Buckets and attachments for the Komatsu WB91R-5
- Bucket line
- GP - general purpose digging bucket300–1000 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.
Catalogue sizes for the WB91R-5
Each size below has a catalogue row rated for an excavator of about 7.2 t. That is the class whose bucket breakout force matches this backhoe loader. Tell us which sizes you want and we reply with an offer.
On a narrow screen the table scrolls sideways.
| Attachment | Sizes | Capacity [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
| GRB - excavator grading beam | GRB-MINI · 4 variants, GRBH-MINI · 2 width variants, GRB midi · 6 variants | 1,000–2,500 | 91–530 | |
| GP - general purpose digging bucket | GP-95 · 6 width variants | 100–377 SAE | 300–1,000 | 86–160 |
| GBH - hydraulic tilt ditching bucket for mini-excavator | GBH-90 · 3 width variants | 275–334 SAE | 1,500–1,800 | 267–297 |
| GPO - GP bucket with perforated bottom | GPO-95 · 2 width variants | 154–183 SAE | 800–1,000 | 130–148 |
| GPL - general purpose digging bucket | GPL-75 · 6 width variants | 71–321 SAE | 300–1,000 | 67–152 |
| GBP - rigid grading & ditching bucket, Italian profile | GBP-75 · 4 width variants | 297–392 SAE | 1,400–1,800 | 160–200 |
| GBPH - hydraulic tilting grading & ditching bucket | GBPH-75 · 4 width variants | 249–345 SAE | 1,200–1,600 | 223–264 |
| BDP mini - clay digging bucket for mini-excavator | BDP-90 · 2 width variants | 88–120 SAE | 400–500 | 126–141 |
| PDP mini - skeleton BDP stone bucket | PDP-75 · 3 width variants | 229–350 SAE | 700–1,000 | 128–166 |
| RIP mini - ripper shank for mini-excavator | Ripper-10 | 98 | ||
| AC mini - asphalt cutter for mini-excavator | AC-10 | 67 |
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 product that carries the CE mark.
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The attachments buyers in your market ask for first, sized for the WB91R-5.
The front end of this backhoe loader
- Front loader bucketAsk us for this end
- Quick couplerAsk us for this end
Each family shows its candidate models by operating-weight range.
Non-bucket attachments
- GRB - excavator grading beam
GRB-MINI · 4 variants, GRBH-MINI · 2 width variants, GRB midi · 6 variants
Standard mini-ex buckets set No. 1
- GP - general purpose digging bucket
GP-95 · 6 width variants
- GBH - hydraulic tilt ditching bucket for mini-excavator
GBH-90 · 3 width variants
- GPO - GP bucket with perforated bottom
GPO-95 · 2 width variants
Standard mini-ex buckets set No. 2
- GPL - general purpose digging bucket
GPL-75 · 6 width variants
- GBP - rigid grading & ditching bucket, Italian profile
GBP-75 · 4 width variants
- GBPH - hydraulic tilting grading & ditching bucket
GBPH-75 · 4 width variants
Dutch mini-ex buckets set No. 3
- BDP mini - clay digging bucket for mini-excavator
BDP-90 · 2 width variants
- PDP mini - skeleton BDP stone bucket
PDP-75 · 3 width variants
Bucket sets for this machine
Sets of one bucket profile that include buckets listed for the Komatsu WB91R-5. Each set lists the buckets that match the machine's operating weight.
- German-profile set
Buckets in the set for this weight: GP, GBH
- Italian-profile set
Buckets in the set for this weight: GPL, GBP, GBPH
- Dutch-profile set
Buckets in the set for this weight: BDP, PDP
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 WB91R-5 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 backhoe loader digs at the rear and loads at the front, so the rear bucket is chosen for trenching and the loader bucket for moving material. The rear quick coupler, where the machine has one, sets the bracket every rear attachment needs; the pin and stick checks below still decide the fit.
Quick coupler brackets at this weight
In our model tables, the attachments listed for the Komatsu WB91R-5 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 WB91R-5.
Send this answer to a colleague or dealer
Komatsu WB91R-5: GP - general purpose digging bucket (GP-95)
Sizes are matched to the bucket breakout force of the WB91R-5, which is about what a 7.2 t excavator gives.
- Weight Class
- Midi (6–12 t)
- Operating Weight
- 6,750 – 6,800 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 2026-10-05. Source
WB91R-5 at a glance
| Figure | Value | Source |
|---|---|---|
| Backhoe end | ||
| Max dig depth | 4,840 mm | maker's document (komatsu.eu) |
| Max reach | 5,586 mm | maker's document (komatsu.eu) |
| Max dump height | 4,050 mm | maker's document (komatsu.eu) |
| Main pump flow | 140 l/min | maker's document (komatsu.eu) |
| Transport width | 2,200 mm | maker's document (komatsu.eu) |
| Loader end | ||
| Loader bucket capacity | 0.8 m³ | maker's document (komatsu.eu) |
| Loader dump height | 2,723 mm | maker's document (komatsu.eu) |
| Loader lift capacity | 3,000 kg | maker's document (komatsu.eu) |
| Loader breakout force | 47.1 kN | maker's document (komatsu.eu) |
Only figures the maker publishes for this model. Where a figure is missing, no value is shown.
What the WB91R-5 figures mean for its attachments
- The main pump delivers up to 140 l/min at 207 bar. That is the pump output of the whole machine, not the flow an attachment gets.
- It digs down to 4,840 mm. That is the deepest trench it can open.
- Its maximum reach is 5,586 mm.
- It dumps at up to 4,050 mm, so a truck or skip side has to sit below that height.
- Its transport width is 2,200 mm.
Figures as published by Komatsu in its own documents.
How the WB91R-5 compares with its neighbours
The nearest models by weight, with the difference to the WB91R-5 in parentheses where both makers publish the figure.
| Model | Operating weight | Max dig depth | Main pump flow |
|---|---|---|---|
| WB91R-5 | 6.75 t | 4,840 mm | 140 l/min |
| Komatsu WB91R-2 | 7.5 t (+0.75 t) | 4,950 mm (+110) | 165 l/min (+25) |
| Komatsu WB93R-5 | 8.07 t (+1.32 t) | 4,977 mm (+137) | 165 l/min (+25) |
| Volvo BL60B | 6.99 t (+0.24 t) | 4,450 mm (-390) | 112 l/min (-28) |
Figures as each maker publishes them. A difference is shown only where both machines have a published value.
Other Komatsu models of a similar weight
More Komatsu backhoe loaders
Other makes of a similar weight
Operating weight within 2 t of the Komatsu WB91R-5.
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 WB91R-5.
For publishers: cite or embed this table
Cite this table as https://sieruta.com/en/fit/komatsu/komatsu-wb91r-5, figures as of 2026-10-05.
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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.