Gorman-Rupp Pumps 81 1/2P47A-E2 3P 801781 and up - Manual (Page 22)

80 SERIES OM-02164
MAINTENANCE & REPAIR PAGE E - 4
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and de­
cals attached to the pump.
This pump requires little service due to its rugged,
minimum‐maintenance design. However, if it be­
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the sectional view (see Figure 1) and the accompa­
nying parts list.
This manual will alert personnel to known proce­
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per­
sonnel to ensure that only safe, established main­
tenance procedures are used, and that any proce­
dures not addressed in this manual are performed
only after establishing that neither personal safety
nor pump integrity are compromised by such prac­
tices.
Before attempting to service the pump, disconnect
incoming power to the motor and lock it out to en­
sure that it will remain inoperative. Close all valves
in the suction and discharge lines.
For motor disassembly and repair, consult the lit­
erature supplied with the motor, or contact your lo­
cal motor representative.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man­
ual.
2. Disconnect the incoming power to
the motor and lock it out to ensure
that the pump will remain inopera­
tive.
3. Allow the pump to completely 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 cau­
tiously.
7. Drain the pump.
This pump is designed to handle materi­
als which could cause illness or injury
through direct exposure or emitted
fumes. Wear protective clothing, such
as rubber gloves, face mask and rubber
apron, as necessary, before discon­
necting or servicing the pump or piping.
Pump Casing and Vane Plate Removal
Before attempting to service the pump, remove the
pump casing drain plug (25) and drain the pump.
Clean the drain plug and wrap the threads with
PTFE thread tape before reinstallation.
To service the impeller (2), vane plate (17) or seal
assembly (3), disconnect the suction and dis­
charge piping.
Remove the capscrews and nuts (14 and 15) and
self‐tapping screws (6) securing the pump casing
(1) to the intermediate (11). Remove the pump cas­
ing by pulling straight away.
The flow guide (21) rarely requires removal or re­
placement, but if replacement is necessary, disen­
gage the self‐tapping screws. Pull the flow guide
out of the pump casing and remove the O‐ring (20).
Pull the vane plate off of the alignment pins on the
intermediate. Remove the vane plate and casing
O‐rings (5 and 18).
Impeller Removal
Insert a large screwdriver in the slot in the end of
the motor shaft to prevent shaft rotation. Remove
the impeller screw and O‐ring (13 and 16) and pull
the impeller off the shaft; retain the impeller key (4).