Gorman-Rupp Pumps 3D-E1.5 1P 883504 and up - Manual (Page 14)

OM-03604 D SERIES
OPERATION PAGE C - 2
Leakage Check
No leakage should be visible at pump mating sur­
faces, connections or fittings. Keep all line connec­
tions and fittings tight to maintain maximum pump
efficiency.
Strainer Check
If a suction strainer has been installed, check and
clean it as necessary. It should be cleaned if pump
flow begins to drop. If a vacuum suction gauge has
been installed, monitor and record the readings
regularly to detect strainer blockage.
Accumulator Chamber Check
Check periodically to ensure that there is sufficient
air in the integral suction accumulator chamber.
Replenish as required (see Fixed, Rigid Piping in
Section B for details).
STOPPING
After stopping the pump, lock out and tag out in­
coming power to the motor to ensure that the
pump will remain inoperative.
If the pump will be idle for more than a few hours, or
if it has been pumping liquids containing a large
amount of solids, flush it with clean water.
Cold Weather Preservation
The primary construction materials of this
pump are aluminum, with neoprene flap
valves and a DuraBlue 1000
t diaphragm.
Do not attempt to clean or flush this pump
with any liquid which would attack pump
fittings or components. Avoid cleaning
with cleaning solvent.
In below freezing conditions, drain the water from
the pump and the lines when the pump is not in op­
eration. Also, clean out any solids by flushing with a
hose.
GEARBOX TEMPERATURE CHECK
The gearbox runs higher than ambient tempera­
tures because of heat generated by friction. Tem­
peratures of approximately 200
_
F (93
_
C) are con­
sidered normal, and can operate intermittently at
250
_
F (121
_
C).
Checking gearbox temperatures by hand is inac­
curate. Place a contact‐type thermometer against
the housing and record this temperature for future
reference.
A sudden increase in gearbox temperature is a
warning that the bearings are at the point of failing.
Make certain that the bearing lubricant is of the
proper viscosity and at the correct level (see LU­
BRICATION in Section E). Bearing overheating
can also be caused by shaft misalignment and/or
excessive vibration.
When pumps are first started, the bearings may
seem to run at temperatures above normal. Con­
tinued operation should bring the temperatures
down to normal levels.