Gorman-Rupp Pumps VGH2C31-B 1379872 thru 1208722 - Manual (Page 27)

OM−06117 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
pump casing and seal plate by the set screws (54)
and a press fit. If replacement is required, remove
the set screws. Using a small bit, drill two holes
through 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 removing 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 (53) 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 bear-
ings out of the bearing housing.
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.
Clean the bearing housing, shaft and all compo-
nent parts (except the bearings) with a soft cloth
soaked in cleaning solvent. Inspect the parts for
wear or damage and replace as necessary.
Most cleaning solvents are toxic and
flammable. Use them only in a well ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.