90R030 90R042 Danfoss Series 90 Pump Seal Kit

Product Overview

The 90R030, 90R042, 90R55, 90R100, 90R180 and 90R250 are dedicated seal kits (repair kits) for Danfoss (formerly Sauer-Danfoss) Series 90 axial piston variable displacement pumps. These kits include shaft seals, O-rings, piston rings and related sealing components, engineered for exact interchangeability with original Series 90 units. Every kit undergoes strict dimensional matching and 100% simulated operating condition testing to restore sealing performance, reduce internal leakage and extend pump service life. Ideal for maintenance and overhaul of construction, agricultural and industrial hydraulic systems.

Technical Specifications

• Models: 90R030, 90R042, 90R55, 90R100, 90R180, 90R250
• Compatible product: Danfoss Series 90 axial piston variable pumps
• Contents: Shaft lip seal, O-rings, piston rings and related sealing components (complete repair kit)
• Seal material: NBR or high-performance elastomer (per original configuration)
• Compatible displacements: 30 cc, 42 cc, 55 cc, 100 cc, 180 cc, 250 cc etc.
• Working pressure range: Matches Series 90 pump rated pressure (system pressures up to approx. 450 bar)
• Test standards: Compliant with original dimensional and ISO-related sealing performance tests

Key Technical Advantages

• Precise drop-in interchangeability: Manufactured to exact Danfoss Series 90 original dimensions and material specifications for perfect fit with pump housing, shaft and servo components, restoring factory sealing performance after installation.
• High-wear-resistant seal materials: Premium NBR or reinforced elastomers offer excellent oil resistance, abrasion resistance and extrusion resistance for high-pressure, high-speed operation.
• Complete repair kit design: Includes all critical seals (shaft seal, O-rings, piston rings etc.) so a single replacement addresses major leakage points, reducing maintenance cost and downtime.
• Rigorous quality control: Every kit is dimensionally inspected and validated under simulated operating conditions to ensure long-term reliability under vibration, temperature fluctuations and high pressure.

Application Areas

Construction machinery (excavators, loaders), agricultural machinery, road machinery, material handling equipment, injection molding machines, and industrial hydraulic systems using Danfoss Series 90 pumps. Especially suitable for OEM equipment maintenance and rapid field overhauls.

Expert Maintenance Tips

Thoroughly clean the pump interior and related components before installation to prevent contamination. Install the shaft seal and O-rings according to original torque values and orientation (note seal lip direction). Perform a low-pressure test run after reassembly and check for leakage. Use clean hydraulic fluid meeting original specifications and maintain proper system filtration. Regularly inspect shaft and housing seals to avoid early failure from over-pressure or contamination. Replace related seals as a complete set for optimal sealing performance.