Hydraulic Pump Part-Number Matching Guide for Equipment Parts Buyers
Ordering a hydraulic pump should never begin with price alone.
For construction-equipment importers, distributors, repair workshops and fleet operators, the first challenge is confirming exactly which pump is installed on the machine. Two hydraulic pumps may belong to the same series and look almost identical, but differ in displacement, rotation direction, shaft design, mounting flange, oil-port configuration, regulator settings or electronic controls.
These differences can make a seemingly similar pump incompatible.
A wrong hydraulic pump can cause installation delays, additional freight, machine downtime and expensive return procedures. In more serious cases, installing an incorrectly configured pump may affect pressure, flow, hydraulic response or other components in the machine’s hydraulic system.
This hydraulic pump part-number matching guide explains what information buyers should collect, how to read a pump nameplate and how TerraParts Global verifies hydraulic pump compatibility before quotation and shipment.
Why Hydraulic Pump Identification Is More Complicated Than It Looks
A construction machine may have several numbers associated with its hydraulic pump:
- Equipment manufacturer’s OEM part number
- Hydraulic pump manufacturer’s model code
- Complete pump assembly number
- Pump series designation
- Regulator or controller number
- Internal component number
- Casting number
- Serial number
- Production or date code
- Distributor’s reference number
These numbers do not necessarily identify the same thing.
A number cast into the pump housing may only identify the housing and not the complete pump assembly. Similarly, a number printed on a regulator may identify the regulator rather than the main pump.
This is why searching one visible number online can produce several apparently suitable—but potentially incorrect—results.
Professional hydraulic pump identification requires combining the number with machine and technical information.
The Most Important Rule: Find the Pump Nameplate
The pump nameplate is usually the best starting point.
Depending on the manufacturer, the nameplate may include:
- Manufacturer name
- Pump series
- Complete model code
- Pump assembly number
- Serial number
- Displacement
- Rotation direction
- Production code
- Manufacturing location
- Additional configuration codes
The full model code is important because it can define the specific configuration of the unit. Official Danfoss technical documentation, for example, states that the complete model code defines the specific unit and should be used when ordering service parts.
Do not submit only part of the code if the complete line is visible.
A buyer searching for a replacement hydraulic pump may send a shortened series such as K3V112, but the complete nameplate may contain additional letters and numbers describing the tandem configuration, shaft, rotation, regulator and other specifications.
Those missing characters can determine whether the replacement pump fits and functions correctly.
How to Photograph the Nameplate
Take several clear photos:
- A close-up taken directly in front of the plate
- A second photo from a slightly different angle
- A wider photo showing where the plate is located
- A photo with dirt or oil carefully removed from the plate
- A photo taken with flash and another without flash
Avoid shadows, glare and blurred images. Do not edit or sharpen the image so heavily that characters become distorted.
If one character is uncertain, identify it as uncertain rather than guessing. For example:
K3V112DT-?CGR
This is more useful than entering a possibly incorrect character as confirmed information.
Pump Model Code Versus Equipment OEM Part Number
The hydraulic pump manufacturer’s model code and the excavator manufacturer’s OEM number may both identify the pump, but they come from different numbering systems.
For example:
- The equipment manufacturer may list the pump under a machine-specific spare-parts number.
- The hydraulic manufacturer may identify it using a technical pump model code.
- An aftermarket supplier may use its own cross-reference number.
A good matching process connects these references rather than relying on only one of them.
OEM Part Number
The OEM number normally comes from:
- The machine parts catalogue
- Dealer documentation
- Previous purchase records
- A label on the pump
- An electronic parts system
An OEM number is very useful, but it should still be checked against the machine model and serial number. Equipment manufacturers sometimes supersede old numbers with newer numbers or use different pumps within one machine family.
Hydraulic Pump Model Code
The pump model code normally describes the pump itself. Depending on the brand and product family, it may contain information about:
- Series
- Frame size
- Displacement
- Single or tandem construction
- Rotation
- Shaft
- Mounting
- Control type
- Regulator
- Port configuration
- Special options
The complete code is more reliable than a general series name.
Casting Number
Casting numbers are commonly mistaken for part numbers.
