Attachments for the Komatsu PC78MR-6 weight range
- Bucket line
- GP - general purpose digging bucket300–800 mm wide
- We usually reply within 1 working day
- We check the fit before we send the quote
- Every offer names the dispatch week
- If a bracket we made is wrong and does not fit your machine, we replace it.
How is the attachment mounted on this machine?
Tell us what is on the machine now. It narrows the sizes we show and goes with your enquiry. It does not confirm fit: we check the bracket before we send the quote.
Catalogue sizes for the PC78MR-6
Each size below has a catalogue row rated for a carrier of 8,270 kg operating weight. Tell us which sizes you want and we reply with an offer.
Each family shows its candidate models by operating-weight range.
The attachments buyers in your market ask for first, sized for the PC78MR-6.
On a narrow screen the table scrolls sideways.
Tools
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
Non-bucket attachments | ||||
| DuoRIP - double ripper for root extraction | Duo-Ripper-12 | 450 | 220 | |
| GRB - excavator grading beam | GRB-MINI · 4 variants, GRBH-MINI · 2 width variants, GRB midi · 6 variants | 1,000–2,500 | 91–530 | |
Also available | ||||
| RC - root cutter | Root cutter-10 | 250 | 47 | |
| RRB - root rake bucket profile | RRB-90 | 1,500 | 233 | |
Other mini-ex attachments | ||||
| LR mini - straight land rakes for mini-excavator | LR-10 · 2 width variants | 1,000–1,400 | 219–300 | |
| LRS - short land rakes for mini-excavators | LRS-15 | 1,980 | 380 | |
| RIP mini - ripper shank for mini-excavator | Ripper-10 | 98 | ||
| MR mini - multi-ripper for mini-excavator | MRF 140 · 2 width variants | 1,000–1,200 | 221–228 | |
| AC mini - asphalt cutter for mini-excavator | AC-10 | 67 | ||
Buckets
Quick couplers
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
| QC-S - S-System Scandinavian quick-couplerStart herePrice & lead timeGet price & lead timeS-System (Scandinavian) | QC-S45-H, QC-S50, QC-S45-SA, QC-U-S45-H, QC-U-S50 | 70–232 | ||
| CW - CW-System compatible quick-couplerCW-System | CW-10, CW-20, CW-20 S, CW-U-10, CW-U-20, CW-U-20 S | 65–190 | ||
| QC-HS / QC-MS - MS-System compatible quick-couplerMS system | QC-HS-08, QC-MS-08, QC-U-HS-08 | 90–232 | ||
| QC-PG - pin-grabber quick-coupler for factory bracketsPin-grabber | QC-PG-50, QC-PG-55, QC-PG-60, QC-ML-M-50, QC-U-PG-50, QC-U-PG-55, QC-U-PG-60 | 58–352 |
Welded to EN ISO 3834-2. Agree it as a standing term of supply and the EN 10204 3.1 certificate ships with every attachment. You also get the CE declaration of conformity for every attachment. See the certificates.
Message us on WhatsAppPhotos and voice notes are welcome.Which coupler is on your machine?
Pick the system on your machine and we put it in your enquiry. We check the bracket before we send the quote.
How to measure your coupler
Not sure which system it is? Three measurements tell us which bracket you need.
- Measure the diameter of both pins.
- Measure the distance between the pin centres.
- Measure the width between the inside faces of the ears.
If the coupler has a make or type printed on it, send that too.
Before you order: check the interface
The weight class of the Komatsu PC78MR-6 sizes the attachment. It does not tell you the pin diameter, the pin spacing or the stick width, and those decide whether an attachment fits. Measure them on the machine, or send us the measurements of the bucket it runs today.
A midi excavator is often the main machine on a site, trenching, loading and grading in the same day. Buyers usually start with a general purpose bucket, a grading bucket and a quick coupler, then add other tools when the work calls for them.
Quick coupler brackets at this weight
In our model tables, the attachments listed for the Komatsu PC78MR-6 at its weight are built with these brackets. Each code opens the models that list it.
- Measure the diameter of both bucket pins.
- Measure the distance between the pin centres.
- Measure the inside width between the stick ears.
- If the machine runs a quick coupler, note its make and type.
What these terms mean:
How to choose an attachment for the job:
Send me the spec sheet for my machine
Pick a bucket line and we email you its spec sheet, with the sizes we build for the PC78MR-6.
Send this answer to a colleague or dealer
Komatsu PC78MR-6: GP - general purpose digging bucket (GP-95)
Sizes are matched to the published operating weight of the PC78MR-6.
