One, USED, refurbished, power steering hand pump assembly (torque generator) for Farmall 504, 2504 or International Harvester 404, 2404 tractors if you have the IH four port power steering unit originally supplied to IH by Char Lynn. This assembly is the hydraulic power steering unit (torque generator) 382924r91 that you will find in those models associated parts books. This unit fits under the dash and is the hydraulic assist for your steering. This unit will NOT work in place of the two port torque generator. The unit was a used take-off that was disassembled, inspected for wear and damage, cleaned and reassembled with new O-rings, bearings and end cap parts. The end cap assembly has been rebuilt to the late model R91 specs with the upgraded roller bearing. This unit is ready to mount and go and will come with a new steering shaft nut. Check your parts manual or contact me if you have questions or concerns. IH part number for this complete four port power steering assembly is 382924r91. As you may already know, this assembly is no longer available from CNH or CHAR LYNN as it was discontinued many years ago. Back in the day, this unit would list for over $1400 from IH. If you have a failed unit like this one from one of these tractors, contact me for a possible core return discount of up to $150 back to your Pay Pal account upon receipt of a "rebuildable" core. Free domestic shipping to US 48 states.