Attachments for the Caterpillar 308 CR (8,390 kg) weight range
- 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 308 CR (8,390 kg)
Each size below has a catalogue row rated for a carrier of 8,390 kg operating weight. Tell us which sizes you want and we reply with an offer.
On a narrow screen the table scrolls sideways.
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.
Message us on WhatsAppPhotos and voice notes are welcome.For publishers: cite or embed this table
Cite this table as https://sieruta.com/en/fit/caterpillar/caterpillar-308-cr-15969855, figures as of 2026-09-13.
Embed this table on your site
Copy the HTML below into your page. It keeps the link back to this page and the date of the figures.
Sizes are matched to the published operating weight of the 308 CR (8,390 kg).
- Weight Class
- Midi Excavator (6–12 t)
- Operating Weight
- 8,390 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 Caterpillar, retrieved 2026-09-13. Source
Start here
The attachments buyers in your market ask for first, sized for the 308 CR (8,390 kg).
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.
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 308 CR (8,390 kg).
Send this answer to a colleague or dealer
Caterpillar 308 CR (8,390 kg): GP - general purpose digging bucket (GP-95)
308 CR (8,390 kg) at a glance
| Figure | Value | Source |
|---|---|---|
| Max dig depth | 4,643 mm | maker's document (s7d2.scene7.com) |
| Max reach | 7,460 mm | maker's document (s7d2.scene7.com) |
| Max dump height | 5,072 mm | maker's document (s7d2.scene7.com) |
| Arm length | 1,820–2,358 mm | maker's document (s7d2.scene7.com) |
| Main pump flow | 167 l/min | maker's document (s7d2.scene7.com) |
| Auxiliary flow | 131 l/min | maker's document (s7d2.scene7.com) |
| Auxiliary pressure | 285 bar | maker's document (s7d2.scene7.com) |
| Lift capacity | 3,749 kg | maker's document (s7d2.scene7.com) |
| Transport width | 2,300 mm | maker's document (s7d2.scene7.com) |
Only figures the maker publishes for this model. Where a figure is missing, no value is shown.
What the 308 CR (8,390 kg) figures mean for its attachments
- Its auxiliary circuit is rated at 131 l/min and 285 bar. 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 167 l/min at 285 bar. That is the pump output of the whole machine, not the flow an attachment gets.
- It digs down to 4,643 mm. That is the deepest trench it can open.
- Its maximum reach is 7,460 mm.
- It dumps at up to 5,072 mm, so a truck or skip side has to sit below that height.
- Caterpillar offers arms from 1,820 to 2,358 mm. A longer arm reaches further, a shorter one handles a heavier bucket.
- Caterpillar gives a lifting capacity of 3,749 kg. Check a heavy grab or hammer, plus its load, against the full load chart.
- For transport it measures 6,574 x 2,300 x 2,541 mm (length, width, height).
Figures as published by Caterpillar in its own documents.
How the 308 CR (8,390 kg) compares with its neighbours
The nearest models by weight, with the difference to the 308 CR (8,390 kg) in parentheses where both makers publish the figure.
| Model | Operating weight | Max dig depth | Main pump flow | Auxiliary flow |
|---|---|---|---|---|
| 308 CR (8,390 kg) | 8.39 t | 4,643 mm | 167 l/min | 131 l/min |
| Caterpillar 308 CR (Fixed Boom) (8,460 kg) | 8.46 t (+0.07 t) | 4,687 mm (+44) | 167 l/min | 131 l/min |
| Caterpillar 307.5 - Tier 4 / Stage V | 8.12 t (-0.27 t) | 4,642 mm (-1) | 167 l/min | 131 l/min |
| Caterpillar 308 CR (Fixed Boom) (8,030 kg) | 8.03 t (-0.36 t) | 4,687 mm (+44) | 167 l/min | 131 l/min |
| Caterpillar 308 CR (9,420 kg) | 9.42 t (+1.03 t) | 4,643 mm | 167 l/min | 131 l/min |
| Kubota KX085-5 | 8.392 t (+0.002 t) | 4,600 mm (-43) | not published | 100 l/min (-31) |
Figures as each maker publishes them. A difference is shown only where both machines have a published value.
308 CR (8,390 kg): what the brochure names
Features Caterpillar names in its own brochure for the 308 CR (8,390 kg). Some of them may be optional, so check the machine's spec before you order.
- Operator protection certified to ROPS and FOPS.
- Telematics for tracking the machine remotely (Product Link).
