GORMAN-RUPP PUMPS PRIME AIRE PLUS PA10A60C-B, Инструкция по установке, эксплуатации и техническому обслуживанию с перечнем запасных частей

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OM-06674
PAH SERIES
MAINTENANCE & REPAIR PAGE E - 15
capacity) under the seal cavity drain plug (17B).
Remove the plug and drain the oil from the seal
cavity into the container. Clean and reinstall the
drain plug. Inspect the oil for water, dirt or a cloudy
condition which could indicate seal failure.
Use an impact wrench and a suitably sized allen
wrench to remove the impeller capscrew (30). Re­
move the impeller washer (7) from the shaft.
Install two
3/8
-16 UNC-2B capscrews (not sup­
plied) in the tapped holes in the impeller. Attach a
suitable puller to the capscrews and use the puller
to remove the impeller and key (27) from the shaft.
Remove the puller and the screws from the impel­
ler.
Inspect the wear ring (2) for excessive wear or
damage. The wear ring is secured in the seal plate
(8) by a press fit. If replacement is required, remove
the set screws (3) and install two 3/8-16 UNC-2B
capscrews (not supplied) at least 1-1/4 inches
long in the holes in the wear ring. Tighten the cap­
screws in an alternating sequence to “jack” the
wear ring from the seal plate.
Seal Removal
(Figures 3 and 11)
Carefully remove the spring retainer and seal
spring. Slide the rotating portion of the seal assem­
bly and shaft sleeve (5) off the shaft as a single unit.
Remove the shaft sleeve O‐ring (6). Apply oil to the
shaft sleeve and work it up under the rubber bel­
lows. Slide the rotating portion of the seal as­
sembly off the shaft sleeve.
Slide a pair of stiff wires with hooked ends along
the shaft and hook the stationary seat from the
back side. Pull the stationary seat and O‐ring from
the seal plate (8).
An alternate method of removing the stationary
seal components is to remove the hardware (14
and 15) and separate the seal plate from the ped­
estal (16). Position the seal plate on a flat surface
with the impeller side down. Use a wooden dowel
or other suitable tool to press on the back side of
the stationary seat until the seat and O‐ring can be
removed.
Remove the seal plate O‐ring (31).
If no further disassembly is required, refer to Seal
Reassembly And Installation .
Removing Air Compressor
(Figure 1)
Further disassembly of the pump requires remov­
ing the air compressor assembly (5) from the rotat­
ing assembly (6, Figure 2).
Disengage the hardware (23, 24 and 25) and re­
move the belt guard assembly (22).
Remove the hardware (3, 4 and 33) securing the air
compressor assembly to the mounting flange (20,
Figure 3). Use a pry bar to raise the air compressor
high enough to remove the spacers (2). Remove
the belt (20) from the air compressor drive pulley
(not shown).
Disconnect all hoses and fittings from the air com­
pressor and use a suitable hoist and sling to re­
move the air compressor assembly.
Draining Oil From Seal Cavity
(Figure 3)
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 (19B). Remove the plug and drain the oil
from the seal cavity into the container. For shorter
drain time, remove the vented plug (13). Clean and
reinstall the drain plug and vent plug. Inspect the
oil for water, dirt or a cloudy condition which could
indicate seal failure.
Impeller Removal
(Figure 3)
With the pump casing removed, use a suitable
three‐jawed puller to remove the impeller (1) and
key (26) from the shaft (25). Use caution when re­
moving 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