A casting number may appear prominently on the housing but can be shared by several pump configurations. It should be treated as supporting information unless technical documentation confirms that it identifies the complete assembly.
Machine Information Required for Matching
Even when the pump nameplate is available, TerraParts Global recommends submitting complete machine information.
1. Equipment Manufacturer
Provide the machine brand exactly as shown on the nameplate or documents.
2. Complete Machine Model
Avoid simplified descriptions such as “20-ton excavator” or “PC200 pump.” Include the full model suffix when available.
Different generations of the same base model may use different main pumps.
3. Machine Serial Number
The serial number can help identify production changes within one model range. A hydraulic pump used in early production may differ from the pump installed in later machines.
Send a clear photo of the machine nameplate rather than typing the number only. This allows the supplier to verify the format and reduce transcription errors.
4. Existing Pump Number
Photograph every plate, label and stamped number on the old pump. Indicate where each number is located.
5. Original Part Number
If available, provide the number from the equipment parts catalogue, previous invoice or dealer quotation.
6. Application
State whether the pump is installed on an:
- Excavator
- Wheel loader
- Bulldozer
- Motor grader
- Drilling machine
- Crane
- Agricultural machine
- Mining machine
- Industrial hydraulic system
The same pump family may be configured differently for different equipment.
Physical Specifications That Must Be Checked
When a nameplate is damaged or missing, physical verification becomes more important.
1. Pump Type
Confirm whether the required unit is a:
- Axial piston pump
- Gear pump
- Vane pump
- Tandem pump
- Triple pump
- Pilot pump
- Charge pump
- Complete main hydraulic pump
- Pump assembly with regulator
- Bare rotating group or replacement component
Buyers sometimes request a “hydraulic pump” when they actually need a pilot pump, regulator, rotating group or seal kit.
Clarifying the required supply scope prevents incorrect quotations.
2. Displacement
Displacement is normally expressed in cubic centimetres per revolution, such as cc/rev.
Two pumps from the same family may have different displacement ratings. Using a different displacement can change hydraulic flow and machine response.
Never assume that pumps with similar housings have the same displacement.
3. Rotation Direction
Rotation may be clockwise or counter-clockwise when viewed from a specified end of the pump.
The viewing direction matters. A description of “clockwise” is incomplete unless both parties understand whether the pump is being viewed from the shaft end or another reference position.
Whenever possible, provide:
- The nameplate rotation marking
- A photo of the rotation arrow
- The technical manual specification
- The machine application
Incorrect rotation can prevent proper operation and may damage the pump.
4. Drive Shaft
Check the shaft:
- Spline count
- Shaft diameter
- Spline dimensions
- Keyed or splined design
- Shaft length
- Thread details
- Pilot diameter
A pump may have the correct series and mounting flange but a different drive shaft.
5. Mounting Flange
Record:
- Flange shape
- Pilot diameter
- Bolt-hole quantity
- Bolt-hole spacing
- Mounting-hole diameter
- Flange thickness
- Overall mounting dimensions
Photograph the mounting surface after the pump has been removed, if practical.
6. Oil Ports
Confirm the location and dimensions of:
- Suction port
- Pressure outlet
- Case-drain port
- Pilot lines
- Control ports
- Auxiliary connections
Compare port position, thread type, flange size and orientation.
A replacement pump with ports facing a different direction may interfere with the machine frame or require unsuitable hose modification.
7. Regulator and Control System
The regulator controls pump output according to pressure, load and machine demand. Pump series compatibility does not guarantee regulator compatibility.
Check:
- Regulator number
- Control type
- Solenoid configuration
- Connector design
- Sensor quantity
- Wiring connector
- Pressure-control arrangement
- Horsepower-control settings
- Electronic versus mechanical control
A mechanically similar pump with the wrong regulator may bolt onto the machine but fail to deliver the expected hydraulic response.
Complete Pump, Rebuilt Pump or Pump Parts?
Before requesting a quotation, determine what level of replacement is required.
New Complete Hydraulic Pump
A complete pump is generally the simplest option when the existing unit has major internal damage or when fast installation is required.
