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Caterpillar 305 CR vs Komatsu PC45MR-5
Published specs and dimensions of two mini excavators side by side. Every value comes from the manufacturer document cited on each model page; ≈ marks a unit conversion.
Key differences
The Caterpillar 305 CR is 13 lb (6 kg) heavier, 1 in (20 mm) wider and 1 in (25 mm) shorter than the Komatsu PC45MR-5.
Both list the same overall height.
- Net power: 33.6 kW / 45.1 hp (Caterpillar 305 CR) vs 28.3 kW / 38 hp (Komatsu PC45MR-5); Caterpillar 305 CR is higher.
- Track length (overall): 2,580 mm / 8 ft 6 in (Caterpillar 305 CR) vs 2,520 mm / 8 ft 3 in (Komatsu PC45MR-5); Caterpillar 305 CR is higher.
- Ground clearance: 335 mm / 13.2 in (Caterpillar 305 CR) vs 290 mm / 11.4 in (Komatsu PC45MR-5); Caterpillar 305 CR is higher.
- Tail swing radius: 1,095 mm / 3 ft 7 in (Caterpillar 305 CR) vs 1,040 mm / 3 ft 5 in (Komatsu PC45MR-5); Caterpillar 305 CR is higher.
- Ground pressure: 27.3 kPa / 3.96 psi (Caterpillar 305 CR) vs 28 kPa / 4.06 psi (Komatsu PC45MR-5); Komatsu PC45MR-5 is higher.
- Displacement: 1.662 L / 101 cu in (Caterpillar 305 CR) vs 2.19 L / 134 cu in (Komatsu PC45MR-5); Komatsu PC45MR-5 is higher.
Computed from the published figures for each model's stated configuration (listed below the table). Options such as boom, bucket, tracks or tires change these numbers.
Caterpillar 305 CR specs Komatsu PC45MR-5 specs Open in interactive compare Trailer fit: Caterpillar 305 CR Trailer fit: Komatsu PC45MR-5
Side-by-side specs
Use the Metric / Imperial switch at the top to change units. Highlighted rows differ.
| Spec | Caterpillar 305 CR | Komatsu PC45MR-5 |
|---|---|---|
| Weights | ||
| Operating weight | 4,996 kg | 4,990 kg |
| Dimensions | ||
| Overall length | 5,305 mm | 5,330 mm |
| Overall width | 1,980 mm | 1,960 mm |
| Overall height | 2,550 mm | 2,550 mm |
| Track gauge / tread | Not published | 1,560 mm |
| Track length on ground | Not published | 2,000 mm |
| Track length (overall) | 2,580 mm | 2,520 mm |
| Shoe / track width | 400 mm | 400 mm |
| Ground clearance | 335 mm | 290 mm |
| Tail swing radius | 1,095 mm | 1,040 mm |
| Undercarriage / tires | ||
| Undercarriage type | Rubber track | Crawler (rubber belt tracks; steel and Roadliner optional) |
| Track rollers / shoes per side | Not published | 4 track rollers, 1 carrier roller, 39 shoes per side |
| Ground pressure | ||
| Ground pressure | 27.3 kPa | 28 kPa |
| Engine | ||
| Engine model | Cat C1.7 Turbo | Komatsu 4D88E-7 |
| Net power | 33.6 kW | 28.3 kW |
| Gross power | 36.1 kW | 29.1 kW |
| Displacement | 1.662 L | 2.19 L |
| Rated speed | 2,400 rpm | 2,400 rpm |
| Hydraulics | ||
| Pump / aux flow | 133 L/min | 153.3 L/min |
| System / relief pressure | ≈ 26.5 MPa | 26.5 MPa |
| Performance | ||
| Max digging depth | 3,420 mm | 3,625 mm |
| Max reach (at ground) | 5,590 mm | 5,895 mm |
| Dump height / clearance | 3,700 mm | 3,705 mm |
| Breakout / digging force | 49.2 kN | 33.9 kN |
| Max travel speed | 5 km/h | 4.6 km/h |
Configurations.
Caterpillar 305 CR: Minimum configuration: canopy, rubber tracks, standard stick (1351 mm), straight blade, no extra counterweight, no bucket; Tier 4 Final/Stage V.
Komatsu PC45MR-5: ROPS cab, 400 mm rubber belt tracks, 2,640 mm one-piece boom, 1,695 mm arm, 0.14 m³ SAE heaped bucket, blade; EPA Tier 4 Final