708-1U-13211 Valve Plate controls hydraulic oil port timing for B2B excavator pump rebuilding, repair inventory, and wholesale sourcing.
The 708-1U-13211 Valve Plate YNF19177 is a precision internal component used in compatible hydraulic piston pump assemblies. It provides the porting surface through which hydraulic oil is distributed between the suction and pressure sides while the cylinder block rotates against the plate.
Because the valve plate works directly with the cylinder block, its contact surface is exposed to continuous sliding, hydraulic pressure, oil-film lubrication, and contamination. Scoring, abnormal wear, erosion, overheating marks, or loss of surface flatness can affect internal sealing and hydraulic pump efficiency.
For professional B2B buyers, the 708-1U-13211 Valve Plate should be matched by part number, hydraulic pump model, pump nameplate, port pattern, overall dimensions, mating surface, and removed-part photos. During pump rebuilding, the cylinder block condition should also be inspected because both components form a critical sealing pair. Accurate matching helps reduce repeated pump disassembly, repair delays, and incorrect inventory.
| Parameter | Specification |
|---|---|
| YNF Part Number | YNF19177 |
| Part Number | 708-1U-13211 |
| Product Name | Hydraulic Pump Valve Plate |
| Alternative Name | Distribution Plate / Port Plate / Oil Distribution Plate |
| Product Type | Hydraulic Pump Internal Precision Component |
| Parts Category | Excavator Hydraulic Pump Parts |
| Pump Type | Compatible Piston Hydraulic Pump |
| Main Function | Controls Hydraulic Oil Distribution Between Suction and Pressure Ports |
| Application | Hydraulic Pump Internal Repair and Rebuilding |
| Installation | Between the Cylinder Block and Pump Porting Section |
| Working Medium | Hydraulic Oil |
| Service Type | Valve Plate Replacement / Hydraulic Pump Overhaul |
| Fitment Check | Part Number / Pump Model / Pump Nameplate / Port Pattern / Dimensions / Mating Surface / 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 |
|---|---|
| Piston Hydraulic Pump | Used inside compatible hydraulic pump assemblies |
| Oil Flow Distribution | Controls oil transfer through suction and pressure passages |
| Hydraulic Pump Rebuild | Suitable for complete internal pump overhaul |
| Cylinder Block Service | Works as the mating distribution surface for the cylinder block |
| Internal Leakage Repair | Can be replaced when sealing surfaces show excessive wear |
| Pump Core Reconditioning | Suitable for professional hydraulic pump remanufacturing |
| Hydraulic Workshop | Practical for specialized pump repair businesses |
| B2B Parts Stocking | Suitable for hydraulic parts dealers and wholesalers |
Q: What does the valve plate do?
A: It controls hydraulic oil distribution between the suction and pressure sides of a compatible piston pump.
Q: Does it work with the cylinder block?
A: Yes. The cylinder block rotates against the valve plate, making the mating surfaces important during rebuilding.
Q: When should a valve plate be replaced?
A: Replacement may be required when scoring, erosion, overheating marks, or excessive surface wear are found.
YNF Machinery supplies 708-1U-13211 hydraulic pump valve plates and related precision pump components for excavator workshops, hydraulic pump rebuilders, machinery dealers, wholesalers, and international importers.
The YNF19177 distribution plate is a precision mating component, so professional buyers should check more than the reference number. Pump model, port arrangement, plate profile, dimensions, and working-surface condition should all be compared before quantity purchasing.
Buyers can provide the 708-1U-13211 part number, hydraulic pump model, required quantity, pump nameplate photos, valve plate measurements, cylinder block photos, and clear images of the removed component for matching.
Cylinder blocks, piston assemblies, retainers, swash plates, cam rockers, pump shafts, bearings, servo pistons, regulators, and seal kits can also be consolidated into the same order for more efficient B2B hydraulic pump repair sourcing.
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