Goulds Pumps CV 3171 - IOM - Manual (Page 28)

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CV 3171 IOM 05/11
IMPELLER CLEARANCE SETTING – CV 3171
Sizes: 2 x 2-8; 2 x 2-10; 3 x 3-10; 2 x 3-13; 3 x 4-13
WARNING
Lock out driver power to prevent
electric shock, accidental startup and
physical injury.
DIAL INDICATOR METHOD
1. Remove coupling guard.
2. Remove coupling if required
3. Set indicator so that indicator button contacts
either the shaft end or the face of the coupling
(Figure 10).
4. Loosen each locking bolt (370C) several turns.
5. Loosen jam nuts (415) on jack bolts (370D) and
turn bolts in several turns until impeller contacts
the adapter cover. Turn shaft to ensure contact
is made.
6. Set dial indicator at zero.
7. Alternately back off the jacking bolts (370D) and
tighten the locking bolts (370C) to move the
impeller away from the adapter cover until the
dial indicator shows that a .060” clearance has
been obtained.
8. Tighten all bolts and the jam nuts (415) evenly.
9. Check shaft for free turning.
10. Replace coupling.
11. Replace coupling guard.
FEELER GAUGE METHOD
1. Remove coupling guard.
2. Remove coupling if required.
3. Loosen each locking bolt (370C) several turns
(Figure 11).
4. Loosen jam nuts (415) on jack bolts (370D) and
turn bolts in several turns until impeller contacts
the adapter cover. Turn shaft to ensure contact
is made.
5. Turn in locking bolts (370C) until they are snug
against the shell. Loosen jack bolts (370D) until
a 0.060” feeler gauge can be inserted between
the underside of the locking bolt head (370C)
and the bearing shell (134).
6. Tighten locking bolts (370C) evenly until they
are tight against the bearing shell (134). Make
sure all bolts are tight. Tighten jam nuts (415).
7. Check the shaft for free rotation.
8. Replace coupling.
9. Replace coupling guard.
Both of the above methods set the impeller 0.060”
away from the adapter, giving the required clearance
for ambient temperatures. For high temperatures, it
is recommended that this procedure be repeated
after the pump reaches operating temperature.
Figure 10
Figure 11