EBARA EFQT12 - Manual (Page 28)

EBARA Fluid Handling 27
Impeller Shaft and Bearing Disassembly
Disconnect the discharge adaptor (16) from the
piping system by removing the attaching hardware.
If additional clearance in required, remove the cap
screws (13), lock washers (14), and hex nuts (15)
securing the discharge adaptor and gasket (19) to
the pump casing (1).
Remove the cap screws (41), lock washers (42),
and flat washers (85) securing the sight gauge
brackets to the pedestal. Inspect the sight gauge
(84) and attaching parts for leaks or cracks.
Support the pump casing using a suitable hoist
and remove the remaining cap screws (41) ant
lock washer (42). Separate the casing from the
pedestal assembly (39).
Remove the pump casing O-ring (22) and inspect
for damage.
Install a lifting eye bolt in the 5/8-11 UNC tapped
hole located on top of the pedestal. Tighten the
eye bolt completely until the threads bottom out.
Remove the foundation mounting hardware from
the pedestal feet. Tie and tag any shims used
under the pedestal.
Separate the pedestal assembly from the power
source. Retain the shaft key (29).
WARNING!
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed to
facilitate removal or installation of
individual components only. Additional
weight may result in damage to the pump
or failure of the eye bolt.
Separate the seal plate from the pedestal by
removing cap screws (23) and lock washers (24).
Remove the pedestal O-ring (43) and seal plate
O-ring (63).
Before opening the pedestal cavity, drain the oil
by removing the pedestal drain plug (38). Clean
and reinstall the plug.
Remove the bearing cap (31) and wave washer (27)
and inspect the bearing cap O-ring (33) for damage.
Press the oil seal (28) out of the cap, if required.
Place a block of wood against the impeller end of
the shaft and drive the shaft and bearings from the
pedestal bore.
Use a bearing puller to remove the inboard bearing
(40) and outboard bearing (32) from the impeller
shaft.
Press the inboard oil seal (18) from the pedestal
bore if badly worn.
Impeller Shaft and Bearing Reassembly
Clean the bore of the pedestal and seal plate, as
well as the shaft and component parts with a cloth
soaked in cleaning solvent. Inspect the parts for
wear and replace as necessary.
WARNING!
Most cleaning solvents are toxic and flammable.
Use them only in a well-ventilated area free from
excessive heat, sparks, and flame. Read and
follow all precautions printed on solvent
containers.
NOTE!
Be sure the oil return grooves provided under
the bearings are clean and free of dirt.
Soak the bearings in cleaning solvent free of grit or
metallic particles. Inspect the bearings and replace
as necessary.
Position the inboard bearings (40) onto the shaft so
that the largest shoulder of the outer race faces
toward the impeller. Press the bearing on until it
seats squarely against the shaft shoulder.
Press the outboard bearings (32) onto the shaft until
it is fully seated.
Press the shaft and assembled bearings into
pedestal bore until the inboard bearing seats
squarely against the pedestal shoulder.