08-11-2025, 10:51 PM
Overview
The Komatsu PC45MR family—featuring models like the PC45MR, PC45MR-3, PC45MR-5, and PC45MRX-1—offers tight-tail-swing hydraulic excavators ideal for urban, utility, and confined-space operations. These machines blend compact dimensions with substantial digging power and smart hydraulics.
Key Specifications & Features
Engine & Performance
- Powered by a Komatsu 4-cylinder, direct-injection engine (model 4D88E-7) delivering around 38 hp @ 2,400 rpm .
- Operating weight ranges between 10,700 and 11,000 lbs, depending on canopy or cab, with rubber track undercarriage .
- Engineered for tight jobsite maneuverability, the minimal tail swing extends only about 60 mm beyond the tracks .
- Equipped with Komatsu’s HydrauMind system enabling two selectable work modes that adjust hydraulic behavior for fuel savings or higher productivity .
- Features variable displacement piston pumps and dedicated swing and blade pumps, delivering 153 L/min (40 gpm) flow to working circuits .
- Dig depth up to approximately 12 ft, and maximum reach around 19–20 ft, depending on boom and arm configuration .
- Compact undercarriage—track width around 1.96 m—enables transport on narrow trailers or through tight spaces .
- Spacious, accessible cabin or canopy with excellent visibility, comfortable suspension seat, and intuitive joystick controls .
- Service access is simplified by wide-opening engine hoods, side panels, tilting operator station, and grouped grease points on booms .
- Integrated KOMTRAX telematics provide monitoring for maintenance, operation history, and remote diagnostics .
- Users can choose among rubber, steel, or road-liner tracks, plus optional attachments like power-angle blades and auxiliary hydraulics for tools like breakers or thumbs .
Operators in tight urban settings value the PC45MR’s tight-tail frame, which allows full swing without risking damage to nearby walls or equipment. One anecdotal report highlights a landscaping contractor swapping buckets and ripper attachments quickly using the auxiliary hydraulics and retaining power, thanks to HydrauMind mode adjustments.
Terminology Quick Glossary
- Tight Tail Swing (MR): Minimal protrusion behind the excavator’s footprint for operation in cramped areas.
- HydrauMind: A smart hydraulic setup that optimizes power usage and control responsiveness.
- KOMTRAX: Komatsu’s wireless machine-monitoring system offering telematics and maintenance alerts.
- Match track type to ground conditions—rubber tracks for paved or delicate surfaces, steel for rough or abrasive terrain.
- Utilize KOMTRAX data to schedule maintenance proactively and maintain peak hydraulic efficiency.
- Choose auxiliary hydraulics for attachments to avoid manual coupling—enhances safety and productivity.
- For tight areas, the minimal tail swing offers major shields against structural contact; always observe full swing clearance.
- Compact Excavator Class: 38 hp, ~10,700–11,000 lbs weight.
- Hydraulic System: HydrauMind with selectable modes and auxiliary options.
- Work Range: ~12 ft dig depth, ~20 ft reach.
- Access & Maintenance: Great service access, KOMTRAX enabled.
- Operator Environment: Comfortable seat, excellent visibility, user-friendly controls.
Komatsu’s PC45MR series strikes a strong balance between compactness and capability. With intuitive controls, rugged hydraulics, tight-swing design, and smart service features, it’s ideal for operators needing precision, power, and flexibility in confined job sites. Want a spec sheet, attachment list, or maintenance schedule? I’d be happy to help further.
