RWA2096 F
AN
M
OUNTING
w) Place the coupling hub over the end of the pump shaft (29) and
onto the coupling bolts, until the face of the hub is flush with the
end of the pump shaft. Install the coupling key, with the end of
the key flush with the end of the pump shaft and the face of the
hub. Tighten the hub set screw(s).
x) Place the impeller key (4) into the keyway of the pump shaft (29).
Carefully slide the impeller (3) onto the pump shaft (29).
1) If the pump is a RWA2096:
Slide the impeller washer (12A) over the pump shaft (29)
and against the impeller (3). Thread one of the impeller nuts
(12) onto the pump shaft (29) and tighten it to a torque of
40 lb. ft. Thread the second impeller nut (12) onto the end
of the pump shaft and tighten it to a torque of 40 lb. ft. Hold
the pump shaft against the tightening torque, by placing a
wrench on the flats of the coupling hub. Be careful not to
bend the blades of the fan (120).
2) If the pump is a RWA4166 or a RWA4206:
Place the impeller washer (12A) on to the impeller bolt (12)
and thread the impeller bolt (12) into the end of the pump
shaft (29). Tighten the impeller bolt to a torque of 60 lb. ft.
for the RWA4166 and 100 lb. ft. for the RWA4206. Hold
the pump shaft against the tightening torque by placing a
wrench on the flats of the coupling hub. Be careful to not
bend the blades of the fan (120).
y) If the pump has a casing ring (6A), press it into the casing (5).
z) Carefully insert the bearing housing (26) assembly into the
casing with a new casing gasket (77). Assure that the bearing
housing (26) assembly is fully into the casing (5) and that the
bearing housing foot (9) is in full contact with the baseplate.
Tighten the casing cap screws (5D) or the casing stud nuts (5C)
slowly and evenly so that the casing gasket will compress
evenly. Torque the casing cap screws (5D) of the RWA2096
pumps to 50 lb. ft. Torque the casing stud nuts (5C) of the
RWA4166 and RWA4206 pumps to 105 lb. ft. if the studs are
3/4
” and to 165 lb. ft. if the studs are
7/8
”.
aa) Rotate the pump shaft (29) by hand to check for interference.
Wear heavy gloves when rotating the shaft, to protect your
hands. Correct if any rubbing is detected.
ab) If the casing (5) was removed from the baseplate, reattach it with
bolts through the casing feet to the baseplate. Reattach the
suction and discharge flanges, installing new gaskets.
ac) Bolt the bearing housing foot to the baseplate. Rotate the pump
shaft (29) again by hand to check for rubbing. Wear heavy
gloves when rotating the shaft to protect your hands. Correct if
any rubbing is detected.
ad) Realign the pump and driver per instructions under
“PUMP AND DRIVER ALIGNMENT”
ae) Follow the instructions under “PUMP LUBRICATION”,
“STARTING THE PUMP”, AND “PUMP START UP
CHECKLIST”.
af) Replace the vapor eliminator into the top of the pipe tee
after filling the pump and venting the seal chamber.
Reinstall the vapor exhaust tube.
17
