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Hydraulic Gerotor Pumps
Explore our range of hydraulic gerotor pumps for mobile machinery, agricultural equipment, industrial applications and compact hydraulic systems. Gerotor pumps provide efficient and reliable fluid transfer in selected low- and medium-pressure hydraulic applications.
Choose the correct pump by OEM number, displacement, rotation direction, shaft type, mounting dimensions and port configuration. Our hydraulic gerotor pumps are selected for dependable performance and compatibility with a wide range of machines and systems.
Hydraulic Gerotor Pumps for Mobile and Industrial Applications
Hydraulic gerotor pumps are compact positive-displacement pumps used in hydraulic and lubrication systems where reliable fluid transfer, compact dimensions and efficient operation are required.
HPM Hydraulic supplies replacement gerotor hydraulic pumps for selected mobile, industrial and machinery applications. Products can be identified by OEM number, manufacturer reference and technical pump designation.
What Is a Gerotor Pump?
A gerotor pump uses an inner rotor and an outer rotor with a different number of teeth. As the rotors turn, chambers are formed between them. Their changing volume draws oil into the pump and transfers it to the outlet.
This design provides a compact and efficient pumping mechanism with relatively few moving components.
Where Are Hydraulic Gerotor Pumps Used?
Gerotor pumps can be found in applications such as:
- lubrication systems,
- mobile hydraulic equipment,
- industrial machinery,
- transmission and auxiliary circuits,
- oil circulation systems,
- selected agricultural and construction machinery.
The exact application depends on pump design, displacement, operating speed, pressure rating and fluid specification.
How to Select the Correct Gerotor Pump
A replacement gerotor pump should be selected according to the specification of the original component.
Important information includes:
- OEM or manufacturer reference number,
- pump model,
- displacement,
- operating pressure,
- rotation direction,
- shaft type,
- mounting dimensions,
- port size and position.
OEM Number and Reference
The OEM number or manufacturer reference is usually the best starting point when identifying a gerotor pump. This is especially important because pumps with similar external dimensions may have different internal specifications.
Displacement
Pump displacement determines the theoretical volume of fluid transferred during each revolution. The replacement pump should match the hydraulic or lubrication requirements of the original system.
Rotation Direction
The direction of rotation must be compatible with the machine drive. Incorrect rotation can prevent the pump from operating correctly.
Replacement Gerotor Hydraulic Pumps
When replacing a gerotor pump, do not rely only on external appearance. Compare the complete technical specification and mechanical interface.
Before ordering, prepare:
- machine manufacturer and model,
- pump manufacturer,
- OEM number,
- pump reference,
- photos of the original pump,
- shaft and port dimensions if available.
Common Symptoms of Gerotor Pump Wear
Depending on the application, pump wear may cause:
- reduced oil flow,
- lower system performance,
- increased operating noise,
- loss of pressure,
- overheating,
- insufficient lubrication or oil circulation.
Other system problems can produce similar symptoms, so filters, oil level, suction lines and related components should also be inspected before replacing the pump.
Gerotor Pumps from HPM Hydraulic
HPM Hydraulic supplies hydraulic gerotor pumps and related hydraulic components for selected machinery and industrial applications.
If you are unsure which gerotor pump is required, provide the original pump reference, machine model and clear photographs of the existing component. This information can help identify a compatible replacement.
Related Hydraulic Components
For hydraulic system maintenance and pump repair, see our pump repair components and hydraulic seal kits.
For other pump technologies and operating ranges, browse the complete hydraulic pumps category.
FAQ – Hydraulic Gerotor Pumps
What is a gerotor pump?
A gerotor pump is a positive-displacement pump that uses an inner and outer rotor to transfer hydraulic or lubricating oil.
What are gerotor pumps used for?
They are commonly used in lubrication, oil circulation and selected hydraulic systems where compact construction and reliable fluid transfer are required.
How do I identify the correct gerotor pump?
Use the OEM number, manufacturer reference, displacement, rotation direction, shaft type and mounting dimensions.
Can two similar-looking gerotor pumps be interchangeable?
Not necessarily. Internal displacement, rotation direction, shaft design and port configuration may differ even when the pumps look similar.