HGP-2A Hydraulic Gear Pump

HGP-2A Hydraulic Gear Pump — Models, Specifications and Selection

The HGP-2A hydraulic gear pump is a compact single-section external gear pump series for hydraulic power units and matched auxiliary circuits. Olive Branch Hydraulics supports quotation and configuration checks for customers sourcing an HGP2A gear pump or a replacement hydraulic oil pump. The supplied photographs show four-bolt mounting flanges, keyed shafts and side flange ports. They do not identify the displacement or full ordering code of an individual pump.

Select a pump by displacement, operating pressure, drive speed, rotation and interface dimensions. A matching series name or similar appearance alone does not establish interchangeability. Send your existing pump nameplate, full model code, dimensions and operating requirements for a matched quotation.

Key Features & Benefits

• Compact external gear design: suitable for systems requiring a small, fixed-displacement hydraulic pump.
• Model-specific displacement selection: reference sizes range from 2 to 12 cc/rev.
• Interface checks: shaft, pilot, bolt spacing and inlet/outlet connections are reviewed before replacement selection.
• Rotation selection: clockwise or counter-clockwise configurations must be specified from the shaft-end view.
• Project support: OEM/ODM and sample-based configuration requests can be discussed with Olive Branch Hydraulics.

Technical Specifications & Performance Parameters

The following table is transcribed from the HYDROMAX HGP-2A manufacturer catalogue as a series selection reference. It is not a certified test report for the photographed Olive Branch products. Confirm the ordered unit's performance and configuration with the quotation and approved datasheet. All reference models list 1800 rpm as rated speed. Maximum speed is an upper catalogue limit, not a recommendation to operate continuously at maximum pressure and speed together.

Model reference	Displacement (cc/rev)	Operating / maximum pressure (kgf/cm²)	Minimum–maximum speed (rpm)	Theoretical flow at 1800 rpm (L/min)
HGP-2A-2	2	210 / 250	1000–5000	3.6
HGP-2A-25	2.5	210 / 250	850–5000	4.5
HGP-2A-3	3	210 / 250	850–5000	5.4
HGP-2A-4	4	210 / 250	800–4500	7.2
HGP-2A-5	5	210 / 250	700–3500	9.0
HGP-2A-6	6	210 / 250	700–3500	10.8
HGP-2A-8	7.5	210 / 250	600–3000	13.5
HGP-2A-9	9	210 / 250	550–2500	16.2
HGP-2A-11	10.5	210 / 250	500–2000	18.9
HGP-2A-12	12	175 / 210	500–2000	21.6

Theoretical flow equals displacement multiplied by speed and divided by 1000. Actual delivered flow depends on volumetric efficiency and operating conditions. HGP-2A-25 means 2.5 cc/rev, not 25 cc/rev. HGP-2A-8 is listed at 7.5 cc/rev and HGP-2A-11 at 10.5 cc/rev. The catalogue identifies the 2.5 cc and 5 cc versions as non-regular products for customized service; availability must be confirmed.

Pressure units: 210 kgf/cm² ≈ 20.59 MPa / 205.9 bar; 250 kgf/cm² ≈ 24.52 MPa / 245.2 bar; 175 kgf/cm² ≈ 17.16 MPa / 171.6 bar. The 12 cc version has lower listed pressure limits. Do not apply the highest series pressure rating to every model.

Model Codes and Ordering References

Common search and inquiry references include HGP-2A-F2R, HGP-2A-F3R, HGP-2A-F4R, HGP-2A-F6R, HGP-2A-F8R, HGP-2A-F9R, HGP-2A-F11R and HGP-2A-F12R. Left-rotation inquiries may use F2L, F3L, F4L, F6L, F8L, F9L, F11L or F12L. These shortened references do not specify every shaft and port detail.

