JACK, HYDRAULIC, TRIPOD, TYPE B-5
PART NO. 50K25177 NSN 1730-00-516-2018 EIC: NA
OPERATOR CONTROLS AND INDICATORS
Air Vent Assembly
The air vent assembly, is provided to establish a zero pressure condition
in the reservoir during operation of the pump assembly, permitting a free
Āow of oil. The air vent must be closed when the jack is not in use to
prevent oil leakage and contamination of the oil by dirt and moisture.
The release valve controls the return Āow of oil from the cylinder and ram
assembly. The release valve must be closed to raise the ram. Opening
the release valve allows oil to Āow from the cylinder to the reservoir,
causing the ram to lower.
The handle, is actuated to give the pump piston the necessary recipro-
cating action required to force oil into the cylinder and raise the ram.