- Weight Class
- Midi Excavator (6–10 t)
- Operating Weight
- 8,270 kg
- Family-owned group, founded in 1996
- More than 50,000 attachments delivered
- Built in our own factory in Poland
Operating weight as published by Komatsu, retrieved 2026-09-10. Source
Komatsu PC78MR-6: machine data
- Operating weight
- 8,270 kg
- Engine power
- 40.5 kW
- Maximum digging depth
- 4,160 mm
- Bucket breakout force
- 61.3 kN
- Arm crowd force
- 41.5 kN
- Auxiliary circuit flow
- 123 l/min
- Max reach
- 6,750 mmmaker's document (komatsu.eu)
- Arm length
- 1,650–2,250 mmmaker's document (komatsu.eu)
- Main pump flow
- 160 l/minmaker's document (komatsu.eu)
- Bucket capacity
- 0.09–0.34 m³maker's document (komatsu.eu)
- Bucket width
- 350–825 mmmaker's document (komatsu.eu)
- Lift capacity
- 4,725 kgmaker's document (komatsu.eu)
As published by Komatsu, retrieved 2026-09-17. Source
- Pin diameter
- 50 mmSource: Tuff Buckets, DiggerCity, Equipment Plus, and Long Reach Boom.
A guide only. Measure the pins before you order.
What the PC78MR-6 figures mean for its attachments
- Its auxiliary circuit delivers 123 l/min. A breaker, auger, tilt rotator or other hydraulic tool states the oil flow it needs, so choose one whose range includes this figure.
- The main pump delivers up to 160 l/min at 264.8 bar. That is the pump output of the whole machine, not the flow an attachment gets.
- It digs down to 4,160 mm. That is the deepest trench it can open.
- Its maximum reach is 6,750 mm.
- Komatsu offers arms from 1,650 to 2,250 mm. A longer arm reaches further, a shorter one handles a heavier bucket.
- Komatsu lists buckets from 350 to 825 mm wide for this machine.Our sizes in that range: GP - general purpose digging bucket (GP-95); GPO - GP bucket with perforated bottom (GPO-95); GPL - general purpose digging bucket (GPL-95); GPLO - GPL bucket with perforated bottom (GPLO-95); BDP mini - clay digging bucket for mini-excavator (BDP-90); PDP mini - skeleton BDP stone bucket (PDP-90); DS mini - Scandinavian deep digging bucket for mini-excavator (DS-90); KS mini - cable bucket for mini-excavator (KS-100); KSV mini - Scandinavian profile cable V bucket for mini-excavator (KSV-100); CB mini - hydraulic clamp bucket for mini-excavator (CBR-90)
- Komatsu lists bucket capacities from 0.09 to 0.34 m³.
- Bucket breakout force is 61.3 kN and arm crowd force 41.5 kN. That is the force a bucket or ripper works with at the tooth.
- Komatsu gives a lifting capacity of 4,725 kg. Check a heavy grab or hammer, plus its load, against the full load chart.
- Engine power is 40.5 kW.
Figures as published by Komatsu in its own documents.
How the PC78MR-6 compares with its neighbours
The nearest models by weight, with the difference to the PC78MR-6 in parentheses where both makers publish the figure.
| Model | Operating weight | Max dig depth | Main pump flow | Auxiliary flow |
|---|---|---|---|---|
| PC78MR-6 | 8.27 t | 4,160 mm | 160 l/min | 123 l/min |
| Komatsu PC88MR-6 | 8.27 t | 4,750 mm (+590) | 165 l/min (+5) | 145 l/min (+22) |
| Komatsu PC88MR-8 | 8.1 t (-0.17 t) | 4,620 mm (+460) | 160 l/min | not published |
| JCB 85Z-2 | 8.3 t (+0.03 t) | 3,840 mm (-320) | 158.4 l/min (-1.6) | 100 l/min (-23) |
Figures as each maker publishes them. A difference is shown only where both machines have a published value.
PC78MR-6: build years and variants
Build years: 2004–2006
Variants
- PC78MR-6 (2004–2006)
Years and variants as listed in the LECTURA Specs database.
PC78MR-6: what the brochure names
Features Komatsu names in its own brochure for the PC78MR-6. Some of them may be optional, so check the machine's spec before you order.
- Boom swing, for digging along walls and around obstacles.
- A load-sensing hydraulic system.
From Komatsu's published brochure. We keep the source document on file.
Other Komatsu models of a similar weight
Other makes of a similar weight
Operating weight within 2 t of the Komatsu PC78MR-6.
Other Komatsu models with the same coupler brackets
Our model tables give these machines the same quick coupler brackets.
Why buy from the factory
- Cutting, machining, welding and painting on one site, our own factory in Poland, EU
- More than 50,000 attachments delivered since 2008
- A record for every serial number, so the spare parts match your attachment
Need Custom Specifications?
We can manufacture attachments to your exact pin spacing and requirements for Komatsu PC78MR-6.
Questions about the PC78MR-6
- What bucket width fits the PC78MR-6?
- Komatsu lists buckets from 350 to 825 mm wide for it. Pick a width in that range.
- Can the PC78MR-6 run a hydraulic attachment?
- Yes, if the tool's rated oil flow range includes the 123 l/min of its auxiliary circuit.
For publishers: cite or embed this table
Cite this table as https://sieruta.com/en/fit/komatsu/komatsu-pc78mr-6, figures as of 2026-09-10.
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Machine makes and model names belong to their owners. Sieruta is not affiliated with them. We use the names only to show which machines we offer attachments for, by operating weight.