Gorman-Rupp Pumps 13D-GX270 1421807 and up - Manual (Page 27)

OM−06214 10 SERIES
MAINTENANCE & REPAIR PAGE E − 9
This seal is not designed for operation at
temperatures above 110
_F (43_C). Do not
use at higher operating temperatures.
Position the inboard rotating element on the shaft
with the chamfered side toward the impeller, and
slide it on until fully seated.
Subassemble the inboard stationary seat, 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.
Install the spacer sleeve and seal spring.
Subassemble the outboard stationary seat, pack-
ing ring and stationary washer. Press this unit into
the lubricated seal liner. Install the outboard rotat-
ing element with the chamfered side toward the
impeller.
After the impeller and grease cup have been in-
stalled, lubricate the seal as indicated in LUBRI-
CATION, Section E.
Impeller Installation And Adjustment
(Figure 2)
Inspect the impeller and replace it if cracked or
badly worn. Install the same thickness of impeller
shims (4) as previously removed. Apply ‘Never-
Seez’ or equivalent compound to the shaft threads
and screw the impeller onto the shaft until tight.
Pump Casing Installation
(Figure 2)
Lubricate the intermediate O-ring (24) with light oil
and install it on the intermediate. Install the pump
casing (1) over the intermediate until the casing
bottoms against the locating shoulder of the inter-
mediate. Be careful not to damage the O-ring. Se-
cure the pump casing to the intermediate with the
hardware (20 and 21).
A clearance of .008 to .015 inch (0,20 to 0,38 mm)
between the impeller and the wear plate is recom-
mended for maximum pump efficiency. This clear-
ance must be set after installing the back cover by
adding or removing shims in the adjusting shim set
(9) until the proper clearance is achieved.
See Figure 1 and secure the pump casing (1) to the
base (3) with the hardware (12, 13 and 14). Be sure
to reinstall any leveling shims used under the
mounting feet of the pump casing.
Back Cover Installation
(Figure 2)
Inspect the wear plate (25) and replace it if badly
worn or grooved. Install the wear plate on the back
cover using the hardware (27 and 28).
Clean any scale or debris from the back cover
shoulder and pump casing which might prevent a
good seal.
NOTE
Apply a film of ‘Never-Seez’ or equivalent com-
pound on the back cover shoulder or any surface
which contacts the pump casing to ease future dis-
assembly and to reduce rust and scale build up.
Replace the back cover gasket (36) and slide the
back cover assembly (32) into the pump casing.
Be sure the wear plate does not scrape against the
impeller.
Secure the back cover assembly to the pump cas-
ing by installing the washers and wing nuts (30 and
31). Do not over tighten the wing nuts; they should
be just tight enough to ensure a good seal at the
back cover shoulder.
Suction Check Valve Installation
(Figure 2)
Inspect the check valve components and replace
as required.
Position the check valve assembly (32) in the suc-
tion port with the large valve weight facing toward
the inside of the pump casing. Install the suction
flange (37) and secure with the nuts (39). Check
the operation of the check valve to ensure proper
seating and free movement.