6
4. See Section “J” and Section “F” for repacking and
adjustment of stuffi ng box.
5. Inspect the gasket (5) between the support head (11)
and casing (1). If torn when taking pump apart, replace
with a new one. Mount casing (1) on support head and
fasten in place with cap screws (3) and nuts (22).
6. See Section “E” for impeller adjustment.
7. Replace pulley or coupling on the shaft and tighten set
screw. Replace drain plug (4) and connect suction and
discharge pipes to pump.
J - REPACKING STANDARD STUFFING
BOX
1. Remove gland cap screws (10) and nuts (17) and move
gland (7) back against slinger. With a packing puller or
wire hook, remove the old stuffi ng box packing (8).
2. Cut four rings of packing so that when wrapped around
the shaft, the ends touch. Tamp each ring into position,
staggering the joints about 120º apart. Turn shaft after
tamping each ring.
3. Position stuffi ng box gland and replace gland cap
screws (10) and nuts (17). Tighten nuts to seat packing,
then loosen until shaft can be turned easily by hand.
Force freash grease into the stuffi ng box thru grease
fi tting (12). Adjust packing as described in Section “F”.
K - TO REPLACE MECHANICAL SEAL
.
NOTE:
Seals are available as a complete assembly only.
1. Special precautions must be observed when handling
a mechanical seal.
ALL
seal parts
MUST
be kept
CLEAN
.
DO NOT
drop seal face carbons, or fl oating
seats, nor scratch the lapped faces of these parts.
2. Dismantle pump as described in Section “H”, Item
numbers 1 and 2.
3. Unscrew cap screws (10) and nuts (17) from seal gland
(32).
4. Loosen the two set screws (25) in the bearing collar (13).
Also, remove plug (21) and turn shaft until set screws
(25) in bearing collar (20) line up with opening. Loosen
both set screws.
5. Brace support head (11) and tap lightly on end of shaft
(2). Shaft and impeller can now be removed as a unit.
Slinger (6), seal gland (32), seal gland gasket (29), seal
(31), and spacer sleeve (35), may now be removed from
the support head (11).
6. To remove bearings (24) and (26), remove screws (15)
and bearing cover (14). By pulling on bearing collar (13)
bearing (24) can be removed. Insert a bar into the
coupling end of the support head and push bearing (26)
towards impeller end.
7. Clean shaft thoroughly, use a light grade of emery paper
with oil to remove any scratches or burrs from the shaft
surface.
8. When replacing the seal, apply a thin coating of light
grade clean oil to the inside of the seal gland insert and
to the outside of the stationary member of the seal (31),
and press into seal gland, Wipe the face of the rotating
member of the seal to remove any dirt or grit. Next apply
a thin coating of light grade clean oil to the shaft (2) and
to the inside of the rotating seal member.
9. Push ball bearing unit, which consists of ball bearing (26)
and bearing collar (20) into support head (11) from the
seal end until fl ush with support head.
10. Insert shaft (2) into support head (11) and replace
on the shaft spacer sleeve (35), the seal (32), seal gland
gasket (29), seal gland (32) and slingr (6), After the
shaft is in place, push the ball bearing assembly,
consisting of the ball bearing (24) and thrust bearing
collar (13) over shaft into position.
11. Replace bearing cover (14) and machine screws (15).
12. Assemble casing (1) and gasket (5) and adjust impeller
as in Section “E”.
13. Position the shaft seal in the seal chamber by pushing
carefully on the seal gland.
14. Tighten seal gland in position.
15. Reposition slinger (6) for proper clearance.
16. Connect tubing from casing to seal chamber.
17. Replace pulley or coupling on the shaft and tighten set
screws. Replace drain plug (4) and connect suction and
discharge pipes to pump.
