Komatsu PC138US-11
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Komatsu PC138US-11 Compatible Attachments
The Komatsu PC138US-11 is a 13.9–14.8-ton class short-tail hydraulic excavator, engineered to deliver exceptional workability and environmental performance with a powerful yet fuel-efficient EU Stage IV engine. Delivering 72.6 kW (97.3 HP) at 2,050 RPM, this machine combines Komatsu's Closed Center Load Sensing (CLSS) hydraulic system with first-class operator comfort for fast response and unrivalled productivity in confined work environments.
With a short tail swing radius of just 1.48 m and exceptional stability, the PC138US-11 is ideal for urban construction, road work, logging, demolition, and site preparation where space is restricted. The machine features six working modes, Komatsu fuel-saving technology with up to 5% lower consumption, and 100% passive regeneration requiring no DPF. Attachment fitment should be checked against the machine's carrier weight, hydraulic flow and pressure, pin dimensions, boom configuration, and the material being handled. BHE Attachments can help review these details before quoting or installing an attachment.
Komatsu PC138US-11 Attachment Matches
The attachment categories below are organized for the Komatsu PC138US-11 carrier class. Final compatibility should be confirmed using the exact machine configuration, hydraulic setup, mounting dimensions, coupler style, and job application.
Hydraulic Breakers for Concrete, Rock & Asphalt
Hydraulic breakers and hammers are a key attachment match for the Komatsu PC138US-11 when the job requires concrete breaking, rock breaking, asphalt removal, trenching through hard material, or demolition support in urban areas and confined commercial spaces.
Montabert breaker models previously identified for review with this carrier class include the 501NG and XL1000. Final selection should be based on the carrier's hydraulic flow of 242 L/min with HydrauMind closed-center load sensing system, 35.5 MPa relief valve setting, breaker weight, bracket setup, and duty cycle. The machine features a dedicated Breaker mode that optimizes engine and hydraulic pump performance for breaker operation.
Digging, Trenching, Grading & Cleanup Buckets
Bucket selection for the Komatsu PC138US-11 should match the work being performed. Digging buckets are commonly used for excavation and trenching in urban and roadwork projects, while grading or cleanup buckets are better suited for ditching, slope work, backfill shaping, and finish grading.
Bucket fitment should be checked by pin diameter, pin spread, stick width, coupler configuration, width, capacity, tooth style, edge type, and material conditions. The PC138US-11 offers mono boom and two-piece boom configurations with 2.5 m and 3.0 m arm options. Maximum bucket capacity is 0.72 m3 with a bucket digging force of 9,500 kgf (ISO) for powerful breakout performance.
Couplers, Thumbs & Grapples
Couplers, thumbs, and grapples can improve the Komatsu PC138US-11's versatility for attachment changes, debris handling, brush handling, demolition cleanup, pipe handling, and sorting material on job sites where urban construction and road work demand frequent tool changes.
These tools should be reviewed for stick geometry, thumb length, coupler type, hydraulic plumbing, bracket style, and the machine's lifting and stability limits. The PC138US-11 features a short tail swing radius of 1.48 m and exceptional stability with minimal protrusions at both front and rear. The machine is prepared for hydraulic quick-coupler with power circuit, and a second auxiliary hydraulic line is available for attachments requiring extra hydraulic actuation.
Plate Compactors for Trench & Backfill Work
Plate compactors can be reviewed for the Komatsu PC138US-11 when the work involves trench compaction, utility installation, backfill compaction, road repair, or site preparation in urban and confined work zones.
Compactor compatibility should be confirmed by attachment weight, hydraulic flow, pressure range, mounting bracket, hose routing, and the compaction area required for the job. The PC138US-11 delivers 242 L/min maximum hydraulic flow with HydrauMind closed-center system and pressure compensation valves. Six working modes including Attachment Power and Attachment Economy modes optimize two-way flow attachment performance with adjustable oil flow directly on the widescreen monitor.
Rippers & Specialty Excavator Tools
Rippers and specialty tools may be considered for the Komatsu PC138US-11 when the machine is working in compacted soil, frost, hardpan, rocky material, or site preparation conditions where a standard bucket is not the most efficient first tool.
Tool selection should be based on material type, breakout needs, carrier size, mounting setup, and whether the tool will be used before bucket excavation or as part of demolition cleanup. The PC138US-11 delivers 9,500 kgf bucket digging force and 6,300 kgf arm crowd force (ISO) with a powerful Komatsu SAA4D95LE-7 engine for tough ground conditions. The short implement swing radius of 1.98 m allows work close to obstacles.
Komatsu PC138US-11 Jobsite Applications
These application notes help connect the Komatsu PC138US-11 to the attachment type most often used for each kind of work.
Concrete & Rock Breaking
Use a properly sized hydraulic breaker or hammer when the Komatsu PC138US-11 is assigned to concrete removal, rock breaking, asphalt removal, trench obstruction removal, or demolition prep in urban and confined commercial spaces.
Excavation & Trenching
Use digging, trenching, or rock buckets when the machine is being used for utility installation, drainage work, road construction, foundations, landscaping, and general excavation in tight-access areas.
