PA SERIES PUMPS
MR--04835
MAINTENANCE & REPAIR
PAGE C -- 8
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, C---2 and
C---3) 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 engine. However, the priming chamber assem-
bly (11, Figure C---1) and discharge check valve as-
sembly (6, Figure C---1) must be removed to ser-
vice most pump components. The following in-
structions assume complete disassembly of the
pump is required.
Before attempting to service the pump, shut down
the engine and disconnect the positive battery
cable or take other 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 casing drain plug (37, Figure C---2).
Clean and reinstall the drain 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. Shut down the engine and discon-
nect the positive battery cable or
take other precautions to ensure
that the pump will remain inopera-
tive.
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 lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam-
age to equipment. The bail is intended
for use in lifting the pump assembly
only. Suction and discharge hoses and
piping must be removed from the pump
before lifting. If chains or cables are
used to lift pump components, make
certain that they are positioned so as
not to damage the pump, and so that the
load will be balanced.
