Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 160
t more than one inch, unscrew the glandand put in a new packing of lamp wick braided and well oiledwith mineral oil, which is free from gum. Afterwards put thesocket back to its former place and tighten the set screw. When the pump valve leaks the lever can be worked upand down without raising the… … Fia. 139. Sometimes the jack will become air bound by reason of theaccumulation of dirt around the filling plug; this must beremoved before the jack will work. Sometimes the liquid willall have been displaced before the ram is half way up, in thisemergency the reservoir must be refilled. It often…
Hydraulic machinery · Pumping machinery
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