Goulds Pumps CV 3171 - IOM - Manual (Page 29)

CV 3171 IOM 05/11 29
IMPELLER CLEARANCE SETTING – LF SIZES
LF 1 x 1.5-8; LF 1 x 2-10; LF 1.5 x 3-13
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 pump
coupling hub (Figure 12).
4. Loosen jam nuts (415) on jack bolts (370D).
Back off jack bolts several turns.
5. Turn all locking bolts (370C) in several turns
until impeller contacts the casing (100). Turn
shaft to insure contact has been made.
6. Set dial indicator at zero.
7. Loosen the locking bolts (370C) and tighten the
jacking bolts (370D) to move the impeller away
from the suction cover until the dial indicator
shows that a 0.015” clearance has been
obtained.
8. Tighten all bolts and the jam nuts (415) evenly.
9. Check the shaft for free rotation.
10. Replace coupling.
11. Replace coupling guard.
FEELER GAUGE METHOD
1. Remove coupling guard.
2. Remove coupling if required.
3. Loosen jam nuts (415) on jack bolts (370D).
Back off jack bolts several turns (Figure 13).
4. Turn all locking bolts (370C) in several turns
until impeller contacts the casing (100). Turn
shaft to insure contact has been made.
5. Loosen locking bolts (370C) until a 0.015” feeler
gauge can be inserted between the underside
of the bolt head and the bearing shell (134).
6. Tighten jack bolts (370D) evenly until the
bearing shell (134) is tight against the locking
bolts (370C). 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 0.015”
away from the adapter, giving the required
clearance for ambient temperatures. For high
temperatures, it is recommended that this
Figure 12 Figure 13
5