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The Caproni group 2 gear pump is the European built value line in the size that suits most Australian work. Twelve displacements from 4.5 to 36 cm3 per revolution, on either the European 4 bolt DIN mount with a 1:8 taper or the American SAE A 2 bolt mount with a keyed or splined shaft, in BSPP threaded, square flange or UN O-ring porting. This page is the clockwise 4 bolt DIN build. The factory builds the clockwise pumps on the DIN and SAE A mounts and the anti-clockwise pumps on the KHD, IHC and German mounts - every build is on its own page, all linked below.
Pick your options below and the exact factory part number appears on screen. Every choice in the dropdowns is a real catalogued part number with a firm price - nothing here is a guess.
Applications
- Tipping trailers, truck bodies and hoist circuits
- Log splitters and firewood processors
- PTO driven pumps on tractors and trucks
- Electric and engine driven power packs
- Replacement pumps on European built machinery
- Crane and tailgate circuits
Ways to buy this gear pump
- Off the shelf: every combination in the dropdowns below is a real part number we can order today
- Seal kits and shaft seals: full reseal kits for this frame are on the seal kit listing linked further down - starting part number GR205-SK
- Anti-clockwise (left hand rotation): KHD 2 bolt, IHC 2 bolt and German 4 bolt mounts, nine displacements from 4.5 to 25cc, flange ports - each mount is on its own page, linked below.
- Tandem and multiple pumps, port adaptors and non standard shafts: all available from the factory. Call 1300 146 737 or use the enquiry form and we will code and price it
- Identifying an old pump? These part numbers have been sold in Australia under the Boden or GRH names as well - the codes are the same. Send us a photo of the body and we will confirm it
Other builds in this range
This page is the clockwise 4 bolt DIN build. The same Caproni group 2 pump in the other factory mount, shaft and rotation configurations:
Caproni Group 2 - SAE A Mount, 5/8 Inch Keyed ShaftCaproni Group 2 - SAE A Mount, 5/8 Inch 9 Tooth Splined ShaftCaproni Group 2 - SAE A Mount, 17mm 10 Tooth Splined ShaftCaproni Group 2 - SAE A Mount, 3/4 Inch 11 Tooth Splined Shaft (UNO Ports)Caproni Group 2 - SAE A Mount, 3/4 Inch Keyed Shaft (UNO Ports)Caproni Group 2 - KHD 2 Bolt Mount, 1:5 Tapered ShaftCaproni Group 2 - KHD 2 Bolt Mount, 16.5mm 9 Tooth Splined ShaftCaproni Group 2 - IHC 2 Bolt Mount, 1:5 Tapered ShaftCaproni Group 2 - German 4 Bolt Mount, 1:5 Tapered ShaftCaproni Group 2 - German 4 Bolt Mount, 16.5mm 9 Tooth Splined ShaftPick your pump
| Displacement | Ports | Part Number | Weight |
|---|---|---|---|
| 4.50 cc/rev | BSPP Ports | 20C4.5X687G | 3.30 kg |
| 4.50 cc/rev | Diamond Flange Ports | 20C4.5X006 | 3.30 kg |
| 6.30 cc/rev | BSPP Ports | 20C6.3X687G | 3.40 kg |
| 6.30 cc/rev | Diamond Flange Ports | 20C6.3X006 | 3.40 kg |
| 8.20 cc/rev | BSPP Ports | 20C8.2X687G | 3.40 kg |
| 8.20 cc/rev | Diamond Flange Ports | 20C8.2X006 | 3.40 kg |
| 11.3 cc/rev | BSPP Ports | 20C11X016G | 3.70 kg |
| 11.3 cc/rev | Diamond Flange Ports | 20C11X006 | 3.70 kg |
| 14.0 cc/rev | BSPP Ports | 20C14X016G | 4.20 kg |
| 14.0 cc/rev | Diamond Flange Ports | 20C14X006 | 4.20 kg |
