lb
18,682kg
◆Where it sits in its classpercentile · small wheel loaders
Among 439 small wheel loaders (22,000–45,000 lb), the John Deere 644K sits at the heavy end of its class:
- Operating weight 41,190 lb heavier than 89% (n=439)
Not positioned on engine power, bucket capacity — withheld or unpublished for this machine.
01 Engine Specification
| Pump | Piston | |
|---|---|---|
| Engine Output-Net | 232hp | 173kw |
| Transmission Type | Powershift | |
| Engine Make | John Deere | |
| Engine Model | PowerTech PSS 6090 | |
| Torque | 783.3lb ft | 1062Nm |
| Rated Speed | 1700rpm | |
| Displacement | 549.3cu in | 9L |
| Torque Rise | 56% | |
| System Voltage | 24V | |
| Emission Level | Tier 4 | |
| Alternator | 130amps |
02 Driveline Specification
| Ride Control System | Optional | |
|---|---|---|
| Service Brake Type | Wet Disc | |
| Parking Brake Type | Wet Multi Disc - Transmission | |
| Differential Lock | Front- Locking, Rear- Open | |
| Service Brake Actuation | Hydraulic | |
| Tire Size - Standard | 23.5 R25 | |
| Service Brake - Location | Axle Inboard |
03 Capacities Specification
| Hydraulic Tank | 27.8gal | 105.2L |
|---|---|---|
| Heaped Capacity | 4.2yd3 | 3.2m3 |
| Transmission | 6.1gal | 23L |
04 Operational Specification
| Operating Weight | 41186.8lb | 18682kg |
|---|---|---|
| Fuel Capacity | 104.9gal | 397L |
| Front Axle/Diff Fluid Capacity | 5.9gal | 22L |
| Rear Axle/Diff Fluid Capacity | 5.9gal | 22L |
05 Transmission Specification
| Pump Flow | 78.5gal/min | 297L/min |
|---|---|---|
| System Pressure | 251.7psi | 1735.2kPa |
06 Bucket Dimensions
| Breakout - Bucket | 15378 (33903) kgf (lbf) | |
|---|---|---|
| Bucket Capacity - Smallest | 4.06yd3 | 3.1m3 |
| Largest Bucket Capacity | 4.19yd3 | 3.2m3 |
07 Dimensions Dimensions
| Ground Clearance | 18.15in | 461mm |
|---|---|---|
| Length With Bucket On Ground | 27.24ft in | 8300mm |
| Width Over Tires | 9.44ft in | 2875mm |
| Wheelbase | 10.7ft in | 3260mm |
| Hinge Pin - Max Height | 13.52ft in | 4120mm |
| Reach At Max Lift And Dump | 5.29ft in | 1610mm |
| Turning Circle | 43.57ft in | 13280mm |
| Height Over Cab | 11.26ft in | 3430mm |
?Questions & answersfrom this machine's data
- How much does a John Deere 644K wheel loader weigh?
- A John Deere 644K wheel loader has an operating weight of 41,186.8 lb (18,682 kg).
- How much fuel does a John Deere 644K wheel loader hold?
- A John Deere 644K wheel loader has a fuel capacity of 104.9 gal (397 L).
- What is the ground clearance of a John Deere 644K wheel loader?
- A John Deere 644K wheel loader has a ground clearance of 18.2 in (461 mm).
- How long is a John Deere 644K wheel loader?
- A John Deere 644K wheel loader has an overall length of 27.2 ft (8,300 mm) with the bucket on the ground.
Method. Figures are manufacturer reference specifications, not measurements. Every value is checked for unit consistency, physically possible magnitude, and plausibility for its equipment class before publication; figures that fail any check are withheld rather than shown, and figures reconstructed from related data are marked above. Imperial and metric figures are reproduced as published, except where a note states otherwise.