Pentair Pool Products Hydromatic OSP50 Owner's Manual page 6

Pump
Servicing
13.Remove seal. Remove the old
stationary portion of the seal
(23) from the case (21) by
inserting a screwdriver into the
seal housing of the case from
the top of the case and tapping
lightly with a hammer. Clean
the seal area of the case with a
clean cloth.
14.Reinstall the rotor and shaft
assembly. Push on outer face
to seat bearing in volute case.
15.Reinstall seal. Apply an oil
lubricant to the new stationary
portion of the seal (23) and
press into the case (21). Coat
the new rotating portion of seal
with lubricant and
into place on the rotor shaft
with the rubber ring facing
the impeller.
16.Reinstall impeller. Add a drop
of Locktite 277 to the shaft
and screw the impeller on
hand tight. The impeller will
force the rotating portion of
seal into position.
17.Replace seal ring. Remove
the old square seal ring (20)
from the volute and stretch
on a new ring coated with
O-ring lube.
Do not roll the ring onto the
volute or improper seating and
water leakage into the motor
housing will result.
6
18.Reinstall the stator. Place the
stator (15) in the volute case
(21) so the stator bolt holes
line up. Lay the stator plate
(13) on the stator (15) and line
up with stator bolt holes. Put in
the stator bolts (12) and tighten
evenly to prevent cocking of
the stator. Push the connectors
of the power cord onto the
stator terminals.
19.Reinstall motor housing.
Tighten down the four hex
head cap screws (22) evenly
to prevent cocking of motor
housing and achieving an
uneven seal on the seal
ring (20).
20.Oil. Fill the motor cap with
high grade transformer oil such
as WOCO Premium 100 oil or
equivalent to at least 1⁄4" over
press
motor windings (.54 gallon).
Do not fill the motor housing
completely — allow airspace
for oil expansion.
21.Reinstall oil pipe plug. Coat
pipe threads with
sealant before installing.
22.Check pump. Plug the power
cord into a grounded outlet
and start pump by applying
pressure to the
diaphragm (automatic only —
manual should start when
power is applied). Motor
should run smoothly, be free of
vibration and stop
pressure is removed.
thread
switch
when