Match the attachment's required supply, return and control conditions to the excavator's documented auxiliary configuration. Collect model-specific data for both machines, then obtain written compatibility approval covering connections, mounting and the intended duty.
Shown as a configuration reference. Availability and the equipment offered for your project are confirmed separately.
Compare the documented auxiliary configuration
Begin with the exact excavator model, regional specification and proposed attachment model. Request the machine’s available auxiliary supply and return specifications at the connection points used by that attachment. A main-pump catalogue figure, the appearance of a quick coupler or a general machine weight class does not establish an approved equipment combination.
Ask the excavator supplier and attachment maker to identify the configuration covered by their compatibility statement. Include the intended task, material, operating environment and duty pattern in the request. Where the excavator is already installed, provide its serial number and details of existing hoses, valves, couplers and approved modifications.
Request both sides of the hydraulic interface
The SANY SY26U reference configuration includes proportional auxiliary control on joysticks and adjustable oil flow for attachments [S1]. The Kubota U27-4 high-specification version offers two auxiliary circuits with proportional control and a third-line hydraulic return [S2]. These describe named reference configurations. Confirm the exact offered specification and the attachment manufacturer’s requirements before treating any feature as suitable for your project.
Collect the attachment’s permitted supply-flow range, required working conditions, pressure and relief requirements, allowable return backpressure and any external case-drain specification. Obtain the corresponding excavator data, including the available control arrangement and how its auxiliary specification is defined. Have the responsible engineers compare the complete set of requirements; do not infer compatibility from a single maximum value.
Use an interface worksheet for quotation review
| Interface item | Information from the excavator supplier | Information from the attachment maker | Evidence required |
|---|---|---|---|
| Supply flow | Available auxiliary delivery range and stated conditions | Permitted flow range and duty requirements | Written confirmation for the proposed combination |
| Pressure and relief | Auxiliary circuit specification and approved settings responsibility | Working, maximum and relief requirements | Configuration-specific engineering approval |
| Return and case drain | Connection arrangement and stated return limits | Allowable backpressure and any separate drain requirement | Approved circuit drawing identifying each connection |
| Controls | Available functions, controls and option identification | Required control behaviour and operating functions | Confirmation that the quoted controls support the attachment |
| Hoses and couplers | Connection sizes, standards, routing and supplied scope | Port specifications and connection requirements | Approved interface schedule and itemised supply scope |
| Mounting | Hitch, pin and approved attachment information | Bracket drawing, mass and application restrictions | Written mechanical compatibility approval |
Treat a mismatch as an engineering decision
If any required condition is outside the documented machine specification, pause the selection and request an approved alternative configuration. The quotation should identify any proposed change, who designs and supplies it, and what evidence establishes compatibility after the change. Reconfirm the complete interface when the attachment or excavator model changes.
Do not accept extra hoses, an adapter, a flow-control component or an existing return connection as a complete solution by description alone. Require the relevant manufacturers’ approval and an updated circuit or interface drawing. Clarify the effect of a proposed modification on warranty, inspection, maintenance and support within the agreed project scope.
Agree a supervised verification and handover scope
Ask qualified personnel to define any demonstration or commissioning checks under configuration-specific manufacturer instructions and approved site arrangements. The purchasing documents should identify the exact equipment combination, task, acceptance evidence and responsible personnel. Retain the approved configuration record and the results required by the contract.
Include operating and maintenance documentation, connection identification, operator familiarisation, spare-part scope and support responsibilities in the handover list. Have the supplier explain any restrictions on permitted attachments or future changes. This guide helps assemble procurement evidence; it does not establish machine settings, authorise a modification or replace the manufacturer’s instructions.
Prepare a complete equipment request
Send IndustryApex engineers the excavator identification, attachment model or intended task, interface documents, site conditions and destination. Flag any missing information so it can be resolved before an equipment proposal is confirmed. Our engineers review the machine, attachment and integration requirements as one project scope.
Use the mini excavator buying guide for the broader machine selection and RFQ checklist. Include OEM or ODM requirements when the mounting arrangement, controls, branding or complete attachment package needs development. Feasibility, validation, cost, lead time and commercial commitments are confirmed in the project quotation.
Define your equipment requirements
Review the Mini excavator buying guide for the complete equipment scope.
Discuss this equipment project ↗ · OEM requirements · ODM requirements. Configuration and feasibility are reviewed for your application.
Frequently asked questions
Which machine details are needed for an attachment compatibility check?
Provide the exact excavator model, regional specification and serial number when available. Include its documented auxiliary configuration, existing interface details and any approved modifications, together with the attachment model and intended task.
What return-line and case-drain evidence should I request?
Ask the attachment maker to state allowable return backpressure and any separate external drain requirement. Obtain the excavator's matching connection specification and an approved drawing identifying the complete supply, return and drain arrangement.
Can an adapter or flow-control component solve a mismatch?
Require configuration-specific engineering approval before accepting any proposed change. The quotation should identify the component, design responsibility, updated interface drawing, validation and the effect on warranty and support.
How should the attachment control arrangement be confirmed?
Ask the attachment maker to define the required functions and control behaviour. Obtain written confirmation that the exact excavator options and supplied controls support those functions for the proposed application.
What belongs in the final handover package?
Include the approved machine-and-attachment configuration, interface drawings, connection identification, manufacturer instructions, agreed commissioning evidence, familiarisation and the contracted spare-part and support scope.
Reference information
- SY26U – SANY Europe
- Mini Excavators Kubota U27-4 - Kubota
Reference data and images explain equipment configurations. IndustryApex engineers confirm the offered model, specification and commercial scope in your project quotation.