Gorman-Rupp Pumps VG8D3-B 1221466 and up - Manual (Page 28)

OM-02819 VG SERIES
MAINTENANCE & REPAIR PAGE E - 8
This seal is not designed for operation at
temperatures above 160
_
F (71
_
C). Do not
use at higher operating temperatures.
Locate the collar (8) on the shaft sleeve at the
scribed mark or dimension taken before disassem­
bly, and secure with the setscrews (7).
NOTE
If the dimension is not known, slide the sleeve onto
the shaft until fully seated, and scribe the seal work­
ing length on the shaft (dimension “A” shown in Fig­
ure 2). The designed working length (from the sta­
tionary seal face to the collar) for this seal is 2-3/8
inches (60,2 mm). Secure the collar on the sleeve at
this point with the setscrews.
Position the seal plate on a flat surface with the im­
peller side down. Position the sleeve in the seal
plate bore with the chamfered end facing up.
Slide the spring holder and spring over the sleeve
and against the collar. Assemble the drive grooves
of rotating element into the drive lugs of the bellows
retainer, and slide this rotating portion of the seal
over the sleeve until the retainer seats in the spring.
Use thumb pressure to press the stationary seat
and O‐ring into the seal cap (46) until fully seated.
Slide the assembled stationary seat, seal cap and
gasket over the shaft sleeve until the seal faces
contact and secure the seal cap and gasket (11) to
the seal plate (6) with the nuts (44).
Install the sleeve O‐ring (9) completely against the
shaft shoulder. Be careful not to cut it on the impel­
ler keyway.
Slide the seal plate, shaft sleeve and seal assembly
onto the shaft. Secure the seal plate to the bearing
housing with the nuts (15).
Impeller Installation
Inspect the impeller, and replace it if cracked or
badly worn. Install the impeller key (49) and slide
the impeller onto the shaft and against the sleeve
until both are fully seated. Install the impeller nut
(48).
Install the seal plate gasket (5). Slide the pump
casing (1) over the impeller and secure it to the seal
plate with the nuts (12).
Replace any leveling shims used under the casing
mounting feet and install the hardware securing
the casing and bearing housing foot to the base.
Remove the wood block supporting the bearing
housing.
Final Pump Assembly
Be sure the pump is secure to the base and power
source.
Install the suction and discharge lines and open all
valves. Make certain that all piping connections are
tight, properly supported and secure.
Be sure the pump and power source have been
properly lubricated, see LUBRICATION.
Fill the pump casing with clean liquid. Reinstall the
fill plug (51) and tighten it. Refer to OPERATION,
Section C, before putting the pump back into serv­
ice.
LUBRICATION
Seal Assembly
The seal assembly is lubricated by the medium be­
ing pumped and no additional lubrication is re­
quired.
Bearings
The bearing housing was fully lubricated when
shipped from the factory. Check the oil level regu­
larly through the sight gauge (38)
and maintain it at
the middle of the gauge. When lubrication is re­
quired, add SAE No. 30 non‐detergent
oil through
the oil inlet plug opening (25). Do not over‐lubri­
cate. Over‐lubrication can cause the bearings to
over‐heat, resulting in premature bearing failure.
Under normal conditions, drain the bearing hous­
ing once each year and refill with clean oil. Change
the oil more frequently if the pump is operated con­