Seneca II Hydraulic Pump Brushes and Springs.

Howdy, I'm looking for the part numbers and a source for the hydraulic pump brushes and springs. The service manual describes the inspection procedure, but the parts manual doesn't have the part numbers. Piper tech support is clueless. Anyone have a source?

'77 Seneca II


  • I checked our vendor database (it's on our website!). Does this help?

    Scott Sherer
    Wright Brothers Master Pilot, FAA Commercial Pilot
    Aviation Director, Piper Owner Society Forum Moderator and Pipers Author.

    Need help? Let me know!

  • Sometimes the maint manual lists parts and procedures for things that are no longer routinely done. In this case I think most are sending pumps out for overhaul vs servicing in the field. It may be why you are having challenges sourcing the parts.

    Eric Panning
    1981 Seneca III
    Hillsboro, OR (KHIO)

  • I know you are frustrated by this experience.

    I have had brushes made by Helwig Carbon, from samples, in the past. (not for "aviation" application!)

    Does the manual have length specs? What is wrong with the springs? Unless motor current is passing through them, I would be surprised if they are bad.

    John Schreiber
    A&P, IA, CMEL

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