HGP-1A Hydraulic Gear Pump

HGP-1A Hydraulic Gear Pump — Compact Aluminum Pump Supply

The HGP-1A hydraulic gear pump is a compact single-section external gear pump with an aluminum alloy housing. Olive Branch Hydraulics supplies HGP-1A configurations for small hydraulic power units and auxiliary circuits where flow demand, pressure, drive speed and installation dimensions match the selected pump.

When sourcing an HGP-1A gear pump or a replacement small hydraulic oil pump, send the full existing model code, nameplate photo, rotation direction and installation drawing. The HGP-1A series name alone does not establish interchangeability. Quotations can specify the displacement, shaft, mounting flange and inlet/outlet connections required for your project.

Key Features & Benefits

• Compact single gear pump: designed for installations where a small pump envelope is required.
• Aluminum alloy housing: a compact housing construction shown in the supplied product documentation.
• Model-specific displacement: choose the pump size for the required flow rather than using one performance rating for the entire series.
• Defined rotation: R is clockwise and L is counterclockwise when viewed from the shaft end. Confirm the ordered direction; do not assume a standard pump is reversible.
• Configuration matching: confirm the complete shaft, flange and port arrangement before replacing an existing pump.
• OEM project support: provide a drawing or sample for evaluation of custom shaft, port, mounting and branding requirements.

Technical Specifications

The values below are selection references transcribed from the supplied HGP-1A performance sheet. They are not test results or universal ratings for all manufacturers using the HGP-1A name. Obtain the confirmed specification for the ordered pump. Peak pressure is not a continuous working pressure, and maximum pressure and maximum speed must not be assumed to be simultaneous operating conditions.

Parameter	Specification	Notes
Pump type	Single-section external gear pump	Hydraulic oil pump
Housing	Aluminum alloy	As shown in the supplied documentation
Published displacement options	1, 2, 3, 4, 5, 6, 7.8 cc/rev	Additional sizes require availability and specification confirmation
Rated speed reference	1500 rpm	From the supplied performance sheet; confirm the ordered configuration
Rated pressure reference	18 MPa (180 bar) for F1–F5; 16 MPa (160 bar) for F6/F8	Model-specific supplied-sheet values
Peak pressure reference	21 MPa (210 bar) for F1–F5; 18 MPa (180 bar) for F6/F8	Momentary peak; duty limits require confirmation
Rotation	R: CW / L: CCW	Viewed from the shaft end
Shaft shown	12 mm keyed shaft; 4 mm key width	Shown drawing only; not a guarantee for all variants
Mounting shown	2-bolt: 82.5 mm hole spacing and 50.8 mm pilot; 4-bolt: 64 × 64 mm pattern and 30 mm pilot	Verify tolerances and flange version against the actual pump drawing
Port reference	PT 3/8 in inlet/outlet on F1–F6; F8 inlet PT 1/2 in and outlet PT 3/8 in	From supplied performance sheet; thread and sealing must be confirmed
Efficiency	Confirm against the ordered pump test data	No unsupported numerical efficiency guarantee
Oil, viscosity and temperature	Confirm with the selected pump specification	Seal material and operating conditions must be specified

Model References, Displacement and Speed

These are series/model references, not verified equipment-maker OEM material numbers. A complete order reference also requires rotation, shaft, flange and ports. The theoretical flow is calculated at 1500 rpm as displacement × speed ÷ 1000; delivered flow depends on operating conditions and volumetric efficiency.

Model reference	Displacement (cc/rev)	Theoretical flow at 1500 rpm (L/min)	Maximum speed reference (rpm)	Minimum speed reference (rpm)
HGP-1A-F1	1	1.50	4500	1000
HGP-1A-F2	2	3.00	4500	600
HGP-1A-F3	3	4.50	4500	600
HGP-1A-F4	4	6.00	4000	600
HGP-1A-F5	5	7.50	3200	600
HGP-1A-F6	6	9.00	3200	600
HGP-1A-F8	7.8	11.70	3200	600

Dimensions of the Illustrated Configuration

A and B refer to the supplied outline drawing. Dimensions are in mm and apply only to the illustrated configuration. Confirm the actual assembly length, shaft extension, pilot and hole spacing before ordering.

