Wanner Engineering, Inc.
8
United States
Instant Information: www.wannereng.com
(61) 33-5681 Fax (61) 33-6937
SCK-991-400B
Service
X
Jam Bolt
(37-A)
Jam Bolt
(37-B)
(Jam Bolt 37-C not shown)
Thru Bolt
(36)
(3 places)
W0447
Reassembly – Single Seal
18. If a single seal is to be installed, place the stationary seat (with
gaskets) in position in the back cover. Secure the gland (30) to
the mounting plate studs (28), using hex nuts (40-A).
Torque
the nuts to the following value (do not over torque!):
1-3/8” Dia. Shaft:
2-4 ft-lbs
1-7/8” Dia. Shaft:
3-5 ft-lbs
2-1/4” Dia. Shaft:
3-7 ft-lbs
19. Clean the shaft sleeve with alcohol. With the frame fixed to
the work table, place the single rotating assembly on the shaft
sleeve (6), and slide the assembly to the end of the sleeve.
When installing the sleeve, be sure that the sleeve drive pin
(9) engages the notch in the sleeve. (This can be verified by
rotating the shaft.)
20. Carefully install the adaptor, back cover, and seal stationary
assembly over the shaft and sleeve. Secure with four bolts
(39) and hex nuts (40-C).
Reassembly – Double Seal
Note:
If a double seal is to be installed, be sure that the set screws
are backed out enough so as not to damage the shaft sleeve.
21. If a double seal is to be installed, place the seal rotating
element in the center of the shaft sleeve (6). Place the
stationary seat (with gaskets) in the back cover, then set the
rotating element (with shaft sleeve, 6) on the stationary seat.
Be sure the impeller end of the sleeve is pointed down.
22. After installing the outside stationary face in the stuffing box
(46), carefully place the stuffing box over the double seal and
mounting plate (28) studs,
ensuring that the arrow on the
stuffing box flange is pointing up toward the slot on the
adaptor (27). Torque the hex nuts to the values indicated
in step 18.
Locate the set screw under the top hole, and hold
it in position using an Allen wrench.
23. Carefully slide the shaft sleeve, along with the attached
stuffing box, adaptor, and back cover, over the shaft. Be sure
that the sleeve drive pin (9) engages the notch in the sleeve
I.D. Secure the adaptor to the frame with four bolts (39) and
nuts (40-C).
24. Check that the O-ring (8) is installed in the counterbore of
the impeller, then screw the impeller securely onto the shaft.
The O-ring can be held in position by placing a small dab of
grease under it in a couple locations.
25. Place the casing O-ring (4) over the back cover (2).
26. Secure the frame adaptor to the casing (1), using eight bolts
(35) and hex nuts (41).
Torque to the following values:
AA, AB Pumps:
12-13 ft-lbs
A30-A70 Pumps:
28-32 ft-lbs
Setting The Impeller Clearance
1. Using the jam bolt (37-A), move the impeller and shaft
assembly until the impeller touches the back cover.
2. With all bearing housing thru-bolts (36) and jam bolts (37-A,
37-B, 37-C) loose, slowly move the housing forward with one
thru-bolt, while you rotate the shaft by hand. Continue until
the impeller touches the front casing.
3. Screw the jam bolt (37-A) toward the bearing housing until
it touches the housing.
Tighten the jam nut on the jam
bolt.
4. Again check that all thru-bolts are loose and, using the jam
bolt (37-B), screw the bearing housing backward while slowly
turning the shaft by hand
until the impeller touches the
back cover.
5. With a feeler gauge, measure the gap between the jam bolt
(37-A) and the bearing housing.
6. Divide the distance in half, and back up jam bolt (37-B) half
the total axial distance (“X”).
At this point, secure jam bolt
(37-B) with its jam nut.
7. Secure the bearing housing against jam bolt (37-A), and bring
up jam bolts (37-A) and (37-C) and the thru-bolts (36).
8.
Single Mechanical Seal
. Refer to the seal manufacturer’s
recommendations, and secure the seal to the shaft sleeve
by tightening the set screws or clamp.
Double Mechanical Seal
. The seal length is preset by the
stuffing box, and only the set screws need to be tightened.
Use an Allen wrench through the flush tap.
Torque Specifications
Casing Bolts
AA, AB: 12-13 ft-lbs
A30-A70: 28-32 ft-lbs
Gland/Stuffing Box Nuts
1-3/8” Dia. Shaft: 2-4 ft-lbs
1-7/8” Dia. Shaft: 3-5 ft-lbs
2-1/4” Dia Shaft: 5-7 ft-lbs
Note: Excessive torque loads on gland nuts may break
back cover.