Grading & Cleanup
Use grading, cleanup, or ditching buckets when the job requires finish shaping, slope work, ditch cleaning, loose material handling, or surface cleanup on roadwork and urban job sites. An optional dozer blade adds 800 kg for ground leveling.
Material Handling
Use thumbs, grapples, or coupler-supported tools when the Komatsu PC138US-11 needs to handle debris, brush, pipe, demolition material, or irregular objects in restricted urban and highway work zones.
Compaction
Use a plate compactor when the machine is supporting trench backfill, utility repair, road repair, or site preparation where controlled compaction is needed in limited urban work areas.
Hard Ground Preparation
Use a ripper or specialty ground-engagement tool when compacted soil, frost, hardpan, or rocky material needs to be loosened before excavation in urban construction or road work settings.
Attachment Fitment Factors
The Komatsu PC138US-11 should be matched with attachments using both machine specifications and jobsite requirements. These checks help reduce incorrect fitment, poor performance, and unnecessary attachment wear.
Machine & Mounting Requirements
- Confirm carrier operating weight (13,880–14,820 kg depending on shoe and boom configuration) and excavator size class.
- Check pin diameter, pin spread, stick width, and coupler configuration.
- Match the attachment bracket to the Komatsu PC138US-11 mounting setup.
- Review attachment weight against machine lifting capacity and stability limits.
- For buckets, confirm width, capacity, tooth style, edge type, and application rating.
- Verify boom configuration (mono or two-piece) and arm length (2.5 m or 3.0 m) for reach and access needs.
- Consider shoe width options (500, 600, or 700 mm triple grouser, or 500 mm road liner) for ground pressure and stability.
Hydraulic & Application Requirements
- Confirm hydraulic flow (242 L/min maximum) and pressure (35.5 MPa implement circuits) for powered attachments.
- Verify auxiliary hydraulic circuit setup, controls, and hose routing (one additional circuit with proportional control available).
- Select breaker tools based on material, including moil point, chisel, blunt, or specialty tools.
- Match the attachment to the material being worked: concrete, rock, asphalt, soil, brush, or debris.
- Review duty cycle, production needs, operator use, and jobsite conditions before final selection.
- Consider working mode selection (Power, Economy, Lifting, Breaker, Attachment Power, Attachment Economy) for optimal attachment performance.
Komatsu PC138US-11 Attachment Overview
Use this table as a quick reference for matching common Komatsu PC138US-11 attachment categories to their main purpose.
| Carrier Model | Attachment Type | Best Use | Fitment Checks | Typical Applications |
|---|---|---|---|---|
| Komatsu PC138US-11 | Hydraulic Breakers & Hammers | Breaking concrete, rock, asphalt, and hard material in urban and confined spaces. | Hydraulic flow, pressure, breaker weight, bracket, tool type, and duty cycle. | Demolition, road repair, trenching, concrete removal, rock breaking. |
| Komatsu PC138US-11 | Excavator Buckets | Digging, trenching, grading, ditching, cleanup, and material loading. | Pin dimensions, coupler setup, bucket width, capacity, tooth style, and edge type. | Excavation, utility work, grading, drainage, roadwork, site development. |
| Komatsu PC138US-11 | Couplers, Thumbs & Grapples | Changing attachments and handling loose, bulky, or irregular material. | Stick geometry, coupler type, thumb length, hydraulic plumbing, and lift limits. | Debris handling, brush handling, pipe handling, demolition cleanup. |
| Komatsu PC138US-11 | Plate Compactors | Compacting trench backfill, soil, and utility repair areas. | Hydraulic flow, pressure range, compactor weight, bracket, and hose routing. | Trench compaction, road repair, backfill, utility installation, site prep. |
| Komatsu PC138US-11 | Rippers & Specialty Tools | Loosening compacted or hard material before excavation. | Carrier size, mounting setup, tooth design, material conditions, and breakout needs. | Hardpan, frost, rocky soil, site prep, pre-excavation ripping. |
Final compatibility can vary by Komatsu PC138US-11 configuration, coupler, pin dimensions, hydraulic setup, and job application. Always verify fitment before purchasing or installing an attachment.
Find the Right Attachment for Your Komatsu PC138US-11
BHE Attachments can help compare hydraulic breakers, buckets, couplers, thumbs, compactors, grapples, rippers, and specialty tools for the Komatsu PC138US-11. The best attachment depends on whether the machine will be breaking, digging, grading, compacting, handling material, or preparing hard ground in confined urban and roadwork environments.
To narrow the right option, provide the machine serial number if available, current coupler setup, hydraulic flow and pressure information, pin dimensions, boom and arm configuration, and a short description of the work being performed.
Need Help Confirming Compatibility?
BHE Attachments can review your Komatsu PC138US-11 specifications, hydraulic requirements, mounting setup, pin dimensions, coupler configuration, and application needs to help identify the right attachment category and product fit.
Ready to quote attachments for your Komatsu PC138US-11?
Send the machine setup and job application to BHE Attachments so the attachment recommendation can be matched to the Komatsu PC138US-11 carrier class, hydraulic setup, mounting requirements, and work conditions.