Yanmar SV100 SV100-1 SV100-1A AP2D36LV3RS6-854-1 hydraulic pump for mini excavator
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1. GENERAL IDENTIFICATION
Machine Models: Yanmar SV100, SV100-1, SV100-1A
OEM Manufacturer: Uchida-Rexroth (Japan)
OEM Model Series: AP2D36LV3RS6-854-1
Yanmar Part Numbers: 172499-73100, 172499-71200
Pump Type: Tandem Axial Piston Pump + Integrated Gear Pump
2. PERFORMANCE SPECIFICATIONS
Displacement (Main P1 & P2): 36.0 cc/rev x 2
Displacement (Pilot/P3): Approx. 10.0 - 12.0 cc/rev
Rated Flow: Approx. 81.0 L/min x 2 (at 2250 RPM)
Maximum Operating Pressure: 32.0 MPa (4,641 PSI)
Control Logic: Total Horsepower Control (Load Sensing)
3. MECHANICAL INTERFACE
Input Shaft: Splined shaft (Typically 13 or 15 teeth; verify against flywheel coupling).
Mounting Flange: Standardized 2-bolt or 4-bolt SAE type mount.
Ports: * Suction: Single large inlet for hydraulic tank feed.
Delivery: Dual high-pressure outlets for main control valve.
Case Drain: Low-pressure return for internal cooling/lubrication.
4. INTERNAL REPAIR COMPONENTS (ROTARY GROUP)
Cylinder Blocks: Bi-metal design for high-pressure durability.
Pistons: 9-piston set per side (18 total).
Valve Plates: Precision-ground timing plates (Left and Right specific).
Cradle/Swash Plate: Angle-variable assembly for flow control.
Seal Kit: High-pressure Viton shaft seals and housing O-rings.
5. FACTORY PRESSURE SETTINGS
Main Relief Pressure: 32.0 MPa
Pilot Control Pressure: 3.9 MPa
LS (Load Sensing) Differential: 1.5 - 2.0 MPa
Unloading Pressure: 3.0 - 4.5 MPa
6. INSTALLATION & COMMISSIONING PROTOCOL
Case Priming: MANDATORY. Fill the pump housing with 1.5 liters of clean hydraulic oil before starting the engine.
System Flushing: If the previous pump failed, the oil cooler and all hydraulic lines must be professionally flushed to remove metal debris.
Filtration: Replace the main return filter and the pilot line filter. Clean the magnetic suction strainer in the tank.
Air Bleeding: Run the engine at low idle for 10 minutes and cycle all cylinders to full stroke several times to purge air.