| 16.0 cc/rev | BSPP Ports | 20C16X016G | 4.20 kg |
| 16.0 cc/rev | Diamond Flange Ports | 20C16X006 | 4.20 kg |
| 19.0 cc/rev | BSPP Ports | 20C19X016G | 4.30 kg |
| 19.0 cc/rev | Diamond Flange Ports | 20C19X006 | 4.30 kg |
| 22.0 cc/rev | BSPP Ports | 20C22X016G | 4.50 kg |
| 22.0 cc/rev | Diamond Flange Ports | 20C22X006 | 4.50 kg |
| 25.0 cc/rev | BSPP Ports | 20C25X016HG | 4.90 kg |
| 25.0 cc/rev | Diamond Flange Ports | 20C25X006H | 4.90 kg |
| 28.0 cc/rev | BSPP Ports | 20C28X016HG | 5.00 kg |
| 28.0 cc/rev | Diamond Flange Ports | 20C28X006H | 5.00 kg |
| 32.0 cc/rev | BSPP Ports | 20C32X016HG | 5.30 kg |
| 32.0 cc/rev | Diamond Flange Ports | 20C32X006H | 5.30 kg |
| 36.0 cc/rev | BSPP Ports | 20C36X016HG | 5.40 kg |
| 36.0 cc/rev | Diamond Flange Ports | 20C36X006H | 5.40 kg |
Standard Supply Configuration
- Bare pump - no fittings, adaptors, couplings or bell housing fitted
- Mounting flange and drive shaft exactly as selected in the dropdowns above
- Port sizes per the performance table for your displacement
- Nitrile (NBR) seals to 22cc; HNBR seals as standard on the 25 to 36cc frames - viton is a factory option
- Standard blank rear cover unless a relief cover has been quoted separately
- Rotation as stated in the title - a gear pump cannot be reversed in the field
How to Order - Part Number Breakdown
Every part number on this listing decodes the same way. Worked example:
20C 11 X016G
| Position | What it means |
|---|---|
| 20C | Series - Caproni group 2 pump. C = clockwise rotation, A = anti-clockwise |
| 11 | Displacement in cc - 4.5, 6.3, 8.2, 11.3, 14, 16, 19, 22, 25, 28, 32, 36 |
| X016G | Mount, shaft and port series - X687G and X016G = 4 bolt DIN 1:8 taper with BSPP ports. X006 = 4 bolt DIN 1:8 taper with square flange ports. X030G = SAE A 5/8 inch keyed, BSPP. X085G = SAE A 5/8 inch 9 tooth spline, BSPP. X104 = SAE A 5/8 inch 9 tooth spline, flange. X554G = SAE A 17.04mm 10 tooth spline, BSPP. X550H = SAE A 3/4 inch 11 tooth spline, UN O-ring. X853H = SAE A 3/4 inch keyed, UN O-ring |
| H | An H in the series block marks the 25 to 36cc frames, which are built with HNBR seals as standard |
The 25cc and larger frames are built with HNBR (hydrogenated nitrile) seals as standard because they run hotter - that is what the H in the part number is telling you. Change the C to an A for an anti-clockwise pump - those are the KHD, IHC and German 4 bolt builds the factory makes left hand, each on its own page, linked below.
Specifications
| Parameter | Value |
|---|---|
| Brand / Origin | Caproni - made in Europe |
| Type | External gear pump, Group 2 frame |
| Displacement range | 4.50 to 36.0 cm3/rev |
| Mount and shaft options | 4 bolt DIN mount with 1:8 tapered shaft, BSPP or diamond flange ports - all other mounts, shafts and rotations are on their own pages, linked below |
| Rotation | Clockwise, viewed from the shaft end |
| Seals | Nitrile (NBR) standard, viton available to order |
| Fluid | Mineral hydraulic oil, 20 to 100 cSt at working temperature |
| Filtration | 25 micron or better recommended, 10 micron on continuous duty |
| Warranty | 12 months |
General Performance Data
Published factory figures. Maximum continuous pressure and speed both fall as displacement rises - always read the row for the exact part number you are buying.
