PA SERIES PUMPS
MR−05861
MAINTENANCE & REPAIR
PAGE C − 16
SEAL PLATE
O-RINGS
IMPELLER
OIL SEALS
STATIONARY SEAT
STATIONARY ELEMENT
ROTATING ELEMENT
BELLOWS
IMPELLER
SHIMS
IMPELLER
SPRING
RETAINER
SHAFT
DRIVE BAND
SEAL PLATE COVER
SPRING
RETAINER
SHAFT SLEEVE
Figure C−6. Seal Assembly
This seal is not designed for operation at
temperatures above 160
_
F (71
_
C). Do not
use at higher operating temperatures.
Press the oil seal (23) into the seal plate cover (24)
with the lip positioned as shown in Figure C−2.
Make sure the oil seal is fully seated. Lubricate the
O-ring (26) and install it in the groove in the seal
plate cover. Press the seal plate cover into the seal
plate and secure it with the machine screws (25).
To ease installation it is recommended that the
shaft sleeve (46) be installed in the seal plate cover
before installing the seal plate (27). Lubricate the
sleeve and slide it through the oil seal from the in-
termediate side of the seal plate cover.
Be sure
to
position the sleeve with the chamfered end toward
the intermediate side of the cover.
Slide the assembled shaft sleeve and seal plate
onto the shaft until the sleeve seats against the
shaft shoulder. Position the seal plate against the
intermediate with the air vent (33) toward the top
and temporarily secure the seal plate to the inter-
mediate with two capscrews and nuts (1/2 UNC by
1−1/2 inch long, not supplied).
Assemble the O-rings into the stationary seat.
Press the stationary element into the stationary
seat with the chamfered side facing away from the
seat. Press this subassembly into the seal plate
bore until fully seated. A push tube cut from a
length of plastic pipe would aid this installation.
The I.D. of the tube should be approximately the
same as the I.D. of the seal spring.
It is recommended that a tapered sleeve be
installed over the shaft threads to ease installation
of the seal. With the tapered sleeve in place, subas-
semble the rotating element into the rotating por-
tion of the seal assembly with the chamfered side
facing out. Lubricate the I.D. of the bellows and
slide the rotating portion of the seal assembly onto
the shaft sleeve until the sealing faces contact.
Remove the tapered sleeve and install the seal
spring.
