Gorman-Rupp Pumps 3D-E1.5 1P 883504 and up - Manual (Page 26)

D SERIES OM-03604
MAINTENANCE & REPAIR PAGE E - 10
PUMP 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, 2, 3 and 4) and
the accompanying parts lists.
Before attempting to service the pump, lock out
and tag out incoming power to the motor 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.
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 open or service the
pump:
1. Familiarize yourself with this man­
ual.
2. Lock out and tag out incoming
power to the motor to ensure that
the pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Drain the pump.
Before attempting to service the pump, drain the
pump by removing the drain plug (18, 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 (26),
remove the suction accumulator (10) by removing
the hardware (13 and 14) securing it to the dia­
phragm pot (18). Remove the hardware (7 and 8)
securing the valve seat (15) and check valve as­
sembly to the diaphragm pot. Pull the check valve
assembly from the suction port.
To service the discharge check valve assembly
(26), loosen the hardware (3 and 4) and remove the
assembled discharge flange (1), valve seat (25)
and check valve assembly. Remove the gasket
(24).
Remove the hardware (5 and 6) securing the valve
seat and discharge check valve assembly to the
discharge elbow.
To remove the discharge flange (23), loosen the
hardware (21 and 22) securing the flange to the di­
aphragm pot. Remove the gasket (19).
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 (28 and 29) securing the check valve
weights (27 and 30) to the check valve (31). Inspect
and replace parts as required.
If no further disassembly is required, see Suction
And Discharge Check Valve Installation.
Diaphragm Removal
(Figure 1)
To remove the diaphragm (9, Figure 3), disengage
the hardware (32, 33 and 34) and remove the dia­
phragm pot assembly (35). Inspect the diaphragm
ring (36) for wear or damage. If replacement is re­
quired, the gearbox assembly (8) must be re­
moved.
(Figure 3)
Remove the nuts (13). Separate the lower dia­
phragm plate assembly (10) from the diaphragm
(9) and the upper diaphragm plate (8). Inspect the
diaphragm and replace a required.