Confirm whether the quoted unit includes:
- Main pump body
- Regulator
- Solenoid valves
- Sensors
- Pilot or gear pump
- Coupling
- Installation seals
- Required plugs and fittings
“Complete pump” can mean different things to different suppliers.
Remanufactured Hydraulic Pump
A properly remanufactured pump should be disassembled, cleaned, measured, rebuilt with suitable components, adjusted and tested.
Ask for:
- Core condition requirements
- Components normally replaced
- Test procedure
- Test report availability
- Warranty
- Return-core requirements
- External appearance standard
A repainted used pump should not be represented as a fully remanufactured unit.
Hydraulic Pump Repair Parts
Repair parts may include:
- Piston shoes
- Cylinder block
- Valve plate
- Drive shaft
- Swash plate
- Retainer plate
- Ball guide
- Bearings
- Seal kit
- Regulator parts
- Solenoid valves
- Rotating group
Internal components must be matched to the exact pump configuration. A part described as suitable for a general pump series may not fit every version within that series.
Common Hydraulic Pump Series
International buyers frequently search for pump families such as:
- K3V hydraulic pump
- K5V hydraulic pump
- HPV hydraulic pump
- A8VO hydraulic pump
- A10VO hydraulic pump
- AP2D hydraulic pump
- PSVD hydraulic pump
- SBS hydraulic pump
- PVC hydraulic pump
- PVD hydraulic pump
These series keywords are useful for initial sourcing, but they are not sufficient for final order confirmation.
For example, two K3V-series pumps may have different displacement, control settings, shaft configurations and machine applications. TerraParts Global therefore does not confirm a pump using the family name alone.
A Practical Hydraulic Pump Matching Checklist
Before issuing a purchase order, confirm the following:
| Matching item | Required information |
|---|---|
| Machine | Manufacturer and complete model |
| Serial range | Machine serial number |
| OEM reference | Original equipment part number |
| Pump identification | Complete nameplate model code |
| Pump series | Full series and configuration |
| Displacement | cc/rev or documented specification |
| Rotation | Direction and viewing reference |
| Shaft | Spline, diameter and length |
| Mounting | Flange and bolt-hole dimensions |
| Ports | Position, size and connection type |
| Regulator | Model and control configuration |
| Electronics | Solenoids, sensors and connectors |
| Supply scope | Complete, bare, rebuilt or repair parts |
| Condition | New, remanufactured or aftermarket |
| Quantity | Required order quantity |
| Destination | Country, city or destination port |
If several pumps are being purchased, place this information in a spreadsheet with one line per item.
Common Matching Mistakes
Searching Only by Excavator Model
One excavator model may have different pump versions across production years or serial-number ranges.
Using Only a Casting Number
The casting may identify only the housing. It may not define the internal parts, regulator or complete assembly.
Submitting an Incomplete Model Code
The missing suffix may define an important configuration difference.
Ignoring the Regulator
A pump with the wrong regulator may physically fit but perform incorrectly.
Assuming Similar Appearance Means Interchangeability
Hydraulic pump housings are often visually similar. Internal displacement and controls cannot always be identified from an exterior photograph.
Ordering Internal Parts Before Inspecting the Pump
Internal damage should be evaluated before choosing a repair kit. Metal contamination, damaged housings or severe shaft wear may make a complete replacement more economical.
Comparing Quotations with Different Supply Scopes
One quotation may be for a bare pump, while another includes the regulator, pilot pump and solenoids. Compare the complete scope, not just the unit price.
What Buyers Should Ask a Hydraulic Pump Supplier
Before selecting an excavator hydraulic pump supplier, ask:
- How was compatibility confirmed?
- Which exact part number and pump model are quoted?
- Is the unit new, aftermarket, genuine, OEM-supply, rebuilt or used?
- What components are included?
- Is the regulator included and correctly configured?
- Are test results available?
- Can the supplier provide nameplate and product photos before shipment?
- What is the warranty period?
- What evidence is required for a warranty claim?
- Is installation by a qualified technician required?
- How is the pump protected during export transportation?
- Can the pump be consolidated with other equipment parts?
A professional supplier should clearly state when more information is required instead of confirming compatibility from insufficient evidence.
