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MODELS 341A-342A-344A
2
grease is recommended as lubricants for pumps operating in
both wet and dry locations. Mixing of different brands of grease
should be avoided due to possible chemical reactions between
the brands which could damage the bearings. Accordingly,
avoid grease of vegetable or animal base which can develop
acids, as well as grease containing rosin, graphite, talc and
other impurities. Under no circumstances should used grease
be reused.
Over lubrication should be avoided as it may result in overheat-
ing and possible bearing failure. Under normal application, ade-
quate lubrication is assured if the amount of grease is main-
tained at 1/3 to 1/2 the capacity of the bearing and adjacent
space surrounding it.
In dry locations, each bearing will need lubrication at least
every 600 hours of running time or every 6 to 12 months,
whichever is more frequent. In wet locations the bearings
should be lubricated at least after every 300 hours of running
time or every 4 to 6 months, whichever is more frequent. A unit
is considered to be installed in a wet location if the pump and
motor are exposed to dripping water, to the weather, or to heavy
condensation such as is found in unheated and poorly ventilated
underground locations.
Oil lubricated bearings are optional on MODEL 344 pumps. A
fixed oil level is maintained with the power frame by an oiler
which allows visual indications of reserve oil.
At initial installation and before starting a unit that has been
shut down for repairs or for any extended length of time, run
enough 10W-30 weight motor oil through the oiler to maintain a
constant oil level to insure that the bearing will never be with-
out an oil supply. Oil will have to be added at intervals to main-
tain a constant level in the oiler. This interval can only be deter-
mined by experience.
Under working conditions, oil will breakdown and need to be
replaced at regular intervals. The length of these intervals will
depend on many factors. Under normal operation, in clean and
dry locations, the oil should be changed about once a year.
However, when the pump is exposed to dirt contamination, high
temperatures (200°F. or above) or a wet location, the oil may
have to be changed every 2 to 3 months.
Use normal fire caution procedures when using any
petroleum cleaner.
REPAIRS
Before starting any work, insure the electrical power is locked
out, the system pressure has been lowered to 0 psi and tempera-
ture of the unit is at a safe level.
The pump may be disassembled using the illustrations and text
provided. Although complete disassembly is covered, it will sel-
dom be necessary to completely disassemble your Aurora
pump.
The illustrations accompanying the disassembly instructions
show the pump at various stages of disassembly. The illustra-
tions are intended to aid in the correct identification of the parts
mentioned in the text.
Inspect removed parts at disassembly to determine if they can
be reused. Ball bearings that turn roughly or show wear should
be replaced. Cracked castings should never be reused. Scored or
worn pump shafts should be replaced. Gaskets should be
replaced at reassembly simply as a matter of economy. They are
much less expensive to replace routinely than to replace singly
as the need arises.
CAUTION
A. Assembled Units.
Model 342A
Model 341A
Model 344A
Warning: Sudden Start-Up Hazard
Disconnect and lockout power source before servicing.
Failure to follow these instructions could result in serious
personal injury, death or property damage.
Warning: Hot Surface Hazard
If pumping hot water, insure guards or proper insulation is
installed to protect against skin contact to hot piping or
pump components. Failure to follow these instructions could
result in serious personal injury, death or property damage.
Warning: High Pressure Hazard
The pump is rated at a maximum of 175 psi at 150°F. Do
not exceed this pressure. Install properly sized pressure
relief valves in system. Failure to follow these instructions
could result in serious personal injury, death or property
damage.
Warning: Spraying Water Hazard
When servicing pump replace all gaskets and seals. Do not
re-use old gaskets or seals. Failure to follow these instruc-
tions could result in serious personal injury, death or proper-
ty damage.