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Packing nut confusion

Discussion in 'Commercial Snow Removal' started by steve/maine, Jan 7, 2014.

  1. steve/maine

    steve/maine Junior Member
    from maine
    Messages: 7

    How can I tell if my rams have an NPT or o ring packing nut? Should I be able to see threads or o ring for each? Fisher plow schematics do not give part number specific to my MM2 8' HD.
  2. framer1901

    framer1901 Senior Member
    Messages: 852

    Is there a hose connected to the ram? If so disconnect it and look at the fitting.

    NPT is pipe thread - tapered, should have teflon tape or pipe dope on it to help seal the connection

    O Ring is a square tap (not tapered) and there will be an O ring on the fitting itself.

    This really means nothing but all the rams we have, Boss, Meyer, Danials and bought ones have a pipe thread.