4 Bolt DIN Mount - 1:8 Tapered Shaft - BSPP Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C4.5X687G | 4.50 | 1/2" | 1/2" | 3,500 | 250 | 3.30 |
| 20C6.3X687G | 6.30 | 1/2" | 1/2" | 3,500 | 250 | 3.40 |
| 20C8.2X687G | 8.20 | 1/2" | 1/2" | 3,500 | 250 | 3.40 |
| 20C11X016G | 11.30 | 3/4" | 1/2" | 3,500 | 250 | 3.60 |
| 20C14X016G | 14.00 | 3/4" | 1/2" | 3,500 | 250 | 3.70 |
| 20C16X016G | 16.00 | 3/4" | 1/2" | 2,500 | 250 | 3.80 |
| 20C19X016G | 19.00 | 3/4" | 1/2" | 2,500 | 200 | 3.90 |
| 20C22X016G | 22.00 | 3/4" | 1/2" | 2,000 | 180 | 4.10 |
| 20C25X016HG | 25.00 | 3/4" | 1/2" | 2,500 | 160 | 4.50 |
| 20C28X016HG | 28.00 | 1" | 3/4" | 2,500 | 130 | 4.60 |
| 20C32X016HG | 32.00 | 1" | 3/4" | 2,000 | 120 | 4.90 |
| 20C36X016HG | 36.00 | 1" | 3/4" | 2,000 | 100 | 5.00 |
4 Bolt DIN Mount - 1:8 Tapered Shaft - Diamond Flange Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C4.5X006 | 4.50 | 1/2" | 1/2" | 3,500 | 250 | 3.30 |
| 20C6.3X006 | 6.30 | 1/2" | 1/2" | 3,500 | 250 | 3.40 |
| 20C8.2X006 | 8.20 | 1/2" | 1/2" | 3,500 | 250 | 3.40 |
| 20C11X006 | 11.30 | 3/4" | 1/2" | 3,500 | 250 | 3.60 |
| 20C14X006 | 14.00 | 3/4" | 1/2" | 3,500 | 250 | 3.70 |
| 20C16X006 | 16.00 | 3/4" | 1/2" | 2,500 | 250 | 3.80 |
| 20C19X006 | 19.00 | 3/4" | 1/2" | 2,500 | 200 | 3.90 |
| 20C22X006 | 22.00 | 3/4" | 1/2" | 2,000 | 180 | 4.10 |
| 20C25X006H | 25.00 | 3/4" | 1/2" | 2,500 | 160 | 4.50 |
| 20C28X006H | 28.00 | 1" | 3/4" | 2,500 | 130 | 4.60 |
| 20C32X006H | 32.00 | 1" | 3/4" | 2,000 | 120 | 4.90 |
| 20C36X006H | 36.00 | 1" | 3/4" | 2,000 | 100 | 5.00 |
SAE A 2 Bolt Mount - 17.04mm 10 Tooth Splined Shaft - BSPP Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C8.2X554G | 8.20 | 1/2" | 1/2" | 3,500 | 250 | 3.50 |
| 20C11X554G | 11.30 | 3/4" | 1/2" | 3,500 | 250 | 3.70 |
| 20C14X554G | 14.00 | 3/4" | 1/2" | 3,500 | 250 | 3.80 |
| 20C16X554G | 16.00 | 3/4" | 1/2" | 2,500 | 250 | 3.90 |
| 20C19X554G | 19.00 | 3/4" | 1/2" | 2,500 | 200 | 4.00 |
| 20C22X554G | 22.00 | 3/4" | 1/2" | 2,000 | 180 | 4.20 |
| 20C25X554HG | 25.00 | 3/4" | 1/2" | 2,500 | 160 | 4.60 |
| 20C28X554HG | 28.00 | 1" | 3/4" | 2,500 | 130 | 4.70 |
| 20C32X554HG | 32.00 | 1" | 3/4" | 2,000 | 120 | 5.00 |
SAE A 2 Bolt Mount - 5/8 inch 9 Tooth Splined Shaft - BSPP Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C4.5X085G | 4.50 | 1/2" | 1/2" | 3,500 | 250 | 3.40 |
| 20C6.3X085G | 6.30 | 1/2" | 1/2" | 3,500 | 250 | 3.50 |
| 20C8.2X085G | 8.20 | 1/2" | 1/2" | 3,500 | 250 | 3.50 |
| 20C11X085G | 11.30 | 3/4" | 1/2" | 3,500 | 250 | 3.70 |
| 20C14X085G | 14.00 | 3/4" | 1/2" | 3,500 | 250 | 3.80 |
| 20C16X085G | 16.00 | 3/4" | 1/2" | 2,500 | 250 | 3.90 |
| 20C19X085G | 19.00 | 3/4" | 1/2" | 2,500 | 200 | 4.00 |
| 20C22X085G | 22.00 | 3/4" | 1/2" | 2,000 | 180 | 4.20 |
| 20C25X085HG | 25.00 | 3/4" | 1/2" | 2,500 | 160 | 4.60 |
| 20C28X085HG | 28.00 | 1" | 3/4" | 2,500 | 130 | 4.70 |
| 20C32X085HG | 32.00 | 1" | 3/4" | 2,000 | 120 | 5.00 |
| 20C36X085HG | 36.00 | 1" | 3/4" | 2,000 | 100 | 5.10 |
