Gorman-Rupp Pumps PA6C60-C4.4T 1404116 and up - Manual (Page 37)

OM-06171 PA SERIES
MAINTENANCE & REPAIR PAGE E - 17
Draining Oil From Seal Cavity
(Figure 5)
If any further disassembly is to be performed on the
pump, the seal oil cavity must be drained to pre­
vent the oil in the seal cavity from escaping as the
pump casing is removed.
Position a clean container (3 gallons [11,4 liters]
minimum capacity) under the seal cavity drain plug
(10B). Remove the plug and drain the oil from the
seal cavity into the container. For shorter drain
time, remove the vented plug (14). Clean and rein­
stall the drain plug and vent plug. Inspect the oil for
water, dirt or a cloudy condition which could indi­
cate seal failure.
Loosening Impeller
(Figure 5)
With the pump end separated from the engine,
wedge a block of wood between the vanes of the
impeller and the pump casing to prevent rotation.
Remove the impeller capscrew and washer (26
and 27).
Install the shaft key (22) in the shaft keyway. Install
a lathe dog on the drive end of the shaft (23) with
the “V” notch positioned over the shaft key.
With the impeller rotation still blocked, see Figure 9
and use a long piece of heavy bar stock to pry
against the arm of the lathe dog in a counterclock­
wise direction (when facing the drive end of the
shaft). Use caution not to damage the shaft or key­
way. When the impeller breaks loose, remove the
lathe dog, key and wood block.
Turn
Counterclockwise
Lathe Dog Arm
“V” Notch
Shaft Key
Impeller Shaft
Lathe Dog
Setscrew
Heavy
Bar Stock
Figure 9. Loosening Impeller
NOTE
Do not remove the impeller until the rotating assem­
bly has been removed from the pump casing.
Pump Casing Removal
(Figure 4)
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi­
cient capacity and that they are posi­
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Support the pump casing using a suitable hoist
and sling, and remove the hardware (18 and 19).
Install four 1/2-13 UNC x 2‐inch long jacking
screws in the tapped holes in the bearing housing
(6, Figure 5). Tighten the jacking screws in an alter­