2) RWA4166 procedure:
Lubricate the inside of the shaft sleeve (10) and the pump
shaft (29), from the impeller (3) fit to the mechanical seal
gland (13). Use the same Rubber Lubricant Emulsion as in
step h) on page 15.
Carefully hold the shaft sleeve (10) centered with the pump
shaft (29), and slide it over the shaft, and into position.
Use an 11” to 13” piece of 1
1/2
” PVC, schedule 40 pipe,
with its ends cut square, to push against the end of the shaft
sleeve. This will allow you to push the sleeve (compressing
the springs of the mechanical seal rotary (95B)) against the
shoulder of the pump shaft. Hold the sleeve tightly against the
shoulder and tighten the four sleeve set screws (370) against
the pump shaft.
3) RWA4206 procedure:
Lubricate the inside of the shaft sleeve (10) and the area of
the pump shaft (29) over which the sleeve will slide. Use the
same Rubber Lubricant Emulsion as in step h) on page 15.
Carefully slide the shaft sleeve (10) over the pump shaft
(29) and into position. Use an 13” to 15” piece of 2” PVC,
schedule 40 pipe, with its ends cut square, to push against
the end of the sleeve. This will allow you to push the sleeve
(compressing the springs of the mechanical seal rotary
(95B)) against the shoulder of the pump shaft. Hold the
sleeve tightly against the shoulder and tighten the four sleeve
set screws (370) against the pump shaft.
m) Use the same Rubber Lubricant Emulsion as used in step h) on
page 15. Lubricate the seal gland gaskets (325) and the bore
in the back of the bearing housing (26), so that the seal gland
gaskets will slide in without damage. Carefully slide the shaft
assembly (29) into the bearing housing (26) from the bearing
end cover end. Do not strike the carbon bearing (180) with the
end of the pump shaft (29). Guide the mechanical seal gland
(13) and the thrust bearings (25A) into the bearing housing
(26) as the shaft assembly (29) is installed.
n) If the pump is a RWA2096, go to step u)
o) Install a new end cover gasket (77B) over the thrust bearing
(25A) and against the bearing housing (26).
p) Remove the garter spring from a new lip seal (76A) and
discard it. Press the lip seal into the bearing end cover (28),
from the bearing side, and up against the shoulder at the
opposite side, when a new shaft is being used. If the pump
shaft is not new, stop pressing on the lip seal
1/16
” before it
reaches the shoulder of the end cover, placing the sealing lip
at a new location on the pump shaft (29).
q) Lubricate the pump shaft (29) at the diameter where the lip seal
(76A) contacts. Apply any remaining grease from packing the
thrust bearings (25A) around the exposed face of the bearings
(25A). Place the end cover (28) carefully over the pump shaft
(29) and the thrust bearing (25A), with the plugged hole
towards the baseplate. Bolt the end cover (28) securely to the
bearing housing (26). Torque the end cover bolts to 20 lb. ft.
on the RWA4166 and to 35 lb. ft. on the RWA4206.
r) Mark (pencil or light scribe) a line on the pump shaft (29),
3
1/4
” for the RWA4166 and 5
1/16
” for the RWA4206, from
the coupling end. Place the fan collar (121), grooved face
first, onto the pump shaft and up to the “mark”. Refer to the
drawing above. Tighten the fan collar locking screw tightly.
Place the fan (120), with the concave side of the blades
towards the pump, over the end of the pump shaft (29) and
up against the fan collar (121). The concave side of the fan
blade was indicated with a label “PUMP SIDE” at the time it
was shipped from the factory. Rotate the fan until the holes in
the fan align with the tapped holes in the fan collar.
Place the fan clamp ring (122) over the end of the pump shaft
(29) and up against the fan (120). Align the holes in the fan
clamp ring with the holes in the fan and the holes in the fan
collar (121).
Insert the two socket head bolts, with lock washers, through
the fan clamp ring (122) and the fan (120), into the tapped
holes of the fan collar (121) and tighten them securely.
s) Insert the coupling bolts through the lockwashers and the
pump coupling hub. Place the hub onto the pump shaft (29),
positioning the outer face of the hub 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).
t) Go to step x).
u) Place the end cover (28) carefully over the pump shaft (29) and
bolt it securely into position against the bearing housing (26).
Torque the end cover bolts to 11 lb. ft.
v) Insert the four coupling bolts through the lockwashers and the
fan clamp ring (122) from the side opposite of the raised face.
The clamp ring is made to fit three different sizes of couplings,
so you must insert the bolts into the holes that match the
coupling hub that you are using. Slide the clamp ring onto the
pump shaft (29) with the raised face facing the motor.
Place the fan (120), with the concave side of the blades
towards the pump, over the end of the pump shaft, onto the
coupling bolts and up against the clamp ring. Refer to the
drawing on page 17. The concave side of the fan blade was
indicated with a label “PUMP SIDE” at the time it was shipped
from the factory.
RWA4166 & RWA4206 F
AN
L
OCATIONS
16
