Gorman-Rupp Pumps PAH4A60C-B 1512735 and up - Manual (Page 32)

OM-06443 PAH SERIES
MAINTENANCE & REPAIR PAGE E - 11
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 illustrations (see Figures 1 through 6) and the
corresponding parts lists. Instructions for the air
compressor are covered separately in specific liter­
ature available from the manufacturer.
Some pump service functions may be performed
without separating the pump end assembly from
the engine. However, the priming chamber (15,
Figure 1) and discharge check valve assembly (23,
Figure 1) must be removed to service most pump
components. The following instructions assume
complete disassembly of the pump is required.
Before attempting to service the pump, lock out or
disconnect the power source and take precautions
to ensure that it will remain inoperative. Close all
valves in the suction and discharge lines and drain
the pump casing by removing the lowermost pipe
plug (5, Figure 2). Clean and reinstall the pipe plug.
This manual will alert personnel to
known procedures which require spe­
cial attention, to those which could
damage equipment, and to those which
could be dangerous to personnel.
How­
ever, this manual cannot possibly antici­
pate and provide detailed instructions
and precautions for every situation that
might occur during maintenance of the
unit. Therefore, it is the responsibility of
the owner/maintenance personnel to
ensure that only safe, established main­
tenance procedures are used, and that
any procedures not addressed in this
manual are performed only after estab­
lishing that neither personal safety nor
pump integrity are compromised by
such practices.
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 and make
sure it is cool before opening any
covers, plates, gauges, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau­
tiously.
7. Drain the pump.
Use only replacement parts provided or
approved by Gorman‐Rupp. Use of non‐
authorized parts may result in damage to
the equipment and/or injury to personnel
and will invalidate the warranty.
Priming Chamber Removal And Disassembly
(Figure 4)
Disconnect both the suction piping and the air dis­
charge tubing from the priming chamber assembly
(1). Support the priming chamber assembly using
a sling and a suitable lifting device. Remove the
hardware (6 and 7) and separate the priming
chamber assembly, gasket (8) and baffle (9) from
the pump assembly.
(Figure 5)
Remove the hardware (2 and 3) securing the prim­
ing valve (1) to the priming chamber (5). Carefully
lift the valve components from the priming cham­
ber. Remove the gasket (4) and clean the mating
surfaces.