Assembly Procedure For Pump End 12-16S - Waterax MARK-3 Owner's Manual

Assembly Procedure for Pump End 12-16S

ID ITEM NO DESCRIPTION
16 700006 12-17 COUPLING BUFFER
17 700037* 12-2C PUMP SHAFT FOR 12-16
18 800364 12-25 SCREW #8-32X7/16 PHILLIPS FLAT
NYLON LOCK SS
19 700032* 12-3 RETAINING RING FOR BEARING, ALU.
20 700044* 12-48S DOUBLE ROW BALL BEARING WITH
SEAL
21 700008 12-28NS MECHANICAL ROTARY SEAL
22 700036** 12-7 IMPELLER, ALU.
23 700014 12-6 DISTRIBUTOR, ALU.
24 700065 12-9 DISTRIBUTOR, ALU.
25 700074** 12-11 IMPELLER, ALU
26 600089** 12-49 LOCKWASHER SS
27 700012** 12-50 LOCK NUT SS
28 800450 12-26 O-RING
29 800363 12-27 O-RING
- 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.
QTY
1
1
6
1
1
1
3
1
2
1
1
1
1
2
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-
-
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03/2016 – Page 43 of 52
WATERAX MARK-3 Owner's Manual
Drive bushing
shoulders in contact
with seal housing;
seal must be
discarded.