EBARA EFQT12 - Manual (Page 26)

EBARA Fluid Handling 25
WARNING!
Use lifting and moving equipment in good
repair and with adequate capacity to prevent
injuries to personnel or damage to equipment.
Suction Check Valve Disassembly
(Figure 1)
Remove the pump casing drain plug (45) and drain
the pump. Clean and reinstall the drain plug.
For access to the flap valve, loosen the cover
clamp screws (9) and remove the cover clamps
(7). Remove the clean out cover (5) and gasket (6).
Reach through the access opening and remove the
cap screws (75), lock washer (80) and pivot caps
(78) which secure the flap valve assembly (81).
Remove the flap valve thorough the access
opening.
Inspect the flap valve for wear or damage. Remove
the four stainless steel flat washers (77) from the
pivot arm. Tie and tag the washers for future
reference.
If the check valve body (79) must be removed,
disconnect the suction flange hardware and loosen
the “Victaulic” coupling clamp (4). Separate the
valve body from the suction elbow. Inspect the
rubber “Victaulic” gasket for damage.
Pump Disassembly
(Figure 1)
Service to the wear plate (59), impeller (2), or seal
assembly (3) may be accomplished from either
side of the pump casing (1). The following
instructions are based on service from the suction
side.
Install a lifting eye bolt in the 5/8-11 UNC tapped
located in the suction elbow. Tighten the eye bolt
completely until the threads bottom out.
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 Figure 1) 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.
WARNING!
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.