80 SERIES
OM−00974
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 Check Valve Disassembly
Before attempting to service the pump, remove the
pump casing drain plug (45) and drain the pump.
Clean and reinstall the drain plug.
For access to the check valve, remove the suction
piping. Remove the nuts (53) and separate the
suction flange (61) and gasket (51) from the pump
casing (1). Replace the suction flange gasket as re-
quired.
Disengage the machine screws (60) and pull the
check valve seat (50), gasket (49) and check valve
assembly (54) from the suction port.
Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(58 and 59) and separate the check valve gasket
(56) and weights (55 and 57).
Pump Casing and Wear Plate Removal
To service the wear plate (41), remove the nuts (40)
securing the pump casing to the seal plate (10) and
pedestal (27). Separate the pump casing and re-
move the gasket set (9).
Inspect the wear plate for scoring or excessive
wear. To remove the wear plate, disengage the
hardware (43 and 44). Pull the wear plate out of the
pump casing.
Impeller Removal
Before removing the impeller, screw the cross arm
on the automatic lubricating grease cup (11) clock-
