
The SAE A keyed build of the Caproni group 2: a 2 bolt SAE A flange with a 5/8 inch parallel keyed shaft - the American-pattern fit on skid steers, trenchers and a large share of Australian mobile gear. Bulgarian-made Caproni internals with a fifty-year pedigree, 12 displacements from 4.5 to 36 cm3/rev, up to 250 bar continuous on most sizes, clockwise rotation.
Pick a displacement below and the exact factory part number and price appear on screen. Every choice in the dropdown is a real catalogued part number we can order today. Other shafts, ports and rotations on this frame are factory order - call 1300 146 737 or use the enquiry form and we will code and price it.
| Displacement | Part Number | Weight |
|---|---|---|
| 4.50 cc/rev | 20C4.5X030G | 3.30 kg |
| 6.30 cc/rev | 20C6.3X030G | 3.40 kg |
| 8.20 cc/rev | 20C8.2X030G | 3.40 kg |
| 11.3 cc/rev | 20C11X030G | 3.70 kg |
| 14.0 cc/rev | 20C14X030G | 4.20 kg |
| 16.0 cc/rev | 20C16X030G | 4.20 kg |
| 19.0 cc/rev | 20C19X030G | 4.30 kg |
| 22.0 cc/rev | 20C22X030G | 4.50 kg |
| 25.0 cc/rev | 20C25X030HG | 4.90 kg |
| 28.0 cc/rev | 20C28X030HG | 5.00 kg |
| 32.0 cc/rev | 20C32X030HG | 5.30 kg |
| 36.0 cc/rev | 20C36X030HG | 5.40 kg |
| Parameter | Value |
|---|---|
| Brand / Origin | Caproni - made in Bulgaria |
| Type | External gear pump, Group 2 frame |
| Displacement range | 4.5 to 36 cm3/rev |
| Pressure | Up to 250 bar continuous on most sizes - falls as displacement rises |
| Seals | NBR standard; HNBR factory-fitted on 25cc and up |
| Fluid | Mineral hydraulic oil, 20 to 100 cSt at working temperature |
| Filtration | 25 micron or better, 10 micron on continuous duty |
| Warranty | 12 months |
Full performance tables, the part number breakdown chart and the factory datasheet live on our main Caproni Group 2 page:
Caproni Group 2 - Full Performance Data and How to OrderFit the coupling, never hammer it. A parallel keyed shaft takes the coupling with a light interference or a slip fit and a grub screw on the flat - hammer blows land on the front bearing.
The suction line is the number one killer. Gear pumps do not suck well. Full-bore inlet, short run, no elbow directly on the inlet port. Noisy cold, quiet warm = marginal suction.
It needs relief protection. Fixed displacement does not know how to stop. Set the relief below the pump rating against a real load, or order the integrated relief rear cover below.
Want the pump to protect its own circuit? A rear cover with an integrated relief valve is available for this frame in three pressure bands.
Add an Integrated Relief Valve Rear CoverSeal kits and the other builds of this Caproni group 2 pump:
Buy the Seal Kit for This PumpCaproni Group 2 - 4 Bolt DIN MountCaproni Group 2 - SAE A Mount, 9 Tooth Splined ShaftCaproni Group 2 - SAE A Mount, 10 Tooth Splined ShaftCaproni Group 2 - SAE A Mount, 11 Tooth Spline, UNO PortsCaproni Group 2 - SAE A Mount, 3/4 Keyed Shaft, UNO PortsFitting out a fleet or buying several? Call us and we will work out freight and lead time on the whole lot.
12-month warranty on every pump. If you are identifying an existing pump, photograph every number cast or stamped on the body and the shaft end and send it through with your enquiry - gear pump part numbers are long and one letter changes the shaft or the rotation.
We ship Australia-wide. Orders are dispatched from our supply network in Melbourne, Brisbane and Perth, so your parts leave from the warehouse closest to you on express freight. Because we sell solid steel components, freight costs reflect real weight and real distance. We do not hide freight costs in inflated product prices. What you see is what you pay.
It is our intention to maintain active stock on every listed item at all times. On rare occasions a size may be temporarily unavailable. If this occurs you will be notified immediately and offered the choice of a full refund or a short wait for incoming stock, typically 3 to 14 days.