SAE A 2 Bolt Mount - 5/8 inch 9 Tooth Splined Shaft - Flange Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) |
|---|---|---|---|---|---|
| 20C4.5X104 | 4.50 | G206 | G205 | 3,500 | 250 |
| 20C6.3X104 | 6.30 | G206 | G205 | 3,500 | 250 |
| 20C8.2X104 | 8.20 | G206 | G205 | 3,500 | 250 |
| 20C11X104 | 11.00 | G206 | G205 | 3,500 | 250 |
| 20C14X104 | 14.00 | G206 | G205 | 3,500 | 250 |
| 20C16X104 | 16.00 | G206 | G205 | 2,500 | 250 |
| 20C19X104 | 19.00 | G206 | G205 | 2,500 | 200 |
| 20C22X104 | 22.00 | G206 | G205 | 2,000 | 180 |
| 20C25X104H | 25.00 | G206 | G205 | 2,500 | 160 |
SAE A 2 Bolt Mount - 5/8 inch Keyed Shaft - BSPP Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C4.5X030G | 4.50 | 1/2" | 1/2" | 3,500 | 250 | 3.40 |
| 20C6.3X030G | 6.30 | 1/2" | 1/2" | 3,500 | 250 | 3.50 |
| 20C8.2X030G | 8.20 | 1/2" | 1/2" | 3,500 | 250 | 3.50 |
| 20C11X030G | 11.30 | 3/4" | 1/2" | 3,500 | 250 | 3.70 |
| 20C14X030G | 14.00 | 3/4" | 1/2" | 3,500 | 250 | 3.80 |
| 20C16X030G | 16.00 | 3/4" | 1/2" | 2,500 | 250 | 3.90 |
| 20C19X030G | 19.00 | 3/4" | 1/2" | 2,500 | 200 | 4.00 |
| 20C22X030G | 22.00 | 3/4" | 1/2" | 2,000 | 180 | 4.20 |
| 20C25X030HG | 25.00 | 3/4" | 1/2" | 2,500 | 160 | 4.60 |
| 20C28X030HG | 28.00 | 1" | 3/4" | 2,500 | 130 | 4.70 |
| 20C32X030HG | 32.00 | 1" | 3/4" | 2,000 | 120 | 5.00 |
| 20C36X030HG | 36.00 | 1" | 3/4" | 2,000 | 100 | 5.10 |
SAE A 2 Bolt Mount - 3/4 inch 11 Tooth Splined Shaft - UN O-Ring Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C14X550HDU | 14.00 | 1.1/16" | 7/8" | 3,500 | 250 | 4.20 |
| 20C16X550HDU | 16.00 | 1.1/16" | 7/8" | 3,500 | 250 | 4.20 |
| 20C19X550HDU | 19.00 | 1.1/16" | 7/8" | 3,500 | 230 | 4.30 |
| 20C22X550HDU | 22.00 | 1.1/16" | 7/8" | 3,500 | 200 | 4.50 |
| 20C25X550HDU | 25.00 | 1.1/16" | 7/8" | 3,500 | 200 | 4.90 |
| 20C28X550HDU | 28.00 | 1.5/16" | 1.1/16" | 2,500 | 170 | 5.00 |
| 20C32X550HDU | 32.00 | 1.5/16" | 1.1/16" | 2,500 | 150 | 5.30 |
| 20C36X550HDU | 36.00 | 1.5/16" | 1.1/16" | 2,500 | 120 | 5.40 |
SAE A 2 Bolt Mount - 3/4 inch Keyed Shaft - UN O-Ring Ports
| Part # | CC | Suction Port | Pressure Port | Max Cont. Speed (RPM) | Max Cont. Pressure (Bar) | Weight (KG) |
|---|---|---|---|---|---|---|
| 20C14X853HDU | 14.00 | 1.1/16" | 7/8" | 3,500 | 250 | 4.20 |
| 20C16X853HDU | 16.00 | 1.1/16" | 7/8" | 3,500 | 250 | 4.20 |
| 20C19X853HDU | 19.00 | 1.1/16" | 7/8" | 3,500 | 230 | 4.30 |
| 20C22X853HDU | 22.00 | 1.1/16" | 7/8" | 3,500 | 200 | 4.50 |
| 20C25X853HDU | 25.00 | 1.1/16" | 7/8" | 3,500 | 200 | 4.90 |
| 20C28X853HDU | 28.00 | 1.5/16" | 1.1/16" | 2,500 | 170 | 5.00 |
| 20C32X853HDU | 32.00 | 1.5/16" | 1.1/16" | 2,500 | 150 | 5.30 |
| 20C36X853HDU | 36.00 | 1.5/16" | 1.1/16" | 2,500 | 120 | 5.40 |
How to choose
- Work out the flow you need first. Litres per minute = displacement in cc x rpm divided by 1000, then take off 5 to 10 percent for slip. A 1,450 rpm electric motor on a 16.8cc pump gives roughly 23 L/min.