Model reference	Dimension A (mm)	Dimension B (mm)
HGP-1A-F1	77	36.5
HGP-1A-F2	80.5	40.25
HGP-1A-F3	86	43
HGP-1A-F4	88	44
HGP-1A-F5	92	46
HGP-1A-F6	96	48
HGP-1A-F8	102	51

Applications and Machine Fitment

An HGP-1A compact hydraulic pump may be evaluated for the applications below. No specific tractor, forklift, loader or other vehicle model has been verified from the supplied information.

Application	Potential circuit	Information required for selection
Compact hydraulic power units	Small cylinder and auxiliary circuits	Required flow, pressure, motor power and operating duty
Industrial machinery	Matched machine-tool, band-saw or automation hydraulic circuits	Existing pump code, flange/shaft dimensions, ports and hydraulic schematic
Material handling equipment	Auxiliary lifting or positioning circuits	Machine model, serial number, OEM pump number and installation drawing
Agricultural / construction equipment	Matched low-flow auxiliary circuits	Exact machine model, serial number and full pump identification; not a universal main-pump replacement

Why Choose Us

Olive Branch Hydraulics supports hydraulic component sourcing with model identification, configuration comparison and project-specific quotations. Send your technical requirements so the supplied pump, drawings and agreed inspection requirements can be clearly recorded before production or shipment.

• Drawing or sample-based evaluation for replacement projects.
• Configuration review covering rotation, displacement, shaft, mounting and ports.
• OEM branding and packaging requirements can be discussed with your quotation.
• English-language communication for distributors, equipment builders and maintenance buyers.

FAQ

1. What displacement options are listed for this HGP-1A pump?

The supplied performance sheet lists 1, 2, 3, 4, 5, 6 and 7.8 cc/rev configurations. If you require 0.5, 0.8, 1.1, 1.6, 2.1, 2.6, 3.2, 4.3 or 5.8 cc/rev, request a confirmed model code and datasheet for that version before ordering. Similar HGP-1A names can be used with different ratings or coding conventions.

2. Is every HGP-1A pump rated for 4500 rpm and 21 MPa?

No. The supplied sheet lists lower speed limits for larger displacements and lower pressure references for F6 and F8. Use the specification for the exact ordered configuration and verify the permitted operating combination.

3. Are HGP1A-05-R and similar codes verified OEM material numbers?

No verified equipment-maker cross-reference was supplied for these shortened codes. Use the pump model as a selection reference and provide the original OEM material number, machine serial number and full pump code for a replacement enquiry.

4. Which machine models can use the HGP-1A hydraulic gear pump?

Fitment must be checked individually. Send the machine make, model and serial number together with the existing pump nameplate, OEM part number, mounting dimensions, shaft specification and ports. Application categories alone do not prove that a pump fits a particular vehicle.

5. What is needed for a quotation?

Provide the full model or nameplate photo, displacement, quantity, rotation, shaft dimensions, flange pattern, port threads, required operating pressure and speed. Include a drawing or sample information if custom manufacture or replacement matching is required.

Call To Action

Looking for an HGP-1A aluminum gear pump, a mini hydraulic pump or a small hydraulic power unit pump? Contact Olive Branch Hydraulics with your model, installation drawing and operating requirements to request a configuration-specific quotation.

Published Part Number and Ordering Code Searches

HGP-1A pumps are commonly listed for sale using the complete pump model as the part number. Published catalogue search references include HGP-1A-F3R-2B, HGP-1A-F4R, HGP-1A-F5R, HGP-1A-F6R and HGP-1A-F8R-X-2B. Quote the full code when asking for an HGP-1A replacement hydraulic gear pump; displacement alone does not identify the mounting, shaft and port configuration.