Code element	Meaning
HGP-2A	Series reference
F / L mounting	Flange / foot mounting
R / L rotation	Clockwise / counter-clockwise; viewed from shaft end
X / Y / Z / W shaft	Straight keyed / spline / taper / tang shaft
4BJ	JIS four-bolt mounting flange
F1 ports	Flange connection
G1 / G2 ports	G 3/8 / G 1/2
P1 / P2 ports	PT 3/8 / PT 1/2

For example, HGP-2A-F-6-R-X1-4BJ-F1 describes a catalogue-style 6 cc, clockwise, keyed-shaft configuration with four-bolt mounting and flange ports. This is an ordering-code illustration, not the identified part number of the photographed unit. No machine-specific OEM material number has been verified for these photographs.

Mounting, Shaft and Port Dimensions

Manufacturer reference drawings include a 63.5 × 63.5 mm mounting-hole pattern, Ø50.8 mm pilot with +0/−0.05 mm tolerance, and an X1 keyed shaft of Ø12.5 mm with +0/−0.02 mm tolerance. The X1 drawing lists a 4 × 16 mm Woodruff key. F1 flange ports show a Ø14.5 mm passage, M6 fixing threads and 35 mm bolt spacing. Other catalogue shaft options include Y1: 12 teeth, 16/32 DP, 30°; and Z1: 1:8 taper with M8 × 1.25 end thread. These are drawing references; measure the actual pump and obtain an approved interface drawing before ordering.

Applications and Equipment Compatibility

Selection application	Required checks
Compact hydraulic power units	Motor speed and power, flow, pressure and coupling
Hydraulic clamping and fixtures	Actuator demand, cycle time and pressure setting
Small lifting and handling systems	Load, required flow, safety circuit and drive arrangement
Machine-tool auxiliary circuits	Existing pump code, rotation, shaft, mounting and ports

These are engineering selection applications, not a confirmed vehicle-fitment list. No specific excavator, forklift, tractor or loader model is guaranteed compatible from the HGP-2A series name alone. Brand references describe the catalogue series used for selection and do not identify Olive Branch products as genuine HYDROMAX units.

Why Choose Olive Branch Hydraulics?

We help buyers turn a pump inquiry into a defined configuration: full code, displacement, direction, shaft, mounting and connections. Share samples or drawings for OEM/ODM discussions and sample-order planning. Performance requirements, inspection scope and supply details should be agreed for the ordered product. Oil temperature, viscosity, filtration, seal material, efficiency, noise and service-life claims require a confirmed product datasheet or test evidence.

Frequently Asked Questions

Is HGP-2A-F8R an 8 cc pump?

The referenced manufacturer catalogue lists model -8 at 7.5 cc/rev. Confirm the actual displacement of the supplied version.

Is HGP-2A-F11R an 11 cc pump?

The referenced catalogue lists model -11 at 10.5 cc/rev. Do not infer exact displacement solely from the model suffix.

Can every HGP-2A model use the highest pressure?

No. The catalogue gives the 12 cc model lower limits, and actual ordered-product ratings need confirmation. Maximum pressure must not be treated as a universal continuous-duty rating.

What should I send for a replacement quotation?

Send the full nameplate code, original material number if available, shaft diameter and length, key or spline details, pilot diameter, bolt spacing, oil-port dimensions, rotation, working pressure and drive speed.

Can you confirm compatibility with my equipment?

Compatibility is assessed from the original pump specification and installation requirements. A series name or photograph alone is insufficient to confirm direct replacement.

Request an HGP-2A Gear Pump Quote

Contact Olive Branch Hydraulics with your HGP-2A model reference and technical requirements. We will review the requested displacement, rotation and interfaces and discuss a suitable supply configuration for your hydraulic system.

Part Number Search and Replacement Enquiries

Published HGP-2A pump listings use codes such as HGP-2A-F6R as the product / ordering reference. A manufacturer catalogue also gives HGP-2A-F-12-R-X-4BJ as an ordering-code example. Customers may search the latter as HGP-2A-F12R-X-4BJ; confirm the original nameplate spelling and complete port specification before ordering.