- Then check the pressure. Continuous pressure falls as displacement rises on every gear pump frame. Read the performance table for the exact displacement you are choosing, not the headline figure.
- Match the mount and shaft to the machine. 4 bolt DIN with a 1:8 taper is the European standard. SAE 2 bolt with a keyed or splined shaft is the American standard and is what most Australian bell housings, gearboxes and couplings expect.
- Confirm rotation from the shaft end. Gear pumps cannot be reversed in the field. Look at the shaft coming towards you and note which way it turns.
- Check the power available. kW = flow in L/min x pressure in bar divided by 600, then divide by about 0.85 for efficiency. There is no point specifying a pump the engine or motor cannot turn.
- Not sure? Call 1300 146 737 with your drive speed, the flow you want, the pressure and a photo of the old pump. We do this every day.
Official Datasheets
Full factory technical data for the whole Caproni gear pump range - dimensions, performance tables, shaft and flange drawings, order code charts and seal kit references.
📄 Download the Caproni Gear Pump Range Datasheet (PDF)Technicians Advice
- Read the pressure column, not the headline. Continuous pressure on this frame falls from 250 bar at 4.5cc to 100 bar at 36cc, and maximum speed falls from 3,500 to 2,000 rpm. The performance tables below are per displacement for exactly that reason.
- Seals change with size. The 25cc and larger frames come with HNBR seals as standard because they run hotter. If you are ordering a seal kit for one of those, say so - a plain nitrile kit will not last in it.
- Size the relief for full pump flow. A 36cc pump at 1,450 rpm is about 50 litres a minute. The relief has to pass all of it at the set pressure or the pressure will climb straight past the setting.
- Match the mount properly. 4 bolt DIN with a 1:8 taper is the European standard and needs a taper hub. SAE A 2 bolt with a keyed or splined shaft is the American standard and is what most Australian gearboxes, bell housings and couplings expect. They are not interchangeable.
- UN O-ring ports are not BSPP. The 3/4 inch shaft pumps come with UN O-ring boss ports. Do not wind a BSPP fitting into them - you will damage the port and it will still leak.
- Cavitation looks like wear. Frosted, pitted gear faces and a rattling pump mean air, not age. Fix the suction before you fit a new pump or you will buy two.
Warranty and Service
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.
Complete your setup
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 - no separate relief valve or manifold needed.
Add an Integrated Relief Valve Rear CoverSeal kits, the other frame sizes in this range, the same group from our other brand, and the gear motor that shares this frame:
Buy the Seal Kit for This PumpCaproni Group 1 Gear PumpCaproni Group 3 Gear PumpCompare - Vivoil Group 2 Gear PumpMatching Gear Motor - Same GroupBrowse All Gear PumpsFitting out a fleet or buying several? Call us and we will work out freight and lead time on the whole lot.
Shipping and Freight Information
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.
- Standard parcels: 2 to 7 business days
- Heavy freight: 3 to 8 business days
- Orders placed before 12 Midday AEST ship same business day where stock is available
Why Buy From Us
- 20+ years of hydraulics expertise
- Australian owned and operated, Gold Coast QLD
- ABN 92 969 264 674
- Secure checkout: Visa, Mastercard, PayPal, Zip Pay, Direct Deposit
- Tax invoices supplied with every purchase
- Phone 07 5563 1982 or 1300 1 HOSES
- Email sales@mhfgc.com.au
Out of Stock Policy
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.
Need help choosing? Call 1300 146 737 or email sales@mhfgc.com.au — real technicians, real answers.
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Hydraulic Online is an Australian-owned e-commerce business specialising in hydraulic components for agriculture, construction, mining, marine, transport, and industrial applications.
With over two decades of hands-on industry experience, we supply field-proven products that are built to perform in real working environments — not just to look good on a spec sheet.
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Whether you’re replacing a worn orbital motor, building a power pack, or just need a hose assembly made to a specific length, we have what you need in stock and ready to ship.
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We carry products we stand behind, at prices that reflect our volume buying — not inflated margins.
ABN: 92 969 264 674 | Phone: 07 5563 1982 or 1300 146 737 | Email: sales@mhfgc.com.au
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