Page 23
WATERAX
BB-4 Owner's Manual
04/2015
23
Assembly Procedure for Pump End 12-16S
ID ITEM NO DESCRIPTION
QTY
16 700006 12-17 COUPLING BUFFER
1
17 700037 12-2C PUMP SHAFT FOR 12-16
1
18 800364 12-25 SCREW #8-32X7/16 PHILLIPS FLAT
NYLON LOCK SS
6
19 700032 12-3 RETAINING RING FOR BEARING, ALU. 1
20 700044 12-48S DOUBLE ROW BALL BEARING WITH
SEAL
1
21 700008 12-28NS MECHANICAL ROTARY SEAL
1
22 700036 12-7 IMPELLER, ALU.
3
23 700014 12-6 DISTRIBUTOR, ALU.
1
24 700065 12-9 DISTRIBUTOR, ALU.
2
25 700074 12-11 IMPELLER, ALU
1
26 600089 12-49 LOCKWASHER SS
1
27 700012 12-50 LOCK NUT SS
1
28 800450 12-26 O-RING
1
29 800363 12-27 O-RING
2
- 701169 GASKET BURASIL FOR 12-28NS SEAL
-
- 701170 O-RING FOR 12-28NS SEAL
-
NOTE:
The sealed bearing eliminates pump failure dangers related to
improper greasing by completely removing the need to grease the
pump end bearing.
Important:
When reusing components, carefully inspect the parts. Ensure that key dimensions are within
acceptable limits. Visually inspect the parts for pitting, worn vanes, damaged threads, damaged gasket
faces, excessive corrosion, deformation, etc. Discard any component that is not within acceptable
standards. Ensure that the components are clean before installing.
Mechanical Rotary Seal:
The mechanical rotary seal requires careful
inspection. The seal should be discarded if there are signs of leaks or if the
internal drive bushing is excessively deformed. The drive bushing must be
free to rotate without contact with the brass housing. If there is contact
between the drive bushing and the housing, the seal must be discarded.
1. Slide bearing retaining ring #19 on shaft #17 with plain face toward coupling collar.
2. Press bearing #20 on shaft using tool 600052.
3.
Carefully
press rotary seal #21 in pump body #3 using pressing sleeve tool 700531.
4. Apply a small amount of dish soap on mechanical rotary seal O-ring to facilitate installation of pump
shaft. Carefully pass end of shaft assembly through mechanical rotary seal bore. Make sure that flat
sections of shaft line up with rotary seal drive bushing flat sections. Gently press down shaft until ball
bearing rests firmly against shoulder in pump body. To verify that shaft has been properly installed,
slowly rotate shaft by hand; rotary seal drive bushing should rotate with shaft.
5. Attach retaining ring #19 to pump body with six screws #18 to a torque value of
22-25 in-lbs / 2.5-2.8
Nm
. Tighten evenly.
6. A small amount of marine grease can be applied onto shaft to facilitate future disassembly.
7. Slide impeller #22 onto shaft, and engage with mechanical rotary seal.
8. Smear the O-rings with a suitable lubricant to facilitate assembly.
9. Place O-ring #28 in groove of distributor #23.
10. With open end of pump body in vertical position, carefully lower distributor #23 until it rests on bottom
of body. Ensure that O-ring did not fall out of position during installation of distributor.
11. Slide impeller #22 into position, aligning with previous impeller.
12. Place O-ring #29 in groove of distributor #24.
13. Using arbor press and assembly tool 700540, apply several light, downward strokes of press ram
until distributor "drops" into body and rests on previous distributor.
16
17
18
19
20
21
22
23
24
25
26
27
22
24
22
28
29
(2/2)
Drive bushing
shoulders in
contact with
seal housing;
seal must be
discarded.
