Gorman-Rupp Pumps VGH2 1/2D31-B 1379872 thru 1208720 - Manual (Page 27)

OM−06122 VGH SERIES
MAINTENANCE & REPAIR PAGE E − 5
move the seal plate gasket (41) and clean the mat-
ing surfaces.
Immobilize the impeller shaft (20). Remove the im-
peller hardware (45, 46, 47 and 50). Using a soft-
faced mallet, tap the impeller from the shaft. Retain
the impeller key (51). Inspect the impeller and re-
place it if cracked or badly worn.
Wear Ring Removal
Inspect the wear rings (42 and 44) for excessive
wear or scoring. The wear rings are secured in the
seal plate by the set screws (53) and a press fit. If
replacement is required, remove the set screws.
Using a small bit, drill two holes through each of the
wear rings horizontally, 180
_ apart. Use a chisel or
other suitable tool to complete the cuts through the
wear rings, and remove them. Use caution not to
damage the pump casing or seal plate when re-
moving the wear rings.
Seal Removal
(Figures 1 and 2)
To remove the seal assembly (3), remove the nuts
(10 and 35) securing the seal plate (39) to the bear-
ing housing (15) and seal flange (37). Slide the seal
plate and gasket (38) off the shaft (22).
Loosen the set screw (54) securing the shaft sleeve
(57) to the shaft. Slide the sleeve, seal assembly
and seal flange off the shaft as a unit.
Slide the shaft sleeve and rotating portion of the
seal out of the seal flange. Remove the O-ring (40)
from the groove in the I.D. of the sleeve. Lubricate
the shaft sleeve with light oil and work it up under
the rubber bellows. Slide the rotating portion of the
seal off the shaft sleeve.
Unscrew the pin (11) and press the stationary seal
seat and O-ring out of the seal flange.
If no further disassembly is required, see Seal
Installation.
Shaft and Bearing Removal And Disassembly
When the pump is properly operated and main-
tained, the bearing housing should not require dis-
assembly. Disassemble the shaft and bearings
only when there is evidence of wear or damage.
Shaft and bearing disassembly in the field
is not recommended. These operations
should be performed only in a properly-
equipped shop by qualified personnel.
Remove the shaft key (56).
Remove the hardware (27 and 28) securing the
foot (29) to the base, and move the bearing hous-
ing to a clean, well-equipped shop for disassem-
bly.
Remove the constant level oiler (18) from the bear-
ing housing. Remove the drain plug (28) and drain
the oil from the bearing housing. Clean and rein-
stall the drain plug.
Disengage the hardware (14 and 20) and remove
the inboard and outboard bearing covers (25 and
34) and gaskets (26 and 33). Inspect the oil seals
(23 and 32) and, if replacement is required, use a
screwdriver or other suitable tool to pry them from
the bearing covers.
Place a block of wood against the impeller end of
the shaft and tap the shaft and assembled bearing
(19) out of the bearing housing.
The inner ring for the roller bearing (31) will be re-
moved with the shaft, while the outer ring and roll-
ers will remain in the bearing housing. Press the
outer ring and rollers out of the bearing housing
from the back side. There are puller notches on the
back side of the inner ring. Use a suitable puller to
remove the inner ring from the shaft.
Remove the snap ring (24) and outboard bearing
spacer (21). Use a bearing puller to remove the
outboard bearing (19) from the shaft. Remove the
inboard bearing spacer (21).
After removing the shaft and bearings, clean and
inspect the bearings as follows.
It is strongly recommended that the bear-
ings be replaced any time the shaft and
bearings are removed.