MR−05740
PA SERIES PUMPS
MAINTENANCE & REPAIR
PAGE C − 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 Sectional Views (see Figures C−1 through
C−6) and the corresponding Parts Identification
Lists. Maintenance and repair instructions for the
engine and air compressor are covered separately
in the specific literature supplied by the manufac-
turers.
For part numbers and quantities for your specific
pump, refer to the separate Parts List manual ac-
companying the pump.
Many pump service functions may be performed
without separating the pump end assembly from
the power source. However, the following instruc-
tions assume complete disassembly of the pump
is required.
Before attempting to service the pump, shut down
the engine and disconnect the positive battery
cable (engine driven units) or lock out and tag out
incoming power to the control box (electric motor
driven units) take precautions to ensure that the
pump will remain inoperative. Close all valves in the
suction and discharge lines, allow the pump to
completely cool, and drain the pump casing.
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. Shut down the engine and discon-
nect the positive battery cable (en-
gine driven units) or lock out and
tag out incoming power to the con-
trol box (electric motor driven
units) and take precautions to en-
sure that the pump will remain in-
operative.
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.
This pump is designed to handle materi-
al which could cause illness through di-
rect exposure or emitted fumes. Wear
adequate protective clothing when
working on the pump or piping.
Use lifting and moving equipment in
good repair and with adequate capacity
