Q: What is the pump model?
A: The pump model is HPK055AT.
Q: Which machine is associated with YNF19023?
A: The supplied machine reference is RH18A.
Q: What does 17T mean?
A: It refers to the supplied 17-tooth drive configuration.








HPK055AT Hydraulic Pump Assembly with 17T drive supports stable hydraulic power for B2B excavator parts repair and wholesale sourcing.
The HPK055AT Hydraulic Pump Assembly YNF19023 is supplied for compatible RH18A hydraulic applications. Mechanical drive power is converted into hydraulic flow so pressurized oil can be supplied to the machine’s working circuits during operation.
A 17-tooth input configuration is provided for this pump reference and should be checked carefully when a replacement unit is being selected. Because hydraulic pumps can share similar external housings while using different shafts, flanges, regulators, or port arrangements, visual comparison alone should not be relied upon.
For B2B buyers, the HPK055AT pump assembly should be confirmed by pump model, RH18A application, 17T drive, shaft configuration, mounting flange, hydraulic port layout, nameplate, and existing-pump photos before quantity purchasing. Accurate verification helps repair workshops and distributors reduce installation mismatches, customer returns, repeat freight costs, and machine downtime.
| Parameter | Specification |
|---|---|
| YNF Part Number | YNF19023 |
| Pump Model | HPK055AT |
| Machine Reference | RH18A |
| Product Name | Hydraulic Pump Assembly |
| Alternative Name | Hydraulic Pump / Excavator Pump Assembly / Main Pump |
| Product Type | Hydraulic Power Component |
| Parts Category | Excavator Hydraulic Parts |
| Drive Configuration | 17 Teeth / 17T |
| Main Function | Hydraulic Flow and Pressure Supply |
| Application | Compatible Machinery Hydraulic System |
| Installation | Engine-to-Hydraulic Pump Drive Area |
| Material | Precision Metal Assembly |
| Fitment Check | Pump Model / 17T Drive / Shaft / Flange / Port Layout / Nameplate / Existing Part Photo |
| Quality Type | Aftermarket Replacement |
| Condition | New |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Piece |
| Shipping Method | Air, Sea, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application | Description |
|---|---|
| RH18A Machine | Used in compatible hydraulic-system applications |
| Hydraulic Power Supply | Provides hydraulic flow for machine operation |
| Excavator Working Circuits | Supports compatible actuator and hydraulic functions |
| Hydraulic System Repair | Suitable for replacement during pump-system servicing |
| Pump Replacement | Used when the existing hydraulic pump requires renewal |
| Machine Overhaul | Can be included in complete hydraulic-system rebuilding |
| Hydraulic Workshop | Suitable for professional machinery repair businesses |
| B2B Parts Stocking | Practical for wholesalers, dealers, and importers |
Q: What is the pump model?
A: The pump model is HPK055AT.
Q: Which machine is associated with YNF19023?
A: The supplied machine reference is RH18A.
Q: What does 17T mean?
A: It refers to the supplied 17-tooth drive configuration.
YNF Machinery supplies HPK055AT hydraulic pump assemblies and related excavator hydraulic components for machinery dealers, hydraulic repair workshops, wholesalers, and international importers.
The YNF19023 17T pump assembly is intended for compatible RH18A replacement requirements. Since hydraulic pumps are higher-value precision components, the pump model and drive configuration should be confirmed carefully before purchasing.
Professional buyers can provide the HPK055AT model, RH18A machine information, 17-tooth drive details, pump nameplate, mounting flange, hydraulic port photos, and required quantity for fitment confirmation.
Related pump regulators, solenoid valves, hydraulic motors, seal kits, couplings, and hoses can also be included in the same inquiry, helping B2B buyers consolidate hydraulic repair parts and reduce fragmented sourcing.
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