These alphanumeric references are pump ordering / catalogue codes. No separate equipment-maker numeric material number was located for the photographed pump. Supply the existing code and installation dimensions for matching.

HGP-1A Hydraulic Gear Pump — Compact Aluminum Pump Supply

The HGP-1A hydraulic gear pump is a compact single-section external gear pump with an aluminum alloy housing. Olive Branch Hydraulics supplies HGP-1A configurations for small hydraulic power units and auxiliary circuits where flow demand, pressure, drive speed and installation dimensions match the selected pump.

When sourcing an HGP-1A gear pump or a replacement small hydraulic oil pump, send the full existing model code, nameplate photo, rotation direction and installation drawing. The HGP-1A series name alone does not establish interchangeability. Quotations can specify the displacement, shaft, mounting flange and inlet/outlet connections required for your project.

Key Features & Benefits

• Compact single gear pump: designed for installations where a small pump envelope is required.
• Aluminum alloy housing: a compact housing construction shown in the supplied product documentation.
• Model-specific displacement: choose the pump size for the required flow rather than using one performance rating for the entire series.
• Defined rotation: R is clockwise and L is counterclockwise when viewed from the shaft end. Confirm the ordered direction; do not assume a standard pump is reversible.
• Configuration matching: confirm the complete shaft, flange and port arrangement before replacing an existing pump.
• OEM project support: provide a drawing or sample for evaluation of custom shaft, port, mounting and branding requirements.

Technical Specifications

The values below are selection references transcribed from the supplied HGP-1A performance sheet. They are not test results or universal ratings for all manufacturers using the HGP-1A name. Obtain the confirmed specification for the ordered pump. Peak pressure is not a continuous working pressure, and maximum pressure and maximum speed must not be assumed to be simultaneous operating conditions.

Parameter	Specification	Notes
Pump type	Single-section external gear pump	Hydraulic oil pump
Housing	Aluminum alloy	As shown in the supplied documentation
Published displacement options	1, 2, 3, 4, 5, 6, 7.8 cc/rev	Additional sizes require availability and specification confirmation
Rated speed reference	1500 rpm	From the supplied performance sheet; confirm the ordered configuration
Rated pressure reference	18 MPa (180 bar) for F1–F5; 16 MPa (160 bar) for F6/F8	Model-specific supplied-sheet values
Peak pressure reference	21 MPa (210 bar) for F1–F5; 18 MPa (180 bar) for F6/F8	Momentary peak; duty limits require confirmation
Rotation	R: CW / L: CCW	Viewed from the shaft end
Shaft shown	12 mm keyed shaft; 4 mm key width	Shown drawing only; not a guarantee for all variants
Mounting shown	2-bolt: 82.5 mm hole spacing and 50.8 mm pilot; 4-bolt: 64 × 64 mm pattern and 30 mm pilot	Verify tolerances and flange version against the actual pump drawing
Port reference	PT 3/8 in inlet/outlet on F1–F6; F8 inlet PT 1/2 in and outlet PT 3/8 in	From supplied performance sheet; thread and sealing must be confirmed
Efficiency	Confirm against the ordered pump test data	No unsupported numerical efficiency guarantee
Oil, viscosity and temperature	Confirm with the selected pump specification	Seal material and operating conditions must be specified

Model References, Displacement and Speed

These are series/model references, not verified equipment-maker OEM material numbers. A complete order reference also requires rotation, shaft, flange and ports. The theoretical flow is calculated at 1500 rpm as displacement × speed ÷ 1000; delivered flow depends on operating conditions and volumetric efficiency.

