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Liquiflo Installation, Operation & Maintenance Manual
5.4
PUMP ASSEMBLY
Follow the procedure below and refer to the Sectional and Exploded View drawings in Appendix 4. Drawing
reference numbers are given in parentheses in the following procedure.
Caution!
Be certain that the power to the motor is turned OFF and locked out.
Bracket Installation – Legacy Design:
NOTE:
Step 1
applies only to pumps with Type 9A Single Mechanical Seal, Double Mechanical Seal or
Packing. If the blue-painted pump mounting bracket is already installed, or for Type 21 and Type 9T Single
Mechanical Seals, start with
1
Install the mounting bracket (14) to the motor or power frame using four sets of bolts (15) and
lockwashers (16).
NOTE: For pumps with a Packing Seal or Double Mechanical Seal, a spacer plate (10) and longer mounting
bolts (15) are required. Refer to Appendix 1 for the lengths and torque specifications of the bolts.
Shaft Inspection & Polishing:
2
Inspect the pump shaft (4) and verify that it has not been scored or worn from prior use.
Caution!
If the shaft exhibits excessive wear, it must be replaced.
3
Remove any burrs or scratches on shaft (4), by polishing, prior to reassembling pump.
Caution!
This step is important to ensure the proper fit of parts and
to prevent scoring of the seal on reassembly.
Installation of Seals:
4
The pump can have any one of five different types of seals. Refer to the applicable section below for
installation of the pump's seal:
Section
Seal Installation
A
Single Internal Mech. Seal
B
Single Internal Mech. Seal
C
Single Internal Mech. Seal
D
Double Mechanical Seal
E
Packing Seal
Step
2.
Mech.
Pos.
Seal
Type
Code
21
9T
1, 6
9A
2, 3
9T
---
5, 7
20
®
Centry
Series Centrifugal Pumps
Model 620 – Sealed
Reference Drawings
Page
4
#s
Sectional
0
21-22
#1
23-26
#2 / #2A
27-28
#3
4
29
#4
30
#5
Page
Exploded
#s
View
#1 / #1A
38-39
#2
40-41
#3
42-43
#4
44-45
#5
46-47
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