Wanner Engineering, Inc.
6
United States
Instant Information: www.wannereng.com
(61) 33-5681 Fax (61) 33-6937
SCK-991-400B
Service
Pump Records
Maintain data cards or pump records whenever possible.
This will provide ready access to information for ordering
spare parts, and for evaluating pump and mechanical seal
performance.
The following information should be included in
these records:
• Pump size and serial number
• Pump model number, impeller diameter, and material of
construction
• Mechanical seal manufacturer, type, code, and drawing
number
• Motor horsepower and speed of operation
• Service conditions
• Frequency of operation
• Record of maintenance, including parts usage and general
condition of pump
• Nomenclature and part number of replacement items.
Disassembly
Note:
Refer to drawing on page 9 for part identification.
1. Lock out power to the pump driver.
2. Close the suction and discharge valves. Flush the pump
through the bypass system.
3. Remove the coupling spacer.
4. Remove the drain plug (24). Drain the oil from the frame
(18).
5. Remove the rear pump-to-base mounting bolts from the frame
support (19).
Note:
On AA and AB models, the frame support (19) is part
of the frame (18).
6. Remove the eight casing nuts (41). Remove all casing bolts
(35) except the lower two.
7. Remove the frame (18), shaft (5), and impeller (3) as an
assembly. The casing (1) may be left attached to the
piping.
8. Remove the oiler assembly (23) — not shown in Fig. 7.
9. Remove the coupling half from the pump shaft.
10. Remove the casing O-ring (4) from the back cover (2).
Caution: Do not remove the impeller by striking it with a
hammer or similar object.
11. With a special wrench (see note below), hold the shaft at the
key on the coupling end.
Note:
An impeller removing wrench can be easily made by
welding two steel bars to an old coupling hub.
12.
Turn the impeller (3) until the wrench contacts the work
table on the right-hand side as seen from the impeller
end of the pump.
13. Using a firm grip,
spin the impeller to the left, impacting
the
wrench on the work table. After a few impacts, the impeller
should screw off easily.
14. Remove the sleeve O-ring from the impeller.
15. Remove the nuts (40-A) from either the gland (30) or stuffing
box (46).
16. Remove the frame-adaptor nuts (40-C), and carefully pull the
frame assembly and shaft, along with the mechanical seal
and gland, away from the adaptor and back cover.
17.
Single Outside Seal.
Loosen the mechanical seal drive collar
on the seal until it is completely free on the shaft.
Double Internal Seal.
The seal is housed inside a stuffing
box. Enter through the top 1/4-in. outlet and use an Allen
wrench to disengage the seal set screw.
18. Remove the shaft sleeve (6), along with the mechanical seal
and gland (30) or stuffing box (46).
Note: If you are replacing or installing a mechanical seal
or shaft sleeve, no further disassembly is required.
19. If further disassembly is required, remove the adaptor/cover
nuts (40-B). Remove the back cover (2) and mounting plate
(28).
20. Remove the deflector (26), which is lightly press-fit on the
shaft.
21. Remove the three bolts (36) securing the bearing housing
(15) to the frame (18).
22. Remove the bearing housing (15) and shaft from the frame,
being careful to support the impeller end of the shaft
.
Note:
It may require a few light taps with a soft-nosed hammer
on the impeller end of the shaft to slide it out of the bearing
frame.
23. Remove the O-ring (16) from the bearing housing.
24. Using a Truarc pliers No. S-6700 (No. S-6500 for AA or AB
pumps), remove the tapered snap ring (17) from its groove
in the I.D. of the bearing housing.
25. Remove the shaft (5) and bearings (11 and 12) from the
bearing housing.
Note:
The bearings are not press-fit into the housing, so the
shaft can be removed with light blows from a mallet.
26. Pry the tab of the lock washer (13) out of the groove in the
lock nut (14). Remove the lock nut and washer.
27. Press the bearings (11 and 12) from the shaft.
28. If the oil seals (20 and 21) are to be replaced, drive them from
their bores.
