Gorman-Rupp Pumps VG8D3-B 1221466 and up - Manual (Page 24)

OM-02819 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.
As described on the following pages, this manual
will alert personnel to known procedures which re­
quire special attention, to those which could dam­
age equipment, and to those which could be dan­
gerous to personnel. However, this manual cannot
possibly anticipate and provide detailed precau­
tions for every situation that might occur during
maintenance of the unit. Therefore, it is the respon­
sibility of the owner/maintenance personnel to en­
sure that only safe, established maintenance pro­
cedures are used, and that any procedures not ad­
dressed in this manual are performed only after es­
tablishing that neither personal safety nor pump in­
tegrity are compromised by such practices.
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 (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.
Seal Removal
To remove the seal assembly (3), disengage the
nuts (15) and slide the seal plate (6), seal cap (46),
seal and shaft sleeve (10) off the shaft as a single
unit. Remove the shaft sleeve O‐ring (9).
Disengage the nuts (44) and remove the seal cap
(46) and gasket (11). 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. Apply oil to the sleeve and work it up