If you are searching for an HGP-2A-F2R, HGP-2A-F3R, HGP-2A-F4R, HGP-2A-F6R, HGP-2A-F8R, HGP-2A-F9R, HGP-2A-F11R or HGP-2A-F12R replacement gear pump, include the shaft, mounting and oil-port details with your enquiry. These are pump model / ordering codes; no separate equipment OEM numeric material number was found for the photographed unit.

HGP-2A Hydraulic Gear Pump — Models, Specifications and Selection

The HGP-2A hydraulic gear pump is a compact single-section external gear pump series for hydraulic power units and matched auxiliary circuits. Olive Branch Hydraulics supports quotation and configuration checks for customers sourcing an HGP2A gear pump or a replacement hydraulic oil pump. The supplied photographs show four-bolt mounting flanges, keyed shafts and side flange ports. They do not identify the displacement or full ordering code of an individual pump.

Select a pump by displacement, operating pressure, drive speed, rotation and interface dimensions. A matching series name or similar appearance alone does not establish interchangeability. Send your existing pump nameplate, full model code, dimensions and operating requirements for a matched quotation.

Key Features & Benefits

• Compact external gear design: suitable for systems requiring a small, fixed-displacement hydraulic pump.
• Model-specific displacement selection: reference sizes range from 2 to 12 cc/rev.
• Interface checks: shaft, pilot, bolt spacing and inlet/outlet connections are reviewed before replacement selection.
• Rotation selection: clockwise or counter-clockwise configurations must be specified from the shaft-end view.
• Project support: OEM/ODM and sample-based configuration requests can be discussed with Olive Branch Hydraulics.

Technical Specifications & Performance Parameters

The following table is transcribed from the HYDROMAX HGP-2A manufacturer catalogue as a series selection reference. It is not a certified test report for the photographed Olive Branch products. Confirm the ordered unit's performance and configuration with the quotation and approved datasheet. All reference models list 1800 rpm as rated speed. Maximum speed is an upper catalogue limit, not a recommendation to operate continuously at maximum pressure and speed together.

Model reference	Displacement (cc/rev)	Operating / maximum pressure (kgf/cm²)	Minimum–maximum speed (rpm)	Theoretical flow at 1800 rpm (L/min)
HGP-2A-2	2	210 / 250	1000–5000	3.6
HGP-2A-25	2.5	210 / 250	850–5000	4.5
HGP-2A-3	3	210 / 250	850–5000	5.4
HGP-2A-4	4	210 / 250	800–4500	7.2
HGP-2A-5	5	210 / 250	700–3500	9.0
HGP-2A-6	6	210 / 250	700–3500	10.8
HGP-2A-8	7.5	210 / 250	600–3000	13.5
HGP-2A-9	9	210 / 250	550–2500	16.2
HGP-2A-11	10.5	210 / 250	500–2000	18.9
HGP-2A-12	12	175 / 210	500–2000	21.6

Theoretical flow equals displacement multiplied by speed and divided by 1000. Actual delivered flow depends on volumetric efficiency and operating conditions. HGP-2A-25 means 2.5 cc/rev, not 25 cc/rev. HGP-2A-8 is listed at 7.5 cc/rev and HGP-2A-11 at 10.5 cc/rev. The catalogue identifies the 2.5 cc and 5 cc versions as non-regular products for customized service; availability must be confirmed.

Pressure units: 210 kgf/cm² ≈ 20.59 MPa / 205.9 bar; 250 kgf/cm² ≈ 24.52 MPa / 245.2 bar; 175 kgf/cm² ≈ 17.16 MPa / 171.6 bar. The 12 cc version has lower listed pressure limits. Do not apply the highest series pressure rating to every model.

Model Codes and Ordering References

Common search and inquiry references include HGP-2A-F2R, HGP-2A-F3R, HGP-2A-F4R, HGP-2A-F6R, HGP-2A-F8R, HGP-2A-F9R, HGP-2A-F11R and HGP-2A-F12R. Left-rotation inquiries may use F2L, F3L, F4L, F6L, F8L, F9L, F11L or F12L. These shortened references do not specify every shaft and port detail.

