Gorman-Rupp Pumps 16C20-F4L 1317844 and up - Manual (Page 31)

OM-01604 10 SERIES
MAINTENANCE & REPAIR PAGE E - 9
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 4. Loosening Impeller
Pump Casing Removal
(Figure 2)
Remove the nuts (16) securing the pump casing to
the seal plate (54). 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 pump casing gaskets (55). Remove
any leveling shims used under the casing mount­
ing feet. Tie and tag the gaskets and shims for ease
of reassembly.
Impeller Removal
(Figure 2)
To remove the impeller (2), unscrew it in a counter­
clockwise direction (when facing the impeller). Use
caution 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 (32) off the im­
peller shaft (47). 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 bottle
oiler and piping (17, 18 and 19) from the seal plate
(54). Carefully remove the spring holder and
spring. Slide the shaft sleeve (33) and rotating por­
tion of the seal assembly off the shaft as a single
unit. Apply oil to the sleeve and work it up under the
rubber bellows. Slide the rotating portion of the
seal off the sleeve.
Carefully slide the seal plate (35) and stationary
portion of the seal off the shaft as a unit. Use a suit­
ably sized dowel to press the stationary portion of
the seal out of the seal plate from the back side.
Inspect the oil seal (22) and, if replacement is re­
quired, press it from the seal plate.
If no further disassembly is required, refer to Seal
Reassembly And Installation.
Shaft and Bearing Removal and Disassembly
(Figure 2)
When the pump is properly operated and main­
tained, the intermediate should not require disas­
sembly. 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 intermediate drain plug (51) and drain
the lubricant. Clean and reinstall the drain plug.
Disengage the hardware (43 and 44) and remove
the bearing cap (45), gasket (42), outboard oil seal