Gorman-Rupp Pumps 03H1-GL 282480 and up - Manual (Page 29)

OM-01193 0 SERIES
MAINTENANCE & REPAIR PAGE E - 9
bore. Be careful not to damage the seal face. After
installation, wipe the seal face in a concentric pat­
tern with a clean, lint‐free cloth to remove any fin­
gerprints.
Subassemble the rotating element into the retainer
and bellows, and slide this subassembly over the
shaft sleeve until the rotating element is just flush
with the chamfered end of the sleeve. Slide the
sleeve and rotating portion of the seal onto the
shaft until the seal faces contact. Continue to push
the sleeve through the seal until the sleeve is fully
seated against the shaft shoulder.
Install the seal spring. Make sure that all compo­
nents of the seal are seated squarely.
Impeller Installation
(Figures 1 and 4)
Inspect the impeller (2), and replace it if cracked or
badly worn. If the seal guard (15) was removed,
press the replacement guard onto the impeller until
it seats squarely against the bore shoulder.
The seal guard must seat squarely on the
impeller or binding and/or excessive wear
will result.
Align the impeller and key (20) with the shaft key­
way, and press the impeller onto the shaft until fully
seated. Be sure the seal spring seats squarely
over the shoulder on the back of the impeller.
NOTE
After the impeller has been installed, check for free
rotation. Correct any scraping or binding before fur­
ther reassembly.
Align the hole in the impeller washer (19) with the
key, and install the washer. Immobilize the drive
shaft (14, Figure 2), and install the impeller screw
and lockwasher (21 and 22). Torque the impeller
screw to 20 ft. lbs. (240 in. lbs. or 2,8 m. kg.).
Pump Casing and Wear Ring Installation
(Figure 1)
If the wear ring (24) was removed for replacement,
press the replacement ring into the pump casing
until it seats squarely against the shoulder bore.
The wear ring must seat squarely in the
casing bore or binding and/or excessive
wear will result.
For maximum pump efficiency, the impeller should
be centered within the pump casing. To verify im­
peller positioning, measure the pump casing and
impeller as shown in Figure 4. Use these measure­
ments to calculate the required impeller location
(dimension E). Add or remove gaskets in the pump
casing gasket set (44) to obtain dimension E.
NOTE
When calculating pump casing positioning, figure
30% compression for pump casing gaskets.