OM-07089
S SERIES PUMPS
PAGE E - 13
MAINTENANCE AND REPAIR
O‐RING
SPRING
RETAINER
SPRING
IMPELLER
IMPELLER KEY
BELLOWS AND
RETAINING ASSY
ROTOR
SHAFT
ROTATING
ELEMENT
STATIONARY
ELEMENT
SEAL
RETAINING RING
SEAL
PLATE
STATIONARY
SEAL SEAT
SPRING
BELLOWS AND
RETAINING ASSY
ROTATING
ELEMENT
STATIONARY
SEAT
INTERMEDIATE
O‐RING
F.H. SCREW
RETAINING RING
Figure E-6. Upper And Lower Seal Assemblies
This seal is not designed for operation at
temperatures above 122
F (50
C). Do not
use at higher operating temperatures.
Upper Seal Installation
(Figures E-1 and E-6)
Do not
unwrap a new seal assembly until time of
installation. Cleanliness of seal components is criti
cal, especially the seal faces.
Clean the rotor shaft (40) and seal cavity area of the
intermediate (47). Be sure the area is dry and free
of lint and dirt. Check the seal bore for burrs or
nicks that might prevent a good seal and a nicked
or damaged keyway. Remove them with a fine file
or hand honing stone to restore original contours. If
the shaft is bent or damaged, the complete rotor
and shaft must be replaced as an assembly. Apply
a
light
coating of oil to the bore of the intermediate.
Carefully remove the material stuffed into the seat
bore (or unwrap the shaft).
Be sure
no debris
stopped by the material falls into the seal cavity.
NOTE
When pressing seal components onto the shaft,
use hand pressure only. A push tube cut from a
length of plastic pipe will aid in installing seal com
ponents. The I.D. of the push tube should be ap
proximately the same as the I.D. of the seal spring.
Position the stationary seat and O‐ring in the inter
mediate bore with the sealing face up and cover
the seal face with a clean tissue. Use your thumbs
to press the assembly into the bore. Apply equal
pressure on opposite sides until the seat contacts
the bore shoulder. Remove the tissue and inspect
the seal face to ensure that it is clean and dry. If
cleaning is necessary, use clean tissue to wipe
lightly
in a circular pattern.
Secure the stationary seat in the intermediate with
the retaining ring (33) and screws (32).
Unpack the rotating portion of the seal. Be certain
the seal face of the rotating element is free of grit or
