14
j) Remove the casing capscrews (5D) of the RA2096 or the cas-
ing nuts (5C) of the RA3146 or the RA3186, and using
mechanical lifting apparatus to support the weight, pull the
rotating unit from the casing (5). Un-screw the two jack-screws
until they are not protruding through the “casing side” of the
bearing housing (26) flange.
k) Flush the wetted parts, now exposed, with a compatible, non-
toxic, non-hazardous, stable liquid.
l) Remove the gasket from the face of the casing (5) or the bear-
ing housing (26) dependent on which one the gasket may
have adhered to. The type of gasket and material of construc-
tion will vary with service requirements. Attack by prying and
then, if necessary, layering off the old gasket with a sharp
scraper, attempting to remove it in the largest possible pieces.
Wear heavy Leather, long sleeve work gloves when using the
scraper. Wet the gasket before and during the scraping oper-
ation to reduce the possibility of fibers becoming airborne.
Wear a respirator during this operation and until all debris has
been disposed of in a plastic bag. Remove all of the gasket
material down to clean metal surfaces on both parts that con-
tacted the gasket. Use care to not damage the metal faces.
Place all of the gasket residue in a plastic bag, seal the bag
and dispose.
m) Inspect the inside of the casing (5) for any signs of wear, cor-
rosion or any other damage. If the casing needs to be
removed, remove the bolts from the suction and discharge
flanges. Remove the bolts that hold the casing feet to the base-
plate. The casing can now be removed. Remove the suction
and discharge flange gaskets using the procedure as in para-
graph “ l ” above.
n) The rotating assembly of the pump can now be moved to a
more convenient location for further disassembly. Use mechan-
ical lifting equipment to move assemblies and components.
DISASSEMBLY PROCEDURE
To further dismantle the pump, perform the following steps in the
sequence shown:
WARNING:
Use only high quality tools.
Obtain MSDS data sheets for all liquids (from the manufacturers of
those liquids) being used with the pump, and heed all cautions.
Flush parts as disassembled to remove hazardous residue from
the pumpage and/or sub-system fluids.
Wear protective equipment as advised at the beginning of this
section.
Use mechanical lifting equipment to lift assemblies and compo-
nents.
Do not apply heat to parts to assist in disassembly. Explosion
could occur causing personal injury, death, and/or damage to
equipment.
Do not attempt to drill, saw or otherwise cut parts to remove
them. Explosion and/or fuming could occur causing personal
injury, death, and/or equipment damage.
Do not hammer on any parts. Personal injury and/or damage to
equipment may occur.
a) Remove the impeller nuts (12) of the RA2096 or the impeller
bolt (12) of the RA3146 or the RA3186 (all have right hand
threads) while holding the pump shaft (29) against rotation
with a wrench on the flats of the coupling hub. When loosen-
ing the impeller nuts (12) of the RA2096, be sure to loosen the
outer nut and remove it, before loosening the nut that is closest
to the impeller (3). Remove the impeller retaining washer
(12A). Slide the impeller (3) off the shaft (29). Remove the
impeller key (4) from the shaft (29).
b) Remove the coupling hub from the pump shaft (29) by loosen-
ing the set screws and using a gear puller to pull the hub from
the shaft. Do not hammer on the coupling hub or the shaft.
Remove the coupling key. Be careful to not bend the blades of
the fan (120).
c) Remove the fan (120) from the pump shaft (29). If the pump is
a RA2096, slide the fan (120) and the fan clamp ring (122)
off of the end of the pump shaft (29). If the pump is a RA3146
or a RA3186, loosen the radially positioned securing screw in
the side of the fan collar (121) and slide the fan (120), fan
collar (121), fan clamp ring (122) assembly off the end of the
pump shaft (29). If this assembly resists removal, loosen the two
axially positioned screws that hold these parts together.
WARNING: Wear gloves when removing the fan (120) to
protect your hands as the fan is made of thin metal and could
cut you.
d) Remove the bearing end cover (28) from the bearing housing.
Remove bearing end cover gasket (77B) if pump is a RA3146
or RA3186.
e) Press the grease seal (76A) from the bearing end cover (28), if
the pump is an RA3146 or a RA3186.
f) Pull the pump shaft (29) from the bearing housing (26), using
care to keep the shaft in line with the bearing housing so
as not to damage any parts. Wear heavy work gloves.
Compression of the mechanical seal spring will be detected
during this operation.
g) Remove the set screws (370) from the mechanical seal collar
(365) and then slide it from the shaft (29). Slide the mechani-
cal seal rotary (95B) from the shaft (29). It may take a consid-
erable amount of force to remove the rotary (95B) as the elas-
tomeric shaft sealing element may grip the shaft quite tightly.
h) Remove the mechanical seal gland (13) from the shaft. Remove
the seal gland gaskets (325) from the seal gland (13). Remove
the mechanical seal stationary (95A) from the mechanical seal
gland (13). If the pump is a RA3186, remove the “mechanical
seal stationary O ring” from the inside of the mechanical seal
gland (13).
i) Remove the grease seal (76) from the seal gland (13). This can
be removed by inserting a screw driver or a small drive pin
punch into the open side of the seal and driving it out of the
seal gland.
j) If the pump is a RA2096, remove the snap ring (75A) from the
pump shaft (29). If the pump is a RA3146 or a RA3186, bend
the tab of the bearing lock washer (31A) out of the slot in the
bearing lock nut (31). Remove the bearing lock nut and the
bearing lock washer from the pump shaft (29). Press the thrust
bearing(s) (25A) from the pump shaft. Exercise care to push
only on the inner race of the bearings. Do not press on the shaft
snap ring (75) of the RA3146. Do not hammer on the bear-
ing(s) or the shaft in any manner as this may result in damage
to the shaft. Remove the snap ring (75) from the pump shaft of
the RA3146, only if it is damaged.
k) Press or drive the bearing cartridge (180) from the bearing
housing (26).
1) RA2096 procedure:
Use a 1
1
/4" diameter bar, 12" long, cut square on the
ends. Insert the bar into the coupling end of the bearing
housing (26) until it stops against the bearing cartridge
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