At a glance
Key specifications
Overall dimensions
Measurement basis: 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.
Precision visual reference
Dimensions and working range
Published measurements for the stated configuration. Illustration not to scale.
Overall Size
Measurement basis: 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.
Working Range
Measurement basis: 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.
Reference details
Visual visual:model-family:caterpillar:844:depth · revision 1 · generated 2026-09-08
Documented model generation; decorative reference illustration · Manufacturer North American reference
Canonical reference: heavyeq.ca/specs/wheel-dozers/caterpillar/844/ · 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
- 844 technical specifications AEXQ2666-02 — Semi-U blade
- Applicable region
- Manufacturer 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
- Caterpillar 844
- Generation / record
- 844 technical specifications AEXQ2666-02 — Semi-U blade
- Product status
- Production status not confirmed — status checked September 2026
- Regional scope
- Manufacturer North American reference
No verified lineage relationship published. HeavyEQ reviewed first-party sources and did not force a predecessor or successor from model numbering.
Manufacturer 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 |
|---|---|---|---|---|
| Length with Blade on Ground | 36 ft 6 in | 11,120 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Semi-U blade — Overall Width | 17 ft 9.3 in | 5,418 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Height to Top of ROPS | 17 ft 2.4 in | 5,240 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Semi-U blade — Overall Width | 17 ft 9.3 in | 5,418 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Semi-U blade — Height | 6 ft 7.7 in | 2,024 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Semi-U blade — Digging Depth | 1 ft 6.3 in | 465 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Semi-U blade — Ground Clearance | 4 ft 9.4 in | 1,459 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Wheelbase | 15 ft 1.2 in | 4,600 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verified | Caterpillar |
| Ground Clearance | 2 ft | 596 mm | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
| Semi-U blade — Total Operating Weight | 165,089 lb | 74,883 kg | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.Manufacturer verifiedSafety-sensitive value — verify the exact machine. | Caterpillar |
What the specifications mean
A Semi-U blade’s wings help retain material, but advertised capacity is not a guaranteed production rate. Compare material behaviour, push distance and cycle pattern.
Do not transfer the standard Semi-U height or weight to the heavy-duty blade. The brochure lists separate blade envelopes and total operating weights.
Configuration 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 |
|---|---|---|
| Reference configuration | 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine. | 844 technical specifications AEXQ2666-02 — Semi-U bladeManufacturer North American reference |
A brochure configuration is not an individual marketplace machine. Serial/PIN and build information are required for exact verification.
Used 844 inspection priorities
- Inspect blade corners and wing welds for evidence of side loading, and check tilt joints with the blade safely supported.
- Review brake, steering and tire records for the actual duty cycle; repeated loaded direction changes matter more than hours alone.
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
- Allow for tire handling and access to large components when assessing workshop support. A nominal hourly service allowance can omit these logistics.
- Match the purchase to sustained pushing work and haul-road conditions. Compare a smaller wheel dozer where access or intermittent duty governs the job.
Configuration
Equipment and configuration
Match the installed equipment to the serial-specific build record and the measurement basis shown above.
Configuration details to confirm
- Blade arrangement
- Stockpile or mine application
- Tires
- Counterweight
A model specification does not establish compatibility with a particular attachment or option.
Model-reference transport profile
Transport reference
Reference measurements retain their configuration and verification status. Confirm the actual transport setup before booking.
Measurement basis: 844 with standard Semi-U blade on ground and ROPS cab; manufacturer dimension drawing. Heavy-duty Semi-U and coal blades are different configurations; tire package must be confirmed on the actual machine.
Reference specifications can differ from the actual configured machine. Confirm dimensions and weight before booking transportation.
Confirm or replace before a transport request
- actual weight
- actual travel length, width and height
- attachments and removable work tools
- bucket, blade, carriage 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.844 technical specifications AEXQ2666-02 — Semi-U blade
Manufacturer North American reference · official technical document · accessed September 8, 2026 · status: Manufacturer verified