Gorman-Rupp Pumps PAH6B60-6068H IT4 1529202 and up - Manual (Page 42)

OM-06602 PAH SERIES
MAINTENANCE & REPAIR PAGE E - 19
supplied) in the tapped holes in the suction head
and use the screws to press the wear ring out of the
suction head. Remove the jacking screws.
Pump Casing Removal
(Figure 5)
Remove the uppermost pipe plug (5) from the
pump casing and install a lifting eye in the hole. Be
sure to screw the lifting eye tightly into the hole as
far as it will go. Attach a sling and suitable lifting de­
vice to the lifting eye and support the pump casing.
Remove the hardware (8 and 9) and use the lifting
device to pull the pump casing straight away from
the rotating assembly (6).
Remove and discard the pump casing O‐ring (3A).
Draining Oil From Seal Cavity
(Figure 6)
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
impeller is removed.
Position a clean container under the seal cavity
drain plug (18B). Remove the plug and drain the oil
from the seal cavity into the container. For shorter
drain time, remove the air vent (13). When the oil is
drained, clean and reinstall the drain plug and air
vent. Inspect the oil for water, dirt or a cloudy condi­
tion which could indicate seal failure.
Impeller Removal
(Figure 6)
With the pump casing removed, use an impact
wrench with a hex key to loosen the impeller caps­
crew (2). Remove the capscrew, impeller washer
(3) and roll pin (4).
Use a suitable three‐jawed puller to remove the im­
peller (1) and key (26) from the shaft (25). Use cau­
tion when removing the impeller; tension on the
shaft seal spring will be released as the impeller is
removed.
NOTE
An alternate method of removing the impeller is to
insert a pair of wedges 180
_ apart between the im­
peller and seal plate (9). Tap the wedges evenly in
an alternating pattern to “walk” the impeller off the
shaft.