Goulds Pumps 3100 - IOM - Manual (Page 38)

3. Inspect leading and trailing edges of vanes for
pitting and erosion or corrosion damage
(Area “a” in Fig. 21).
4. Check impeller bore and key way. Refer to
Table 4 for bore measurement. If oversize,
replace impeller.
Table 4
Impeller Bores
Group Impeller Bore
S .875/.976
M 1.250/1.251
5. Check impeller key way and key (178) for fit
and damage.
6. Inspect hub faces (Area “b” in Fig. 21). Surface
should be free of pits, grooves, and scratches.
7. Inspect hydraulic balance holes (drilled holes
near impeller hub, not valid for 2x3-6). Remove
any obstructions.
SEAL CHAMBER (184) - M GROUP ONLY
1. Make sure seal chamber (184) is clean at
adapter face (Fig. 22).
2. Inspect all sealing surfaces (Areas “a” and “b” in
Fig. 22). Surfaces should be clean and free of
pits, grooves, scratches and wear.
3. Replace if there is any pitting wear greater than
1/8 in. (3.2 mm) deep.
4. Inspect internal seal flush (Area “c” in Fig. 22).
Remove any obstructions.
SEAL CHAMBER/ADAPTER (184) -
S GROUP ONLY
1. Make sure seal chamber (184) is clean at
adapter face (Fig. 23).
2. Inspect all sealing surfaces (Areas “a” and “b” in
Fig. 23). Surfaces should be clean and free of
pits, grooves, scratches and wear.
3. Replace if there is any pitting wear greater than
1/8 in. (3.2 mm) deep.
4. Check Seal chamber/adapter (184) for cracks
or excessive corrosion. Replace if any of these
conditions exist (Fig. 23).
30
3100 IOM 1/97
Fig. 21
Fig. 22
Fig. 23