Goulds Pumps 4550 - IOM - Manual (Page 22)

COUPLING
Assure that the coupling is properly lubricated if required
by the coupling manufacturer's instructions.
CHECK FOR FREE TURNING
Before pump is started, rotate shaft by hand to be sure it is
free. If pump cannot be turned by hand, or binding or
rubbing is noticed, refer to Installation of Unit in Pit.
Install coupling guard securely before starting the pump
to prevent serious injury.
PRIMING
The pump must be full of liquid with specified
submergence head above centerline of impeller.
PUMP BEARINGS
Pump Bearings - Vertical 4550 Series
1. Upper Ball Type (Pedestal)
All vertical pumps have one ball type thrust bearing
(112) located above the mounting plate. With the
exception of sizes 4x6-10, 2x3-13, 3x4-13, 4x6-13,
6x8-13 and 8x10-15, the bearings are permanently
lubricated sealed bearings, and require no further
lubrication. To lubricate the bearing, shut off the
pump and remove the coupling guard. Remove the
grease vent plug opposite the grease fitting. Inject
grease through the fitting until it appears at the
opposite vent hole. Reinstall the coupling guard and
run the pump until it reaches operating temperature
(approximately 1-2 hours). This will allow excess
grease to purge from the bearing cavity. Shut off the
pump and reinstall the grease vent plug.
2. Lower Sleeve Type
4550 Series vertical pumps have one or more sleeve
type line shaft bearings (197B). The bearings are
nonmetallic and are self-lubricating, but must have
continuous clean liquid injected to flush the bearing
surface to clean and cool the bearing. The various
methods of flushing the bearing (s) are described as
follows:
External Clean Flush - In this arrangement the pump
unit is provided with flush tubing to all the line
bearings through the mounting plate where a
connection is provided for a continuous source of
clean liquid at a rate of 1/4 to 1/2 gpm per bearing
at 10-20 psi. This is the most desirable method of
bearing flush and will offer the greatest bearing life.
From the Pump Discharge - Bearings may be flushed
in this manner when the pumped fluid is clean and
free of solids. The flush tubing can be connected to
the discharge pipe to provide the lubricating and
cooling.
Cyclone Separator - When it is impossible to use an
external clean flush and the pumped fluid is not
clean, a cyclone separator may be used. The flush
tubing is run from the pump discharge to the cyclone
separator mounted on top of the mounting plate. The
clean fluid out of the separator is run to the line
bearings, and solids are returned back into the sump.
This method will prolong bearing life, but eventual
clogging of bearings must be expected, due to solid
buildup. Clean external flush is the best bearing flush
method.
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CAUTION
Regardless of the method of bearing flush, the flush
system must be checked periodically to insure fluid
is being supplied to all the line bearings to prevent
damage to the pump.
OPERATION
s
! WARNING
Check motor rotation before coupling motor to
pump. Refer to Rotation Check for instructions.
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CAUTION
Serious damage may result if pump is run in the
wrong rotation.
START-UP PROCEDURE
Before the pump is started, turn pump by hand at the
coupling to insure it is free and does not rub or bind, and
reinstall the coupling guard. Turn on the flush to the
steady bearings if provided from an external source.
Inspect the pump casing to be sure it is submerged before
engaging the motor.
18
4550 IOM 5/08