At a glance
Key specifications
Overall dimensions
Measurement basis: 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.
Precision visual reference
Dimensions and working range
Published measurements for the stated configuration. Illustration not to scale.
Overall Size
Measurement basis: 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.
Working Range
Measurement basis: 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.
Reference details
Overall measurement views reviewed 2026-09-06. Illustrative artwork, not a scale drawing.
Documented generation; confirm the individual machine serial/PIN and installed configuration · United States / North American reference
Canonical reference: heavyeq.ca/specs/wheel-loaders/john-deere/644-p-tier/ · Printed from HeavyEQ.ca. Confirm the actual machine and current manufacturer documentation before transport or operation.
Year, generation & configuration
Model generation and configuration
- Generation / series
- Current P-Tier
- Applicable region
- United States / North American reference
- Year handling
- Confirm the serial/PIN and production year when matching an individual machine to this reference.
Model identity
Model family, generation & status
- Model family
- John Deere 644 P-Tier
- Generation / record
- Current P-Tier
- Product status
- Current model — status checked August 2026
- Regional scope
- United States / North American reference
No verified lineage relationship published. HeavyEQ reviewed first-party sources and did not force a predecessor or successor from model numbering.
United States / North American reference
Verified specifications
Values retain their cited source, verification status and original publication basis. Imperial is presented first while manufacturer-published dual units and configuration context remain attached to every value.| Specification | Imperial | Metric | Standard / configuration | Source |
|---|---|---|---|---|
| Net engine power | 249 hp | 186 kW | At 1,800 rpmManufacturer verified | John Deere |
| Operating-weight range | 41,246–41,324 lb | 18,709–18,744 kg | Published configuration rangeManufacturer verifiedSafety-sensitive value — verify the exact machine. | John Deere |
| Bucket-capacity range | 4.0–4.75 yd³ | 3.1–3.6 m³ | Published general-purpose rangeManufacturer verified | John Deere |
| Overall length — bucket on ground | 27 ft 1 in | 8.26 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verifiedSafety-sensitive value — verify the exact machine. | First-party citation pending |
| Width over tires — standard | 9 ft 5 in | 2.875 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verifiedSafety-sensitive value — verify the exact machine. | First-party citation pending |
| Height over cab | 11 ft 4 in | 3.45 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verifiedSafety-sensitive value — verify the exact machine. | First-party citation pending |
| Height to hinge pin, fully raised | 13 ft 5 in | 4.09 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verified | First-party citation pending |
| Dump clearance, 45 deg., full height | 9 ft 4 in | 2.84 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verifiedSafety-sensitive value — verify the exact machine. | First-party citation pending |
| Reach, 45-deg. dump, full height | 3 ft 7 in | 1.10 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verifiedSafety-sensitive value — verify the exact machine. | First-party citation pending |
| Wheelbase | 10 ft 10 in | 3.31 m | 644 P-Tier standard linkage, 23.5R25 tires and the brochure's general-purpose bucket with bolt-on edge.Authorized dealer verified | First-party citation pending |
What the specifications mean
The general-purpose bucket and bolt-on edge help define length and dump geometry. Another tool or high-lift package needs a separate clearance comparison.
A mid-size wheel-loader comparison with a standard-linkage, bucket-on-ground dimensional reference.
Alternatives worth comparing
These are research paths, not interchangeable configurations or a ranked winner.Caterpillar 950 Wheel Loader
Its published overall length explicitly excludes the bucket, unlike several alternatives. Use a confirmed bucket-included transport measurement before arranging a haul.
ExploreKomatsu WA380-8 Wheel Loader
The weight and bucket-capacity ranges cover configurations beyond the single standard-boom geometry. Match tires and bucket before reading a range endpoint as the offered machine.
ExploreConfiguration intelligence
Configurations & specification differences
These observations are scoped to the cited generation and region. They are not a list of valid option combinations.
| Record | Verified observation | Scope |
|---|---|---|
| Combined Build Configuration | Standard and high-lift arms require separate tipping-load and clearance data. | Current P-TierUnited States / North American reference |
| Combined Build Configuration | Tires, coupler, bucket and guarding change final mass and dimensions. | Current P-TierUnited States / North American reference |
| Technology Package | Payload and scale systems should be checked for function and calibration. | Current P-TierUnited States / North American reference |
A brochure configuration is not an individual marketplace machine. Serial/PIN and build information are required for exact verification.
Used 644 P-Tier inspection priorities
- Inspect articulation, steering joints, linkage and bucket mounting; identify the tire and lift-linkage package.
- Record the exact serial/PIN, installed options and inspection limitations. These are purchase inspection priorities, not claims of a model-specific failure pattern.
Configuration-aware inspection: these checks are triggered by machine category, installed configuration and technology package. Brochure-listed technology must be physically present, active, licensed and calibrated on the used machine.
Hours, condition and ownership cost
Hours are context, not a condition grade. Duty cycle, idle time, maintenance evidence, wear-system measurements, structural repairs and installed technology should be evaluated together.
Cost drivers to model
- Compare the useful loading cycle and bucket package with other mid-size loaders using actual material density and truck geometry.
- Use the ownership calculator with quoted repairs, actual scheduled hours, utilization and transport costs; leave unknown assumptions visible.
Compatibility graph
Attachment considerations
Relationships below identify relevant classes only unless a stronger evidence state is shown. They never assert exact used-attachment fitment.
Buckets, forks and grapples
Verify coupler interface, hydraulic controls, attachment weight and load centre, lift configuration.
Open attachment researchSnow attachments
Verify coupler interface, hydraulic and electrical requirements, machine stability.
Open attachment researchBefore confirming fitment
- generation and machine configuration
- mounting interface, coupler or pin geometry
- hydraulic flow, pressure, return and case drain
- attachment weight and machine capacity limits
- electrical controls or required machine options
Model-reference transport profile
Transport reference
Reference measurements retain their configuration and verification status. Confirm the actual transport setup before booking.
Reference specifications can differ from the actual configured machine. Confirm dimensions and weight before booking transportation.
Use the equipment transport dimensions worksheet to record this 644 P-Tier's actual travel configuration, measured length, width and height, weight evidence and any detached components. Send the completed record to the carrier with the loading details.
Confirm or replace before a transport request
- actual weight
- actual travel length, width and height
- attachments and removable work tools
- bucket, blade or boom position
- loading condition
Source provenance
First-party sources and verification notes
Only manufacturer-authored records are linked publicly. Provisional measurements remain marked until a matching first-party record is confirmed.644 P-Tier Mid-Size Wheel Loader
United States · exact model technical page · accessed September 5, 2026 · status: Manufacturer verified