Code element	Meaning
HGP-2A	Series reference
F / L mounting	Flange / foot mounting
R / L rotation	Clockwise / counter-clockwise; viewed from shaft end
X / Y / Z / W shaft	Straight keyed / spline / taper / tang shaft
4BJ	JIS four-bolt mounting flange
F1 ports	Flange connection
G1 / G2 ports	G 3/8 / G 1/2
P1 / P2 ports	PT 3/8 / PT 1/2

For example, HGP-2A-F-6-R-X1-4BJ-F1 describes a catalogue-style 6 cc, clockwise, keyed-shaft configuration with four-bolt mounting and flange ports. This is an ordering-code illustration, not the identified part number of the photographed unit. No machine-specific OEM material number has been verified for these photographs.

Mounting, Shaft and Port Dimensions

Manufacturer reference drawings include a 63.5 × 63.5 mm mounting-hole pattern, Ø50.8 mm pilot with +0/−0.05 mm tolerance, and an X1 keyed shaft of Ø12.5 mm with +0/−0.02 mm tolerance. The X1 drawing lists a 4 × 16 mm Woodruff key. F1 flange ports show a Ø14.5 mm passage, M6 fixing threads and 35 mm bolt spacing. Other catalogue shaft options include Y1: 12 teeth, 16/32 DP, 30°; and Z1: 1:8 taper with M8 × 1.25 end thread. These are drawing references; measure the actual pump and obtain an approved interface drawing before ordering.

Applications and Equipment Compatibility

Selection application	Required checks
Compact hydraulic power units	Motor speed and power, flow, pressure and coupling
Hydraulic clamping and fixtures	Actuator demand, cycle time and pressure setting
Small lifting and handling systems	Load, required flow, safety circuit and drive arrangement
Machine-tool auxiliary circuits	Existing pump code, rotation, shaft, mounting and ports

These are engineering selection applications, not a confirmed vehicle-fitment list. No specific excavator, forklift, tractor or loader model is guaranteed compatible from the HGP-2A series name alone. Brand references describe the catalogue series used for selection and do not identify Olive Branch products as genuine HYDROMAX units.

Why Choose Olive Branch Hydraulics?

We help buyers turn a pump inquiry into a defined configuration: full code, displacement, direction, shaft, mounting and connections. Share samples or drawings for OEM/ODM discussions and sample-order planning. Performance requirements, inspection scope and supply details should be agreed for the ordered product. Oil temperature, viscosity, filtration, seal material, efficiency, noise and service-life claims require a confirmed product datasheet or test evidence.

Frequently Asked Questions

Is HGP-2A-F8R an 8 cc pump?

The referenced manufacturer catalogue lists model -8 at 7.5 cc/rev. Confirm the actual displacement of the supplied version.

Is HGP-2A-F11R an 11 cc pump?

The referenced catalogue lists model -11 at 10.5 cc/rev. Do not infer exact displacement solely from the model suffix.

Can every HGP-2A model use the highest pressure?

No. The catalogue gives the 12 cc model lower limits, and actual ordered-product ratings need confirmation. Maximum pressure must not be treated as a universal continuous-duty rating.

What should I send for a replacement quotation?

Send the full nameplate code, original material number if available, shaft diameter and length, key or spline details, pilot diameter, bolt spacing, oil-port dimensions, rotation, working pressure and drive speed.

Can you confirm compatibility with my equipment?

Compatibility is assessed from the original pump specification and installation requirements. A series name or photograph alone is insufficient to confirm direct replacement.

Request an HGP-2A Gear Pump Quote

Contact Olive Branch Hydraulics with your HGP-2A model reference and technical requirements. We will review the requested displacement, rotation and interfaces and discuss a suitable supply configuration for your hydraulic system.