Waterax MARK-3 - Pump End Assembly and Testing

WATERAX MARK-3 Owner's Manual
03/2016 – Page 43 of 52
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
-
-
600149
12-2DS PUMP SHAFT SUB-ASSY W/IMPEL,
SEALED BEARING (INCL. * & ** ITEMS)
-
-
600147
12-2ES PUMP SHAFT SUB-ASSY, SEALED
BEARING (INCL. * ITEMS)
-
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. Ensure that retaining ring shoulder faces the bearing.
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.
Drive bushing
shoulders in contact
with seal housing;
seal must be
discarded.