Attachments for the Caterpillar 320 GC weight range
- Bucket line
- DB - heavy duty digging bucket600–1,500 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 320 GC
Each size below has a catalogue row rated for a carrier of 22,000 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 320 GC.
On a narrow screen the table scrolls sideways.
Buckets
Tools
| Attachment | Sizes | Heaped capacity ISO 7451 [dm³] | Width [mm] | Weight [kg] |
|---|---|---|---|---|
Non-bucket attachments | ||||
| TH - hydraulic thumb for excavator | TH-26 | 780 | 520 | |
| AC - excavator asphalt cutters | AC-30 | 165 | ||
| MR - heavy duty excavator multi-ripper | MR-22 | 1,300 | 546 | |
| RIP - heavy duty ripper | Ripper-D | 403 | ||
| DuoRIP - double ripper for root extraction | Duo-Ripper-30 | 500 | 565 | |
| GRB - excavator grading beam | GRB maxi · 6 variants | 2,500–3,000 | 357–680 | |
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-S70, QC-U-S70 | 270 | ||
| CW - CW-System compatible quick-couplerCW-System | CW-30, CW-30 S, CW-40, CW-40 S, CW-U-30, CW-U-30 S, CW-U-40, CW-U-40 S | 220–240 | ||
| QC-HS / QC-MS - MS-System compatible quick-couplerMS system | QC-HS-21, QC-MS-21, QC-U-HS-21 | 310 | ||
| QC-PG - pin-grabber quick-coupler for factory bracketsPin-grabber | QC-PG-80, QC-ML-M-65, QC-ML-M-70, QC-U-PG-80 | 132–400 |
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 Caterpillar 320 GC 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.
At this weight the choice is mostly about the material. A general purpose bucket suits soil and gravel, a reinforced bucket with thicker wear parts suits mixed ground and broken rock, and the quick coupler on the machine sets the bracket every attachment needs.
Quick coupler brackets at this weight
In our model tables, the attachments listed for the Caterpillar 320 GC 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 320 GC.
Send this answer to a colleague or dealer
Caterpillar 320 GC: DBF - flat-top digging bucket for quick coupler (DBF-230)
Sizes are matched to the published operating weight of the 320 GC.
- Weight Class
- Large Excavator (10–30 t)
- Operating Weight
- 22,000 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
Caterpillar 320 GC: machine data
- Max dig depth
- 6,620 mmmaker's document via s7d2.scene7.com
- Max reach
- 9,760 mmmaker's document via s7d2.scene7.com
- Max dump height
- 6,590 mmmaker's document via s7d2.scene7.com
- Arm length
- 2,900 mmmaker's document via s7d2.scene7.com
- Main pump flow
- 442 l/minmaker's document via s7d2.scene7.com
- Bucket capacity
- 0.44–1.59 m³maker's document via s7d2.scene7.com
- Bucket width
- 600–1,350 mmmaker's document via s7d2.scene7.com
- Lift capacity
- 5,800 kgmaker's document via s7d2.scene7.com
- Quick coupler
- Cat Pin Grabber Couplermaker's document via s7d2.scene7.com
- Transport width
- 3,170 mmmaker's document via s7d2.scene7.com
What the 320 GC figures mean for its attachments
- The main pump delivers up to 442 l/min at 350 bar. That is the pump output of the whole machine, not the flow an attachment gets.
- Caterpillar lists this quick coupler for it: Cat Pin Grabber Coupler. The bracket on every attachment has to match the coupler.
- It digs down to 6,620 mm. That is the deepest trench it can open.
- Its maximum reach is 9,760 mm.
- It dumps at up to 6,590 mm, so a truck or skip side has to sit below that height.
- Its arm is 2,900 mm long.
- Caterpillar lists buckets from 600 to 1,350 mm wide for this machine.Our sizes in that range: DB - heavy duty digging bucket (DB-230); DBF - flat-top digging bucket for quick coupler (DBF-230); RDBF - flat-top skeleton DBF bucket on rods (RDBF-230); DSX - Nordic heavy duty digging bucket (DS-HD-250); CB - heavy duty hydraulic clamp bucket (CBR-260)
- Caterpillar lists bucket capacities from 0.44 to 1.59 m³.
- Bucket breakout force is 150 kN and arm crowd force 101 kN. That is the force a bucket or ripper works with at the tooth.
- Caterpillar gives a lifting capacity of 5,800 kg. Check a heavy grab or hammer, plus its load, against the full load chart.
- For transport it measures 9,530 x 3,170 x 3,160 mm (length, width, height).
Figures as published by Caterpillar in its own documents.
How the 320 GC compares with its neighbours
The nearest models by weight, with the difference to the 320 GC in parentheses where both makers publish the figure.
| Model | Operating weight | Max dig depth | Main pump flow |
|---|---|---|---|
| 320 GC | 22 t | 6,620 mm | 442 l/min |
| Caterpillar M323 | 21.7 t (-0.3 t) | not published | 306 l/min (-136) |
| Caterpillar M322 | 21.52 t (-0.48 t) | 6,650 mm (+30) | 360 l/min (-82) |
| Atlas 220W | 22 t | 6,300 mm (-320) | 380 l/min (-62) |
Figures as each maker publishes them. A difference is shown only where both machines have a published value.
320 GC: what the brochure names
Features Caterpillar names in its own brochure for the 320 GC. Some of them may be optional, so check the machine's spec before you order.
- An engine that meets EU Stage V.
- Work modes you select from the cab.
From Caterpillar's published brochure. We keep the source document on file.
Other Caterpillar models of a similar weight
Other makes of a similar weight
Operating weight within 2 t of the Caterpillar 320 GC.
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 320 GC.
Questions about the 320 GC
- What bucket width fits the 320 GC?
- Caterpillar lists buckets from 600 to 1,350 mm wide for it. Pick a width in that range.
- Which quick coupler is installed on your 320 GC?
- Caterpillar lists this coupler for it: Cat Pin Grabber Coupler. Order attachments with the matching bracket.
For publishers: cite or embed this table
Cite this table as https://sieruta.com/en/fit/caterpillar/caterpillar-320-gc, figures as of 2026-09-13.
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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.