A4VG28 Hydraulic Pump Cradle Bearing

Bearing Geometry: Precisely machined crescent arc to match standard hydraulic swashplates.
Surface Treatment: Advanced anti-friction polymer or specialized composite metal overlay for dry/boundary lubrication conditions.
Application Focus: Designed specifically for high-pressure hydraulic piston pumps.

Product Overview:The A4VG28 is a highly specialized crescent (or cradle) bearing, critical for the function of variable displacement axial piston pumps. It provides the exact low-friction sliding surface required for the swashplate to adjust the pump's hydraulic flow and pressure. In fluid power applications, even microscopic deviations can lead to catastrophic system failure. Our dedicated assembly and inspection team meticulously verifies the exact arc radius and surface finish of every A4VG28 bearing, ensuring it delivers OEM-equivalent performance for hydraulic repair professionals.

OEM & Customization Services:DBS provides discreet, high-quality white-labeling for hydraulic rebuilders. We can laser-mark your internal part numbers on the non-working surfaces and package them in custom anti-static bags to ensure absolute cleanliness prior to pump assembly.
FAQ:

Q: Is this a direct replacement for OE hydraulic pump bearings?A: Yes, the dimensional tolerances and arc geometry are meticulously matched to serve as a direct drop-in replacement for major pump brands.
Q: How does the composite surface benefit the pump?A: The specialized sliding surface prevents metal-to-metal galling during high-pressure swashplate adjustments, extending the pump's lifespan.
Q: Can you supply other components for the A4VG series?A: As a comprehensive B2B supplier, we can source and kit various internal pump components upon request.