Gorman-Rupp Pumps 12B2-B 723756 and up - Manual (Page 32)

OM-00575 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
IMPELLER
SHAFT
STATIONARY
ELEMENT
STATIONARY
WASHER
ROTATING
ELEMENT
IMPELLER
SHIMS
ROTATING
ELEMENT
SEAL PLATE
SPRING
IMPELLER
SHAFT
SLEEVE
PACKING RINGS
STATIONARY
ELEMENT
Figure 3. Seal Assembly
This seal is not designed for operation at
temperatures above 110
_F (43_C). Do not
use at higher operating temperatures.
Before installing the seal, inspect the bore of the
seal liner (9) for wear or grooves which might cause
leakage or damage to the seal packing rings. If the
seal liner requires replacement, remove the seal
plate assembly as described in Seal Removal
And Disassembly, and position it on the bed of an
arbor (or hydraulic) press. Use a new sleeve to
force the old one out. After the new liner is properly
installed, a 1/4‐inch (6,4 mm) diameter hole must
be drilled through it to permit the flow of lubricant to
the seal assembly. Be careful to center the drill in
the threaded grease piping hole and not damage
the threads. Deburr the hole from the inside of the
seal liner after drilling.
Slide the seal plate assembly over the impeller
shaft (23) and temporarily secure the seal plate to
the pedestal (26) using two capscrews and nuts
(3/8-16 UNC x 1-1/2 inch long, not supplied).
Slide the inboard rotating element into the lubri­
cated seal liner with the chamfered side toward the
shaft shoulder.
Subassemble the inboard stationary element,
packing ring and stationary washer. Press this unit
into the lubricated seal liner until the seal faces
contact. 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 size as the I.D.
of the seal spring.
Slide the spacer sleeve onto the shaft until it seats
against the inboard rotating element and install the
seal spring.
Subassemble the outboard stationary element,
packing ring and stationary washer. Press this unit
into the lubricated seal liner. Install the outboard ro­
tating element with the chamfered side toward the
impeller.