Choosing an excavator hydraulic pump by appearance alone is risky. The safest identification method is to combine the OEM pump assembly part number, the complete pump manufacturer model code, the excavator model and serial number, a clear nameplate photograph, and the pump’s physical configuration.
Short answer: Start with the number on the pump nameplate or the machine parts catalog, but do not place an order until the input shaft, mounting flange, rotation, regulators, pilot pump and port arrangement have also been checked. A shared pump family name—such as K3V112DT—does not automatically mean that every version is
Several different numbers may appear on an excavator hydraulic pump. They do not all identify the complete assembly.
| Number type | Where it is usually found | What it tells you | Can it identify the pump alone? |
|---|---|---|---|
| OEM assembly part number | Machine parts book, dealer record, invoice or pump label | The machine manufacturer’s number for the pump assembly | Strong starting point, but supersessions and serial breaks must be checked |
| Pump manufacturer model code | Metal nameplate on the pump | Pump family and detailed configuration | Usually very useful only when the complete suffix is visible |
| Pump serial/specification number | Nameplate or production label | Production and configuration information | Useful for technical confirmation |
| Casting number | Cast into the housing or cover | Identifies a casting or housing family | No; the same casting may be used in several configurations |
| Regulator, solenoid or pilot-pump number | On an attached component | Identifies that individual component |
No; it may not identify the main pump assembly |
The most common mistake is sending a casting number or regulator number while believing it is the main pump part number.
Check these sources in order:
- The pump nameplate. Photograph the whole plate straight on and take a second close-up in good light.
- The excavator parts catalog. Use the exact machine model and serial-number range.
- The machine identification plate. Record the full model and product identification or serial number.
- Previous invoices or service records. Confirm that the recorded pump was actually installed on the machine.
- The removed pump. Document its shaft, flange, regulators, pilot pump and every major port before cleaning, rebuilding or returning it.
If the nameplate is damaged, do not rely on one partially visible number. Combine all available evidence.
Machine model names are not always enough. Production changes can introduce a different pump, regulator or controller within the same model series. Record:
- full excavator model;
- machine serial number or PIN;
- approximate production year, if known;
- engine model, when relevant;
- whether the hydraulic system is original or has been modified.
Do not send a tightly cropped image of one number. Send:
- one photo showing where the plate is located on the pump;
- one straight, close, high-resolution photo;
- one angled photo using side lighting if the characters are faint;
- a typed transcription of every visible letter, number, dash and suffix.
A missing suffix can change the control type, port layout or application.
An OEM part number and a pump manufacturer code may refer to the same installed assembly, but they serve different catalog systems.
For example, the IRON CAVALRY website lists an excavator pump using OEM references 5504341 / 5659737 together with the pump code K7V180DTP for specified machine applications. Keeping both number systems in the inquiry gives the supplier more evidence to verify the match.
See the related product example: 5504341 / 5659737 K7V180DTP excavator hydraulic pump.
The family code is often only the beginning. Codes within the K3V112 range, for example, may include different suffixes describing configuration or application. Never shorten a complete nameplate code to the family name when requesting a quotation.
The difference between a broad family description such as K3V112DT and a complete code can matter. Compare the available K3V112DT hydraulic pump family only after confirming the full plate and physical configuration.
Two pumps can look similar from one angle and still be incompatible. Photograph and compare:
- input-shaft diameter, spline count and exposed length;
- mounting-flange shape and bolt-hole pattern;
- suction and delivery port size and orientation;
- regulator quantity, type and position;
- solenoid connectors and voltage, where applicable;
- pilot-pump location and drive;
- sensor and pressure-port locations;
- rear-cover and tandem-pump arrangement;
- clockwise or counterclockwise rotation, viewed from the specified shaft end.
Do not infer rotation from a single photograph. Confirm it from reliable technical documentation or the complete pump code.
Manufacturers may replace an older part number with a newer number. A supersession can be valid, but it does not mean that every pump with a similar family code is a direct replacement.
Ask the supplier to state:
- the number you supplied;
- any superseding number;
- the proposed pump model and full code;
- the confirmed machine model and serial-number range;
- any parts that must be transferred from the old pump;
- whether adjustment, calibration or commissioning is required.
