Gorman-Rupp Pumps 16C2-F4L 1237525 thru 1319250 - Manual (Page 32)

10 SERIES OM−00725
MAINTENANCE & REPAIR PAGE E − 8
valve pin (74). Slide the assembly out of the check
valve seat (65) and remove it from the pump.
NOTE
Further disassembly of the check valve is not re-
quired since it must be replaced as a complete unit.
Individual parts are not sold separately.
The check valve assembly may also be serviced by
removing the suction flange (70). To remove the
flange, disengage the hardware (68 and 69) and
separate the flange from the check valve seat. Re-
move the machine screws (66) and pull the seat
and assembled check valve from the suction port.
Remove the check valve pin and pull the check
valve assembly out of the seat.
Replace the flange gaskets (64 and 67) as re-
quired.
Pump Casing Removal
(Figure 1)
To service the impeller or seal assembly, discon-
nect the suction and discharge piping. Remove the
hardware (50, 51, 52 and 53) securing the casing
to the base (49).
(Figure 2)
Remove the nuts (16) securing the pump casing to
the seal plate (48). Install a standard 5/8−11 UNC
lifting eye in the tapped hole in the top of the pump
casing. Be sure to screw the eye into the casing
until fully engaged. Use a hoist and sling of suitable
capacity to separate the casing from the seal plate
and intermediate.
Do not attempt to lift the complete pump
unit using the lifting eye. It is designed
to facilitate removal or installation of in-
dividual components only. Additional
weight may result in damage to the
pump or failure of the eye bolt.
Remove the casing gaskets (49) and any leveling
shims used under the casing mounting feet. Tie
and tag the gaskets and shims for ease of reass-
embly.
Impeller Removal
(Figure 2)
Turn the cross arm on the automatic lubricating
grease cup (17) clockwise until it rests against the
cover (see Figure 6). This will prevent the grease
from escaping when the impeller is removed.
To remove the impeller (2), tap the vanes in coun-
terclockwise direction (when facing the impeller)
with a block of wood or soft-faced mallet. Be care-
ful not to damage the impeller. When the impeller
breaks loose, unscrew it from the shaft. Use cau-
tion when removing the impeller; tension on the
shaft seal spring will be released as the impeller is
unscrewed. Inspect the impeller and replace if
cracked or badly worn.
Slide the impeller adjusting shims (31) off the im-
peller shaft (42). Tie and tag the shims or measure
and record their thickness for ease of reassembly.
Seal Removal and Disassembly
(Figure 2)
To remove the seal assembly (3), remove the
grease cup and piping (17, 18 and 19). Slide the
seal plate and seal parts off the shaft as a single
unit. Be careful not to drop or damage any seal
parts.
Carefully remove the stationary and rotating seal
elements, packing rings, seal spring, and shaft
sleeve from the seal plate.
NOTE
The seal assembly may be removed without com-
pletely disassembling the pump by removing the
impeller through the back cover opening and using
a pair of stiff wires with hooked ends to pull the seal
parts out of the seal plate.
Inspect the seal liner (76) for wear or grooves
which could cause leakage or damage to the seal
packing rings. The seal liner is a press fit in the seal
plate, and does not normally require replacement.
If replacement is necessary, see Seal Installation.
If no further disassembly is required, refer to Seal
Reassembly And Installation.