EBARA EFQT3 - Manual (Page 27)

EBARA Fluid Handling 27
PUMP AND SEAL DISASSEMBLY AND
REASSEMBLY
Review all SAFETY Information in Section A.
Follow the instructions on all tags, label and
decals attached to the pump.
This pump requires little service due to its
rugged, minimum-maintenance design.
However, if it becomes necessary to inspect
or replace the wearing parts, follow these
instructions which are keyed to the sectional
views (see Figures 1 and 2) and the
accompanying parts lists.
Many service functions may be performed
by draining the pump and removing the back
cover assembly. If major repair is required,
the piping and/or power source must be
disconnected. The following instructions
assume complete disassembly is required.
Before attempting to service the pump,
disconnect or lock out the power source and
take precautions to ensure that it will remain
inoperative. Close all valves in the suction
and discharge lines.
For power source disassembly and repair,
consult the literature supplied with the power
source, or contact your local power source
representative.
Before attempting to open or service the
pump:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power
source to ensure that the pump will
remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before opening
any covers, plates, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or
damage to equipment.
Back Cover and Wear Plate Removal
(Figure 1)
The wear plate (16) is easily accessible and
may be serviced by removing the back cover
assembly (23). Before attempting to service
the pump, remove the pump casing drain
plug (17) and drain the pump. Clean and
reinstall the drain plug.
Remove the hand nuts (21) and pull the
back cover and assembled wear plate from
the pump casing (1). Inspected the wear
plate, and replace it if badly scored or worn.
To remove the wear plate, disengage the
hardware (19 and 20).
Inspect the back cover O-ring (18) and
replace it if damaged or worn.
Suction Check Valve Removal
(Figure 1)
If the check valve assembly (11) is to
serviced, remove the check valve pin (32),
reach through the back cover opening and
pull the complete assembly from the suction
flange (3).
NOTE
Further disassembly of the check valve is
not required since it must be replaced as
a complete unit. Individual parts are not
sold separately.
Rotating Assembly Removal
(Figure 2)
The rotating assembly may be serviced
without disconnecting the suction or
discharge piping; however, the power source
must be removed to provide clearance.
WARNING!
WARNING!