Goulds Pumps 3296M - IOM - Manual (Page 41)

IMPELLER (101)
1. Inspect wear ring surface for signs of pitting.
2. Inspect front and back wear ring clearance per
wear ring clearance Table 9.
3. Inspect leading and trailing edges of vanes for
pitting, and erosion or corrosion damage.
4. Check impeller bore and keyway. Bore should
measure .7490 to .7505 in. (19.025 to 19.063 mm).
If oversize, replace impeller.
5. Check impeller balance per Table 10. Values are
based on ISO - 1940/1 grade 2.5 at 3000 RPM.
Table 10
Impeller Balance Specification
Part # Pattern # Part Name oz-inches
C03333A 68455 2x3-8 Impeller .04
C03363A 68491 3x4-8 Impeller .06
C03362A 68490 3x4-8G Impeller .05
C03335A 68456 1x2-10 Impeller .06
C03172A 68325 2x3-10 Impeller .06
C03367A 68457 3X4-10H Impeller .07
C03360A 68358 1.5x3-13 Impeller .09
C03265A 68383 2x3-13 Impeller .09
FLUSH SCREEN (187)
1. Must be clean and free from holes or tears.
2. Inspect for erosion and corrosion.
FRAME ADAPTER (108)
1. Inspect wear ring clearances per clearance Table
9.
2. Check all internal recirculation passages to make
sure they are open and free from excessive wear
due to erosion or corrosion.
3296 M Group 6/05
37
Table 9
Diametrical Wear Ring Clearance
Group Size
LOCATION
Ê
Impeller to casing
in. (mm)
Ë
Impeller to wear ring
in. (mm)
Ì
Driven magnet
to adapter
in (mm)
Í
Drive Magnet
to Rub Ring
in (mm)
New Replace New Replace New Replace New Replace
M
2x3-8
.024 - .028
(.61 - .71)
.048 (1.22)
.024 - .028
(.61 - .71)
.048
(1.22)
.024 - .028
(.61 - .71)
.048 (1.22)
.067 - .073
(1.70 -
1.85)
.090 (2.29)
3x4-8
.026- .030
(.66 - .76)
.052 (1.32)
.026 - .030
(.66 - .76)
.052
(1.32)
3x4-8G
.026 - .030
(.66 - .76)
.052 (1.32)
.026 - .030
(.66 - .76)
.052
(1.32)
1x2-10
.022 - .026
(.56 - .66)
.044 (1.12)
.026 - .030
(.66 - .76)
.052
(1.32)
2x3-10
.026 - .030
(.66 - .76)
.052 (1.32)
.026 - .030
(.66 - .76)
.052
(1.32)
3x4-10H
.027 - .031
(.69 - .79)
.054 (1.37)
.026 - .030
(.66 - .76)
.052
(1.32)
1 1
2
x3-13
.026 - .030
(.66 - .76)
.052 (1.32)
.026 - .030
(.66 - .76)
.052
(1.32)
2x3-13
.026 - .030
(.66 - .76)
.052 (1.32)
.026 - .030
(.66 - .76)
.052
(1.32)