Aftermarket reference · Machine fit must be confirmed
FTB A-056 PC check valve
FTB’s catalogue labels KYBTB-A-056 a PC check valve. Its current listing gives reference 723-46-41110 and a broad Komatsu PC application, but does not establish a specific machine serial range, dimensions or hydraulic rating.
Connect the catalogue code to the quoted part
KYBTB-A-056
The internal catalogue code appears beside “PC CHECK VALVE” on PDF page 4. A-055 beside it is labelled a regeneration valve; the surrounding spread also includes relief valves. The section heading cannot substitute for the individual component’s function. [2]
723-46-41110
The current official listing gives this as its part reference and “Komatsu PC” as the application. Ask the supplier to connect both identifiers to the same controlled drawing, offered components and invoice line. [1]
No exact machine model, serial range or OEM cross-reference document was verified. The listing is an aftermarket offer; neither the number nor the photograph establishes genuine Komatsu origin.
Resolve the machine, valve block and interfaces together
| Check | Information to send | Supplier response needed |
|---|---|---|
| Machine identity | Full model, serial range and applicable machine parts record | Supported application and limitations for the proposed reference |
| Hydraulic location | Valve-block identification, circuit location and original assembly reference | Where the proposed valve belongs and its intended function |
| Physical fit | Controlled old-part/block drawing or documented measurements | Dimensioned offered-part drawing, seats/interfaces and stated differences |
| Hydraulic behaviour | Original component requirements and controlled test procedure | Applicable opening/flow and reverse-leakage criteria with conditions |
| Installation | Machine service instructions and surrounding component condition | Applicable orientation, assembly, seals and installation requirements |
The reviewed sources do not give opening pressure, pressure/flow ratings, leakage limits, material, seat dimensions or installation torque. [1] These fields remain unknown. Do not take values from a neighbouring relief valve or apply a general PC-family specification to this part.
Can a photograph identify the valve on its own?
It can help the supplier compare an old part, but cannot establish internal clearances, seat condition or hydraulic behaviour. Keep identification separate from acceptance; require written support for the exact proposed replacement.
What is actually included in one ordered unit?
The official photograph shows two cylindrical components. It does not establish whether the quote supplies both pieces, an assembled valve, a sleeve/seat or associated seals. Request an itemized supply boundary and assembly illustration before comparing prices. Do not infer quantity or assembly completeness from the photograph.
The listing describes new condition, neutral/FTB packaging and sea, air or express shipment. [1] These are advertised options, not confirmed stock, dispatch time or warranty. Have the quotation identify the actual maker, seller, packing protection, supplied quantity and remedy for missing or mismatched pieces.
A replacement needs evidence beyond a “high quality” label
- Approve the documents. Connect A-056 / 723-46-41110 to a drawing revision, included components and supported machine application.
- Agree the check conditions. Request applicable dimensional and hydraulic acceptance criteria, fluid/temperature and test arrangement. Distinguish representative data from the delivered part or batch record.
- Keep installation controlled. Qualified personnel should follow the relevant machine and component instructions. This page provides no improvised disassembly, pressure-setting or live hydraulic test procedure.
- Record continuity. Retain part/batch identification, acceptance results, approved changes and the remedy for a wrong-fit or nonconforming delivery.
ISO 4413 covers hydraulic safety across systems and components. [3] Its scope supports the need for controlled installation and maintenance; it does not certify this component. CivilEquip has not tested the valve or diagnosed a machine fault. A slow or abnormal machine movement is not by itself proof that this check valve needs replacement.
Send an identification request before an order
Sources & review
- FTB current A-056 product listing ↗
PC check valve, 723-46-41110, broad Komatsu PC application and new condition. No supported serial range or numeric ratings.
2026-10-11 - FTB 2026 catalogue · PDF page 4 ↗
PC check valve KYBTB-A-056; adjacent regeneration/relief entries have distinct codes. Cover names Hanqi manufacturing and Futebang sales roles.
2026-10-11 - ISO 4413 publisher scope ↗
General hydraulic-system/component safety context. Not a product test or an OEM fit approval.
2026-10-11
Specifications come from the manufacturer’s published information and the sources above; buying advice is written by CivilEquip with AI assistance. Ask the manufacturer to confirm the data for your configuration. Editorial policy · Report a correction.