Quality Yanmar B50 B50-2 B50-2B Main Hydraulic Pump 172165-73101 Rexroth AP2D21 For Mini Excavator Repair Parts factory

Yanmar B50 B50-2 B50-2B Main Hydraulic Pump 172165-73101 Rexroth AP2D21 For Mini Excavator Repair Parts

Name: Yanmar B50 B50-2 B50-2B Main Hydraulic Pump 172165-73101 Rexroth AP2D21 For Mini Excavator Repair Parts
Brand: BELPARTS MACHINERY LIMITED
SKU: B50 B50-2 B50-2B
Price: 475.00 USD
Availability: InStock

Place of Origin:China

Brand Name:BELPARTS

Certification:2006/42/EC ISO9001

Model Number:B50 B50-2 B50-2B

Minimum Order Quantity:1PCS

Price:Negotiated price

Payment Terms:T/T,trade assurance,PayPal,L/C,D/P,D/A,Western Union,

Supply Ability:100 PCS / Months

Product Details

Highlight:

Yanmar B50 hydraulic pump

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excavator main hydraulic pump

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Rexroth AP2D21 repair parts

Model: B50 B50-2 B50-2B

Part Name: Hydraulic Pump

Part Number: 172165-73101

Warranty: 1 Year

Application: Excavator

Shipment: Sea / Air / Express DHL FEDEX UPS

Quality: High Qaulity

Category: Excavator Repair Parts

Product Description

172165-73101 Rexroth AP2D21 Main Hydraulic Pump for Yanmar B50 B50-2 B50-2B Mini Excavator (Point-by-Point Layout)

1. OEM Part Number & Machine Compatibility

Yanmar OEM part number: 172165-73101
Original pump model: Rexroth Uchida AP2D21 variable displacement piston pump assembly
Fully compatible mini excavator models: Yanmar B50, B50-2, B50-2B
Consistent mounting flange, input shaft spline and hydraulic port layout enables direct cross replacement among these three machine variants

2. Core Technical Specifications

Structure type: Tandem variable axial piston main pump integrated with built-in pilot gear pump
Main pump displacement: 21 cc/rev
Rated continuous working pressure: 24.5 MPa; preset maximum system relief pressure: 31.4 MPa
Working rotation speed is precisely matched to the original engine rated speed configuration of Yanmar B50 series excavators
Mounting bolt positions, shaft dimension and oil port orientation strictly conform to OEM drawing standards
Pump housing adopts ductile iron material; internal pistons, valve plates and wear parts are made of quenched alloy steel to enhance wear resistance and service life

3. Internal Structure & Functional Introduction

Main piston pump outputs high-pressure hydraulic oil to drive boom, arm, bucket, travel and swing operating movements
Integrated pilot gear pump supplies stable pressure oil for pilot control circuit and system oil replenishment
Built-in power limiting regulator automatically adjusts pump flow output according to load changes, effectively preventing engine stall under heavy-load digging conditions
Compact integrated structure saves installation space inside the hydraulic compartment of medium-sized mini excavators

4. Product Advantages

Exact 1:1 OEM external casting dimension, supporting plug-and-play installation with no modification to hydraulic pipelines or chassis structure
Every finished pump passes complete hydraulic bench inspection for pressure stability, flow consistency and internal leakage before shipment
Complete maintenance spare parts are available in stock, including overhaul seal kits, piston assemblies, swash plates and valve plates for individual component replacement during repair
Single part number covers three model iterations, helping dealers and repair shops simplify spare part inventory management

5. Packaging & Global Delivery Details

Input shaft and all hydraulic oil ports are coated with anti-rust grease and sealed with protective dust plugs
Entire pump wrapped with moisture-proof plastic film and fixed inside export-grade solid wooden crate to avoid collision and damp 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 options are available: international air express, sea LCL/FCL bulk shipment and overland truck transportation for Southeast Asian markets

6. FAQ

Q: Can this AP2D21 pump fit B50, B50-2 and B50-2B directly?
A: Yes, part number 172165-73101 is specially calibrated for all three B50 series models with identical installation size and matching hydraulic parameters for direct bolt-on replacement.
Q: Are separate repair spare parts available for this hydraulic pump?
A: Matching full overhaul seal kits, piston shoe assemblies, valve plates, swash plates and independent pilot gear pump spare parts are all in stock for partial overhaul maintenance.
Q: What does AP2D21 stand for?
A: AP2D21 is the original model designation of Rexroth Uchida pump, while 172165-73101 is the exclusive OEM part number designated by Yanmar for this complete pump assembly.