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172A64-73200 PVD-0B-16BP-6AG4-5503D Main Hydraulic Pump for Yanmar VIO15 VIO17 VIO15-2 VIO17-A Mini Excavator (Point-by-Point Layout)
1. OEM Part Number & Machine Compatibility
Original pump model: Nachi PVD-0B-16BP-6AG4-5503D variable displacement piston pump assembly
Yanmar OEM part number: 172A64-73200
Fully compatible mini excavator models: Yanmar VIO15, VIO17, VIO15-2, VIO17-A
Unified mounting flange, input shaft spline and hydraulic port layout enables direct replacement across all four machine variants
2. Core Technical Specifications
Structure type: Integrated assembly of variable axial piston main pump and built-in pilot charge gear pump
Main pump displacement matches original hydraulic system design tailored for ultra-small VIO15/VIO17 excavator platform
Rated continuous working pressure complies with factory system settings, with preset maximum relief pressure for reliable overload protection
Operating rotation speed range is precisely calibrated to match rated speed of the original engine fitted on these compact machines
Mounting bolt layout, input shaft dimension and hydraulic port positioning strictly follow OEM dimensional standards
Pump housing is constructed from ductile iron; internal pistons, valve plates and friction components use quenched alloy steel to enhance wear resistance and extend total service life
3. Internal Structure & Functional Introduction
Main piston pump generates high-pressure hydraulic oil to actuate boom, arm, bucket, travel and swing operational movements
Integrated pilot gear pump supplies steady pressurized oil for pilot control circuits and system makeup oil replenishment
Built-in power adjustment regulator automatically modulates pump flow output in response to load fluctuations, preventing engine stall during heavy digging operations
Compact integrated structure maximizes space efficiency inside the extremely limited hydraulic compartment of micro excavators
4. Product Advantages
Exact 1:1 OEM outer casting dimensions, enabling plug-and-play installation with no modifications needed to hydraulic piping or chassis mounting structure
Every finished pump completes comprehensive hydraulic bench inspection covering pressure stability, flow consistency and internal leakage testing before shipment
Complete maintenance spare parts are held in stock, including overhaul seal kits, piston assemblies, swash plates and valve plates for separate component replacement during repair work
Single part number fits four model versions, streamlining inventory management for spare part suppliers and repair service workshops
5. Packaging & Global Delivery Details
Input shaft and all hydraulic ports are coated with anti-rust grease and sealed with protective dust plugs
The entire pump is wrapped with moisture-proof plastic film and secured inside export-grade solid wooden crate to prevent collision and moisture damage during long-distance sea or air transportation
In-stock items can be dispatched within 3 to 5 working days after order confirmation
Multiple global shipping solutions are available: international air express, sea LCL/FCL bulk shipment and overland truck transportation for Southeast Asian markets
6. FAQ
Q: Can this pump be installed directly on VIO15, VIO17, VIO15-2 and VIO17-A?
A: Yes, consistent mounting dimensions and factory-calibrated hydraulic parameters support direct bolt-on fitting for all four listed models with no extra adjustment required.
Q: What is the difference between PVD-0B-16BP-6AG4-5503D and 172A64-73200?
A: PVD-0B-16BP-6AG4-5503D is the internal model designation from Nachi, while 172A64-73200 is the exclusive OEM part number designated by Yanmar for this full pump assembly.
Q: Are individual repair components available for this hydraulic pump?
A: Corresponding full overhaul seal kits, piston shoe assemblies, valve plates, swash plates and standalone pilot gear pump spare parts are all available for partial overhaul and individual component replacement work.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2013
Total Annual:
900000-3000000
Employee Number:
50~93
Ecer Certification：
Verified Supplier
GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.... GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service....
