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 stage, split case centrifugal pump having a capacity of 300
c. Maintenance and Adjustment. The pump is designed
8pm at 100 psi. The pump is driven by a 25-hp electric
with a packing gland that must leak water slowly when the
motor. Construction of pump is such that it makes a suction
pump is running to provide lubrication between shaft and
on both sides of the impeller and discharges out through the
pump packing. Should the packing leak excessively, the
center of the impeller.
leakage may be slowed by tightening the packing gland while
the pump is running. Tighten only enough to bring the
b. Pump. The pump is fitted with a ball bearing on the
leakage to a slow drip. Do not stop the leakage entirely.
extreme ends of the pump frame and with adjustable packing
glands on inboard ends where the pump shaft extends
d Removal.
through the pump casing. Replaceable wearing rings are
(1) To remove bearing, disconnect motor coupling (fig.
installed on the pump impeller. These wearing rings are
replaced when the efficiency of the pump decreases and the
bearing is to be removed. If thrust end bearing is to be
pump no longer delivers water at its rated capacity.
removed pump will not have to be moved.
5-98
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