Gorman-Rupp Pumps VG1 1/4B3-B 1260463 and up - Manual (Page 28)

OM−03289 VG SERIES
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
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.
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.
Impeller Removal
For access to the impeller (2) or seal assembly (3),
the pump casing (1) must be separated from the
seal plate (11).
Drain the suction and discharge piping and re-
move it from the pump. Remove the casing drain
plug (46) and drain the pump. Clean and reinstall
the drain plug.
Remove the hardware securing the pump casing
to the base. Wedge a block of wood under the
bearing housing (21) to support the housing when
the casing is removed.
Remove the hardware (12 and 14) and separate
the pump casing from the seal plate. Tie and tag
any leveling shims used under the casing mount-
ing feet. Remove the seal plate gasket (10) and
clean the mating surfaces.
Immobilize the shaft (32). Remove the impeller nut
(47) and use a soft-faced mallet to tap the impeller
from the shaft. Retain the impeller key (48). Inspect
the impeller and replace it if cracked or badly worn.
Seal Removal
To remove the seal assembly (3), disengage the
nuts (16) and slide the seal plate (11), seal and
shaft sleeve (4) off the shaft as a single unit. Re-
move the shaft sleeve O-ring (5).
Disengage the nuts (44) and remove the seal cap
(45) and gasket (8). Remove the stationary ele-
ment and O-ring from the seal cap. Pull the sleeve
and rotating portion of the seal from the seal plate.