Massey Ferguson 3539858M91 Power Steering Pump Assembly

The 3539858M91 is an external gear type hydraulic power steering pump designed for agricultural tractor applications. It features a displacement of 11 cc per revolution with left-hand counterclockwise rotation and a tapered shaft interface. The pump delivers a maximum flow rate of 28.7 LPM at rated speed with a pressure relief setting of 1100 PSI. Constructed with aluminum housing for weight reduction and corrosion resistance, it serves as a direct replacement for OEM part numbers 1825210M91 and 3546160M91 across multiple tractor platforms. Cross-reference interchange includes Turolla SNP2/11SC001, 5S1/40047MF, and 20A11X506AF designations. The unit weighs approximately 8 kg and is compatible with a wide range of Massey Ferguson 100, 200, 300 series tractors as well as Landini Series 30, 40, 50, 60, 70 and CF models. Seal kits are available for field maintenance.