United States / North American reference
Verified specifications
Values are manufacturer-published or faithfully converted from the cited manufacturer record. Manufacturer-published dual units are retained where available, and the basis column travels with every value.| Specification | Metric | Imperial | Standard / configuration |
|---|---|---|---|
| Net engine power | 33.6 kW | 45 hp | ISO 9249 · Manufacturer-published reference configuration |
| Operating-weight range | 4,996–5,754 kg | 11,016–12,688 lb | Minimum canopy to maximum cab configuration |
| Maximum digging depth | 3,670 mm | 144.5 in | Manufacturer reference configuration |
What the specifications mean
Use the applicable end of the weight range for trailer planning.
The depth figure screens trenching fit; boom swing and dump height still matter on tight sites.
ISO 9249 net power supports a fairer cross-brand comparison than unqualified horsepower.
Configurations and options to verify
- Canopy and cab minimum/maximum weights are published separately.
- Blade, arm, counterweight, track and coupler choices change the transport profile.
- Compact radius reduces rear overhang but does not eliminate clearance checks.
Used 305 CR inspection priorities
- Check rubber tracks, sprockets, rollers and idlers together; inspect final-drive leakage and travel response.
- Measure boom, arm, bucket, swing-post and blade-pin play, then test drift under load.
- Operate auxiliary hydraulics and the coupler with the intended tool where practical.
- Verify safety interlocks, display warnings, service access and cold-start behaviour.
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
- Track-system wear, compact access repairs and attachment utilization shape hourly cost.
- Separate idle hours from productive duty and review daily greasing and service evidence.
- Include trailer, tow vehicle, loading equipment and attachment changes in mobilization cost.
Attachments and compatibility
- Confirm pin pickup or coupler interface, tool weight and hydraulic requirements.
- Buckets, breakers, thumbs, augers and compactors can require different plumbing or controls.
- Check blade and counterweight configuration when attachment stability matters.
Transport planning
- Use scale-ready operating weight plus the actual bucket, coupler, blade and fluids—not the rounded machine class.
- Measure width and height in travel condition and confirm trailer, axle and tow-vehicle limits independently.
Manufacturer provenance
Sources and verification notes
Each exact value above points to one of these first-party records.Caterpillar
Open manufacturer source 305 CR Mini Hydraulic Excavator
United States · exact model technical page · verified August 2026 · confidence: manufacturer-verified