مضخة هيدروليكية KYB PSVD2-17E B0600-16023 لـ حفارة صغيرة Yanmar VIO50-6A VIO50-6B VIO57-6A VIO57-6B OEM

TECHNICAL DATA SHEET: YANMAR ViO50-6 / ViO57-6 HYDRAULIC PUMP
1. GENERAL IDENTIFICATION

Machine Models: Yanmar ViO50-6A, ViO50-6B, ViO57-6A, ViO57-6B

Yanmar Part Numbers: 172B05-73120, 172B05-73100, 172B05-73101

OEM Manufacturer: KYB (Kayaba)

OEM Model Series: PSVD2-17E-19 / PSVD2-17E-21

Configuration: 2 x Variable Piston Pumps + 2 x Gear Pumps (Integrated Quad-Output)

2. PERFORMANCE SPECIFICATIONS

Piston Pump Displacement (P1 & P2): 17.4 cc/rev x 2

Gear Pump Displacement (P3 & P4): 12.3 cc/rev (Sub-pump) + 4.2 cc/rev (Pilot)

Rated Operating Pressure: 24.5 MPa (3,553 PSI)

Maximum Relief Pressure: 27.0 MPa (3,916 PSI)

Rated Flow (Total): Approx. 38.3 x 2 + 27.1 + 9.2 L/min (@ 2200 RPM)

Control System: Hydraulic Pressure Constant / Load Sensing Compatible

3. MECHANICAL INTERFACE

Input Shaft: High-tensile splined shaft (Typically 13-tooth or 15-tooth).

Mounting Flange: SAE Standard 2-bolt mount.

Ports:

Suction: Single large inlet for hydraulic tank supply.

Delivery: Multiple high-pressure outlets for main control valve and pilot circuits.

Case Drain: Essential return-to-tank line for internal lubrication.

4. INTERNAL REPAIR COMPONENTS (ROTARY GROUP)

Cylinder Blocks: Precision rotating barrels for P1 and P2 sections.

Piston Sets: High-strength pistons with specialized shoes for the PSVD series.

Valve Plates: Specific porting for high-speed delivery and noise reduction.

Swash Plate & Cradle: Internal assembly for variable flow control.

Seal Kit: High-pressure Viton shaft seal and specialized O-rings.

5. FACTORY PRESSURE SETTINGS

Main Relief (Boom/Arm/Bucket): 24.5 MPa

Travel Relief Pressure: 24.5 MPa

Pilot Control Pressure: 3.7 - 4.0 MPa

Gear Pump (P3) Relief: 21.0 MPa (Blade/Swing circuits)

6. INSTALLATION & COMMISSIONING PROTOCOL

Case Priming: MANDATORY. Fill the pump housing with clean hydraulic oil through the top-most drain port before starting the engine.

Air Bleeding: Loosen the air bleed plug on top of the pump until oil flows without bubbles.

System Flushing: If the old pump suffered a mechanical failure, the oil cooler and tank must be cleaned to remove metal debris.

Filtration: Replace the main return filter and the pilot line filter. Clean the magnetic suction strainer in the tank.