Model reference	Displacement (cc/rev)	Theoretical flow at 1500 rpm (L/min)	Maximum speed reference (rpm)	Minimum speed reference (rpm)
HGP-1A-F1	1	1.50	4500	1000
HGP-1A-F2	2	3.00	4500	600
HGP-1A-F3	3	4.50	4500	600
HGP-1A-F4	4	6.00	4000	600
HGP-1A-F5	5	7.50	3200	600
HGP-1A-F6	6	9.00	3200	600
HGP-1A-F8	7.8	11.70	3200	600

Dimensions of the Illustrated Configuration

A and B refer to the supplied outline drawing. Dimensions are in mm and apply only to the illustrated configuration. Confirm the actual assembly length, shaft extension, pilot and hole spacing before ordering.

Model reference	Dimension A (mm)	Dimension B (mm)
HGP-1A-F1	77	36.5
HGP-1A-F2	80.5	40.25
HGP-1A-F3	86	43
HGP-1A-F4	88	44
HGP-1A-F5	92	46
HGP-1A-F6	96	48
HGP-1A-F8	102	51

Applications and Machine Fitment

An HGP-1A compact hydraulic pump may be evaluated for the applications below. No specific tractor, forklift, loader or other vehicle model has been verified from the supplied information.

Application	Potential circuit	Information required for selection
Compact hydraulic power units	Small cylinder and auxiliary circuits	Required flow, pressure, motor power and operating duty
Industrial machinery	Matched machine-tool, band-saw or automation hydraulic circuits	Existing pump code, flange/shaft dimensions, ports and hydraulic schematic
Material handling equipment	Auxiliary lifting or positioning circuits	Machine model, serial number, OEM pump number and installation drawing
Agricultural / construction equipment	Matched low-flow auxiliary circuits	Exact machine model, serial number and full pump identification; not a universal main-pump replacement

Why Choose Us

Olive Branch Hydraulics supports hydraulic component sourcing with model identification, configuration comparison and project-specific quotations. Send your technical requirements so the supplied pump, drawings and agreed inspection requirements can be clearly recorded before production or shipment.

• Drawing or sample-based evaluation for replacement projects.
• Configuration review covering rotation, displacement, shaft, mounting and ports.
• OEM branding and packaging requirements can be discussed with your quotation.
• English-language communication for distributors, equipment builders and maintenance buyers.

FAQ

1. What displacement options are listed for this HGP-1A pump?

The supplied performance sheet lists 1, 2, 3, 4, 5, 6 and 7.8 cc/rev configurations. If you require 0.5, 0.8, 1.1, 1.6, 2.1, 2.6, 3.2, 4.3 or 5.8 cc/rev, request a confirmed model code and datasheet for that version before ordering. Similar HGP-1A names can be used with different ratings or coding conventions.

2. Is every HGP-1A pump rated for 4500 rpm and 21 MPa?

No. The supplied sheet lists lower speed limits for larger displacements and lower pressure references for F6 and F8. Use the specification for the exact ordered configuration and verify the permitted operating combination.

3. Are HGP1A-05-R and similar codes verified OEM material numbers?

No verified equipment-maker cross-reference was supplied for these shortened codes. Use the pump model as a selection reference and provide the original OEM material number, machine serial number and full pump code for a replacement enquiry.

4. Which machine models can use the HGP-1A hydraulic gear pump?

Fitment must be checked individually. Send the machine make, model and serial number together with the existing pump nameplate, OEM part number, mounting dimensions, shaft specification and ports. Application categories alone do not prove that a pump fits a particular vehicle.

5. What is needed for a quotation?

Provide the full model or nameplate photo, displacement, quantity, rotation, shaft dimensions, flange pattern, port threads, required operating pressure and speed. Include a drawing or sample information if custom manufacture or replacement matching is required.

Call To Action

Looking for an HGP-1A aluminum gear pump, a mini hydraulic pump or a small hydraulic power unit pump? Contact Olive Branch Hydraulics with your model, installation drawing and operating requirements to request a configuration-specific quotation.