HO SERIES
PL−02836−02
MAINTENANCE & REPAIR
PAGE E − 2
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review all warnings in the INSTALLATION AND
OPERATION manual.
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 view (see Figure 1) and the accompa-
nying parts list.
Pump Disassembly
Before attempting to service the pump, close all
valves in the system and remove the suction and
discharge piping. Remove the hardware securing
the pump to its mounting surface, and move the
pump to a clean, well-equipped shop for service.
Loosen the capscrew (4) and remove the lever (7).
Remove the capscrews (6), and pull the lid (10),
wing and shaft assembly (8), and oil seal (9) out of
the housing as a single unit. Remove the housing
gasket set (11) and clean the mating surfaces.
NOTE
Note the location of the words IN" and OUT" on
the lid compared to the suction and discharge
ports. This is
very important
for reassembly. The fill
plug (5) should be located in the 3 o’clock position.
Slide the wing and shaft assembly out of the lid.
Use a screwdriver or other suitable tool to pry the
oil seal out of the lid.
Lift the suction deck assembly (13) and discharge
deck assembly (3) out of the housing (1). Inspect
the two locating pins (12) for damage. If replace-
ment is required, pull them from the housing.
Pump Reassembly
Clean all component parts with a cloth soaked in
fresh cleaning solvent. Use an approved solvent
when cleaning parts;
never
use gasoline.
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WARNING
MOST CLEANING SOLVENTS ARE TOXIC AND
FLAMMABLE. USE THEM ONLY IN A WELL−
VENTILATED AREA FREE FROM EXCESSIVE
HEAT, SPARKS, AND FLAME. READ AND FOL-
LOW ALL PRECAUTIONS PRINTED ON SOL-
VENT CONTAINERS.
Inspect the parts for wear or damage and replace
as required. If the shaft or wing are damaged, the
complete assembly must be replaced. Individual
parts are not sold separately. The same is true of
the suction and discharge deck assemblies; valves
are not sold separately.
If removed, press new locating pins (12) into the
housing.
Install the suction deck assembly (13) in the hous-
ing so that the valves are directed
toward
the cen-
ter of the pump.
Install the discharge deck assembly (3) in the
housing so that the valves are directed
away
from
the center of the pump.
Lightly lubricate the oil seal (9), and use an arbor
(or hydraulic) press and a suitable sized dowel to
install it in the lid (10) with the lip positioned as
shown in Figure 1.
Carefully slide the wing and shaft assembly (8) into
the lid.
Be careful
not to roll the lip of the oil seal.
Position the housing gasket set (11) against the lid,
and slide the assembled lid, seal, and wing and
shaft assembly into the housing.
NOTE
The raised bosses on the wing should be directed
toward the suction deck assembly to provide prop-
er mounting.
Secure the lid to the housing with the capscrews
(6).
Be sure
the words IN" and OUT" cast into the
lid are directed toward the correct ports. The fill
plug should be located in the 3 o’clock position.
Secure the lever (7) to the shaft with the capscrew
(4).
Check the shaft endplay. If endplay is excessive,
remove the lid and discard one of the housing gas-
kets.