Goulds Pumps API 3171 - IOM - Manual (Page 36)

370C
415
370D
A
• A—Dial indicator
3. Loosen the jam nuts (415) on the jack bolts (370D) , and then back the bolts out about two turns.
4. Tighten the locking bolts evenly (370C), bringing the bearing housing (134A) towards the frame (228)
until the impeller contacts the casing.
5. Turn the shaft to ensure that there is contact between the impeller and the casing.
6. Set the indicator to zero and loosen the locking bolt (370C) about one turn.
7. Thread in the jack bolts (370D) until the jack bolts evenly contact the bearing frame.
8. Tighten the jack bolts evenly about one flat at a time, moving the bearing housing (134A) away from
the bearing frame until the indicator shows the correct clearance.
Refer to the impeller clearance table to determine the correct clearance.
9. Tighten the bolts evenly in this order:
a) Tighten the locking bolts (370C).
b) Tighten the jack bolts (370D).
Make sure to keep the indicator reading at the proper setting.
10. Make sure the shaft turns freely.
Set the impeller clearance - feeler gauge method
WARNING:
Always disconnect and lock out power to the driver before you perform any installation or maintenance
tasks. Failure to disconnect and lock out driver power will result in serious physical injury.
1. Lock out the driver power and remove the coupling guard.
2. Remove the coupling, if required.
3. Loosen the jam nuts (415) on the jack bolts (370D), and then back the bolts out about two turns.
4. Evenly tighten the locking bolts (370C) in several turns until the impeller contacts the suction cover
(182).
5. Turn the shaft to ensure that there is contact between the impeller and the suction cover.
6. Loosen the locking bolts (370C) until a 0.015" feeler gauge can be inserted between the underside of
the bolt head and the bearing shell (134).
Commissioning, Startup, Operation, and Shutdown
34 Model API 3171 Installation, Operation, and Maintenance Manual