Carver RS A, Installation, Operation And Maintenance Manual

Page: 34 / 67

RS Series – Multi-Stage, Ring Section Pumps January 2001
28
locknut (22) and bearing lockwasher
(69). Remove male connector (410)
body from seal gland (17A).
23. Remove back-to-back bearings (16) with
bearing frame (99).
24. Inspect back-to-back bearings (16) and
oil seal (169) for wear, corrosion or
contamination. Carver recommends
replacing back-to-back bearings (16)
and oil seal (169) after they have been
removed from shaft (6). Refer to
paragraph B of this section for bearing
maintenance.
25. Remove bearing spacer (78) with slinger
(40) intact, from shaft (6).
26. Remove snap ring (176).
27. Remove spacer sleeve (14C).
NOTE
Do NOT remove rotating element of
mechanical seal (90) from shaft sleeve
(14A) at this point, especially if
mechanical seal (90) is relatively clean,
in good working condition.
28. Remove o-ring (89X).
29. If necessary to replace mechanical seal,
remove stationary element of
mechanical seal (90) in seal gland
(17A). Remove gland o-ring (89H) from
seal gland (17A).
30. Remove sleeve (14A) and rotating
element of mechanical seal (90). Inspect
rotating element of mechanical seal
(90). If replacement is required, remove
element from sleeve (14A).
31. Remove key (32X) from shaft (6).
NOTE
Do NOT remove seal collar (68), unless
sleeve (14A) needs replaced.
32. Remove setscrews (665) from shaft
collar (68). Remove shaft collar (68)
from sleeve (14A).
ASSEMBLY
Refer to the applicable sectional drawing for
location of parts followed by an item number.
Assemble the pump in accordance with
accepted rules of engineering practice.
Assembly of the pumping unit should be
performed on a flat surface. Carver recommends
all nuts and bolts be torqued according to Table
10, Recommended Torque Values. Check to
make sure components are fitted in correct
sequence. Assembly begins at the suction
(inboard end) of the pump. Perform the following
procedures to assemble the pumping unit:
NOTE
To ensure proper seating of bearing
parts, rotate the bearing while clamping
the parts.
1. Install sleeve key (32X) into keyway
in shaft (6). Install o-ring (89X).
Slide shaft sleeve (14A) onto end of
shaft (6), lining up keyway of shaft
sleeve (14A) with sleeve key (32X).
Install spacer sleeve (14C).
2. To determine placement of seal collar
(68) on shaft sleeve (14A), refer to
Table 6. For installation of mechanical
seal (90) rotating element, refer to the
following procedure:
a. Scribe a mark on shaft sleeve (14A)
at the distance from coupling end.
Refer to Table 6, Standard
Mechanical Seal Settings, for
specified distance.
b. Install seal collar (68) immediately
to the impeller side of the scribe
mark. Secure seal collar (68) to
shaft sleeve (14A) with setscrews
(665).
3. Lubricate both gland (17A) and
stationary element of mechanical
seal (90) with petroleum jelly or
suitable lubricant. Insert stationary
element of mechanical seal (90) into
gland (17A). Install o-ring (89H).
4. Slide gland (17A) onto end of shaft
(6). As applicable, ensure tap flush
lines in gland (17A) is positioned so
flush lines can be connected.
5. Install snap ring (176) on shaft (6).
6. Install slinger (40) on bearing spacer
(78). Slide bearing spacer (78) onto
end of shaft (6).
7. Install oil seal (169) in frame.
8. Install end of shaft (6) through
inboard side of bearing frame (99).
caution
While installing back-to-back bearings,
do NOT unnecessarily hit bearings. If
damage to bearings occurs, replace
damaged bearings with new bearings.
Refer to Section V, paragraph B.
9. Install new bearing (16) back-to-back on
shaft (6).