D SERIES
OM-01516
MAINTENANCE & REPAIR
PAGE E - 10
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 views (see Figures 1 through 4) and
the accompanying parts lists.
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.
Most service functions may be performed without
separating the pump and gearbox from the motor.
If major repair is required, the pump, gearbox and
motor must be disconnected.
Before attempting to service the pump, shut off in
coming power to the motor and lock it out to ensure
that it will remain inoperative. Close all valves in the
suction and discharge lines.
For motor disassembly and repair, consult the lit
erature supplied with the motor, or contact your lo
cal motor representative.
Before attempting to open or service the pump:
1. Familiarize yourself with this man
ual.
2. Shut off incoming power to the mo
tor and lock it out to ensure that the
pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge valve (if
used).
5. Drain the pump.
Before attempting to service the pump, drain the
pump by removing the drain plug (11, Figure 2).
Clean and reinstall the drain plug.
Suction And Discharge Check Valve Removal
(Figure 2)
To service the suction and discharge check valves,
remove the suction and discharge piping.
To service the suction check valve assembly (32),
remove the suction accumulator (3) by loosening
the hardware (8 and 9) securing it to the diaphragm
pot (1). Remove the hardware (5 and 6) securing
the valve seat (31) and check valve assembly to the
diaphragm pot. Pull the check valve assembly from
the suction port.
To service the discharge check valve assembly
(25), loosen the hardware (21 and 22) and remove
the assembled outboard discharge elbow (23),
check valve, and seat (24). Remove the gasket
(19).
Remove the hardware (16 and 17) securing the
valve seat (24) and discharge check valve assem
bly to the discharge elbow.
To remove the inboard discharge flange (18), loos
en the hardware (14 and 15) securing the flange to
the diaphragm pot. Remove the gasket (12).
The suction and discharge check valve assemblies
are identical parts and operate in the same direc
tion. For removal and/or replacement, remove the
hardware (29, 30, 35 and 36) securing the check
valve weights (26, 28, 33 and 34) to the check
valves (27 and 37). Inspect and replace as re
quired.
If no further disassembly is required, see
Suction
And Discharge Check Valve Installation
.
