80 SERIES
OM−03790
MAINTENANCE & REPAIR
PAGE E − 6
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review 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 and 2) 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.
For engine disassembly and repair, consult the lit-
erature supplied with the engine, or contact your
local engine representative.
Before attempting to service the pump, shut down
the engine and disconnect the spark plug wire to
ensure that it will remain inoperative. Close all
valves in the suction and discharge lines.
Before attempting to open or service the
pump:
1.
Familiarize yourself with this
manual.
2. Shut down the engine and discon-
nect the spark plug wire to ensure
that the pump will remain inopera-
tive.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, 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. Suction and dis-
charge hoses and piping must be re-
moved from the pump before lifting.
Check Valve Removal and Disassembly
(Figure 2)
Before attempting to service the pump, remove the
pump casing drain plug (19) and drain the pump.
Clean and reinstall the drain plug.
To service the suction check valve (24), remove the
suction piping. Remove the nuts (23) securing the
suction flange (32) to the pump casing (1). Pull the
check valve assembly from the suction port.
Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(27 and 28) and separate the check valve gasket
(29) and weights (25 and 26).
If no further disassembly is required, see
Suction
Check Valve Installation
.
Pump Casing Removal
(Figure 2)
To service the impeller or seal assembly, discon-
nect the discharge piping. See Figure 1 and re-
move the hardware securing the pump casing to
the base.
Remove the nuts (14), and separate the pump cas-
ing and gasket set (15) from the intermediate (6).
Clean the mating surfaces of the intermediate and
pump casing.Tie and tag the gaskets, or measure
and record their thickness for ease of reassembly.
