MCY & YCY Axial Piston Pump | 10MCY14-1B 63YCY14-1B 160YCY14-1G

The MCY14-1B (Fixed Displacement) and YCY14-1B (Pressure-Compensated Variable) high-pressure axial piston series manufactured by Chengyuan Hydraulic (widely known in heavy sectors as the classical “14-1B” heavy hydraulic/fuel pump platform) are premium fluid power displacement units built to cross-reference the heavy-duty operational demands of metallurgical milling, metal forming machinery, and industrial fuel-delivery infrastructure. Leveraging a swashplate configuration with a rotating cylinder barrel and standard face valve plate architecture, this series is globally recognized for its industrial structural resilience. Focus on the core part combinations provided—5MCY14-1B, 10MCY14-1B, 10YCY14-1B, 63YCY14-1B, 80YCY14-1B, and the hyper-duty upgraded 160YCY14-1G—Chengyuan applies precise micron-clearance matching along the plunger bore junctions and employs bimetallic vacuum-sintered distribution faces. This meticulous execution guarantees 100% original-place interchangeable plug-and-play compatibility for all legacy standard mount configurations, shaft keys, and port sizes while sustaining a continuous high-pressure threshold of 31.5 MPa (315 bar). Prior to leaving our manufacturing bays, every pump assembly undergoes rigorous 100% simulated full-load dynamic volumetric evaluation, continuous thermal duration testing, and overload pressure shock audits, securing structural stability across harsh processing zones.

Technical Specifications :

• Standard Manufacturing Matrix: Equivalent to Classic 14-1B High-Pressure Piston Pump Architecture

• Target Model Nomenclatures Covered: 5MCY14-1B, 10MCY14-1B, 10YCY14-1B, 63YCY14-1B, 80YCY14-1B, 160YCY14-1G

• Control Execution Method Distinctions:

  • MCY Series Suffix (e.g., 5MCY, 10MCY): Fixed displacement axial piston profile (Fixed swashplate angle)

  • YCY Series Suffix (e.g., 10YCY, 63YCY, 80YCY, 160YCY): Pressure-compensated variable displacement platform (Integrates an onboard adjustment valve that shifts swashplate angle to zero flow at preset cutoff points)

• Volumetric Geometric Displacements Matrix:

  • Size 5 Configuration: 5.0 $cm^3/rev$

  • Size 10 Configuration: 10.0 $cm^3/rev$

  • Size 63 Configuration: 63.0 $cm^3/rev$

  • Size 80 Configuration: 80.0 $cm^3/rev$

  • Size 160 Configuration: 160.0 $cm^3/rev$

• Nominal Continuous Working Pressure: 31.5 MPa (315 bar / 4560 PSI)

• Maximum Peak Intermittent Pressure Boundary: 40.0 MPa (400 bar / 5800 PSI)

• Rotational Drive Velocity Tolerances: Rated velocity at 1500 rpm (Optimized for 4-pole industrial electric prime movers); peak maximum continuous rating at 2000 rpm

• Design Modification Code Reference: -1B represents standard heavy industrial series; -1G denotes high-load modification featuring advanced alloy coating on swashplate-slipper contact zones

• Allowable Operating Fluid Viscosity: Standard mineral-based hydraulic oils; customizable under down-rated velocities for low-viscosity light heavy oil, fuel lubrication oil, and crude injection carrier mediums

Key Technical Advantages:

• Bimetallic Sintered Valve Plate with Vacuum-Cryo Stress Relief: The core friction surface of the 14-1B architecture couples the cylinder face directly to the valve distribution plate. Chengyuan utilizes an advanced steel-backed high-lead bronze bimetallic sintered matrix subjected to multi-stage sub-zero cryogenic thermal stabilization. This ensures high structural resistance to localized friction-induced burning or micro-spalling under continuous 31.5 MPa loading.

• Hydrostatically Balanced Plunger Slipper Shoe Interface: Each piston head is secured to a precision-forged alloy slipper shoe. A micro-drilled axial channel running through the plunger core channels high-pressure fluid directly beneath the shoe pad, establishing a micron-inch hydrostatic fluid barrier against the swashplate. This replaces metal-to-metal friction with seamless fluid shearing, maintaining a consistent volumetric efficiency curve above 94%.

• Rapid-Response YCY Pressure Cutoff Compensator Mechanics: The variable YCY configurations incorporate a high-stiffness spring-loaded positioning piston network. When total circuit resistance matches the pre-calibrated cut-off limit, the internal compensator shifts the swashplate position toward a concentric angle within milliseconds. Output delivery drops to near-zero flow, switching the pump into a low-heat holding mode that reduces total motor draw by 25-45%.

• Heavy-Wall Shock-Absorbing Ductile Iron Monoblock Housing: Unlike lightweight alternative aluminum enclosures, the 14-1B series utilizes a solid casting produced from high-tensile ductile iron. The dense physical structure provides superior acoustic and mechanical vibration dampening, absorbing multi-piston fluid pulse resonance. It resists case breathing or hairline fractures even during rapid hydraulic directional shock loading.

Application Areas:

• Heavy Forging Presses & Metal-Forming Machine Tools: Primary high-pressure hydraulic drive source for 400-ton to 1000-ton hydraulic stampers, industrial scrap metal balers, and high-load extrusion shears.

• High-Duty Metallurgical & Steel Milling Lines: Blast furnace top charging systems, steel slab pushers, and high-frequency reversing manifold networks requiring reliable high-pressure holding capability.

• Industrial Fuel Oil Injection & Bulk Transfer Pump Stations: High-pressure booster systems supplying heavy industrial kilns, cement thermal plants, and marine steam boiler burner manifolds with atomized fuel oil.

Expert Maintenance Tips:

• The Case Drain Port Must Direct-Route to Tank with Case Pressure Strictly Below 0.1 MPa: This is the single most critical plumbing directive for 14-1B piston pumps! The housing drain line located on the top side of the pump must be plumbed independently back to the reservoir. Never join this line with main return paths or other valve drains. The line diameter must be unrestricted—do not install filters or check valves along this line. High case backpressure will immediately blow out the front shaft lip-seal and can cause the plunger slipper shoes to dislodge from their sockets, resulting in catastrophic catastrophic mechanical internal failure.

• The Pump Housing Must Be Fully Saturated with Fluid Prior to Motor Startup: Piston pumps shipped from the factory or left idle for extended periods retain dry internal cavities. Before first-time initialization, you must manually pre-fill the entire pump housing with clean hydraulic fluid/oil through the upper case drain port until it overflows, then rotate the input shaft by hand at least 3 revolutions. Initiating motor drive with a dry case will score the slipper-swashplate and cylinder-valve plate boundaries within seconds, destroying the close-tolerance matching surfaces.

• Enforce Strict Contamination Control and Limit Suction Vacuum to Stop Cavitation Pitting: The internal plunger-to-bore matching clearance is restricted to a tight 5-8 microns. Equip circuits with absolute $\le 10$-micron filtration lines. Avoid downsizing intake plumbing (e.g., the 63YCY requires a minimum 50mm intake ID) and maintain an intake lift height under 500mm to prevent severe vacuum drops. Allowing particulate contamination or cavitation air bubbles into the pump will erode the valve plate and slippers, triggering high-pitched metallic shrieking and sudden pressure drops.