A reliable quotation should repeat the identification evidence, not just show a price. Confirm the part number, machine information, configuration photographs and condition—new, remanufactured or rebuilt—on the quotation or proforma invoice.
Hydraulic pump families are produced in multiple configurations. Differences can include control strategy, displacement setting, regulator specification, shaft, flange, port direction, pilot pump and electronic connectors.
This is why a search for “K3V112 pump” may return several visually similar results. The family name helps locate candidates; the complete suffix and machine data determine whether a specific unit is suitable.
Before approving an excavator main pump, verify all eight items:
- OEM assembly part number
- Complete pump model code and suffix
- Excavator model
- Machine serial number or PIN
- Pump nameplate photographs
- Shaft and mounting flange
- Regulator, pilot pump and port layout
- Rotation and control requirements
If any item conflicts, stop and resolve the difference before shipment.
Send six clear photographs:
- complete pump from the drive-shaft side;
- complete pump from the rear;
- left side showing ports and regulators;
- right side showing ports and attached components;
- full nameplate and close-up nameplate;
- excavator identification plate.
Add close-ups of the shaft spline, connectors or damaged label when necessary. Keep the original high-resolution files; messaging applications may compress small characters.
One machine model can have serial-number breaks or market-specific configurations.
“K3V112,” “K5V,” or another family name may omit the suffix needed to identify the control and installation configuration.
A housing number can appear on several pumps and does not confirm the internal build.
The excavator may already contain a converted, rebuilt or non-original pump. Compare the machine record with the unit physically installed.
Glare, oil and oblique angles can hide a single character. That character may be important.
Changing fittings does not solve every mismatch. Porting, control components and internal configuration must be confirmed together.
IRON CAVALRY supports hydraulic-pump identification using the supplied part number, complete pump code, machine model, serial number, nameplate and configuration photographs. The proposed unit can then be checked against the shaft, flange, regulators, pilot pump and port arrangement before order confirmation.
Where inspection or bench testing is included in the agreed supply scope, the pump configuration and test record can be reviewed before export packing. Product suitability still depends on technical confirmation for the customer’s specific machine.
Browse the excavator hydraulic pump range or the Kawasaki hydraulic pump range.
Copy and complete this form:
Excavator model:
Machine serial number/PIN:
OEM pump part number:
Complete pump model code:
All nameplate text:
Pump condition required: New / Remanufactured / Rebuilt
Delivery country:
Attached photos: Nameplate / Complete pump / Shaft / Ports / Machine plate
Providing this information at the beginning reduces repeated questions and helps the technical team identify discrepancies before shipment.
Sometimes an exact OEM number identifies a candidate assembly, but final confirmation should also use the machine serial number, complete pump code, nameplate and external configuration. This is especially important when part numbers have been superseded or the machine has been modified.
Usually it is a casting or housing number, not the complete pump assembly number. Send it as supporting evidence, not as the only identifier.
Provide the excavator model and serial number, parts-catalog reference, complete pump photographs, shaft dimensions, flange pattern, regulator arrangement and port layout. Identification may still be possible, but additional technical checks will be required.
No. Online model lists are a search aid. Confirm the complete code, machine serial range and physical configuration before ordering.
The suffix may distinguish control, shaft, port, regulator or application details. Omitting it can lead to a pump that looks similar but cannot be installed or controlled correctly.
Yes, manufacturers sometimes issue superseding numbers. Ask for written confirmation of the supersession and verify whether any installation parts or adjustments are required.
Yes, particularly when the plate is damaged or the machine history is uncertain. Record spline count, diameter, exposed length and flange dimensions.
Send the exact machine model, serial number, all visible pump numbers and six clear photographs in the first message. State whether you need a complete pump, a repair assembly or internal parts.
Use the part number to begin the search—not to end the verification. The correct excavator hydraulic pump is the unit whose documented number, full configuration code and physical installation details all match the specific machine.
For technical identification, send IRON CAVALRY the machine model, serial number, nameplate and complete pump photographs before requesting final order confirmation.