Gorman-Rupp Pumps 66B3-B 407277 and up - Manual (Page 25)

60 SERIES OM−01459
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. Disconnect or lock out 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 Head and Wear Ring Removal
The impeller (2), wear ring (25) and seal (3) are
easily accessible by removing the suction head
(32).
Remove the casing drain plug (23) and drain the
pump. Clean and reinstall the drain plug.
Remove the nuts (35) and tighten the two screws
(30) to jack" the suction head out of the pump cas-
ing (1). Remove the suction head gasket (36).
Inspect the wear ring for excessive wear or scoring.
If replacement is required, use a small bit to drill
three holes, 120
_ apart, horizontally through the
wear ring. Use a chisel or other suitable tool to
complete the cuts. Use caution not to damage the
suction head bore. Remove the wear ring sectons
from the suction head.
Impeller Removal
Disengage the hardware (26 and 27) and remove
the impeller nut and O-ring (28 and 29). Install two
3/8−16 UNC−2B capscrews (not supplied) in the
tapped holes in the impeller (2) and use a suitable
puller and the capscrews to pull the impeller off the
shaft. Retain the impeller key (31). Remove the
capscrews from the impeller.
Slide the impeller adjusting shims (16) off the shaft.
Tie and tag the shims or measure and record their
thickness for ease of reassembly.