- Automatic engine idle when the controls are left alone.
- An angle dozer blade.
From Caterpillar's published brochure. We keep the source document on file.
Questions about the 308 CR (8,390 kg)
- Can the 308 CR (8,390 kg) run a hydraulic attachment?
- Yes, if the tool's rated range covers the auxiliary circuit: 131 l/min at 285 bar.
Each family shows its candidate models by operating-weight range.
Non-bucket attachments
- DuoRIP - double ripper for root extraction
Duo-Ripper-12
- GRB - excavator grading beam
GRB-MINI · 4 variants, GRBH-MINI · 2 width variants, GRB midi · 6 variants
Also available
- RC - root cutter
Root cutter-10
- RRB - root rake bucket profile
RRB-90
Other mini-ex attachments
- LR mini - straight land rakes for mini-excavator
LR-10 · 2 width variants
- LRS - short land rakes for mini-excavators
LRS-15
- RIP mini - ripper shank for mini-excavator
Ripper-10
- MR mini - multi-ripper for mini-excavator
MRF 140 · 2 width variants
- AC mini - asphalt cutter for mini-excavator
AC-10
Standard mini-ex buckets set No. 1
- GP - general purpose digging bucket
GP-95 · 6 width variants
- GB - rigid grading & ditching bucket, German profile
GB-90 · 3 width variants
- GBH - hydraulic tilt ditching bucket for mini-excavator
GBH-90 · 3 width variants
- RGP - skeleton rod GP bucket
RGP-95
- SGP - heavy duty skeleton GP bucket
SGP-95
- GPO - GP bucket with perforated bottom
GPO-95 · 2 width variants
Standard mini-ex buckets set No. 2
- GPL - general purpose digging bucket
GPL-95 · 6 width variants
- GBP - rigid grading & ditching bucket, Italian profile
GBP-95 · 3 width variants
- GBPH - hydraulic tilting grading & ditching bucket
GBPH-95 · 3 width variants
- RGPL - skeleton rod GPL bucket
RGPL-95
- GPLO - GPL bucket with perforated bottom
GPLO-95 · 2 width variants
- SGPL - heavy duty skeleton GPL bucket for mini-excavator
SGPL-95
Dutch mini-ex buckets set No. 3
- BDP mini - clay digging bucket for mini-excavator
BDP-90 · 2 width variants
- SB mini - Dutch profile grading & ditching bucket for mini-excavator
SB-90 · 5 width variants
- PDP mini - skeleton BDP stone bucket
PDP-90 · 3 width variants
Nordic mini-ex buckets set No. 4
- DS mini - Scandinavian deep digging bucket for mini-excavator
DS-90 · 4 width variants
- PS mini - Scandinavian universal grading bucket for mini-excavator
PS-120 · 5 width variants
- PSH mini - hydraulic swivelling grading bucket for mini-excavators
PS-120 · 5 width variants
- KS mini - cable bucket for mini-excavator
KS-100 · 3 width variants
- KSV mini - Scandinavian profile cable V bucket for mini-excavator
KSV-100 · 3 width variants
- QC-S - S-System Scandinavian quick-coupler
QC-S45-H, QC-S50, QC-S45-SA, QC-U-S45-H, QC-U-S50
- CW - CW-System compatible quick-coupler
CW-10, CW-20, CW-20 S, CW-U-10, CW-U-20, CW-U-20 S
- QC-HS / QC-MS - MS-System compatible quick-coupler
QC-HS-08, QC-MS-08, QC-U-HS-08
- QC-PG - pin-grabber quick-coupler for factory brackets
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
Bucket sets for this machine
Sets of one bucket profile that include buckets listed for the Caterpillar 308 CR (8,390 kg). Each set lists the buckets that match the machine's operating weight.
- German-profile set
Buckets in the set for this weight: GP, GB, GBH
- Italian-profile set
Buckets in the set for this weight: GPL, GBP, GBPH
- Nordic-profile set
Buckets in the set for this weight: DS, PS, PSH, KS, KSV
- Dutch-profile set
Buckets in the set for this weight: BDP, SB, PDP
Before you order: check the interface
The weight class of the Caterpillar 308 CR (8,390 kg) 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 Caterpillar 308 CR (8,390 kg) 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:
Other makes of a similar weight
Operating weight within 2 t of the Caterpillar 308 CR (8,390 kg).
Other Caterpillar 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 Caterpillar 308 CR (8,390 kg).
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.
Do you sell Caterpillar machines? Machine dealer supply
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.