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Yanmar OEM part numbers: 172B04-73100, 172B04-73120, 172B04-73130 172B04-73110
Fully compatible mini excavator models: Yanmar VIO50-6A, VIO50-6B, VIO50-2A
All three listed part numbers share identical external mounting dimensions and internal hydraulic configuration, supporting mutual cross replacement for these machine models
2. Core Technical Specifications
Structure type: Integrated unit of variable main piston pump and built-in pilot charge gear pump
Main pump displacement: 17 cm³/rev, matched to original ViPPS hydraulic system design of VIO50 series excavator platform
Rated continuous working pressure: 24.5 MPa; preset maximum relief pressure provides reliable overload protection for the whole hydraulic system
Operating rotation speed range precisely calibrated to match rated speed of original engine equipped on these compact excavators
Mounting bolt layout, input shaft spline size and hydraulic port orientation strictly comply with OEM dimensional drawings
Pump housing adopts ductile iron material; internal pistons, valve plates and friction components use quenched alloy steel to improve wear resistance and extend service lifespan
3. Internal Structure & Functional Introduction
Main piston pump outputs high-pressure hydraulic oil to drive boom, arm, bucket, travel and swing working movements
Integrated pilot gear pump supplies stable pressurized oil for pilot control circuits and system hydraulic oil replenishment
Built-in power adjustment regulator automatically modulates pump flow output responding to load changes, preventing engine stall during heavy digging operations
Compact integrated layout fits neatly inside the limited hydraulic compartment of VIO50 series mini excavators
4. Product Advantages
Exact 1:1 OEM outer casting dimensions, enabling plug-and-play installation with no modification to hydraulic pipelines or chassis mounting structure
Every finished pump undergoes 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
Three interchangeable part numbers fit three machine variants, simplifying inventory planning 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: Are 172B04-73100, 172B04-73120 and 172B04-73130 interchangeable?
A: Yes, all three part numbers correspond to the same PSVD2-17E pump assembly with matching installation dimensions and internal hydraulic parameters, suitable for cross fitting on VIO50-6A, VIO50-6B and VIO50-2A directly.
Q: Can this pump install directly on all three listed Yanmar models?
A: Yes, unified mounting sizing and factory-calibrated hydraulic settings support direct bolt-on fitting for VIO50-6A, VIO50-6B and VIO50-2A with no extra adjustment required.
Q: Are individual repair spare parts 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
Year Established:
2013
Total Annual:
$28000000-$41660000
Employee Number:
1200~1300
Ecer Certification：
Verified Supplier
Since 2013
Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013
Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts
Who We Are
Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
Since 2013
Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013
Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts
Who We Are
Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