Quality Inspection Before Shipment
Inspection requirements depend on the pump type, condition and order value.
Applicable checks may include:
- Part-number verification
- Nameplate verification
- Visual condition
- Mounting dimensions
- Shaft and spline inspection
- Port configuration
- Regulator and connector comparison
- Rotation confirmation
- Leakage inspection
- Pressure and flow testing
- Packaging inspection
- Serial-number recording
For tested pumps, the report should identify the tested unit and relevant conditions. A generic test video that cannot be linked to the purchased pump offers limited traceability.
TerraParts Global can coordinate agreed inspection checkpoints with the selected supplier and retain photos or records for shipment identification.
Packaging Hydraulic Pumps for Export
Hydraulic pumps are heavy, high-value and sensitive to contamination.
Suitable packaging should include:
- Clean and sealed oil ports
- Protective shaft cover
- Anti-rust protection
- Moisture barrier
- Internal cushioning
- Strong plywood case or reinforced carton
- Secure fixing to prevent movement
- Part-number label
- Package identification
- Handling and weight markings
Open ports must not be exposed to dust or packaging debris. The pump should not move freely inside the case during road, sea or air transportation.
For mixed construction-equipment parts orders, the pump should be separated from heavy undercarriage components that could damage it.
How TerraParts Global Supports Hydraulic Pump Buyers
TerraParts Global supports equipment-parts importers, distributors, repair companies, mining operators and rental fleets.
We operate as a sourcing and supply-chain coordination partner. We do not claim that every hydraulic product is produced in one self-owned factory. Instead, we match each requirement with suitable supply resources according to the pump type, quality level, order quantity, documentation needs and destination market.
Our hydraulic pump sourcing process includes:
- Collecting the machine and pump information
- Reviewing nameplate numbers and reference numbers
- Identifying missing compatibility details
- Cross-checking available supply options
- Comparing the shaft, flange, ports and regulator
- Confirming the quoted supply scope
- Coordinating samples or additional verification when necessary
- Inspecting the agreed identification and quality checkpoints
- Consolidating the pump with other spare parts
- Preparing export packaging and shipment documents
This process helps buyers reduce wrong-part risk and manage orders containing products from several specialized supply sources.
Information Required for a Fast Quotation
Send the following information to receive an accurate quotation:
- Equipment brand
- Complete machine model
- Machine serial number
- OEM part number
- Full hydraulic pump model code
- Nameplate photos
- Photos of the complete pump
- Shaft and mounting photos
- Regulator and connector photos
- Quantity
- Required condition or quality level
- Delivery destination
- Required delivery date
If the nameplate is missing, send the old pump, component photos and accurate measurements for further review.
Request Hydraulic Pump Matching Support
The cost of a hydraulic pump mismatch is not limited to the part price. It may also include return freight, customs costs, technician time, machine downtime and lost production.
Correct identification should therefore take place before quotation approval and payment.
Whether you require a main hydraulic pump for an excavator, an aftermarket hydraulic pump, a remanufactured unit or internal hydraulic pump parts, TerraParts Global can help organize part-number verification, supplier coordination, inspection, mixed-parts consolidation and international delivery.
Send us the machine model, serial number, pump nameplate and required quantity to begin the matching process.
Frequently Asked Questions
Where can I find the hydraulic pump part number?
Start with the pump nameplate. Also check the equipment parts catalogue, dealer records, previous invoices and stamped numbers. Do not assume a large casting number identifies the complete pump.
Can I order a pump using only the excavator model?
It is possible in some cases, but not recommended. Submit the machine serial number and full pump nameplate because one machine model may use different pump configurations.
Are all pumps from the same series interchangeable?
No. Pumps in the same series may differ in displacement, rotation, shaft, flange, ports, regulator and electronic controls.
What if the pump nameplate is damaged?
Send clear photos of the complete pump, machine nameplate, mounting flange, shaft, ports, regulator and connectors. Accurate measurements and the OEM number can also help.
What is the difference between a complete pump and a bare pump?
A complete unit may include the regulator, pilot pump, solenoids and sensors. A bare pump may exclude some of these components. Always confirm the quotation scope in writing.
