Gorman-Rupp Pumps VG5C3-B 1188885 and up - Manual (Page 25)

OM-02816 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.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi­
cient capacity and that they are posi­
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Impeller Removal
For access to the impeller (2) or seal assembly (3),
the pump casing (1) must be separated from the
seal plate (6).
Drain the suction and discharge piping and re­
move it from the pump. Remove the casing drain
plug (47) 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 (20) to support the housing when
the casing is removed.
Remove the nuts (12) and separate the pump cas­
ing from the seal plate. Tie and tag any leveling
shims used under the casing mounting feet. Re­
move the seal plate gasket (5) and clean the mat­
ing surfaces.
Immobilize the shaft (32). Remove the impeller nut
(48) and use a soft‐faced mallet to tap the impeller
from the shaft. Retain the impeller key (49). Inspect
the impeller and replace it if cracked or badly worn.