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John Deere 644 P-Tier
Configuration: Z-Bar linkage, 3.2 m³ (4.25 yd³) pin-on enhanced-performance bucket with bolt-on edge, Michelin 23.5R25 L-3 tires, standard 5-speed with lockup; EPA Final Tier 4/EU Stage V.
24 sourced values · Sources: John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24
Dimension diagram
| A | Overall length | ≈ 8,330 mm |
| B | Overall height | ≈ 3,450 mm |
| C | Wheelbase | ≈ 3,310 mm |
| D | Ground clearance | 386 mm |
| E | Overall width | 2,875 mm |
| F | Track gauge / tread | 2,170 mm |
Weights
| Spec | Value | Source |
|---|---|---|
| Operating weight | 18,709 kg | Published: 18,709 kg John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24Z-Bar, 3.2 m³ pin-on bucket; ROPS cab, std counterweight, guards, std tires, full fuel, 79 kg operator. |
Dimensions
Undercarriage / tires
| Spec | Value | Source |
|---|---|---|
| Undercarriage type | Wheeled, articulated | Published: Wheeled, articulated John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 |
| Number of axles | 2 | Published: 2 John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 |
| Wheels (count) | 4 | Published: 4 John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 |
| Tire size | 23.5R25 (Michelin 1 Star L-3) | Published: 23.5R25 (Michelin 1 Star L-3) John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 |
Ground pressure
| Spec | Value | Source |
|---|---|---|
| Ground pressure | Not published | John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 Not published. |
Axle loads
| Spec | Value | Source |
|---|---|---|
| Axle load, front (unladen/operating) | Not published | John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 Not published. |
| Axle load, rear (unladen/operating) | Not published | John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 Not published. |
Engine
| Spec | Value | Source |
|---|---|---|
| Engine model | John Deere PowerTech PSS 6068 | Published: John Deere PowerTech PSS 6068 John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24EPA Final Tier 4 / EU Stage V. |
| Net power | 186 kW | Published: 186 kW John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24Net peak power ISO 9249 at 1,800 rpm (249 hp). Gross peak 194 kW. |
| Gross power | Not captured | — |
| Displacement | 6.8 L | Published: 6.8 L John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24 |
| Rated speed | 1,800 rpm | Published: 1,800 rpm John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24Speed for net peak power. |
Hydraulics
| Spec | Value | Source |
|---|---|---|
| Pump / aux flow | 310 L/min | Published: 310 L/min John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24Maximum rated flow at 6,895 kPa and 2,250 rpm (loader and steering pump). |
| System / relief pressure | ≈ 25.2 MPa | Published: 25,166 kPa John Deere 644 P-Tier Wheel Loader brochure/specifications MW644PAU (23-03). Retrieved 2026-10-24System relief pressure, loader and steering (3,650 psi). |
Performance
Similar models
| Brand | Model | Operating weight |
|---|---|---|
| Volvo | L110H | 18,750 kg |
| Caterpillar | 950 GC | 18,849 kg |
| Liebherr | L 550 XPower | ≈ 18,550 kg |
| Komatsu | WA380-8 | 18,455 kg |
| Hitachi | ZW220-7 | 18,150 kg |
| Caterpillar | 950 | 18,076 kg |
Compare side by side with Volvo L110H and Caterpillar 950 GC