Gorman-Rupp Pumps 68A2-B 818301 and up - Manual (Page 25)

60 SERIES OM−01467
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, lock out or
disconnect the power source 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 man-
ual.
2. Lock out or disconnect the power
source to ensure that the pump will
remain inoperative.
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.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam-
age to equipment. Suction and dis-
charge hoses and piping must be re-
moved from the pump before lifting.
Suction Head Removal
Before attempting to service the pump, remove the
pump casing drain plug (42) and drain the pump.
Clean and reinstall the drain plug.
Remove the suction piping. Support the pump cas-
ing with a sling and suitable lifting device or wood
blocks before attempting to remove the suction
head.
Remove the hardware (47, 48 and 53) and remove
the casing support (45) (51) from the pump casing
(1). Pry the suction head out of the pump casing
and remove the suction head gasket (55).
Impeller Removal
Before removing the impeller, screw the cross arm
on the automatic lubricating grease cup (9) clock-
wise until it rests against the cover (see Figure 4) to
prevent the grease in the cup from escaping.
Immobilize the impeller by wedging a block wood
between the vanes. If removed, install the shaft
key (23). Install a lathe dog on the drive end of the
shaft (26) with the V" notch positioned over the
shaft keyway.
With the impeller rotation still blocked, strike the
lathe dog sharply in a counterclockwise direction
(when facing the drive end of the shaft). The impel-
ler may also be loosened by using a long piece of
heavy bar stock to pry against the arm of the lathe